CONSTRUCTION, COMPLETION & MAINTENANCE OF

GUARD HOUSE (B17), POTABLE WATER PUMP ROOM (B20), FIRE

PUMP ROOM (B21), IRRIGATION PUMP ROOM (B23), SITE
EXTERNAL WORKS- ROAD WORKS, LANDSCAPE, ELV, CCTV,
CABLE ROUTING, IRRIGATION NETWORK, SURFACE DRAINAGE,
FIRE NETWORK & DRAINAGE NETWORK

INFRASTRUCTURE WORKS FOR GWC LOGISTICS HUB

AT BU SULBA

PACKAGE-5

VOLUME 2B:MEP SPECIFICATION

Volume 1 : Front End Documents & Contract Particulars

Volume 2A : Technical Specifications (Architectural & Civil )
Volume 2B : MEP Specifications
Volume 3 : Notes on Pricing & Bill of Quantities
Volume 4 Drawings – (Bounded Separately)
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CONTENTS
1.0 GENERAL 5
1.1 Objective 5
1.2 Definition Of Terms 5
1.3 Conflict And Order Of Precedence 5
1.4 Applicable Codes, Standards & Specifications 5
2.0 GENERAL PROVISON FOR ELECTRICAL INSTALLATION 6
2.1 Scope 7
2.2 Regulations 8
2.3 Existing Services 8
2.4 Contract Drawings 8
2.5 Shop Drawings 8
2.6 Progress Drawings 8
2.7 AS Built Drawings 8
2.8 Builders Work 8
2.9 Programme 9
2.10 Equipment and Material Approval 9
2.11 Fire and Safety Precautions 9
2.12 Protection 9
2.13 Quality of Staff and Personnel 9
2.14 Climatic Conditions 9
2.15 Samples 9
2.16 Quality of Materials 10
2.17 Equipment Duties and Rating 10
2.18 Workmanship 10
2.19 Labels /Circuits Lists /Cable Identification 10
2.20 Segregation of Services 10
2.21 Electricity Supply 10
2.22 Polarity 10
2.23 Safety Interlocks 10
2.24 Spare parts 10
2.25 Protection of Excavation 11
2.26 Supply of Materials 11

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2.27 Special Requirement 11

2.28 System Reliability Testing 11
2.29 Maintenance during Defects Liability Period 11
2.30 Staff Training 12
3.0 MV FACTORY BUILT ASSEMBLIES 12
4.0 PROTECTIVE DEVICES 12
5.0 MOTOR STARTERS 12
6.0 VARIABLE SPPED CONTROLLERS 12
7.0 CABLES AND SMALL WIRING 12
8.0 CONDUIT AND CONDUIT BOXES 12
9.0 TRUNKING 12
10.0 CABLE TRAY AND LADDER 12
11.0 WIRING ACESSORIES AND GENERAL POWER 12
11.1 Local switches for the control of lighting circuits 12
11.2 Socket Outlets 13
11.3 Weatherproof Accessories 13
12.0 LIGHTING FITTINGS 13
12.1 Luminaires 13
12.2 Florescent Fittings 14
12.3 Down-lights 15
12.4 Lamps 15
12.5 Layout 16
12.6 Installation 16
12.7 Luminaire Schedule 16
13.0 EMERGENCY LIGHTING 16
13.1 Luminaire with Self Contained Emergency Battery Packs 16
14.0 ELECTRIC MOTORS 17
15.0 POWER FACTOR CORRECTION CAPACITORS 17
16.0 STANDBY DIESELGENERTOR SET 17
17.0 OIL FILLED DISTRIBUTION TRANSFORMER 17
18.0 ELEVATOR 17
19.0 LIGHTNING PROTECTION SYSTEM 17
20.0 EARTHING AND BONDING 17
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21.0 INSPECTION AND TESTING 17

22.0 DOCUMENTION FORMAT 17
23.0 ELECTRICAL IDENTIFICATION 17
24.0 BATTERY AND BATTERY CHARGER 17
25.0 SMALL ENCLOSURES 17
26.0 DUCTBANK AND MANHOLES 17

ADDENDUM

A. FIRE ALARM SYSTEM

B. DATA/ VOICE SYSTEM
C. CCTV SYSTEM
D. SCHEDULE OF LUMINIARE
E. APPROVED VENDORS LIST

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ELECTRICAL SPECIFICATION AND SCOPE OF WORK

1.0 GENERAL

This electrical specification shall apply to all Electrical Services required for the construction of
proposed Logistics Hub at Bu Sulba.

1.1 Objective
To specify the minimum requirement for the supply of material and installation works required for
the Electrical Services.

1.2 Definition of Terms

Manufacturer – The party which manufactures or supplies the equipment to which this standard
applies.

Client - refers to Gulf Warehousing Company. WLL

Contractor - refers to be nominated Contracting Company
Shall - the word “shall “is to be understood as mandatory
Should - the word “should “is to be understood as strongly recommended
Engineer - Client approving Site representative
QGWEC - Qatar General Water and Electricity Corporation
QCS - Qatar Construction Specification (2014 version) and Standards.

1.3 Conflict and Order of Precedence

In the event of conflict between this Specification and above referred standards & Codes, the
VENDOR shall bring the matter to clients/contractors attention for positive clarification, resolution
and approval in writing before any work is started. Any such conflict having cost or time implications
shall also be advised at tender stage. After award of contract no claims for extra cost shall be
considered resulting from the foregoing.

The order of precedence in resolving such conflicts shall be as follows.

o Project specification and Tender Drawings

o Qatar Construction Specification ( 2014 version ) and Standards
o QGEWC(Kahramaa) Codes and other applicable Local Codes of Qatar
o International Standard (BS,BS-EN and IEC)

1.4 Applicable Codes, Standards & Specifications

1.4.1 International Standards:

IEC 61439-1, 3 – Standard for Low voltage Switchgear and Main Distribution boards

IEC 60529 – Classification & degree of protection provided by enclosures

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BS 7671 – Requirement for Electrical Installation (IEE Wiring Regulation 17th Edition)

IEC 60898 - Electrical accessories LV Circuit breakers for over current protection

IEC 6094-7 - Standard for Air circuit breaker

IEC 60949-1 - Standard for LV circuit breaker

CIBSE GUIDE K Electricity in Buildings

IEEE –Institute of Electrical and Electronics Engineers Standards

CIBSE LG3 - Guide for General Lighting

CIBSE LG7 - Guide for Office Lighting

BS 1363 – Standard for Switched Outlet

BS 5733 – Standard for Lighting Switches

BS EN 60669 – Standard for DP Switches

BS 4607 – Standard for Non- metallic Conduits

IEC-60947 – Standard for Isolator

IEC-60076-1 – Standard for Dry type Transformer

IEC-62271 – Standard for 11 kV MV Switchgear

BS 7430 – Code of Practice for Earthing

BS EN 62305 – Protection against Lightning

BS EN 81 -Safety rule for the construction and installation of lifts

1.4.2 Local Standards and Specification:

a. Section 9-Mechanical and Electrical Equipment - from Qatar Construction Specification

(QCS):2014

b. Section 21-Electrical Works - from Qatar Construction Specification (QCS):2014

c. Regulations for the Installation of Electrical Wiring, Electrical Equipments and Air Conditioning
Equipment 2010 Edition - from (QGEWC) KAHRAMAA.

2.0 GENERAL PROVISON FOR ELECTRICAL INSTALLATION

The work to be carried out under this contract shall comprise but not limited to the supply,
installation, connection, testing, commissioning and setting to work of all items that are necessary for
a complete working electrical installation, as per specifications drafted in these sections, and tender
drawings referred in the schedule of drawings and other related contract documents.
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The Contractor shall refer to Qatar Construction Specification (QCS) 2014 Section -21 for following
Clauses with applicable amendments and addendum described hereunder:

2.1 Scope (Refer to QCS -21 Part 1 Clause 1.1.1 and with addendum below)

Supply, Installation, testing and commissioning of works for the following:

i) Laying of all external cables as per the drawing and SLD which include but not limited to the
following :
a) Conduct of site coordination, investigation and survey to properly identify existing
services (Cables, pipes, etc). Nominated contractor shall notify and ask permission to
client or required authority as necessary prior to diversion, relocation or modification of
existing services.
b) Cable termination of both ends.
c) Concrete covered PVC ducts for external cables and some internal cables as
applicable.
d) Required Civil works for laying KAHRAMAA 11 KV Incomer cables. This item includes
required works and assistance for interconnection to substation equipments.

ii) All required internal cabling and wiring as per the drawing.
iii) Sub Main Switch boards, SMB, DB’s and isolators for equipment ( HVAC, firefighting , plumbing
and Kitchen equipment as required, etc., including mounting supports and concrete plinth if
required.
iv) All electrical cabling and electrical services required for the operation of the air conditioning,
Kitchen equipment, ventilation systems, mechanical systems potable water pumps, booster
pumps, Firefighting pumps kitchen equipments and other equipment ( lift , etc,) to make the
system and operation functional.
v) Small power system including single or twin switched 13A outlet, faceplates connected in ring
complete with wires, boxes and conduit for complete connection. Item includes industrial
socket as required.
vi) Indoor and outdoor lightings with complete sets of lamps, control gears and all associated sub-
circuits, conduits, controls, switches etc. For outdoor lighting, cable including trenching and
backfilling, PVC duct/concrete block. All light fitting shall be as per luminaire schedule. All site
light fittings shall be IP 65.
vii) Power outlets to small capacity ACs and utility services including flex outlet, spur units with
wires, boxes and conduits with complete connections.
viii) All other socket outlets, permanent connection and the like and including all associated sub
circuits, conduits etc.
ix) Dry type Transformers complete with required accessories(as per SLD drawings)
LV Switchboard panels as per then SLD drawing complete with all necessary accessories.
x) kVAR Capacitor bank including power cables, etc., as per single line diagram.
xi) A complete earthing and equipotential bonding system.
xii) A complete lightning protection system.
xiii) Utility power supply for all services like Fire detection system, BMS, CCTV, ELV, etc.
xiv) Hot dipped steel Galvanized trunking, cable ladders, cable tray and their mounting supports.
xv) Liaise with KAHRAMAA for all required works, documents, submittals and to secure updated
information, specification, work order protocol essential for KAHRAMAA inspection to include
pre and post commissioning period.
ix) The Contractor shall also provide the following:
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a. “As Built” drawings

b. Operation and Maintenance manuals
c. Warranty certificates and supplier list and their contact person and address.
d. Testing and commissioning of all electrical system and equipments. Test records shall be
attached to operation manuals.
e. Training of personnel for safe operation of supplied equipment
f. All associated building work including cutting, chasing, penetrations,
g. Anything that has been omitted in any item of works and materials usually furnished
which are necessary for the completion of Electrical works as outlined here in before,
then such items must be and are hereby included in the section of work

CONTRACTOR shall provide the all required tools, devices, equipment, supporting structures,
ancillary works etc., as required to complete the scope of works .Installation method and detailed
shop drawings shall be provided for review and approval by engineer

The CONTRACTOR shall include in the Tender the supply of material and provide all the labor and
supervision, especial equipment and technical expertise, services, etc. for carrying out the above
works.

2.2 Regulations (Refer to QCS-21 Part 1 Clause 1.1.2 except items -e and g and with addendum below)

The whole of the works shall be carried out in accordance with the IEE Wiring Regulations (17th Edition) /
British Standard –Requirements for Electrical Installation (BS 7671: 2008).

2.3 Existing Services (Refer to QCS-21 Part 1 Clause 1.1.3 and with addendum below)

The CONTRACTOR shall be responsible for coordination with other trades and services and shall
provide coordination drawing for engineer approval prior to the start of work. Contractor shall
coordinate with client regarding the existing services.

2.4 Contract Drawings (Refer to QCS-21 Part 1 Clause 1.1.4 and with addendum below)

The approved for construction drawings shall be read in conjunction with the scope of works as detailed
above: -

2.5 Shop Drawings (Refer to QCS -21 Part 1Clause 1.1.5 except item-3 & 10 and with addendum below)

Shop drawings shall be submitted to the client engineer for approval and shall be stamped approved
prior commencement of work and ordering of equipment. All expenses incurred in gaining approvals
shall be included in the tender

2.6 Progress Drawings (Refer to QCS -21 Part 1Clause 1.1.6)

2.7 As Built Drawings (Refer to QC-21 Part 1 Clause 1.1.7)

2.8 Builders Work (Refer to QCS -21 Part 1 Clause 1.1.8 and coordination with client engineer)

2.9 Programme (QCS-21 Part 1 Clause 1.1.9 and with addendum below)

Programme of submissions and completion shall be consistent with the contract programme to avoid
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delays and shall be to the approval of the engineer.

2.10 Equipment and Material Approval (Refer to QCS-21 Part 1 Clause 1.1.10 with addenda below)

All materials and equipment proposed by CONTRACTOR shall be submitted with approved material or
equipment submittal form and shall indicate the material description, BOQ and drawings references. The
material shall be in accordance with the types and manufacture described in this Specification and/or
shown on the drawings. Where the CONTRACTOR desires to use materials differing from those described,
then a written approval shall be obtained from client engineer. CONTRACTOR shall propose three
manufacturers for each material submittal selected from Approved Vendors List. Samples shall also be
presented to client engineer for inspection and approval except for special items that requires inspection
in the factory only.

Materials shall also conform to the appropriate Specifications, British Standard and IEC Specifications.

Client engineers reserves the right to inspect materials on site at reasonable times and to reject any
materials not complying with the Specification. The cost of any dismantling and re-erection of the
installation occasioned by the removal of rejected materials shall be borne by the CONTRACTOR.
Component parts of similar use and rating shall be inter-changeable with each other.

A deviation from this specification is only acceptable where the CONTRACTOR has specified in his tender
under the heading "Deviations from Specification" the requirements he cannot meet and client engineer
has accepted this deviation in writing during evaluation period.

Failure to detail items under "Deviations from Specification" will be interpreted by client as
confirmation that the CONTRACTOR fully comply with the specification.

2.11 Fire and Safety Precautions (Refer to QCS-21 Part 1Clause 1.1.11 with addendum below)

It is the responsibility of the CONTRACTOR to liaise fully with the requirements and regulations of
Client engineer with reference to applicable safety requirements. All Life and Safety relevant shop
drawings and equipment shall be approved by CLIENT ENGINEER for Safety prior to commencement
of work

2.12 Protection (Refer to QCS-21 Part 1 Clause 1.1.12)

2.13 Quality of Staff and Personnel (Refer to QCS-21 Part 1 Clause 1.1.13)

2.14 Climatic Conditions (Refer to QCS -21 Part 1Clause 1.1.14)

2.15 Samples (Refer to QCS-21 Part 1Clause 1.1.15 with addendum below)
In general this would apply to all equipment and materials, which are offered as alternatives to the
specified equipment, where such alternative equipment is allowable. However, samples of specified
materials may be requested for co-ordination purposes etc. (exempted are those big items such as big
motor, generator, etc.)

If samples submitted by the CONTRACTOR do not, in the opinion of client engineer, meet the
requirements of the Specification and the CONTRACTOR fails to provide acceptable samples in a
reasonable time, client reserves the right to obtain samples elsewhere and may require the
CONTRACTOR to obtain the items of equipment from the same source.
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In the case of items of special construction, Clear catalogue cuts or Working Drawings may be
temporarily substituted for sample if this is preferred. Such drawings when approved will be retained by
Client until the items themselves are supplied. Client will give approval only when satisfied that the items
come up to standard on the evidence of the drawings. Client shall be provided with facilities for
inspection of similar equipment already installed.

All materials shall be sources from Vendors included Approved Vendors

2.16 Quality of Material (Refer to QCS -21 Part 1Clause 1.1.16)

2.17 Equipment Duties and Rating (Refer to QCS -21 Part 1 Clause 1.1.17)

2.18 Workmanship (Refer to QCS -21 Part 1 Clause 1.1.18)

2.19 Labels/Circuits Lists/Cable Identification (Refer to QCS-21 Part 1Clause 1.1.19)

2.20 Segregation of Services (Refer to QCS-21 Part 1 Clause 1.1.20)

2.21 Electricity Supply (Refer to QCS-21 Part 1 Clause 1.1.21 with items-7 & 8 shall refer to IFS as the
Client with addendum below)
The power supply to the Proposed IFS building shall be:

General System Voltage : 415V AC, 3 Ph, 3 P+N+E (4 wire)

Frequency : 50 hertz (+/-2%)
Lighting distribution system : 415V, 3 Ph, 4 wire and 240V, 1 Ph, 50 Hz.

2.22 Polarity (Refer to QCS -21 Part 1 Clause 1.1.22)

2.23 Safety Interlocks (Refer to QCS-21 Part 1 Clause 1.1.23)

2.24 Spare Parts (Refer to QCS -21 Part 1 Clause 1.1.24 with addendum below)
General spare parts shall be provided under the Contract as detailed later. In addition the CONTRACTOR
shall include and price, a list of recommended spares, for 24 months operation of the FACILITY. The
agreed spare components and sub-units shall be supplied suitably packed and labelled to ensure that
each item can be individually identified, unpacked and made available in full working condition after
storage. Precautions to be taken for storage and for bringing into operation shall be included with each
item.

If the CONTRACTOR is to install or commission the spare equipment, he shall include in his tender
provision for all materials (replacements and/or consumables) necessary for the proper execution of the
work.
2.25 Protection of Excavation (Refer to QCS-21 Part 1 Clause 1.1.25)

2.26 Supply of Materials (Refer to QCS -21 Part 1 Clause 1.1.26 with addenda below)
The CONTRACTOR shall organize to source, at an early stage of the project, those equipment and
materials considered as critical for timely project completion as identified here under: -

1. Transformers and LV Switchboard, SMB and DB

2. LV Cables
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3. Light fittings
4. Industrial Sockets and Cable ladder and trays
5. Standby Diesel Powered Generator

The CONTRACTOR shall identify in his tender bid all items considered critical to the project by way of
attaching a schedule of those items and anticipated/estimated delivery period.

The CONTRACTOR shall make detailed technical submittals, to client, of the above listed items within
4 (Four) weeks of project commencement so that sufficient lead-time is made available for
manufacture and delivery of the above materials and equipment. The CONTRACTOR shall obtain best
delivery of the above equipment and materials from the manufacturer and local vendor to suit the
overall project works program and shall assume full responsibility of obtaining the materials, strictly
in compliance with the specifications and design intent, on time. Any additional costs necessitated
on account of acceleration of CONTRACTOR’S works and/or change of mode of freight to meet the
project completion date will not be allowed. All associated project delays due to late delivery of
equipment/materials shall be dealt in accordance with the general conditions of the main contract.

2.27 Special Requirement (Refer to QCS -21 Part 1 Clause 1.1.27 but shall refer to KAHRAMAA as the
utility authority)

2.28 System Reliability Testing

The CONTRACTOR shall include for reliability testing at peak design conditions at the end of installation
works. The system must run continuously for 15 days without failures during the reliability testing and
data witnessed by and approved before the issue of the final completion certificate.

2.29 Maintenance during Defects Liability Period

The CONTRACTOR shall also include all overheads at office and site, labor, sundries, plant, appliances
and consumables both for the works and for balancing, testing and commissioning and during the
maintenance period.

The CONTRACTOR shall be responsible for maintenance of the commissioned installations for a
period of one year from the date of preliminary handing over of the project as a whole.

2.30 Staff Training

At the time of preliminary handing over, the CONTRACTOR shall conduct training sessions for
owner’s operating staff to explain the functions and operating procedures of all the systems. The
CONTRACTOR shall deploy their own maintenance team to carry out weekly checks of all equipment
and controls, monthly cleaning of all filters and necessary greasing and lubrication. A visit schedule
shall be submitted, discussed and agreed with the Client Engineer prior to preliminary handing over.
Breakdown calls from the client shall be promptly attended to within maximum 12 hours after the
reported failure. At the end of the maintenance period, the CONTRACTOR shall repair/replace all
defective equipment and materials, provide new coat of paint for equipment and piping and offer
complete installation for checking and approval of the client Engineer before issue of the final
handing over certificate.

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3.0 MV FACTORY BUILT ASSEMBLIES (FBA’s) (Refer to QCS-21 Part 2 but limited to LV Switchboard,
MCCB Panel boards and Distribution boards only as per project drawings and addendum below).
3.1. CONTRACTOR shall also refer and LIASE with KAHRAMAA Material Section for latest specification
for LV Switchboard as basis of approval by them.

3.2. For above 1 kV Switchgear, CONTRACTOR shall refer and LIASE with KAHRAMAA Material Section
for latest specification

4.0 PROTECTIVE DEVICES (Refer to QCS-21 Part 3 but limited to items applicable as per project
drawings)

5.0 MOTOR STARTERS (If applicable only, Refer to QCS-21 Part 4 but limited to DOL, star delta and
independent motor starters only (not built in inside the equipment assembly like AC Package unit,
etc.) as per project drawings)

6.0 VARIABLE SPEED CONTROLLERS Refer to QCS-21 Part 5- Not applicable to project

7.0 CABLES AND SMALL WIRING (Refer to QCS-21 Part 6 but limited to 600/1000 V only, project
drawing and addenda below)
a. Cabling will be as detailed in this specification or on the cable schedule drawing but generally shall
be multi core and single stranded copper XLPE insulated steel wire armoured and PVC sheeted
(CU/XLPE/SWA/PVC). Rating for LV cable shall be 0.6/1KV.
b. All cable must comply with the relevant British Standards Specifications (BS 6724) and be from an
approved manufacturer. Earth continuity conductor (ECC) cable shall be stranded copper with
PVC. For equipment bonding conductor shall be the same type but green colour.
c. The CONTRACTOR shall be responsible for ascertaining the lengths of all cable according to site
condition and as covered by the Specification.

8.0 CONDUIT AND CONDUIT BOXES (Refer to QCS-21 Part 7 and project drawings)

9.0 TRUNKING (Refer to QCS-21 Part 8 and project drawings)

10.0 CABLE TRAY AND LADDER (Refer to QCS-21 Part 9 and project drawings)

11.0 WIRING ACCESSORIES AND GENERAL POWER (Refer to QCS-21 Part 10, project drawings and
addenda below)

11.1 Local switches for the control of lighting circuits shall be as per BS 5733 and of the following types:

(a) For single and multi-gang units in locations where installation work is on the surface,
light switches shall be metal clad type.
(b) For single and multi-gang units in general locations where installation work is concealed
or flushed, light switches shall be of the flushed hard white plastic type.
(c) The switches shall be insulated 'rocker' type generally single pole rated 10 ampere or as
indicated below.
(d) For areas where switches are shown connected to different phases, in the same location,
multi-gang switches are to be used with an approved phase barrier and warning label.
(e) For single and multi-gang units in equipment and pump rooms, and for all external
applications if conduits are surface run, switches shall be to IP54, with high impact metal
clad plate and housing.
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(f) All switches shall have white colour if controlling lights feed from non essential circuits
and red colour if for essential loads feed from UPS or generator.
11.2 Socket Outlets

All socket outlets shall be as per BS 1363 and the rating and type shall be as detailed on the drawings and
shall have cover plates finish to match the lighting switches unless otherwise specified.

Where 13 amp sockets are shown, these shall be of the 240V, wired on ring circuits. DP switch should
have a neon light indicator and rating as per DB schedule. DP Switch shall be as per BS EN 60669-1.

Normal socket plates shall have white colour if feed from normal power source and shall be in red colour
if feed from essential source.
Metal clad cover plate shall be provided for outlets located in corridor, pantry, store or any areas
mechanical damage may occur.

11.3 Weather proof Accessories

Wherever weatherproof "WP" accessories are called for they shall be to IP 54 for Damp or Dirty Area and
IP 65 if located outdoor.

12.0 LIGHTING FITTINGS (Refer to QCS-21 Part 11, project drawings, Luminaire Schedule in attachment
and addenda below)

12.1 Luminaires

The CONTRACTOR shall provide, install and connect, including all necessary materials, all luminaires in
accordance with the makes and types in the schedule of luminaires, including lamp holders,
glassware, diffusers and ancillary equipment.

Client reserves the right to inspect a sample of each type of specified fitting for final approval prior to the
placing of the order for the total quantity.

All luminaires shall be supplied and installed complete with lamps and tubes.
Fluorescent luminaire shall comply with BS 4533 'Luminaires' and BS 5042, Part 4 'Built in lamp holders
and starter holder for tubular fluorescent lamp'.
Lamp holders for use with tubular, fluorescent lamps shall be bi-pin complying with BS1875
Tungsten luminaires shall also comply with BS 4533 'Luminaires'. Lamp holders for use with tungsten
filament lamps shall be of non-ferrous metal type and so connected that the screw portion is in the
neutral conductor. The lamp holders shall be suitable for use with the following type of lamp cap.
Up to and including 100W, the lamp cap shall be of the "Bayonet" type complying with BS52 and BS5042
Part 1, "Bayonet lamp caps lamp holder and BS adapters (lamp holder plugs) for voltages not exceeding
250 volts”.

From 150W to 250W lamps the lamp cap shall be of the complying with BS 5042 Part 2 "Dimensions of
screw lamp caps and lamp holders (Edison type)".

An exception to the above may be made when special luminaires require non standard lamps. Where
lamp holders are screwed direct to steel conduit systems they shall be brass, unless they are installed in a
bathroom or toilet when they shall be insulated.
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Insulated lamp holders shall be suitable for direct mounting on circular conduit boxes to which the
luminaire is fitted.

For surface mounted luminaires the cabling or conduit system shall terminate in circular conduit boxes to
which the luminaire is fitted.

Where continuous lines of surface mounted luminaires are specified, runs shall be mounted true and in a
straight line with no gaps between adjacent luminaires. Manufacturer's recommended joining
components shall be used.

All 'Discharge' lighting units shall be provided with a capacitor for the purpose of power factor
correction. Light fittings in chiller n freezer should be applicable only for cold temperature (-25’C).

12.2 Fluorescent Fittings

All fluorescent lighting fittings shall be complete with electronic high frequency control gear unless
otherwise specified. The electronic ballast shall be suitable for operation between mains voltage of 240V
with tolerance in safety of ±10% and performance ±6% to 8%. The electronic ballast shall operate under
mains frequency of 50Hz with operating frequency >42kHZ. The power factor shall be >0.96

The ignition time shall be < 0.5second and over voltage protection shall be 48 hrs @ 320V AC and 2 hrs @
350V AC. The electronic ballast shall be capable of withstanding a temperature of 75ºC with inaudible
hum and noise levels.

Suppression of Radio Frequency interference shall be such that no effect shall be caused whatsoever on
surrounding electronic equipment. The radio frequency interference shall comply with international
standards and with EN55015 and 55022A.

Lamp holders and other auxiliaries shall be in accordance with C.E.E. 12 and each fitting shall be provided
with a rust inhibitor after degreasing and all fittings painted with not less than three coats of stove
enamel paint. They shall be of rigid construction and capable of being fixed at two points only on their
length without visible distortion.

Simple means shall be provided for the removal of diffusers for lamp replacement and lamp holders
arranged so that a lamp can easily be removed and replaced by one man.

Circuit wiring to the fluorescent luminaires shall be so arranged to eliminate the use of the luminaires as
an enclosure for through wiring. Where fluorescent luminaires are mounted on fibre or other thermally
insulated ceilings, provide adequate clearance for ventilation by lugs or spacers to maintain a suitable
air gap between the rear of the fitting and the ceiling.

For suspended type fluorescent luminaires these fittings should be mounted on galvanised steel conduit
drops to the height specified and provided with ball and socket.

12.3 Down-lights
The down lights shall use energy efficient LED a or compact fluorescent lamps and shall have cast
aluminium housing designed as heat sink which gives the light fittings optimum thermal properties.

The reflectors shall have consistent cut off angles for variety of lamps and apertures. Within this cut off
angles the luminaire shall have no disturbing glare. The curvature of the reflectors shall be computer
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calculated to confirm to individual light sources and predetermined cut off angles. Within this cut off
angles the reflector shall remain dark where by the human eye is dazzled neither by the light itself nor by
its reflection. All down-light versions shall be available in different sizes and cut off angles for variety of
lamps.

The reflectors shall be aluminium, gold or silver as specified and shall be post anodised with scratch
resistant special coating.

The compact fluorescent down-lights shall have cast aluminium ceiling ring and four-point mounting
ensuring a stable installation of the “down-light” without requiring any tools.

The luminaires shall be connected to the mains through junction box with integral terminal block and
cable clamp. Control gear can be replaced or retrofitted if necessary without replacing the luminaires.
The directional down-lights for tungsten halogen lamps and compact fluorescent lamps can be tilted
through 40º and fully rotatable, enabling them to direct their beams at virtually any point in a room or on
a wall.

12.4 Lamps

No incandescent lamps shall be used .Lamps shall be of the manufacture, wattage and type specified.
They shall be of the correct voltage rating for the particular system concerned.

Fluorescent tubes shall conform to the standard type of lamp cap required by each specific light fitting
detailed. They shall be of high quality manufacture, with each type of lamp used being in accordance with
accepted standard of rated lamp life. All lamps of each type (tungsten, fluorescent) shall be from the
same manufacturer. The lamps shall be from client approved Vendor’s List.

Tungsten filament lamps shall have coiled coil filaments 40-150 watts. Lamps shall be pearl finish when
fitted in open shades or in enclosures, which are un-obscured and shall be of the clear type when fitted in
close opalescent glassware or any other type of fitting where the filament is not under direct vision.
Lamps shall be supplied by the CONTRACTOR and installed in all lighting fittings.

Spare lamps shall be handed over at completion and shall be in the quantity of 5% of the total of each
type of discharge lamp used and 10% of the total of each tungsten filament lamp used subject to a
minimum quantity of 5 nos. of each type of lamp.

All fluorescent lamps shall be of the hot cathode type and shall be manufactured in accordance with
BS.1853 "Tubular fluorescent Lamps for General Lighting Service" or IEC 81. For efficiency T5 or T16
fluorescent lamp shall be used unless it is not available in the selected luminaire.
All lamps shall have identical colour rendering and shall be new generation tri-phosphor offering superior
colour-metric and photometric performance unless specifically noted otherwise having a colour
temperature, of approximately 3500ºK (warm white).Diagram.

12.5 Layout
The layout drawings indicate the general position of lighting points. However, the final position shall be
co-ordinated with the final ceiling setting-out layout approved by client engineer. Unless specified
otherwise the suspended ceiling system should not be used to carry the weight of lighting track, bus bar
or luminaire. They should be independently supported from the underside of the slab by approved
supports.

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12.6 Installation
The CONTRACTOR shall check all ceiling heights to ascertain that the specified fittings shall be mounted
at the correct height to the bottom of the fittings. The CONTRACTOR shall carry out all adjustments to
suspension tubes, chains, etc. that may be necessary to comply with the required mounting heights as
indicated in the approved for construction drawing.

All fittings shall be thoroughly cleaned using anti static cleaning fluid prior to erection and finally wiped
when in position to remove all finger marks etc.

Fixing and suspension plates shall be suitable for direct connection to BS conduit boxes or as otherwise
specified. All fittings having rigid tubular suspension shall be provided with ball and socket. The rigid type
of back plates will not be accepted.

Within plant rooms, ceiling mounted luminaires shall be complete with chain suspensions of adequate
length to provide suitable illumination when all plants are erected. The final locations of luminaires
within plant rooms shall be agreed on site with client Engineer to suit arrangement.

12.7 Luminaire Schedule

The CONTRACTOR shall include in the tender price for the specified manufacturer of luminaries as given
in luminaire schedule in the attachments. However, the CONTRACTOR may propose alternate
manufacturer to the specified substantiated with documentary evidence and technical details for the
suitability of the proposed luminaires in relation to the specified. However the tender is deemed to
include for the specific manufacturer of luminaires listed within the specification to enable the tender
analysis to be carried out.

Client is not obliged to accept any alternative or to give reasons for rejections. The CONTRACTOR will be
required to provide the specified manufacturer if client is not satisfied with the alternative offered. The
tenderer must state at the time of tender that his price includes for all the manufacturers/ type
references of luminaires as specified.

13.0 EMERGENCY LIGHTING (Refer to QCS-21 Part 12 with clause 12.2.2 and 12.3.2 not applicable,
project drawings)

13.1 Luminaire with Self Contained Emergency Battery Packs

For light fitting with emergency pack, the high frequency electronic control gear shall be suitable for
DC voltage operation during emergency backup. The earth leakage current shall be <0.5mA per
ballast with constant light output with AC mains 202-254 volts.

14.0 ELECTRIC MOTORS (Refer to QCS-21 Part 15, project drawings and addendum below)

15.0 POWER FACTOR CORRECTION CAPACITORS (Refer to QCS-21 Part 16, project drawings)

16.0 STANDBY DIESEL GENERATOR SET (Refer to QCS-21 Part 17 as applicable if required and addendum
below)
16.1 Diesel Powered Generator complete with control panel, auto transfer control, noise mitigation
and fuel day tank. Generator rating to be as per client requirements. The requirement of a bulk fuel
tank also to be as per client’s requirement.

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17.0 DISTRIBUTION TRANSFORMER (Refer to QCS-21 Part 31, project drawings and addendum below)
17.1 Contractor to liaise with KAHRAMAA Material Section for latest specification as basis of
approval.

18.0 ELEVATOR (Refer to QCS-21 Part 20 that covers elevator items only if applicable to project.)

19.0 LIGHTNING PROTECTION SYSTEM (Refer to QCS-21 Part 21, project drawings and addendum
below)
19.1 The lightning protection shall be according to BS EN 62305.

20.0 EARTHING AND BONDING (Refer to QCS-21 Part 22 project drawings)

21.0 INSPECTION AND TESTING (Refer to QCS-21 Part 23)
22.0 DOCUMENTATION FORMAT (Refer to QCS-21 Part 24 and project documents)
23.0 ELECTRICAL IDENTIFICATION (Refer to QCS-21 Part 25)
24.0 BATTERY AND BATTERY CHARGER (Refer to QCS-21 Part 27 as applicable
25.0 SMALL ENCLOSURES (Refer to QCS-21 Part 28)
26.0 DUCT BANK AND MANHOLES (Refer to QCS-21 Part 30 but limited to electrical manhole only and as
per project drawing)

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A. FIRE PREVENTION SERVICES

1.0 GENERAL
1.1 Work Description
1.2 Documentation
1.3 Manufacturer and Installer Qualifications
1.4 Reference Standards
1.5 System Description

2.0 PRODUCTS
2.1 Optical Smoke sensors
2.2 Manual Call Points
2.3 Alarms
2.4 Wiring/Cables
2.5 Fire Alarm Control Panel

3.0 EXECUTION
3.1 Supervision
3.2 Workshop Drawings
3.3 Coordination
3.4 Labeling
3.5 Containment
3.6 Grounding
3.7 Installation
3.8 Testing & Commissioning
3.9 Training

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A. FIRE PREVENTION SERVICES

1.0 GENERAL

1.1 Work Description

A. The fire alarm system shall include furnishing, installation, and connection of the
Analog/Addressable Microprocessor based LCD/LED Fire Alarm Control Panel consisting
of system cabinet(s), main chassis with power supply, with or without UDACT dialer,
stand-by batteries, initiating and indicating, optional city tie/reverse polarity module,
optional relay modules of the proposed fire alarm devices which include smoke detectors,
manual alarm call points, bells, indicators and miscellaneous peripheral devices to the
proposed Fire Alarm Control Panel to form a complete coordinated system ready for
operation as shown on the drawings or herein specified.

B. The fire alarm system shall comply with requirements of NFPA Standard No. 72 for
protected premises signaling systems except as modified and supplemented by this
specification. The system field wiring shall be supervised electrically. The system and all
associated equipment shall be fully approved and listed by the following agency and
regulatory controls:

1. System:
a. Must comply with applicable National, State, and/or local Building code recognized
at time of installation.
b. Must comply with NFPA 101 70, 72 fire alarm installation standard recognized at
time of installation.
c. Installation must comply with requirements of Local Authority Having Jurisdiction.
d. Must be from a Single Manufacturer

1.2 Documentation

The following are the list of documentations required as minimum under this contract.

1.2.1 Material Submittal

Material submittal shall be comprehensive and shall include the following as minimum

1. System schematic diagram as proposed with specific reference to interoperability, describing

locations and types of detectors, manual call points, bells, horns, control panels, etc.
2. Brief description of system operation, functions and control sequences.
3. Schedule of all equipment with model number, names of manufacturers and country of origin
4. Product data sheets highlighting the selected model of proposed equipment. Product data
sheets of all components shall be submitted.
5. Software provider's license agreement stating limits on use, copying and transferring
software.
6. Copy of contract specifications complete with clause wise compliance statement.

1.2.2 Workshop Drawings

Lay out drawings complete with cable sizing, cable routing, containment sizing, location of
equipment, power requirements and data ports for system components, etc and installation
details of door hardware. Drawings shall also indicate requirements of back boxes, pull boxes,
access panels, data, power etc.

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1.2.3 As-built drawings

Submit number of sets of final as-built drawings as indicated in the contract documents
including the above items marked up with labels of each component.

1.2.4 Operation & Maintenance Manual

Descriptive data of all operating, user and application software including complete operators
manuals, programmers’ manuals, and alphanumeric point name convention sheet.

Provide final documentation to serve the diverse needs of personnel concerned with operation,
procurement, installation and maintenance.

Operation & Maintenance manuals shall be complete with preventive maintenance schedules,
procedures and troubleshooting procedures.

1.2.5 Training Manual

Shall include CV's of trainers, brief description of the installed system, preventive and
breakdown maintenance procedures and training mode.

Training agenda covering training mode, duration, number of trainees in each session etc. shall
be submitted at least three weeks prior to the training.

1.3 Manufacturer & Installer Qualifications

The system shall be engineered, commissioned and serviced by the manufacturer or

manufacturer's authorized systems integrator employing factory trained personnel for
commissioning and after sales support. Materials and equipment shall be the catalogued
products of manufacturers regularly engaged in production of access control equipment and the
products proposed shall be the latest versions commercially available at the time of the bid.

The manufacturer shall be ISO 9002 and ISO 9001 certified for Quality Assurance in
Production, Installation and Servicing.

The products shall comply too the requirements of NFPA 72 and approved by local Civil
Defense authorities and the installer shall have registration with Qatar Civil Defense.

The specialist shall obtain and submit a written undertaking from the manufacturer that the
spare parts of the system proposed will be made available upon request for at least 10 years
from the date of substantial completion. In addition, the manufacturer shall undertake to ensure
forward compatibility of the proposed equipment for at least 15 years

1.4 Reference Standards

A. Where applicable the fire detection and alarm system, and installation shall comply with
the following standards.

NFPA 231 - Storage, General.

NFPA 72E - Fire Detectors, Automatic.
NFPA 70 - National Electric Code.
NFPA 101 - Life Safety Code.

BS 5839 - Fire detection and alarm systems for buildings.

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BS 5839 Pt.1- Code of practice for system design, installation and testing.

BS 5839 Pt.2- Specification for manual call points.

BS 5839 Pt.4 - Specification for control and indicating equipment.

BS 5839 Pt.5 - Specification for optical smoke detectors.

BS 5445 - Components of automatic fire detection systems.

BS 7671 - Requirements for electrical installations.

Cables used for Fire Alarm System shall meet the following standards:

BS 6387 (Fire & Mechanical Tests),

IE C331 (Fire Test),
BS 4066-3 /IEC 332-3 (Flame Propagation,
BS 6425-2/IEC 754-2 (Acid Gas Emission Test)

Fire Alarm & Detection system shall be designed to conform to NFPA and the equipment’s &
devices shall be UL listed.

1.5 System Description

• The fire detection and alarm system shall be designed to facilitate accurate identification of
the source of heat / smoke / fire in their early stages to minimize occurrences of false alarms
due to faulty equipment, electrical transients, system faults etc.

• The fire alarm control panels shall make final decision on whether a fire or fault exists by
comparing the plotted patterns from a fire sensor against known fire and fault patterns held in
its memory. System shall be true Analogue addressable with the ability to print the output
from a fire sensor over a period of time.

• All system components and devices shall be connected to two-wire loop circuits (as shown in
the typical schematics) with each component having its own individual built-in isolator.
Removal or disconnection of any component from the loop shall not affect the functioning and
performance of other components and the system. Please note that the group isolators which
are used to isolate a section of a loop in case of fault is not acceptable.

• System shall be of safe addressable type i.e. all the devices on the loops of the FACP shall
be :

- allocated addresses automatically from the panel at the time of system power up on a
numerically lowest unused value basis (algorithms)
- and also given an address during commissioning, the value of which shall be stored in
non-volatile memory, within the electronics module of the outstation. This value shall be
read during loop allocation and provided it is valid shall be used to setup the outstations
primary address.

• Facilities shall be provided to constantly monitor and check the following circuits and fault
conditions:

o The power supply to the loop /s;

o For open-circuit, short-circuit, earth fault and any other fault condition in the loop
wiring;
o For communication failure and errors in all cards and loops
o For faults in keyboard and printer circuits
o monitoring of all devices status every 1.3 minutes to create a table of each 1
analogue channel for event analysis

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• All devices i.e., Optical Smoke Sensor, Fire Alarm Interface Units, sounders with strobe lights,
Manual Call Points, etc. shall be from a single manufacturer and UL listed. Connection for
Sounders and flashers shall be taken from the control module in the loop. Separate power
supply shall be given to control module for sounders and flashers.

• All devices shall be assigned a maximum of 32 character alphanumeric label. In case of fire,
fault or warning, the label of device sensing threshold shall appear on visual display unit of
the panel and shall have also the facility to extend the label up to 60 characters if required.

• Any correction in label shall have to be carried out from the built-in keyboard of FACP. Use of
separate PC or tools for on-site programming shall not be acceptable.

• Any event i.e. Fire, fault or warning shall be recorded with time, date and place of occurrence
in the memory of FACP. These events can either be displayed on VDU or printed, as
required.

• Provision shall be done at the fire alarm control panels to silence the alarm sounders and the
speaker circuits but the visual indication shall remain until the system is reset.

• It shall be possible to change the sensitivity of analogue sensors from fire alarm control panel
only.

• The sensitivity shall be varied automatically, if required, by time zoning feature whereby it
allows sensors to be programmed to respond at different sensitivities relative to any time of
day, and any day of week.

• Facility to introduce / change delay periods in operating loop (addressable) individual

sounders / group of sounders, shall be possible to program from FACP without the need to
change any hardware.

• The alarm verification feature shall be used to delay acceptance of alarms until they can be
confirmed, and shall meet all applicable code requirements and standards. Any or all circuits
may be selected for verification through field configuration, which shall be done without
removal of an EPROM. If a circuit is selected for alarm verification, it will only verify two-wire
smoke detectors. Contact devices, such as manual stations, connected to a verified circuit
will be discriminated and will not be verified.

• When the unit detects an alarm on an initiating circuit programmed for alarm verification, the
unit shall automatically reset the power to that circuit. If the alarm condition is still present
after a pre-set time period of 30 seconds, then the system will automatically enter the Alarm
mode.

• Each unit shall send commands to other units on the network based upon the priority of the
initiating signal. Alarm events/commands shall be sent before supervisory conditions, which
will be sent before commands for a Trouble condition.

• In case of a partial communications failure, each unit will continue to send commands to
those units it can still communicate with.

• Each unit will be able to work in a stand-alone mode in case of a total loss of network
communications.

• Any control unit in the network can be made the master unit of the network by software
changes only.

• Each control unit will have error detection, correction, and retransmissions to guarantee data
integrity.
• All the detectors above the false ceiling shall be with indicator lamps.

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1.5.1 Sequence of Operation

A. When a fire alarm condition is detected by one of the system initiating devices, the following
shall occur:
a. All automatic programs assigned to the alarm point shall be executed and the
associated indicating devices and relays activated.
b. The System Alarm on appropriate unit will indicate an alert condition.
c. The corresponding zone(s) in alert alarm will be indicated
d. Second stage operation shall occur when a key is inserted into the key-operated
switch of any manual pull station causing all fire alarm speakers/bells to sound the
general alarm (evacuation) at a rate of 120 strokes per minute throughout the
building.
e. If the fire alarm condition is not acknowledged at the unit within five (5) minutes of the
sounding of the first stage alarm, the fire alarm system shall automatically indicate a
second stage alarm causing all bells in the building to sound the general alarm
(evacuation) throughout the building. Activation of the second stage shall be
identified at the operator's workstation.
f. Activate all control by event functions related to the alarm
g. Send signal to U.L. Certified monitoring central station
h. Fan systems, i.e., shutdown, exhaust and pressurization operations to be initiated.
i. Doors with hold open devices shall be signaled to release
• When a trouble condition is detected by one of the system initiating or indicating circuits, the
following functions shall immediately occur:
a. System Trouble will be indicted on the unit and system annunciator(s).
b. A local trouble-sounding device in the unit and annunciator shall be activated. This sound
shall be distinct from the alarm sound.
c. The trouble for the corresponding initiating or indicating circuit shall be indicated on the unit.
d. The appropriate message will appear on the LCD display.
2.0 PRODUCTS (AS APPLICABLE)

2.1 Optical Smoke Detectors.

Optical smoke detectors shall be provided in areas as shown on drawings to the following
specification.

Optical smoke detectors shall be capable of detecting visible combustion gases emanating from
fires.

Optical smoke detectors shall have sensitivity sufficient to be classified as ‘B’ in BS 5445.

Optical smoke detectors shall work on forward scatter principle, using optical components
operating at a wavelength of 4.35nm.

Optical smoke detectors shall operate at 24 V d.c

Optical smoke detectors shall operate satisfactorily at an ambient temperature range of 5 deg.C
- 55 deg. C and maximum relative humidity of 95%.

Optical smoke detectors shall be protected to a minimum of IP44.

Optical smoke detectors shall incorporate screens designed to prevent insects from entering the
sensing chamber.

Optical smoke detectors shall have an internal alarm indicator.

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2.2 Intelligent Dual Heat Sensor

The Heat Sensor shall incorporate a highly linear thermistor circuit. A voltage is produced
proportional to temperature which shall be scaled, linearized and transmitted as an analogue
value.

The sensors software shall allow the device to operate as both a rate of rise sensor and or a
fixed temperature sensor. It shall be possible to de-select the rate of rise for specific locations.
The device shall compress with remote indicator output. The addressable code for the device
shall be stored in the sensor and be non-volatile. The programming of this code shall be
facilitated by a hand held device.

2.3 Intelligent Beam Sensors

The Beam Sensor shall incorporate a highly accurate electronics and be capable of monitoring
smoke spread. The sensor shall comprise of a emitter and receiver. The emitter shall generate
an infrared beam of light that can be monitored by the receiver. When this light source is
deflected by the obscuration of smoke the receiver shall generate an alarm. The sensor shall be
fully adjustable. Each device shall be adjusted by a qualified engineer, for optimum
performance. The addressable code for the device shall be stored in the sensor and be non-
volatile.

2.4 Addressable Monitor Module

The Monitor shall be designed to interface sprinkler flow switch and supervisory tamper switch.
All field wiring to be fully monitored for alarm and fault condition. The interface shall be
designed for 1st fix of back plate will all terminations and be free of all electronics. The
intelligent interface shall be installed at the commissioning stage. The addressable code for the
device shall be electronically programmed and stored in the sensor and be non-volatile. The
programming of this code shall be facilitated by a digital electronic hand held device.

2.5 Addressable Interface Module

The Interface shall have a relay inputs with NO and NC volt free contacts, these shall be
separately driven under the control of the fire alarm panel. The output relay shall be rated to
switch up to 1A 120V AC. A single input shall be provided with an open and short circuit
monitoring, which shall enable monitoring for confirmation signal that the plant under control
has operated. If the relay has not operated within a programmed period of time a specific fault
shall be generated.

The interface shall be designed for 1st fix of back plate will all terminations and be free of all
electronics. The intelligent interface shall be installed at the commissioning stage. The
addressable code for the device shall be electronically programmed and stored in the sensor
and be non-volatile. The programming of this code shall be facilitated by an digital electronic
hand held device.

2.5 Circuit Isolator

The short Circuit Isolator shall be installed at least every twenty devices and or each separate
fire zone and between floors. The circuit isolator shall be used to protect the installation wiring
in the event of a short in the cables. Should a fault occur the isolator shall automatically
disconnect the loop either side of the short, the control panel shall recognize this disconnection
and shall communicate in both directions. This process will enable a limited number of devices
to be off line whilst the fault is being investigated and repaired. Once the short is removed the

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isolators shall automatically reinstate the loop connection. The isolator shall incorporate an
LED, which illuminates when the short is detected on the loop circuit.

2.6 Addressable Remote Sensor Indicator

Remote Indicators shall be installed as shown on the drawings. The remote indicators shall be
addressable linked to any number of detectors within the given location. The remote indicator
shall be installed in a clearly identifiable location. The remote indicator shall fit onto a standard
electrical accessory box.

2.2 Manual Call Points.

The addressable manual call points shall monitor and signal to the fire alarm control panel the
status of a switch operated by a ‘break glass’ assembly.

The addressable manual call point shall meet the requirements of NFPA 72

The addressable manual call points shall be capable of operating under thumb pressure and
not require a hammer.

Manual call points shall operate at 24V DC

Manual call points shall be installed according to the guidelines of NFPA 72, inside of each
exits, including the office blocks.

Manual call points shall have IP 56 protection.

Manual call points shall have an internal alarm indicator.

2.3 Audible and Visual Alarms

Alarm audible and visual signal devices shall operate from the SHP Control Panel.

The Alarm Bell, Alarm Horn and Horn/Strobe devices shall operate on 24 volts Dc power to
allow supervision of the circuit wires.

The alarm bell and horn shall deliver a minimum sound level of 92 decibels at a distance of 3m.

Horn and strobe light are to operate simultaneous from one power supply with flash rate of 1-3
flashes per second minimum over the listed input voltage range.

A Strobe device shall be placed outside, and above, each exit door from the protected space.
Provide an advisory sign at each light location.

2.4 Graphical Monitoring Centre

The graphical monitoring center shall pictorially represent Fire, Fault, Action and Disable events
on a monitor display. The purpose of this facility shall be to provide the user with the additional
visual information. The system shall operate on the Windows environment and required to have
full control or monitor, up to 8 users with multi-level password control, user friendly, direct and
complete user graphics view interface, switching between device layouts of different monitoring
zones. Pop out layout of abnormal information automatically. Flash the abnormal device(s) in
different colors’ for alarm, action, fault and isolation.

2.4 Wiring / Cables.

Wiring of the fire alarm system shall be fire resistant cable through PVC conduits.

Connections from the industrial modem to the PC based monitor at the Fire control center shall
be carried out using standard telecommunication cables.
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Cables and wire entries to the fire control panel and associated devices shall be fitted with
glands or grommets to prevent possible damage to the insulation.

All cables from the fire control panel to the detection and alarm devices shall be clearly labeled.

The fire alarm system mains power isolating switch shall be colored RED and clearly labeled
“FIRE ALARM,, DO NOT SWITCH OFF”.

All cabling and wiring shall be tested before they are connected to the fire control panel and its
associated devices.

2.5 Fire Alarm Control Panel (Intelligent Addressable Type)

The FACP shall incorporate a number of features to allow easy operation through a user-friendly
menu. It shall have a Graphical LCD display and non-tactile membrane type switches/keypad in
durable plastic. For reliability it shall have it’s own on-board circuit protection and multiprocessor
architecture. The keypad shall include means to enter of two minimum level passwords to prevent
unauthorized manual control. The system shall be on and off-site programmable by using the
keypad and, also by connecting a PC to the communication port on the main processor/display
board.

The FACP shall be fully configurable and expandable at the owner’s site without the need for
handheld programmer. All the configurations shall be done by the control panel.

The FACP shall be of modular construction, capable of monitoring 10 monitored detection loops
and shall have repeated code facility to learn if the loop have duplicated address. Each loop shall
be capable to accommodate a minimum of 242 addressable devices.

Each loop length maximum 1.2Km

Detectors (Smoke, heat, flame), manual call points, modules, sounder strobe shall be connected on
the same two wire loop.

Each device and zone shall have its own 40 character text message allocation; also each device
shall be linked to a software zone. Can be edited the device detailed and type, sensitivity and
address on the control panel.

The FACP shall be capable of a minimum of 140 zone indications per panel and have 3 common 1-
amp rated sounder circuits and 2 common 1-amp rated auxiliary relay contacts. The panel shall
have an internal event printer; this shall be mounted within the same enclosure. The printer shall
have the facility to be programmed to print alarms only; failure of the printer must not affect any
other part of the system.

The FACP shall have a one man walk test facility to periodically test the detectors without having to
continually manually reset from the panel. The test feature shall have silent mode option.

The FACP shall automatically program to switch the sounders to Day/Night mode whereby any
alarm condition is recognized outside normal hours shall provide an evacuation signal throughout
the entire premises.

The FACP shall have internal memory lock to prevent unauthorized data entry and shall also have
2000-memory event log for system information and shall be stored in non-volatile memory.

The FACP shall have the facility to networking on RS485 to other panels and repeaters, while
communication to color graphics shall be via RS232.

Alarm and faults shall be indicated as for a fire alarm via the LCD along with an associated LED
and printer. A buzzer shall sound in the event of an alarm, pre-warning of fault.

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The FACP shall have verification facility to delay acceptance of alarms until they can be confirmed,
and shall meet the applicable standard. All the devices in the zone can be configuring for
verification through the panel. Manual call point or contact devices connected to a loop will be
separated and will not be verified.

The Batteries and charger shall maintain the entire system, plus 20% for a minimum period of 24
hours stand-by in the event of mains failure. After 24 hours has elapsed the system shall be
capable of initiating a full global alert and evacuate for a minimum period of 30 minutes.

The network shall be peer to peer with each panel generating command to other panel as required.
The network shall be class A wiring up to 1.2Km between two panels.

Each control panel shall operate independently by performing its own specific control, alarm
supervision and history gathering. The system which requires master or slave is not acceptable.

3.0 EXECUTION

3.1 Supervision

All works associated with implementation of the fire alarm system shall be carried out under the
direct supervision of a representative of the approved specialist systems integrator. Installations
shall be carried out by skilled technicians.

3.2 Workshop Drawings

Detailed engineering shall be the carried out by a factory trained engineer working with the
approved specialist systems integrator. Workshop drawings shall detail all cable types,
conduits, back box/power requirements, mounting details etc. Workshop drawings submitted for
THE ENGINEER approval shall be duly signed and stamped by the specialist systems
integrator. Detailed system schematic diagram showing cable sizes and types, exact locations
of devices, server, workstations etc. shall be submitted along with the workshop drawings.

3.3 Coordination

The supervisor of installation shall be fully responsible for coordination with specialists
integrators of other systems to which the system has an interface or integration.

3.4 Labeling
A labelling scheme shall be submitted for approval of THE ENGINEER. All cables and devices
shall be labelled to the approved scheme.

3.5 Containment

All wires and cable shall be installed in GI conduits or metallic cable trays. Sizing of
containment shall be carried out during detailed engineering to be carried out by the specialist.
Containment shall be sized such that a 25% spare capacity is available for any modifications to
the system after handing over.

3.6 Grounding

Each piece of electronic equipment shall be properly grounded before energising. All wire
shields shall be grounded at the hub end only, not at the remote or device end. Ground system
components & conductor & cable shields to eliminate shock hazard & to minimize ground loops,
common-mode returns, noise pickup, cross talk, & other impairments.

3.7 Installation

1. Conduit:

a. Conduit shall be in accordance with The National Electrical Code (NEC), local and
state requirements.
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b. All wiring shall be installed in conduit or raceway, unless otherwise indicated on

drawings. Conduit fill shall not exceed 40% fill as per NEC. Conduit size shall be ¾
inch minimum.
c. Wiring for 24 volt control, alarm notification, emergency communication and similar
power-limited auxiliary functions shall be installed as per the manufacturer’s
installation requirements
d. Conduits shall not enter the Fire Alarm Control Panel, except where conduit entry is
specified by the manufacturer.
e. Cable must be separated from any open conductors of Power, or Class 1 circuits,
and shall not be placed in any conduit, junction box or raceway containing these
conductors, as per NEC Article 760-29.

2. Wire:

a. All wiring shall be in accordance with local, state and national codes (e.g., NEC
Article 760) and as recommended by the manufacturer of the fire alarm system.
Number and size of conductors shall be as recommended by the fire alarm system
manufacturer
b. Wire and cable not installed in conduit shall have a fire resistance rating suitable for
the installation as indicated in NFPA 70. All field wiring shall be completely
supervised.
c. The Fire Alarm Control Panel shall be connected to a separate dedicated branch
circuit, maximum 20 amperes. This circuit shall be labelled at the Main Power
Distribution Panel as FIRE ALARM. Fire Alarm Control Panel Primary Power wiring
shall be 12 AWG. The Control Panel Cabinet shall be grounded securely to either a
cold water pipe or grounding rod.

1. General Installation:

a. Installation shall conform to the wiring diagrams submitted as shop drawings and to
the manufacturer’s instructions.
b. Installation of equipment, devices, wire and cable terminations, programming,
adjusting, testing and demonstration shall be performed by an qualified installer to
perform fire alarm system work. Final connections shall be made under the
supervision of an authorized manufacturer representative.

3.8 Testing and Commissioning

All tests shall be carried out according to a detailed procedure duly approved by THE
ENGINEER. The tests shall be carried out in phases.

Cables are to be tested for any damage occurred during transportation to site and/or during the
course of pulling-in and laying.

Pre-testing: Upon completing installation of the system, align, adjust and balance the system
and perform complete pre-testing. Determine, through the pre-testing, the conformance of the
system to the requirements of the drawings and specifications. Correct deficiencies observed in
pre-testing. Replace malfunctioning or damaged items with new & retest until satisfactory
performance & conditions are achieved. Prepare forms for systematic recording of acceptance
test results.

Report on Pre-testing: After pre-testing is complete, provide a letter certifying the installation is
complete and fully operable, including the names and titles of the witness to the preliminary
tests.

Final test notice: Provide a 10-day minimum notice in writing when the system is ready for final
acceptance testing.

Resetting: Correct deficiencies indicated by tests and completely retest work affected by such
deficiencies. Verify by the system test that the total system meets the specifications and
complies with the applicable standards.

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3.9 Training

Engage a factory-authorized service representative, whose credentials are approved by THE

ENGINEER, to explain programming and operation of system and to train Employer's
maintenance personnel on procedures and schedules for maintaining, programming, operating,
and adjusting, troubleshooting, and servicing system.

Training shall be carried out to an approved training manual Separate training shall be provided
on the hardware and software. Each training shall have both class room session and hands on
session. Contractor shall allow for 6 trainees each in both the trainings.

------ End of Section -----

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B. DATA/VOICE SYSTEM

TABLE OF CONTENTS

1 GENERAL

1.1 Work Description

1.2 Documentation
1.3 Manufacturer and Installer Qualifications
1.4 Reference Standards
1.5 System Description and Requirements

2 PRODUCTS

2.1 RJ-45 Outlet

2.2 Shielded modular RJ-45 jack
2.3 Modular jack termination tooling
2.4 Faceplate
2.5 Back boxes
2.6 Floor box outlet
2.7 Shielded Cat6A cable
2.8 Patch panel in floor distribution
2.9 Backbone cabling
2.10 Fiber backbone panel
2.11 Floor mounted data cabinet

3 PATCH CORD CABLE ASSEMBLIES

3.1 Copper Cable Assemblies

3.2 Fiber Cable Assemblies

4 EXECUTION

4.1 Supervision
4.2 Workshop Drawings
4.3 Coordination
4.4 Cabling System Testing
4.5 Grounding and Bonding
4.6 Labeling
4.7 Warranty
4.8 Cabling System Acceptance
4.9 Final Inspection
4.10 Test Verification
4.11 Final Acceptance
4.12 Training

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B. DATA/VOICE SYSTEM

1.0 GENERAL

1.1 Work Description

This section describes the basic requirements for the supply, installation, testing and commissioning
of fully functional IT system network for the project. This shall include horizontal cabling & backbone
fiber optic cabling for data/voice, CCTV, access control and IPTV systems.

The system is to be supplied with all equipment, hardware, software, cabling and ancillary services as
required to provide an integrated system complete and functional in all respects. The tenderers are to
familiarize themselves with all matters related to such requirement and to account for such in the
tendered price.

It is the responsibility of the tenderer to obtain clarification of all matters in which doubt exists as to
the exact intent of this document or in which a conflict appears to have arisen. Such information must
be obtained before the closing and lodging of tenders.

The response shall clearly detail all pricing for components, cabling, installation, engineering, training,
commissioning, setting to work, and 12 months comprehensive warranty.

1.2 Documentation

The following are the list of documentations required as minimum under this contract.

1.2.1 Material Submittal

Material submittal shall be comprehensive and shall include the following as minimum

Brief description of system operation, functions and control sequences.

Schedule of all equipment with model number, names of manufacturers and country of origin

Product data sheets highlighting the selected model of proposed equipment. Product data sheets of
all components shall be submitted.

Software provider's license agreement stating limits on use, copying, and transferring software.

Copy of contract specifications complete with clause wise compliance statement.

1.2.2 Workshop Drawings

Lay out drawings complete with cable sizing, cable routing, containment sizing, location of
equipment, power requirements and data ports for system components, etc and installation details of
door hardware. Drawings shall also indicate requirements of access panels, data, power etc.

1.2.3 As-built drawings

Submit number of sets of final as-built drawings as indicated in the contract documents including the
above items marked up with labels of each component.

1.2.4 Operation & Maintenance Manual

Descriptive data of all operating, user and application software including complete operators
manuals, programmer’s manuals, and alphanumeric point name convention sheet.
Provide final documentation to serve the diverse needs of personnel concerned with operation,
procurement, installation and maintenance.

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Operation & Maintenance manuals shall be complete with preventive maintenance schedules,
procedures and troubleshooting procedures.

1.2.5 Training Manual

Shall include CV's of trainers, brief description of the installed system, preventive and breakdown
maintenance procedures and training mode.

Training agenda covering training mode, duration, number of trainees in each session etc. shall be
submitted at least three weeks prior to the training.

1.3 Manufacturer & Installer Qualifications

The system shall be engineered, commissioned and serviced by the manufacturer or

manufacturer's authorized systems integrator employing factory trained personnel for
commissioning and after sales support. Materials and equipment shall be the catalogued products
of manufacturers regularly engaged in production of access control equipment and the products
proposed shall be the latest versions commercially available at the time of the bid.

The manufacturer shall be ISO-9002 and ISO 9001 certified for Quality Assurance in Production,
Installation and Servicing.

The specialist shall obtain and submit a written undertaking from the manufacturer that the spare
parts of the system proposed will be made available upon request for at least 10 years from the
date of substantial completion. In addition, the manufacturer shall undertake to ensure forward
compatibility of the proposed equipment for at least 15 years

1.4 Reference Standards

The cabling system described in this specification is derived in part from the recommendations
made in industry standard documents. The lists of documents below have bearing on the desired
cabling infrastructure are incorporated into this specification by reference:

1) This Technical Specification and Associated Drawings

2) TIA/EIA-568-B Commercial Building Telecommunications Cabling Standard, April 2001
3) ISO/IEC 11801 Second Edition
4) TIA/EIA 568-B.2-1 Performance Specification for 4-Pair 100 Ohm Category 6A
5) TIA/EIA 568-B.3 addendum 1
6) TIA/EIA-569-A Commercial Building Standard for Telecommunications Pathways and
Spaces - February, 1998
7) TIA/EIA-606 Administration Standard for the Telecommunications Infrastructure of Commercial
Buildings - February, 1993
8) TIA/EIA-607 Commercial Building Grounding and Bonding Requirements for Telecommunications
- August, 1994
9) Building Industries Consulting Services, International (BICSI) Telecommunications Distribution
th
Methods Manual (TDMM) – 9 edition

If a conflict exists between applicable documents, then the order in the list above shall dictate the
order of precedence in resolving conflicts. If this document and any of the documents listed above
are in conflict, then the more stringent requirement shall apply.

1.5 System Description and Requirements

The structured cabling network specified under this section includes providing complete IP solution
connectivity and cabling required for data & voice, CCTV, access control & IPTV systems as per
network schematics. Active equipment like switches, routers etc. required to achieve this
connectivity will be provided by the specialist employed by the contractor for ‘Ethernet LAN’. The
telephone sets will be procured and installed by the client outside this contract.

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1.5.1 The Structured Cabling Network

The structured cabling network shall be based on single-manufacturer solution for the Category 6A
and Fiber Optic (FO) System systems.

The Category 6A and FO systems shall be backed by the manufacturer 25-Year System
performance warranty. The system warranty shall be facilitated by the SCS CONTRACTOR and be
established between the Manufacturer and the Customer.

The warranty will cover the components and labor associated with the repair/replacement of any
defective link within the warranty period, when the defect is a valid warranty claim.

1.5.2 Horizontal Cabling Product Specifications

The horizontal cabling shall be based on Shielded Cat6A or higher category components. The
horizontal cabling system must be tested and warranted for cat6A performance in compliance
with the latest draft standard TIA/EIA 568B-10 or ISO/IEC 11801 for Class Ea that will be
available at the time of the system testing.

1.5.3 The Structured Cabling system (SCS) contractor qualification criteria

The SCS Contractor shall be eligible to requesting the manufacturer 25-Year system Performance
warranty on the Installed systems. Copy of a valid agreement or certification letter shall be
included in the tender documents.

1.5.4 Special Requirements

Q-TEL may require work to be executed on the reinstallations during the period of the Contract;
the Contractor shall afford all facilities to Q-TEL’s contractors or workmen until their diversion
work is complete. The Contractor shall co-ordinate the work of Q-TEL and his own activities
and when necessary shall amend his program of work to suit all requirements of Q-TEL in
connection with their diversion work and keep the Engineer informed in writing of all
arrangements made.

2 PRODUCTS

All components of the proposed system shall be from one of the approved manufacturers. In the
event of unavoidable use of a third party product, the base manufacturer shall undertake the
responsibility for the same and include the said third party component in the 20 year certification.

2.1 RJ 45 Outlets

Each Category 6A cable shall be terminated on an 8-position, 8-conductor Category 6A Jack to the
T568B color code. The outlet plate, unless otherwise noted, shall be dual port, mounted to a single
gang box, surface mount box, and/or floor box.

Back boxes/floor boxes must be supplied by others. Floor boxes, if required, will include any
necessary mounting plates.

All RJ45 outlets will be fitted with spring loaded sliding shutters to prevent ingress of dirt and dust.

2.2 Shielded Modular RJ45 Jack

Modular jacks shall be constructed with a housing of polyphenylene oxide, 94V-0 rated. Modular
jacks shall be terminated using a 110-style pc board connector (made of 94V-0 rated
polycarbonate), color-coded for both T568A and T568B wiring. The 110 connector shall terminate

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22-26 AWG solid or 20-26 AWG stranded conductors with a maximum insulation diameter of .050
inches.

The modular jack contacts shall be plated with a minimum of 50 micro inches of gold in the contact
area and a minimum of 150 micro inches of tin-lead in the solder area over a 50 micro inch
minimum nickel under plate.

Modular jacks shall be compatible with panel thicknesses of .058” - .063”. Modular jacks shall snap
into a .790" X .582" opening.

Modular Jack shall be shielded with Copper zinc alloy 260, pre-plated with bright nickel.

Modular jack shall be terminated to T568B wiring code.

2.3 Modular Jack Termination Tooling

Termination of Modular jacks at every Outlet shall be completed using a hand tool which employs a
fully repeatable, self-centering, non-impact mechanical termination process. This process shall
simultaneously cut and terminate all 8 conductors to the modular jack, ensuring consistent Quality
termination at lesser expertise at the site.

Termination using 110 Punch Down tool is not accepted

2.4 Faceplate

Drywall faceplates are to be white plastic and flush mounted. Faceplate shall be UK size standard
single gang 1 or 2-Port angled with shutters, or double gang 3 or 4-port angles with shutters.

2.5 Back Boxes

These shall be supplied by others. Back boxes should be UK size standard, and of a sufficient
depth of 2 inches minimum as to allow the jack and terminated cable to be installed, without
exceeding the manufacturers recommended cable bend radius.

Back Boxes shall be supplied by others.

2.6 Floor box outlet

The floor box shall provide sufficient depth of 2 inches minimum as to allow the jack and
terminated cable to be installed, without exceeding the manufacturers recommended cable bend
radius.

Floor box shall support minimum of 2 jacks and 2 power sockets.

Floorbox shall be supplied by others.

2.7 Shielded Cat 6A Cable

The cable shall be 4-pair F/FTP (each individual pair in Metal Foil with overall Foil around the 4
pairs) construction with 23 AWG solid wires and a white jacket. Cable shall be supplied on
wooden reels.

Cable cross Outer Diameter shall be less than 7.30 mm to provide optimized conduit filling ratio

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The Horizontal Shielded Cable shall meet the minimum Performance Characteristics as below
cable

Freq. Attn. ACR PSNEXT PSELFEXT RL

Typ. Typ. Min. Typ. Min. Min. Typ.

MHz dB dB dB dB dB dB dB

1 2 91 75 90 85 20 23

4 3.7 89.3 75 90 82 23 25

10 5.9 87.1 75 90 80 25 30

16 7.4 85.6 75 90 78 25 30

20 8.3 84.7 75 90 76 25 30

31.25 10.4 82.6 75 90 74 23.6 30

62.5 14.9 78.1 72.5 90 72 21.5 30

100 18.5 74.5 69.4 90 67 20.1 30

200 26 64 64.9 87 53 18 25

250 29.5 60.5 63.4 87 51 17.3 23

300 32 54 62.2 83 48 17.3 22

450 43 39 59.6 79 42 17.3 19

600 48 28 57.7 73 36 17.3 18

The Cable shall be third party verified for compliance with ANSI/TIA/EIA 568-B.2-1 or IS0/IEC
11801 for Cat6A (or Higher category) transmission performance Standard.

2.8 Patch Panel in Floor Distributor

RJ45 patch panels shall be used for termination of all horizontal cables from data outlets on the
equipment side. Patch panels shall be of high density type and shall be available with different
number of ports – 12, 24 and 48. Specialists shall select patch panels as per requirement in each
telecom room, but with at least 20% spare for future addition of outlets. Height of a 48 port module
shall not exceed 2U (rack unit)

Patch panels shall be complete with cable holder back plate, front panel with individual shutter for
each port, label holder for each port & a label holder for the patch panel itself

The construction shall be simple and allow accessibility to non-technical personnel to control line
moves and re-arrangement of communication circuits.

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The system shall ensure reliable, gas-tight connections for data / voice communications as well as
for other low voltage circuit applications.

The Panel shall be wired in accordance with the T568B color code and supplied with grounding
volt.

2.9 Backbone Cabling

Fiber optic backbone shall connect the data cabinet from ground floor telecom to first floor telecom
room.It is the SCS responsibility to ensure that all FO backbone links are correctly polarized in
order to have a transmit fiber at one end connected to a receive fiber at the other end of a Link.
These cables shall be of diameter 50/125 microns or 62.5/125(core/cladding) and shall be suitable
for 1300 to 1550 nm wavelength window. Fiber Optic cores shall be color coded in accordance with
TIA/EIA-568-B. Following matrix gives the minimum technical characteristics expected from the MM
FO cables.The structure shall be tight buffer type and cable shall be reinforced with coated glass
fiber. Outer jacket shall be of LSOH Polyethylene outer jacket. Other features shall be the following:
Secondary coating shall be 900 um, Maximum allowable tension: 1000 N, External diameter: 7mm,
Operating temperature: 0°C to +60°C. Minimum bending radius shall be 100mm. The cable shall
have a crush resistance: 300N/cm. Cable shall be marked with name of manufacturer, type of
cable, reference number etc. at regular intervals.

Value
Characteristics
Core diameter 50/62.5 ± 0,5 µm

Cladding diameter 125 ± 2 µm

Attenuation
λ = 850 nm
≤ 3 dB/Km
λ = 1300 nm
≤ 1 dB/Km

2.10 Fiber Backbone panel

Fiber optic cable shall be terminated in fiber optic patch panel in rack cabinet at telecom room
located in each floor.

The optical fiber enclosure shall be 24-port, 19” rack mount enclosures, 1U, with drawer sliding
mechanism providing protection to the terminated fibers.

The optical fiber enclosure(s) shall each be capable of containing up to 12 SC Duplex connectors
in a 1U enclosure.

The fiber optic enclosure shall enclose all the required terminations and the wiring management
accessories for direct termination or for splicing.

2.11 Floor-Mounted Data Cabinet

All data patch panels – copper and fiber shall be housed in 19” equipment cabinet complete with
glass front lockable door with provision for air circulation, Steel rear door, Jacking Feet, and with
horizontal cable managers and 2 Vertical cable managers. The cabinet shall be of standard size,
as mentioned in the schematics.

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The floor-mount cabinet shall be supplied with 4-fan module (or 2x 2-fan modules). The cabinet
shall be supplied with castor group and 6 way power distribution frame.

The floor-mount cabinet shall be grounded by the SCS CONTRACTOR using a minimum # 6 AWG
copper conductor (supplied by the SCS CONTRACTOR) bonded to the ground bus (supplied by
others).

Cabinet shall be securely attached to the concrete floor.

3 PATCH CORD CABLES ASSEMBLIES

3.1 Copper Cable Assemblies

SCS CONTRACTOR shall provide cable assemblies at the Floor Distributor (FD)/ data cabinets
and at the data outlets (DO).

The cable assemblies shall be 4-pair RJ45/RJ45 FTP and must be factory terminated. Fielded
Terminated Cable assemblies are not accepted.

The Cable Assemblies shall carry the manufacturer warranty and application assurance for 10GBT
according to IEEE 802.3an.

The SCS CONTRACTOR shall provide 50% of the total number of Horizontal Outlets as per the
below length:

- At the DO, the cable assembly shall be 10ft

- At the FD the cable assembly shall be 3ft to 16ft to the best design in order to avoid excessive
cord length.

3.2 Fiber Cable Assemblies

SCS CONTRACTOR shall provide cable assemblies at the Floor Distributor (FD) and at the server
room. Optical fiber cable assemblies shall be provided to patch the network equipment to the
backbone fiber.

Fiber Patch cords shall be Duplex Multi-mode SC/LC unless otherwise is required as per the LAN
analyzers switch ports. The connectors shall be fully contained in a protective metal modular
housing.

The SCS CONTRACTOR shall provide 50% of the total fiber Optic cable density at the FD or the
DC: e.g. for 12-core cable, the SCS shall provide 3 Duplex fiber patch cords at each cable end ( 3
Patch cords at FD and 3 Patch Cords at DC).

Fiber Patch cords shall be 10ft (3m) length unless different lengths are required as per the final
design equipment/rack distribution and layout.

4 EXECUTION

4.1 Supervision

All works associated with implementation of the data/voice system shall be carried out under the
direct supervision of a representative of the approved specialist systems integrator. Installations
shall be carried out by skilled technicians.

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4.2 Workshop Drawings

Detailed engineering shall be the carried out by a factory trained engineer working with the
approved specialist systems integrator. Workshop drawings shall detail all cable types, conduits,
back box/power requirements, mounting details etc. Workshop drawings submitted for THE
ENGINEER approval shall be duly signed and stamped by the specialist systems integrator.
Detailed system schematic diagram showing cable sizes and types, exact locations of devices,
server, workstations etc. shall be submitted along with the workshop drawings. Detailed lay out of
the security control room complete with equipment console and furniture shall be submitted
separately for THE ENGINEER approval.

4.3 Coordination

The supervisor of installation shall be fully responsible for coordination with specialist’s integrators
of other systems to which the system has an interface or integration.

4.4 Cabling system Testing

All cables and termination hardware shall be 100% tested by the SCS CONTRACTOR for defects
in installation and to verify cable performance under installed conditions. All conductors of each
installed cable shall be verified useable by the SCS CONTRACTOR prior to system acceptance.
Any defect in the cabling system installation including but not limited to cable, connectors, feed-
through couplers, patch panels, and connector blocks shall be repaired or replaced in order to
ensure 100% useable conductors in all cables installed. All cables shall be tested in accordance
with this document and best industry practices. If any of these are in conflict, the SCS
CONTRACTOR shall be responsible to bring any discrepancies to the attention of the project team
for clarification and/or resolution.

4.4.1 Horizontal cabling

Horizontal Copper Links shall be performance verified using cable analyzer. Test results shall be
automatically evaluated by the equipment, using the most up-to-date criteria from the ANSI/TIA/EIA
–568-B.2.10 or ISO/IEC11801 for Class Ea Standard, and the result shown as pass/fail. Test
results shall be printed directly from the test unit or from a download file using an application from
the test equipment manufacturer. The printed test results shall include all tests performed, the
expected test result and the actual test result achieved

Copper Horizontal Cabling shall be tested u in a “Channel” or “Permanent” testing configuration.

4.4.2 Performance Verification

Horizontal link shall be performance verified using an automated test set. This test set shall be
capable of testing for the continuity and length parameters defined above, and provide results for
the following tests:

a. Length
b. Continuity
c. Near End Cross-Talk (NEXT)
d. Attenuation
e. Attenuation to Cross-Talk Ratio (ACR)
f. Power Sum NEXT
g. Power Sum ELFEXT
h. Return Loss
i. Propagation Delay and Skew
j. AXT (Alien Cross Talk) testing is optional for the F/FTP cable.

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The test should provide the shield continuity.

Test results shall be automatically evaluated by the equipment, using the most up-to-date criteria
from the ANSI/TIA/EIA –568-B.2.10 or ISO/IEC11801 for Class Ea Standard, and the result shown
as pass/fail. Test results shall be printed directly from the test unit or from a download file using an
application from the test equipment manufacturer. The printed test results shall include all tests
performed, the expected test result and the actual test result achieved

The test equipment shall be configured on “Channel” link testing.

List of Approved test equipment manufacturer

- Fluke DTX 1800

- Agilent WireScope Pro Hand Held Tester
Note: Test equipment should be factory-calibrated every 2year period.

4.4.3 Fiber Optic Testing

Each fiber strand shall be tested for attenuation with an optical power meter and light source or an
OTDR.

4.4.4 Attenuation

Test set-up and performance shall be conducted in accordance with ISO/IEC 14763-3 standard.
Test results evaluation for the panel to panel shall be based on the values set forth in ISO/IEC
14763-3 standard.

Attenuation testing shall be performed with a reference launch condition 2m patch cord to attach
the test equipment to the cable plant. The light source shall be left in place after calibration and the
power meter moved to the far end to take measurements. Maximum attenuation for installed
cables shall be evaluated based on the following formula:

Link Att= 2x0.2dB + ∑cable loss + ∑splice loss + ∑embedded connector loss

Cable Loss: Multi-mode at 850nm =3.5 dB/km

Cable Loss: Multi-mode at 1300nm =1.5 dB/km

Embedded Connector Loss =0.75 dB

4.5 Grounding and Bonding

The facility shall be equipped with a Telecommunications Bonding Backbone (TBB). This
backbone shall be used to ground all telecommunications cable shields, equipment, racks,
cabinets, raceways, and other associated hardware that has the potential for acting as a current
carrying conductor. The TBB shall be installed independent of the buildings electrical and building
ground and shall be designed in accordance with the recommendations contained in the IEC 60364
and ISO/IEC 14763-2 standards.

The main entrance facility/equipment room in each building shall be equipped with a
telecommunications main grounding bus bar (TMGB). Each telecommunications closet shall be
provided with a telecommunications ground bus bar (TGB). The TMGB shall be connected to the
building electrical entrance grounding facility. The intent of this system is to provide a grounding
system that is equal in potential to the building electrical ground system. Therefore, ground loop

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current potential is minimized between telecommunications equipment and the electrical system to
which it is attached.

4.5.1 Product Specifications

All racks, metallic backboards, cable sheaths, metallic strength members, splice cases, cable trays,
etc. entering or residing in the FD or ER shall be grounded to the respective TGB or TMGB using a
minimum #6 AWG (4.1mm) stranded copper bonding conductor and compression connectors.
Where metallic panels attached to the rack to not have sufficient metal to metal contact to provide
an adequate path to ground, they shall be bonded to the rack using a minimum #14 AWG (1.6mm)
copper conductor. The copper conductor size shall be upgraded based on the largest power
conductor feeding any rack mount equipment. The conductor shall be continuous; attaching all
isolated components in a daisy chain fashion from top to bottom and bonded to the rack using an
appropriate compression connector.

All wires used for telecommunications grounding purposes shall be identified with a green
insulation. Non-insulated wires shall be identified at each termination point with a wrap of green
tape. All cables and bus bars shall be identified and labelled in accordance with the System
Documentation Section of this specification.

4.5.2 Ground System Installation

The TBB shall adhere to the recommendations of the IEC 60364 and ISO/IEC 14763-2 standards,
and shall be installed in accordance with best industry practices. A licensed electrical contractor
shall perform installation and termination of the main bonding conductor to the building service
entrance ground, at a minimum.

4.6 Labeling

The SCS CONTRACTOR shall develop and submit for approval a labeling system for the cable
installation. The Customer will negotiate an appropriate labeling scheme with the successful SCS
CONTRACTOR. At a minimum, the labeling system shall clearly identify all components of the
system: racks, cables, panels and outlets. Racks and patch panels shall be labeled to identify the
location within the cabling system infrastructure. All labeling information shall be recorded on the
as-built drawings and all test documents shall reflect the appropriate labeling scheme.

All label printing will be machine generated using indelible ink ribbons or cartridges. Self-
laminating labels will be used on cable jackets, appropriately sized to the OD of the cable, and
placed within view at the termination point on each end. Outlet shall be labeled on the space
provided on the faceplate.

4.7 Warranty

The SCS CONTRACTOR shall facilitate the 25-year Cat6A System Performance warranty and FO
cable 25-Year Component warranty between the manufacturer and the Customer. Horizontal links
shall be warranted against the link performance minimum expected results defined in
ANSI/TIA/EIA-568-B.2-10 or ISO/IEC11801 latest edition Class Ea. Fiber optic cable shall be
warranted against the performance minimum expected results defined in TIA/EIA-568-B.1.

4.8 Cabling system Acceptance

The Customer’s Technical Representative will make periodic inspection of the project in progress.
One inspection will be performed at the conclusion of cable pulling, prior to closing of the false

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ceiling, to inspect the method of cable routing and support. A second inspection will be performed
at completion of cable termination to validate that cables were dressed and terminated in
accordance with ANSI/TIA/EIA or ISO/IEC 100801 specifications for jacket removal and pair
untwist, compliance with manufacturer’s minimum bend radius, and that cable ends are dressed
neatly and orderly.

4.9 Final Inspection

Upon completion of the project, The Customer’s Technical Representative will perform a final
inspection of the installed cabling system with the SCS CONTRACTOR’s Project Foreman. The
final inspection will be performed to validate that all horizontal and backbone cables were installed
as defined in the drawing package, and that the installation meets the aesthetic expectations of the
Customer.

4.10 Test Verification

Upon receipt of the test documentation, The Customer reserves the right to perform spot testing of
a representative sample of the cabling system to validate test results provided in the test
document. Customer testing will use the same method employed by the SCS CONTRACTOR, and
minor variations will be allowed to account for differences in test equipment. If significant
discrepancies are found, the SCS contractor will be notified for resolution.

4.11 Final Acceptance

Completion of: the installation; in-progress and final inspections; receipt of the test and as-built
documentation will constitute acceptance of the system.

4.12 Training

If required, the SCS CONTRACTOR will provide training for Customer’s qualified staff to ensure
knowledge transfer regarding the usage of the cabling infrastructure. The SCS CONTRACTOR
shall provide minimum of 12 hours training to the Customer appropriate staff to explain and orient
the staff on how to use and maintain the cabling plant

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C. CCTV SYSTEMS

1.0 GENERAL
1.1 Work Description
1.2 Documentation
1.3 Manufacturer and Installer Qualifications
1.4 Reference Standards
1.5 System Description and Requirements
1.6 Design criteria

2.0 PRODUCTS
2.1 IP Fixed camera
2.2 IP Dome camera
2.3 PTZ Dome camera
2.4 Network Storage
2.5 Operator Workstation
2.6 Monitor
2.7 Video wall workstation
2.5 Control Room
2.6 Networking Component

3.0 EXECUTION
3.1 Supervision
3.2 Workshop Drawings
3.3 Coordination
3.4 Labeling
3.5 Containment
3.6 Grounding
3.7 Testing & Commissioning
3.8 Training

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C. CCTV

1. GENERAL

1.1 DESCRIPTION OF WORK

This section describes the basic requirements for the supply, installation, testing and
commissioning of fully operational CCTV for the project.

The system is to be supplied with all equipment, hardware, software, cabling and ancillary
services as required to provide an integrated system complete and functional in all respects.
The tenderers are to familiarize themselves with all matters related to such requirement and to
account for such in the tendered price.

It is the responsibility of the tenderer to obtain clarification of all matters in which doubt exists as
to the exact intent of this document or in which a conflict appears to have arisen. Such
information must be obtained before the closing and lodging of tenders.

CCTV system to be carried out by a specialist contractor

Provide only necessary coordination and builder’s work, Conduiting, trunking required to
incorporate the CCTV system works, in the finishes, interior works and civil construction works.

The response shall clearly detail all pricing for components, cabling, installation, engineering,
training, commissioning, setting to work, and 12 months comprehensive warranty.

1.2 Documentation

The following are the list of documentations required as minimum under this contract.

1.2.1 Material Submittal

Material submittal shall be comprehensive and shall include the following as minimum

System schematic diagram as proposed with specific reference to interoperability, describing

locations and types of cameras, video encoders, servers, monitors etc.

Brief description of system operation, functions and control sequences.

Schedule of all equipment with model number, names of manufacturers and country of origin

Product data sheets highlighting the selected model of proposed equipment. Product data
sheets of all components shall be submitted.

Software provider's license agreement stating limits on use, copying, and transferring software.

Copy of contract specifications complete with clause wise compliance statement.

1.2.2 Workshop Drawings

Lay out drawings complete with cable sizing, cable routing, containment sizing, location of
equipment, power requirements and data ports for system components, etc and installation
details of door hardware. Drawings shall also indicate requirements of back boxes, pull boxes,
access panels, data, power etc.

1.2.3 As-built drawings

Submit number of sets of final as-built drawings as indicated in the contract documents including
the above items marked up with labels of each component.

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1.2.4 Operation & Maintenance Manual

Descriptive data of all operating, user and application software including complete operators
manuals, programmer’s manuals, and alphanumeric point name convention sheet.

Provide final documentation to serve the diverse needs of personnel concerned with operation,
procurement, installation and maintenance.

Operation & Maintenance manuals shall be complete with preventive maintenance schedules,
procedures and troubleshooting procedures.

1.2.5 Training Manual

Shall include CV's of trainers, brief description of the installed system, preventive and
breakdown maintenance procedures and training mode.

Training agenda covering training mode, duration, number of trainees in each session etc. shall
be submitted at least three weeks prior to the training.

1.3 Manufacturer & Installer Qualifications

The system shall be engineered, commissioned and serviced by the manufacturer or

manufacturer's authorized systems integrator employing factory trained personnel for
commissioning and after sales support. Materials and equipment shall be the catalogued
products of manufacturers regularly engaged in production of access control equipment and the
products proposed shall be the latest versions commercially available at the time of the bid.

The manufacturer shall be ISO-9002 and ISO 9001 certified for Quality Assurance in Production,
Installation and Servicing.

The specialist shall obtain and submit a written undertaking from the manufacturer that the
spare parts of the system proposed will be made available upon request for at least 10 years
from the date of substantial completion. In addition, the manufacturer shall undertake to ensure
forward compatibility of the proposed equipment for at least 15 years

1.4 Reference Standards

Complete CCTV design and installation shall be in accordance with BS 7958 (CCTV-
Management and operation code of practice), BS 8418 (code of practice for the installation and
remote monitoring of detector activated CCTV systems.)

All equipment and systems installed under this Contract shall meet following specifications on
electromagnetic compatibility:

Interference immunity according to EN50082-2

Emitted interference according to EN50081-1

Provide equipment which functions and meets all detailed performance criteria when operating
in the following minimum ambient condition ranges:

Operating Temp. – 0 to 50 deg C (32 to 122 deg F] (Class 3K5 to IEC 721)
Relative Humidity 10% to 85% non -condensing (Class 3K5 to IEC 721)
Electrical power service of single phase, 240V AC +/- 10%, 50 Hz nominal

1.5 System Description & Requirements

CCTV systems based on internet protocol shall be provided at strategic location for security and
general surveillance. CCTV systems shall be used to provide the following key functions
1. Real time surveillance.
2. Recording of real time events and historical video data for video evidence of a security event.
3. Provide a deterrent to criminal and unacceptable behavior.

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The CCTV system shall be based on internet protocol (IP), utilizing digital technology for
recording and for transmitting video images via the local area network (LAN). This system shall
allow the flexibility for additional cameras to be added to the system at any time and be viewed
on any workstation with a network connection and has recognized software license.

The CCTV system shall include Fixed wall mounted CCTV cameras, Fixed dome CCTV
cameras. All cameras type must be meeting to MOI-SSD General specification of the security
surveillances system ANNEX: 1. Monitoring & controlling shall be done in the security room.

System must have sufficient Storage for all Camera Recordings for a period of 120 days in
MPEG-4 or H.264 format or better quality compression techniques. The recording frame rate
and resolution must be programmable from the user level. It should give the ability to customize
also quality of the video output based on the viewing needs and storing capacity

Cat6 cables shall be used for linking the cameras to the SMART patch panel

All network camera must possess the following general features and functionality:

• IP based protocol
• Multi-Megapixel/HD resolution
• Day and night and Auto IRIS lens
• Power over Ethernet or using power injectors
• Fixed/ varifocal / PTZ functions
• Wide Dynamic range (WDR), backlighting compensation and auto white balance with manual
override
• Image stabilization
• Privacy masking
• CS-type mounting
• IP66 rated, weatherproof, tamperproof and vandal proof housing
• Supports full frame rate of (30fps) of video.
• Integrated input/output audio (simplex, half-duplex and full duplex) support
• Internal recording or local recording on memory card or USB hard drive must be supported.

For a particular application, network cameras must support the following: as applicable

• automatic number plate recognition (ANPR)

• Video motion detection, and alarm handling.
• Video analytics
• Facial recognition
• Wireless and mobile transmission
• Intelligent camera features

1.6 Design Criteria

 The CCTV System is been designed to be an open IP platform System complied with all
recent international CCTV Standards. The IP CCTV system is been designed with a scalable
architecture to allow expansion through the installation of additional cameras, control, and
switching devices with no limit on the number of workstations located throughout the IT
network.
 All remote monitoring stations shall view and control cameras over dedicated TCP/IP Network
through the Digital Video Management System (DVMS). Network Video Recorders shall be
located in the Mezzanine floor.
 The system is been designed to offer high quality live video display, video analytic for assisted
guarding operation and forensic search, flexible storage and central managed operations. The
system shall offer full CCTV area coverage.
 The IP Cameras are Megapixel Resolution Cameras.
 The IP Cameras are in complying with the MOI-Security System Department standards.

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 The IP Cameras include both Fixed and PTZ Cameras as per the monitoring requirements.
 The Video Management Servers are comprehensive server application/solution to support
simultaneous display, monitoring, network access; switching and camera control of live,
online, and archived video review at any of the system user interface positions and supporting
multiple operators.
 The Network Storage System incorporate a Networked Digital Video Recording System and
Video Transmission System having a capability to record at higher resolution and frame rates
to record and store the video for 120 days minimum as per the MOI-SSD Standard.

The CCTV workstation incorporates a Graphical user Interface platform including all recent standards
but not limited to
• Video Sources
• Recording / Playback Video
• View Options
• Zone Editor
• Display
• Event Notifications
• Alarm Indications and Control
• Set up and Tuning Parameters
• Digital IO
• Event Log

2.0 PRODUCTS

2.1 IP Fixed cameras, 1.3 MP, D/N, IP66, IK-10 Vandal resistance
The camera shall have the following features:
• HD 720p camera shall provide clear images 24/7-even at night or under low-light conditions.
• Excellent low –light performance (0.017 lx in color)
• Intelligent Dynamic noise reduction (iDNR)
• Auto back focus for fast installation.
• 1280X720 resolution
• Scan: Progressive
• Color representation: complies with ITU-R BT.709
• Aspect ratio: 16:9
• Frame rate:25/30 & 50/60/s
• 24 VAC/12 VDC or POE
• 1/3-inch CMOS HD Sensor
• 1.4 MP
• H.264 stream together with an M-JPEG stream.
• Overall IP Delay : Min. 120ms, Max 240ms
• Monochrome: 0.0057 lx (0.00057fc)
• Backlight compensation (IVA) : off, Auto, Intelligent AE (iAE)
• Dynamic range : 84 dB typical
• Intelligent Video Analysis
• Internal RAM : 10 s pre-alarm recording
• Remotely programmable software update
• Protocols : IPv4, IPv6
• Encryption: TLS 1.0, SSL, DES, 3DES, AES
• Ethernet : 10/100 Base-T, auto-sensing, half/full duplex
• Automatic iris control
• Operating temp. -20°C to 50°C
• Storage temp. -30°C to +70°C

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• Operating Humidity – 20% to 93% RH

• Storage Humidity- up to 98% RH

2.2 IP Dome Camera, 1.3MP, D/N, Auto-iris, IP66, IK10 Vandal resistance

The camera shall have the following features:

• HD 720p camera shall provide clear images 24/7-even at night or under low-light conditions.
• Excellent low –light performance (0.017 lx in color)
• Intelligent Dynamic noise reduction (iDNR)
• Auto back focus for fast installation.
• Content-Based Image Technology
• 1280X720 resolution
• Scan: Progressive
• Color representation: complies with ITU-R BT.709
• Aspect ratio: 16:9
• Frame rate:25/30 & 50/60/s
• 24 VAC/12 VDC or POE
• 1/3-inch CMOS HD Sensor
• 1.4 MP
• H.264 stream together with an M-JPEG stream.
• Overall IP Delay : Min. 120ms, Max 240ms
• Monochrome: 0.0057 lx (0.00057fc)
• Backlight compensation (IVA) : off, Auto, Intelligent AE (iAE)
• Dynamic range : 84 dB typical
• Intelligent Video Analysis
• Internal RAM : 10 s pre-alarm recording
• Remotely programmable software update
• Protocols : IPv4, IPv6
• Encryption: TLS 1.0, SSL, DES, 3DES, AES
• Ethernet : 10/100 Base-T, auto-sensing, half/full duplex
• Automatic iris control
• Lens : Varifocal SR ( Super resolution)
• Viewing angle : Wide 105° x 74° (HxV)
• Operating temp. -50°C to +50°C
• Storage temp. -30°C to +70°C
• Operating Humidity – 20% to 93% RH
• Storage Humidity- up to 98% RH
• Ingress Resistance : IP67, NEMA Type-4X

2.3 PTZ Dome, 1.3MP, 12X Optiocal Zoom, D/N, WDR, Auto-iris, IP66, IK10 Vandal resistance.

• Be both IP66, IK10 and NEMA 4X-rated

• Start-up and operate between -40°C to +50°C (-40°F to +122°F)
• Be equipped with a 10BASE-T/100BASE-TX Ethernet interface
• Be equipped with a progressive scan sensor and provide images down to 0.74 lux in day
mode and 0.04 lux in night mode
• Be equipped with 18x optical zoom and so called Day/Night functionality
• Provide at least two video streams at full frame rate (30/25 fps) in HDTV 720p (1280x720)
resolution
• Support simultaneous individually configured Motion JPEG and H.264 video streams
• Support both unicast and multicast H.264 with support for both Constant and Variable Bit Rate
• A standalone injector shall provide required power to camera, heaters and fans over the
network cable.
• Accept static IP addresses as well as addresses provided by a DHCP
• Shall have a SD/SDHC card slot to support local storage of video
• Support both IPv4 and IPv6 based addresses
• Provide accurate high-speed pan-tilt functionality with 360° endless pan range and a 220° tilt
range

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• Provide pan and tilt speed between 0.05° - 450°/sec

• Support auto tracking, guard tour functionality and incorporate at least 100 presets.
• Provide text overlay that includes date/time support synchronized with an NTP server and the
ability to apply a graphical image as an overlay into the video image.
• Provide multiple user password levels, support for HTTPS and SSL/TLS and incorporate IEEE
802.1X authentication
• Be equipped with an SD/SDHC memory card slot for local storage
• Include embedded event functionality, which may be triggered by:
o video motion detection
o PTZ position
o Camera temperature outside of operative range
o Fan malfunction
o local storage full
• Event actions supported by the camera shall include:
o remote notification, including video upload
o preset call-up
o guard tour activation
o recording to local storage
• Be equipped with a built-in web server
• Be supported by an open and published API.

2.4 Network storage

Video storage can be managed remotely via a LAN or over the Internet giving greater flexibility
The network storage shall be compatible with all renowned brands of IP cameras oblique digital
video server and encoders.

Storage shall have the following characteristics:

o Four FC-8 Host Ports

o 12GB Mirrored Non-Volatile backed Cache
o Highly Available N+1 Architecture
o RAID 1, 5 and 6
o Scalable to 180TB in 4U, 360TB in 8U
o Data Tiering – Mix and Match SAS, SATA and SSD drives
o SATA Disk Data Integrity Option(s)
o Integrated Storage Appliance with 60 top-loading 3.5” drives in 4U
o Scalable to 120 drives in 8U
o 12GB of mirrored battery backed up cache minimum
o Mix SAS, SATA and SSDs in a single storage appliance chassis delivering tiered storage
performance.
o Perform at high rates of throughput AND random IOPS.
o Top loading drive access serviceability time greater than three minutes.
o Tool-less Drive Removal
o Hot Swappable N+1 Active/Active Controllers.
o MPIO Support without the need for custom client-side drivers or software
Windows, Linux and Mac OS multi-path ready
o Redundant, hot swappable SAS channel expansion ports
o Technology to detect silent data corruption and correct on SATA drives.
o Manufacturer supported federated scale-out performance and scalability beyond a single
appliance for both SAN and NAS workflows.

Performance:

o 350,000 cache IOPS

o 30,000 sustained read IOPS (SAS 15K)
o 63,000 sustained IOPS (SSD)
o 2GB/sec sustained read bandwidth
o 1.8GB/sec sustained write bandwidth

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Management:

o SNMP
o Web based GUI
o CLUI
o Email alerts

2.5 Operator Workstation

Form Factor Small form factor; Convertible-maybe used as desktop or

tower; optional tower stand
Operating system Windows 7 Ultimate 64-bit and other editions available, Red
Hat Enterprise Linux Desktop/Workstation
Chipset Intel C216 Chipset
Memory 4 DIMM slots, up to 32 GB ECC/non-ECC, DDR3 1600MHz
Drive Controllers Integrated SATA Controller, RAID 0, 1 supported; 2 ports 3
GB/s, 2 ports 6 GB/s
Optical Storage DVD-ROM, DVD+/-RW DL Super Multi, HP Blu-ray Writer,
HP 22-in-1 Media Card Reader
Drive Bays 1 internal 3.5 inch ba, and 1 shared with external 3.5-inch
bay; 1 external 5.25-inch bay
Expansion slots 1 PCle Gen3x16, 1 PCle2x4/x16, 2 PCle Gen2x1, 1 PCl (All
slots are Low Profile)
Network Intel 82579 GbE network Connection
Ports Front: 4 USB 2.0, 1 Microphone, 1 Headphone out
Rear: 4 USB 3.0, 2 USB 2.0, 1 Audio in, 1 Audio out, 1
Standard/1 Serial port, 1 parallel (Optional)
Input Devices HP PS/2 Keyboard, HP USB keyboard, HP USB CCID smart
card keyboard, and mouse.
Dimensions Standard desktop orientation 3.95 x 13.3 x 15.0 in (10.0 x
33.8 x 38.1 cm)
Power supply 240-Watt 90% efficient power supply

2.6 Monitors

Viewable Image Sie 23’’

Aspect Ratio 16:9
Native Resolution 1920 x 1080
Pixel Pitch 0.265mm
Pixels per Inch 96 @native resolution
Backlight Type W-LED
Displayable colors 1.07 billion out of 4.3 trillion
Input Converters Display Port, HDMI, DVI-D, VGA 15-pin D-sub
Power Consumption:
On (Typical) 29W
Power saving mode (Typical) 0.3W
Dimensions 21.4 x 14.9-20.8 x 9 in. / 543.6 x 338-488 x 227.6mm

2.7 Video wall workstation

Processors Intel Xenon processor E5-2600 family with up to eight cores & Intel
Advanced vector extensions, Intel trusted execution technology
Operating System Windows 8 ultimate (64-bit)
Chipset Intel C602
Memory Quad channel; up to 256 GB 1600 MHz ECC RDIMM memory
Graphics NVIDIA Quardro K5000
GPU One to two NVIDIA Tesla K20C GPGPU
Virtualization Workstation virtualization for up to 4 users via GPU pass-through on
Select configuration with certified hypervisors
Storage Options Up to six 2.5 SATA or SAS drives
SATA 7200RPM Upto 1 TB

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Storage controller Integrated: LSI 2308 6 GB/s SATA

Communications Integrated: Intel 82579 Gigabit Ethernet controller with remote wake
UP
Remote Access Optional tera2 dual display PCoIP PCIe remote access host card
Standard ports USB 2.0, USB 3.0, and RJ45 etc
Monitors Ultra wide viewing from 21.5 – 30 inch
Optical drive tray load options: DVD-ROM; DVD+/-RW, Blu-ray
Environmental RoHS, WEEE

2.8 Control Room

• Main Control room must have the proper size and space for monitors and operators, ventilation
and lightings, access security and alarm system, sufficient power system and the required
communication system for local and police authority emergency communications.

• The Control room should be operational around the clock throughout the year

• Should have the required number of personnel to operate, manage and maintain the system
as well as the required training.

• Three (3) work shifts of eight (8) hours for operators must be performed to maintain the
• 24x7 round the clock operation...

• If there is need, the control room must have a direct hotline connectivity to the National
Command Center

• If required, the control room must have a secured connectivity for remote monitoring to the
National Command Center.

• The Control room must have an electronic security access and a power back up system in
case of power failure.

• The Control room must have physical protection and safety devices.

• For any emergency, the room must have an evacuation plan for the safety of the personnel

• The control room must have proper lighting and ventilation. The room must also be equipped
With physical protection and alarms for any external attack and intrusion detection system to
prevent unauthorized entry.

2.9 Networking Components

Active equipment like switches, routers etc. required to achieve network connectivity

3.0 EXECUTION

3.1 Supervision

All works associated with implementation of the security system shall be carried out under the
direct supervision of a representative of the approved specialist systems integrator. Installations
shall be carried out by skilled technicians.

3.2 Workshop Drawings

Detailed engineering shall be the carried out by a factory trained engineer working with the
approved specialist systems integrator. Workshop drawings shall detail all cable types, conduits,
backbox/power requirements, mounting details etc. Workshop drawings submitted for
Engineer's approval shall be duly signed and stamped by the specialist systems integrator.
Detailed system schematic diagram showing cable sizes and types, exact locations of devices,
server, workstations etc. shall be submitted alongwith the workshop drawings. Detailed lay out of

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the security control room complete with equipment console and furniture shall be submitted
separately for approval.

3.3 Coordination

The supervisor of installation shall be fully responsible for coordination with specialist’s
integrators of other systems to which the system has an interface or integration.

3.4 Labeling

A labeling scheme shall be submitted for approval of the Engineer. All cables and devices shall
be labeled to the approved scheme.

3.5 Containment

All wires and cable shall be installed in GI conduits or metallic cable trays. Sizing of containment
shall be carried out during detailed engineering to be carried out by the specialist. Containment
shall be sized such that a 25% spare capacity is available for any modifications to the system
after handing over.

3.6 Grounding

Each piece of electronic equipment shall be properly grounded before energizing. All wire
shields shall be grounded at the hub end only, not at the remote or device end. Ground system
components & conductor & cable shields to eliminate shock hazard & to minimize ground loops,
common-mode returns, noise pickup, cross talk, & other impairments.

3.7 Testing and Commissioning

All tests shall be carried out according to a detailed procedure duly approved by the Engineer.
The tests shall be carried out in phases.

Cables are to be tested for any damage occurred during transportation to site and/or during the
course of pulling-in and laying.

Pre-testing: Upon completing installation of the system, align, adjust and balance the system
and perform complete pre-testing. Determine, through the pre-testing, the conformance of the
system to the requirements of the drawings and specifications. Correct deficiencies observed in
pre-testing. Replace malfunctioning or damaged items with new & retest until satisfactory
performance & conditions are achieved. Prepare forms for systematic recording of acceptance
test results.
Report on Pre-testing: After pre-testing is complete, provide a letter certifying the installation
Is complete and fully operable, including the names and titles of the witness to the preliminary
tests.

Final test notice: Provide a 10-day minimum notice in writing when the system is ready
For final acceptance testing.

Resetting: Correct deficiencies indicated by tests and completely retest work affected by such
deficiencies. Verify by the system test that the total system meets the specifications and
complies with the applicable standards.

3.8 Training

Engage a factory-authorized service representative, whose credentials are approved by the

Engineer, to explain programming and operation of system and to train Employer's maintenance
personnel on procedures and schedules for maintaining, programming, operating, and adjusting,
troubleshooting, and servicing system.

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Training shall be carried out to an approved training manual Separate training shall be provided
on the hardware and software. Each training shall have both class room session and hands on
session. Contractor shall allow for 6 trainees each in both the trainings.

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D. SCHEDULE OF LUMINAIRES

SUBSTATION
BRAND AND
AREA TYPE IMAGE
ORIGIN

Slim section batten luminaire for 2

x 35W T16 lamp. electronic - fixed
MV
output circuit with integral THORN OR
ROOM,TRA
emergency facility. Three position EQUIVALENT
NSFORMER F2
lampholder gives maximum APPROVED MAKE:
AND LV
mounting flexibility. Body steel EUROPE/UK
ROOM
with white finish.To be provide
with reflector.

Contemporary round bulkhead

luminaire for 2 x 18W TC-DEL
lamp(s) with electronic - fixed THORN OR
EXTERNAL output circuit. Bezel with white EQUIVALENT
W1
WALL finish. Diffuser in opal APPROVED MAKE:
polycarbonate. Supplied with EUROPE/UK
Quick Fix fixing and wiring box.
Complete with 840 lamp(s).IP 65

Self-contained 1 x 18W T26

fluorescent emergency exit sign
luminaire with white stove
THORN OR
enamelled steel body with opal
WALL EQUIVALENT
Polycarbonate (PC) panel, suitable
MOUNTED EXIT APPROVED MAKE:
for interior use formaintained
EXIT LIGHT EUROPE/UK
emergency applications of 3 hour
duration. 96211125 VOYAGER XXL
1x18w T26 E3M LI

1 Luminaries shall be as per Luminaire schedule. Any alternate proposal shall be submitted
with product comparison and sample for approval.

QDC/2619 REV.0 Page D/1

 ELECTRICAL SPECIFICATION PACKAGE 5
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E. SCHEDULE OF APPROVED VENDORS

SL.NO DESCRIPTION BRAND NAME COUNTRY OF LOCAL AGENTS

ORIGIN
1 Transformer Metelec Group Lebanon Mannai Trading
Tel: 4558888
5802576

Emirates UAE Darwish Trading Co

Tel; 4422781

Federal UAE Gulf lights

Tel: 4699683

U-Tech Saudi Doha Technical

Services
Tel : 4877335

ABB Germany Integra

Tel no : 44369776

Schneider France Schneider electric

Tel no : 44676455
2 L.V.Panel
Schneider Electrical France P.O.Box-24795
Doha-Qatar Tel no
:44676455, Fax no :
44676936

L&T/Schneider INDIA/France Diplomat Switchgear

Tel: 44502544

Cutler Hammer/Eaton U.S.A Gulf Switch Gear

Tel: 4502467

ABB Germany Barakat Engineering

Tel: 44692763

Hager France Al Mufta

Tel: 44423105
3 Main Switch Board/ Sub
Main Switch Board and Schneider Electrical France P.O.Box-24795
DB Doha-Qatar Tel no
:44676455, Fax no :
44676936

L&T/Schneider INDIA/France Diplomat Switchgear

Tel: 44502544

Cutler Hammer/Eaton U.S.A Gulf Switch Gear

Tel: 4502467

ABB Germany Barakat Engineering

Tel: 44692763

Hager France Al Mufta

Tel: 44423105

QDC/2619 REV.0 Page E/1

 ELECTRICAL SPECIFICATION PACKAGE 5
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4 MCB, MCCB, ELCB

Schneider Electrical France P.O.Box-24795
Doha-Qatar Tel no
:44676455, Fax no :
44676936

L&T/Schneider INDIA/France Diplomat Switchgear

Tel: 44502544

Cutler Hammer/Eaton U.S.A Gulf Switch Gear

Tel: 4502467

ABB Germany Barakat Engineering

Tel: 44692763

Hager France Al Mufta

Tel: 44423105
5 Isolator MK UK Electro Trade Co.
(Metal for outdoor) Tel: 4424669

ABB Sweden/ Laffan Trading & Contracting

Finland Tel: 4329738

Jaidah Group
Schneider France Tel: 44602440

Al Mufta
Hager France Tel: 44423105

6 Cables and wires Doha Cables Qatar Tel : 44902191/44652645

Ducab UAE JBK Control

Tel : 4442775

Gulf cables Kuwait Laffan Trading & Contracting

Tel: 4329738

Jedah cable KSA

El Sewedy cables Egypt

7 Cable glands BICC UK Laffan Trad. Co.

Tel:4329738

Hawke UK Al Shaibeh Est.

Tel: 4322140

CMP UK Darwish Trad. Co.

Tel:4422781
8 Fire Resistant cables Firecel UK J.B.K Controls
Tel:4442775

A.E.I. Cables UK Laffan Trad. Co.

Tel:4329738

FP400 Pirelli UK Darwish Trad. Co.

Tel:4422781

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 ELECTRICAL SPECIFICATION PACKAGE 5
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9 PVC Ducts Hepworth UAE Al Andalus Trading

Tel: 4432827

Marley Qatar Qatar Plastic Additives

Tel:4603773

Qatar National Plastic factory

Q-Plast Qatar Tel:4689977

JBK Control
Tel : 4442775
Commat UAE
10 PVC conduits and Decoduct UAE Laffan Trad. Co.
Accessories Tel:4329738

Marshal Tufflex UK Al Shulah Electrical

Equipment
Tel: 4431123

Saudi Ega KSA Electro Trade Co.

Tel: 4424669

Clipsal Australia/UAE Ms.Tissco Elec.Div.

11 G.I. switchbox Saudi Ega KSA Electro Trade Co.

Tel: 4424669

Eletra Saudi MATES-Alfanar

Group
Tel : 4324584/586

Decoduct UAE Laffan Trad. Co.

Tel:4329738

Barton Engineering Japan Darwish Trading co.

Ltd Tel : 4422781
12 G.I. Conduit and MK UK Electro Trade Co.
Accessories Tel: 4424669

Barton UK Darwish Trad. Co.

Tel:4422781

Burn UK Electro Trade Co.

Tel: 4424669

Panasonic japan Consolidated supplies Co.

Tel : 4682099
Fax :4684874
13 G.I. Cable Tray and Marshal Tufflex UK Al Shulah Electrical
Accessories Equipment
And Trunking Tel: 4431123

Barton UK Darwish Trad. Co.

Tel:4422781

MK UK Electro Trade Co.

Tel: 4424669

Burn UK Electro Trade Co.

Tel: 4424669

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 ELECTRICAL SPECIFICATION PACKAGE 5
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Wire mold UK

Alpha UAE Tel:44417815 / 20

Lanric Malaysia Power max Trading co WLL

Tel:4437586

Supreme Technologies
Thomas & Betts Saudi Tel : 44811805

14 Earthing, Bonding and W. J. Furse & Co ltd UK Darwish Trad. Co.

Lightning Protection Tel:4422781

A.N. Wallis UK Laffan Trad. Co.

Tel:4329738

Erico USA Sentor

Tel: 4428436
15 Wiring Accessories, MK UK Electro Trade Co.
Timer, Photocell Tel: 4424669
etc
Contactum UK Mannai Trading
Tel: 4558888
5802576

CLIPSAL Australia TISSCO

Electrical Division
Tel: 4580529
Fax: 4880225
Hamilton UK Supreme Technologies
Tel : 44811805
16 Junction Box Scame Italy Satco International
Tel: 4438038

Krone Germany Qatar Communication

Services
Tel: 4432075

Eletra Saudi MATES-Alfanar Group

Tel : 4324584/586

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 ELECTRICAL SPECIFICATION PACKAGE 5
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17 Light Fixtures Gewiss Italy Darwish Trading Co. Wll

Tel: 44566425

Regiolux Germany Project and supplies

Tel : 44355550/44350294

SBP Italy

Modus Czech Ipas Qatar Trading

Republic Tel : 4436

Thorn UK

Frater Spain* Gulf lights

Tel: 4699683

RUUD USA

Bair Spain Qatar Arabian Technology

Tel : 4365909

Thorlux UK

Trilux Germany

18 Emergency Lights
Emergilite UK Gulf lights
Tel: 44699683

ETAP Belgium Gulf lights

Tel: 44699683

RZB Germany Lumatron,Doha,

Qatar
Tel : 4622991
Fax : 4622992

Ludwig Germany Benchmark trading &

Engineering Services
Tel:4690822

Cooper CEAG Germany J.B.K Controls

Tel:4442775

Maxwell UK Project and supplies

Tel : 44355550/44350294

19 Lighting control and MK HONEYWELL UK Electro Trade Co.

Guest room Tel :44424669
management system
ABB Low current Germany Integra Qatar
system Tel no. 44369776

Schneider Electric France Schneider electric

KBF Contracting Co.
Tel. No. 44676455

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 ELECTRICAL SPECIFICATION PACKAGE 5
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Caterpillar USA Power System

Tel : 44600222
20 Generator
F.G. Wilson UK Qatari Industrial Equipment
Co
Tel: 44600044

Cummins UK Jaida Group

Tel : 44602440

MTU UK Nasser Bin Khaled

Tel : 44602455

SDMO France
21 UPS & Batteries Safe Nife France Darwish Trading
Tel. 4437738

Siemens Germany Salam Technical Services

Tel.4690605

Gutor Switzerland Petrotech

Tel:4419603

GE Switzerland Gulf lights

Tel: 44699683

ESIS Turkey Supreme Technologies

Tel : 44811805
22 Fire Alarm System Secutron/ Cooper Canada, Argon Global
UK Tel: 44313039

Edward system Consolidated Engineering

technology Canada System
EST Tel : 4655581/82
Fax :465583

Consolidated Gulf Co.

Germany
Siemens Tel:44059000, 44441941

Naffco
44025853
USA
Honeywell
Al shaibeh Establishment Tel
Autronica no: 44322140.
Norway
Firelink
Tel : 4432522
USA
Simplex
J.B.K Controls
Tel:4442775
UK
Gent
23 Telecommunication & IT Alcatel Lucent USA Intercol Dyarco
System Tel : 33247321/ 33698042

Extreme- Networks, USA Argon Global

Tel: 44313039

CISCO Consolidated Gulf Co.

Tel:44059000, 44441941

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 ELECTRICAL SPECIFICATION PACKAGE 5
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Avaya/Cisco Europe/USA TechnoQ.

Tel: 44553265

Krone Germany Qatar Communication

services
Tel: 4432075
Nexen(Passive
component)

Systimax(Passive
component)

Siemens Germany Mannai Trading

Tel : 4558888
24 P.A System Bose,Bosch USA,Germany Consolidated Gulf Co.
Tel:44059000, 44441941

Darwish Trading
Tel: 4437738
Philips Holland
J.B. K. Controls
Tel : 4442775
Daldwin Boxall UK

25 CCTV Bosch, Howen USA, China Intercol Dyarco Security

Services
Tel : 33247321 / 33698042

GeoVision USA Momenta Global

Tel: 33810501, 70191408.

Consolidated Engineering
LENEL USA/UK System
Tel : 4655581

Consolidated Gulf Co.

Pelco/Honeywell France Tel:44059000, 44441941

Alcea Qatar
Tel no : 44416270
Alcea France

26 Structured Cabling for Hubbel, USA Argon Global

Telecommunication, Tel: 44313039
Data, FOC, Patch Panel
TE-Connectivity/ USA TechnoQ.
Panduit Tel: 44553265

R&M/Brandrex UK Consolidated Gulf Co.

Tel:44059000, 44441941

Peregrine Proj & solution.

Nortel Canada Tel. 4280000

Mannai Trading
Tel. 4558888
Cisco System USA
International.

QDC/2619 REV.0 Page E/7

 ELECTRICAL SPECIFICATION PACKAGE 5
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1 Luminaries shall be as per Luminaire schedule. Any alternate proposal shall be submitted with
product comparison and sample for approval.
2 LV Panel board shall be from the approved supplier and shall be a system as identified
against the approved manufacture
3 LV Panel shall be assembled by the panel manufacture or his approved panel builder, who
shall be the local agent for the respective manufacture.
4 The LV Panel builder shall have ASTRA certification for the proposed panel.
5 Motor Control Centre (MCC) for respective system shall be supplied by the equipment supplier
6 All Fire alarm system shall be supplied by the same supplier and shall be of the same make.
7 * - indicates assembles elsewhere ( UAE).

QDC/2619 REV.0 Page E/8

MECHANICAL SPECIFICATION
 INDEX

Section 19 PLUMBING WORK

Section 20 DRAINAGE WORKS FOR BUILDINGS
Section 22 AIR CONDITIONING REFRIGERATION AND VENTILATION
Section 23 FIRE FIGHTING SYSTEM
Section 28 IRRIGATION SYSTEM
Section 19 PLUMBING WORK
Part 1 General
Part 2 Water Distribution
Part 3 Plumbing Pipe Work in Trenches
Part 4 Cold Water Storage
Part 5 Hot Water Storage
Part 6 Commissioning of System

Addendum

Preferred Vendors List

MECHANICAL SPECIFICATION PACKAGE 5
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1 GENERAL ................................................................................................................................. 2

1.1 INTRODUCTION ....................................................................................................................... 2

1.1.1 Scope 2
1.1.2 References 2
1.2 REGULATIONS AND STANDARDS......................................................................................... 2
1.2.1 Qatar General Electricity & Water Corporation 2
1.2.2 Compliance with Standards 2
1.3 CONTRACTOR’S RESPONSIBILITY ....................................................................................... 2
1.3.1 General 2
1.3.2 Approval to Carry Out Plumbing Works 2
1.3.3 Registration of Plumbers and Plumbing Contractors 2
1.3.4 Notice of Intent 3
1.3.5 Existing Services 3
1.3.6 Maintenance Period Requirements 3
1.4 CRAFTSMEN ............................................................................................................................ 3
1.4.1 Workmanship 3
1.4.2 Qualifications 3
1.5 MATERIALS .............................................................................................................................. 3
1.5.1 General 3
1.6 DRAWINGS .............................................................................................................................. 4
1.6.1 Explanation of Project Drawings 4
1.6.2 Shop Drawings 4
1.6.3 Co-ordination Drawings 4
1.6.4 Record Drawings 4
1.7 SITE WORKS ...................................................................................................................... 5
1.7.1 Openings 5
1.7.2 Painting 5
1.7.3 Co-operation with other Trades. 5
1.7.4 Protection of Finish 5
1.7.5 Clean-Up 5
1.8 OPERATION AND MAINTENANCE MANUALS ....................................................................... 6
1.8.1 General Requirements 6

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1 GENERAL

1.1 INTRODUCTION

1.1.1 Scope

1 This Section specifies the requirements for the construction and installation of all works
associated with the supply, storage and distribution of potable water, with the exception of
those works normally undertaken by the Qatar General Electricity & Water Corporation
(QGEWC).

1.1.2 References

1 Related Sections are as follows:- Section 1 General

Section 9 Mechanical and Electrical

1.2 REGULATIONS AND STANDARDS

1.2.1 Qatar General Electricity & Water Corporation

1 The Contractor shall conform to all the requirements of the “Rules and Regulations for
Plumbing Works” as prepared by QGEWC.

1.2.2 Compliance with Standards

1 It is required that certain products, components and materials covered in this Section comply
with the provisions of particular standards (e.g. British Standards). Where there is a conflict
between a particular referenced standard and the requirements of QGEWC, the latter shall
prevail.

2 The Contractor shall conform to any requirements QGEWC may have with respect to
ensuring that products, components and materials comply with any referenced standard.
Such requirements may include, but not be limited to, samples, test results and supporting
documentation.

1.3 CONTRACTOR’S RESPONSIBILITY

1.3.1 General

1 The Contractor is responsible for obtaining all necessary approvals and permits required to
complete the Works.

1.3.2 Approval to Carry Out Plumbing Works

1 Approval to carry out plumbing works must be obtained from QGEWC for new installations
and extensions or alternations to existing installations.

2 All approval procedures shall be as required by QGEWC.

1.3.3 Registration of Plumbers and Plumbing Contractors

1 All plumbers and plumbing contractors shall be approved by QGEWC.

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2 All QGEWC water supply works shall be carried out by a contractor or sub-contractor pre-
qualified and approved by the QGEWC. Proof of such approval shall be required in writing
prior to the Works commencing on Site and the name of any sub-contractor to be used shall
be entered in the appropriate forms when the tender is submitted.

1.3.4 Notice of Intent

1 The Contractor shall notify QGEWC in writing at least 14 days prior to the commencement of
any plumbing works.

2 During the course of the Works, QGEWC or its nominated representative shall have full
access to the Works.

1.3.5 Existing Services

1 The Contractor is responsible for locating and identifying all existing services in the area of
the work or likely to be affected by the Work.

1.3.6 Maintenance Period Requirements

1 The Contractor is responsible for all the maintenance period requirements for all parts and
components of the Works covered in this Section. Such requirements shall include, but not
be limited to, the requirements of the Project Documentation and the manufacturer’s
recommendations.

1.4 CRAFTSMEN

1.4.1 Workmanship

1 Construction of each part of the Works covered in this Section shall be undertaken by
experienced craftsmen capable of performing the tasks allocated to them in a professional
and competent manner.

2 If required by the Engineer, the Contractor shall instruct craftsmen to demonstrate their ability
to perform tasks allocated to him.

1.4.2 Qualifications

1 Where the Project Documentation specifies that specialist craftsmen are required to
undertake a specific work task, the Contractor shall furnish the Engineer with copies of
qualifications pertinent to performing such work tasks for those craftsmen who will be
undertaking the work.

1.5 MATERIALS

1.5.1 General

1 All materials, components and products shall comply with the relevant provisions of Section
1, General, subject to the provisions of Clause 1.2.2 of this Part.
2 All materials, components and products shall be supplied by experienced and approved
manufacturers as designated in the Project Documentation and to the written approval of the
Engineer.

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1.6 DRAWINGS

1.6.1 Explanation of Project Drawings

1 For purposes of clearness and legibility, the Project Drawings are essentially diagrammatic,
and although size and location of equipment are drawn to scale where possible, the
Contractor shall make use of all data in all of the Contract Documents and shall verify this
information prior to and during construction.

2 Scale and figure dimensions are approximate and are for estimating purposes only. Before
proceeding with any part of the Work, the Contractor shall assume all responsibility for the
fitting of his materials and equipment to other parts of the Works.

3 All work not shown in complete detail shall be installed in conformance with accepted
standard practice and manufacturer’s recommendations.

4 All items shall be installed in a manner and in locations avoiding all obstructions, preserving
headroom and keeping openings and passageways clear. Changes shall be made to the
location of equipment and materials as may be necessary in order to accomplish this.

5 The drawings are essentially diagrammatic to the extent that many offsets, beds, traps,
special fittings and exact locations are not indicated. The Contractor shall carefully study the
drawings and premises in order to determine the best methods, exact locations, route,
building obstructions, etc., and shall install all apparatus and equipment in the available
locations.

6 Work indicated on drawings, but not mentioned in Specifications, or vice versa, shall be
performed as if specifically mentioned or indicated by both. Any supplementary labour or
materials required for a complete, approved, and properly operating installation shall be
furnished by the Contractor.

1.6.2 Shop Drawings

1 The Contractor shall prepare shop drawings for all parts of the Works to be installed or
constructed under this Section and submit them to the Engineer for approval. The shop
drawings shall include diagrams, illustrations, schedules, general arrangements of equipment
and appurtenances in relation to buildings and structures, method statements and details of
specialised installation and construction work.

1.6.3 Co-ordination Drawings

1 These shall be prepared by the Contractor to show how interdisciplinary work will be co-
ordinated. The location, size and details of fixings, box-outs, ducts, holes, pipe chases and
plinths shall be shown on the detailed layout drawings which are co-ordinated with all other
work disciplines.

1.6.4 Record Drawings

1 The Contractor shall prepare Record Drawings of all works constructed or installed under this
Section. These shall be prepared as work proceeds. They shall provide a record of any
modification to materials and equipment, and to the layout, arrangement and installation of
the Works.

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1.7 SITE WORKS

1.7.1 Openings

1 The Contractor shall co-operate with all trades in obtaining information as to openings
required in walls, slabs and footings for all piping and equipment. Sleeves shall be accurately
located and placed in forms before concrete is poured. Where several pipes pass through
floors in close proximity, the Contractor may provide a single framed opening in lieu of
individual sleeves. Framed openings shall be to the approval of the Engineer and shall be
provided with 100 mm high curbs, on all sides. The Contractor shall pay all extra costs for
cutting of holes as a result of incorrect, delayed or neglected locations of sleeves or frame
openings.

1.7.2 Painting

1 All finished painting shall be done as specified in the Project Documents. All apparatus and
equipment, not specified otherwise, shall be provided with a shop prime coat. All exposed
ironwork, tanks pipes, and fittings without factory finish, including pipe hangers and rods shall
be primed and painted with one coat of black asphalt varnish suitable for hot surfaces.
Exposed pipe threads in bare or insulated piping shall be thoroughly cleaned and painted with
two coats of metallic paint or red lead.

1.7.3 Co-operation with other Trades.

1 The Contractor shall so organise work progress to harmonise with the work of all trades so
that work may proceed as expeditiously as possible. The Contractor shall be responsible for
the correct placing of the Works and the connection thereof to the work of all related trades.

1.7.4 Protection of Finish

1 The Contractor shall provide adequate means for, and shall fully protect, all finished parts of
materials and equipment against damage from whatever cause during the progress of the
work and until final completion. All materials and equipment in storage and during
construction shall be covered in such a manner that no finished surfaces will be damaged or
marred and all moving parts shall be kept perfectly clean and dry. All damaged or defective
work shall be replaced prior to applying for final acceptance.

1.7.5 Clean-Up

1 During the progress of work, premises shall be kept reasonably free of the debris, waste
materials and rubbish resulting from work carried out under this Section. Upon completion
and before final acceptance of the Works, all debris, temporary protective coverings, rubbish,
left-over materials, tools and equipment shall be removed from the Site. Exposed piping,
machinery and other apparatus shall be thoroughly cleaned of cement, plaster, paint and
other materials; grease and oil spots shall be removed with cleaning solvent. Surfaces shall
be carefully wiped and all cracks and corners scraped clean. Chromium or nickel plated
materials and equipment shall be thoroughly polished. The entire installation shall be left in a
neat, clean and usable condition.

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1.8 OPERATION AND MAINTENANCE MANUALS

1.8.1 General Requirements

1 The Contractor shall prepare Operation and Maintenance Manuals for all mechanical,
electrical and electronic equipment installed under this Section.

2 Operation and Maintenance Manuals shall conform to the requirements of Clause 1.1.4 of
Section 9.

END OF PART

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2 WATER DISTRIBUTION ......................................................................................................... 2

2.1 GENERAL ................................................................................................................................ 2

2.1.1 Scope 2
2.1.2 References 2
2.1.3 Quality Assurance 3
2.2 WATER SYSTEMS .................................................................................................................. 3
2.2.1 General Requirements 3
2.2.2 Cold Water Systems 3
2.2.3 Hot Water Systems 4
2.2.4 Pressurised Systems 4
2.3 PUMPS .................................................................................................................................... 5
2.3.1 General Requirements 5
2.3.2 Lift Pumps 5
2.3.3 Circulation Pumps 5
2.3.4 Pipework Connections 5
2.3.5 Control 6
2.4 WATER DISTRIBUTION PIPEWORK ..................................................................................... 6
2.4.1 General Requirements 6
2.4.2 Pipe Materials 6
2.4.3 Pipework Jointing 7
2.5 PIPE FIXINGS.......................................................................................................................... 7
2.5.1 General Requirements 7
2.5.2 Spacing of Pipe Fixings 7
2.6 TAPS, VALVES AND PROTECTION DEVICES ..................................................................... 9
2.6.1 Draw-off Taps 9
2.6.2 Drain Taps 10
2.6.3 Ball Float Valves 10
2.6.4 Servicing Valves 10
2.6.5 Stopvalves 11
2.6.6 Backflow Protection Devices 11
2.7 PIPE INSTALLATIONS .......................................................................................................... 12
2.7.1 General Requirements 12
2.7.2 Pipework Expansion 12
2.7.3 Pipe Sleeves 12
2.7.4 Concealed Pipe work 12
2.8 INSULATION OF WATER PIPES ......................................................................................... 13
2.8.1 General 13
2.8.2 Application 14
2.9 MISCELLANEOUS................................................................................................................. 14
2.9.1 Electrical Work Related to Plumbing Works 14
2.9.2 Water Meter Cabinet 14

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2 WATER DISTRIBUTION

2.1 GENERAL

2.1.1 Scope

1 This Part specifies the requirements for the installation, testing and commissioning of
services supplying water for use within buildings. It covers the system of pipes, fittings and
connected appliances installed to supply any building with water for ablutionary, cleaning,
sanitary and laundry purposes.

2 Related Sections and Parts are as follows: This Section

Part 1 General
Part 4 Cold Water Storage
Part 5 Hot Water Storage
Part 6 Commissioning of Systems

Section 1 General
Section 9 Mechanical and Electrical
2.1.2 References

1 The following standards are referred to in this Part:

BS 864 .......................Capillary and compression fittings for copper tubes and copper alloy.
BS 1010......................Specification for draw-off taps and stopvalves for water services
(screw-down pattern).
BS 1212......................Specification for float operated valves (excluding floats).
BS 1394......................Stationary circulating pumps for heating and hot water service
systems.
BS 1968......................Specification for floats for ballvalves (copper).
BS 1972......................Specification for polythene pipe (Type 32) for above ground use for
cold water services.
BS 2456......................Floats (plastics) for float operated valves for cold water systems.
BS 2494......................Specification for elastomeric joint rings for pipework and pipelines.
BS 2580......................Specification for underground plug cocks for cold water services.
BS 2871......................Specification for copper and alloy tubes.
BS 2879......................Specification for draining taps (screw-down pattern).
BS 3505......................Specification for unplasticized polyvinyl chloride (PVC-U) pressure
pipes for cold potable water.
BS 3958......................Thermal insulating material.
BS 4127......................Specification for light gauge stainless steel tubes.
BS 4346......................Joints and fittings for use with unplasticized PVC pressure pipes.

BS 4991......................Propylene copolymer pressure pipe.

BS 5114......................Specification for performance requirements for joints and compression
fittings for use with polyethylene pipes.

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BS 5154......................Specification for copper alloy globe, globe stop and check, check and
gate valves.
BS 5163......................Specification for predominantly key-operated cast iron gate valves for
waterworks purposes.
BS 5412......................Specification for the performance of draw-off taps with metal bodies
for water services.
BS 5413......................Specification for the performance of draw-off taps with plastics bodies
for water services.
BS 5422......................Method for supplying thermal insulating materials on pipes, ductwork
and equipment
BS 5433......................Specification for underground stopvalves for water services.
BS 6144......................Expansion vessels using an internal diaphragm, for unvented hot
water supply systems.
BS 6281......................Devices without moving parts for the prevention of contamination of
water by backflow.
BS 6282......................Devices with moving parts for the prevention of contamination of water
by backflow.
BS 6283......................Safety devices for use in hot water systems.
BS 6437......................Specification for polyethylene pipes (type 50) in metric diameters for
general purposes.
BS 6572......................Specification for blue polyethylene pipes up to nominal size 63 for
bellow ground use for potable water.
BS 6700....................Specification for design, installation, testing and maintenance of
services supplying water for domestic use within buildings and their
curtilages.
BS 7671......................Requirements for electrical installations.

DIN 8079 ....................Pipes made of chlorinated PVC

DIN 8080 ....................Pipes made of chlorinated PVC

2.1.3 Quality Assurance

1 Items and equipment specified in this Part shall be provided by experienced and approved
manufacturers and fabricators as designated in the Project Documentation or to the written
approval of the Engineer.

2.2 WATER SYSTEMS

2.2.1 General Requirements

1 Internal hot and cold water supply installations shall be constructed so that water delivered is
not liable to become contaminated to the extent that it is hazardous to health or is unfit for its
intended use.

2.2.2 Cold Water Systems

1 Cold water systems shall be capable of providing cold water at the locations and in the
quantities required and specified in the Project Documentation.

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2 All cold water draw-off points shall be served via a cold water storage tank. The cold water
storage tank will be served directly from the Qatar General Electricity & Water Corporation
(QGEWC) supply mains.

2.2.3 Hot Water Systems

1 Hot water systems shall be capable of providing hot water at the locations, in the quantities
and at the temperatures required and as specified in the Project Documentation.

2 To promote maximum economy of fuel and water the hot water distribution system should be
designed so that hot water appears quickly at the taps when opened. To this end, dead legs
should be as short as possible. The hot water pipe feeding a spray tap for hand washing
should not exceed 1 metre in length. When draw-off points are situated at a distance from
the hot water storage vessel, consideration should be given to the use of a separate water
heater installed close to those draw-off points. When this is impracticable a secondary circuit
with flow and return pipes to the storage vessel should be considered. Secondary circuits
inevitable dissipate heat and should be avoided where possible

2.2.4 Pressurised Systems

1 Whether hot or cold water is involved, it shall be ensured that no part of the system bursts
due to the hydraulic pressures to which it is subjected. The pressures in the system shall
never exceed the safe working pressures of the component parts. The maximum working
pressure in a sealed primary circuit shall not exceed 3 bar but it shall be capable of passing a
test at 1.5 times the working pressure at the working temperature. The maximum working
pressure in an unvented hot water storage vessel or secondary circuit shall not exceed 6 bar.

2 Where necessary the supply pressure shall be controlled by using an atmospheric break tank
or pressure reducing valves. If the supply to a storage type water heater is through a
pressure reducing valve of the type that permits backflow, the working pressure in the system
shall be assumed to be the maximum pressure upstream of the valve. Where reliance is
placed on pressure reducing valves to limit the maximum working pressure, these shall
comply with BS 6283: Part 4.

3 Provision shall be made to accommodate expansion of water by one of the following

alternative methods:

(a) allow the expansion water to travel back along the cold feed pipe, provided that
heated water cannot reach any communication pipe or branch feeding a cold water
outlet
(b) where reverse flow along the cold feed is prevented by a stopvalve a with loose
jumper, replace this valve by one with a fixed jumper
(c) where reverse flow along the cold feed is prevented, provide an expansion vessel in
accordance with BS 6144 to accommodate expansion water. This vessel shall be
sized in accordance with the volume of water heated and the water temperature rise
so as to limit the pressure to the maximum working pressure for the system. The
expansion vessel shall accommodate an expansion equal to 4% of the total volume of
water heated. Any discharge from relief valves shall be readily visible and disposed
of safely.

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2.3 PUMPS

2.3.1 General Requirements

1 The installation of a pumped system should be undertaken by competent specialists

experienced in such work.

2 Pumps shall be installed in accordance with the manufacturer’s recommendations and in an

accessible location such that they may be readily maintained.

3 All pumps and associated equipment shall be capable of continuous operation in ambient
0
temperatures of up to 50 C.

4 Pumps shall be low speed and quiet in operation.

5 Pumps shall be firmly mounted. Measures to prevent vibration shall be taken where
necessary.

6 No pump, required to increase pressure in or rate of flow from a supply pipe or any fitting or
appliance connected to a supply pipe, shall be connected unless prior written approval from
QGEWC is obtained.

7 Pumps located externally shall be provided with a suitable sun shade.

2.3.2 Lift Pumps

1 Centrifugal pumps with electric motors shall be used.

2 The pumps may be either the vertical type or horizontal type and shall be directly coupled to
their electric motors.

3 Pump capacity shall be as stated in the Project Specification.

4 Where the pumping system has duty and standby pumps, the pumps shall be used
alternately.

2.3.3 Circulation Pumps

1 Circulating pumps shall comply with the relevant provisions of BS 1394: Parts 1 and 2.

2 Circulating pumps shall be suitably suppressed to prevent radio and television interference.

3 Pump capacity shall be as stated in the Project Specification.

2.3.4 Pipework Connections

1 Flexible connections shall be used so as to prevent the transmission of pump and motor
noise via pipe work.

2 All pipework connections to and from the pump shall be adequately supported and anchored
against thrust.

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3 Inlet and outlet pipework connections to lift pumps shall be fitted with gate valves complying
with the relevant provisions Clause 2.10 of this Part.

4 Inlet and outlet pipework connections to circulating pumps shall be fitted with servicing valves
complying with the relevant provisions Clause 2.9 of this Part.

2.3.5 Control

1 Pump control shall be as described in the Project Documentation.

2.4 WATER DISTRIBUTION PIPEWORK

2.4.1 General Requirements

1 Every pipe, pipe joint and connected fitting shall be capable of withstanding, without damage
or deterioration, sustained temperatures of up to 40°C for cold water installations and up to
70°C, with occasional short-term peaks of up to 100°C for heated water applications.

2 Pipes, pipe joints, pipe linings and connected fittings shall be made of materials that do not
impart taste, colour, odour or toxicity to the water nor promote or foster microbial growth
under the conditions where they are going to be installed.

3 If pipes, pipe joints or fittings are of dissimilar metals, measures shall be taken to prevent
corrosion. Dissimilar metals shall be avoided in below ground installations.

2.4.2 Pipe Materials

1 Copper pipework shall comply with the relevant provisions of BS 2871: Part 1; underground
pipes shall be to Table Y with a coating of seamless continuous PVC sheeting and above
ground pipes shall be to Table X. Copper and copper alloy tube fittings should comply with
the relevant provisions of BS 864: Part 1, Type B or BS 864: Part 2, Type A.

2 The use and installation of polyethylene pipework shall comply with the relevant provisions of
BS 1972 (above ground use), BS 6437 (general purposes) and BS 6572 (below ground use).
Copper alloy tube fittings for polyethylene pipes shall comply with the relevant provisions of
BS 864: Part 3. Joints for polyethylene pipes shall comply with the relevant provisions of BS
5114 and BS 3505.

3 The use and installation of polypropylene pipework shall comply with the relevant provisions
of BS 4991 and shall be Series 1.

4 The use and installation of unplasticized PVC (PVC-U) pipework shall comply with the
relevant provisions of BS 3505. Solvent welded joints and fittings for PVC-U pipes shall
comply with the relevant provisions of BS 4346: Part 1. Mechanical joints and fittings for
PVC-U pipes shall comply with the relevant provisions of BS 4346: Part 2. PVC-U pipework
shall only be used for cold water applications.

5 The use and installation of chlorinated PVC (CPVC) pipework shall comply with the relevant
provisions of DIN 8079 and DIN 8080.

6 Stainless steel pipe work shall comply with the relevant provisions of BS 4127.

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2.4.3 Pipe work Jointing

1 Jointing of pipes shall be in accordance with the relevant provisions of BS 6700

2 All proprietary joints shall be made in accordance with the manufacturer’s instructions.

3 Care shall be taken to establish satisfactory jointing techniques for all water service pipework.
All burrs shall be removed from the ends of the pipes and any jointing materials used shall be
prevented from entering the water system

4 All piping and fittings shall be cleaned internally and be free from particles of sand, soil metal
filings and chips etc.
5 Jointing systems using elastomeric sealing rings shall be Type W, complying with the
relevant provisions of BS 2494, and shall be obtained from the pipe manufacturer.

2.5 PIPE FIXINGS

2.5.1 General Requirements

1 Copper and stainless steel piping shall be secured by clips or brackets made from copper or
copper-alloy.

2 Steel piping shall be secured by clips or brackets made from steel, copper alloy or suitable
plastic. Copper clips or brackets shall not be used for fixing steel piping.

3 PVC-U, polyethylene, polypropylene and CPVC piping shall be secured by clips or brackets
made from suitable metal or plastic. Allowance shall be made for free lateral movement
within the clips and brackets.

4 Piping that is insulated shall be secured on clips or brackets that allow sufficient space
behind the back of the pipe and the batten or wall to which the pipe is fixed for the insulation
to be properly installed.

2.5.2 Spacing of Pipe Fixings

1 The spacings for fixings for internally located piping shall be in accordance with Table 2.1,
2.2, 2.3 and 2.4 as applicable. The figures given are based on an ambient temperature of
20°C. For other temperature ranges the pipe manufacturer should be consulted.

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Table 2.1
Maximum Spacing of Fixings for Internal Piping

Type of Piping Nominal size of Spacing on Spacing on

pipe horizontal run vertical run
(mm) (metres) (metres)
Copper (light gauge) and 15 1.200 1.800
stainless steel complying with 22 1.800 2.400
BS 2871: Part 1 or BS 4127: 28 1.800 2.400
Part 2 35 2.400 3.000
42 2.400 3.000
54 2.700 3.000
76 3.000 3.600
108 3.000 3.600
133 3.000 3.600
159 3.600 4.200

Table 2.2
Maximum Spacing of Fixings for Internal Piping

Type of Piping Nominal size of Spacing on Spacing on

pipe horizontal run vertical run
(mm) (metres) (metres)
Copper (heavy gauge) 15 1.800 2.400
complying with BS 2871: Part 2 22 2.400 3.000
28 2.400 3.000
35 2.700 3.000
42 3.000 3.600
54 3.000 3.600
76 3.600 4.500
108 3.900 4.500
133 3.900 4.500
159 4.500 5.400

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Table 2.3
Maximum Spacing of Fixings for Internal Piping

Type of Piping Nominal size of Spacing on Spacing on

pipe horizontal run vertical run
(inches) (metres) (metres)
PVC-U complying with BS 3505 3 0.530 1.060
/8
and CPVC complying with DIN 1 0.610 1.220
/2
8079 and 8080 3 0.685 1.370
/4
1 0.760 1.520
1
1/ 0.840 1.680
4
1
1/ 0.915 1.830
2

2 1.065 2.130
3 1.370 2.740
4 1.525 3.050
6 1.830 3.660

Tables 2.4
Maximum Spacing of Fixings for Internal Piping

Type of Piping Nominal size of Spacing on Spacing on

pipe horizontal run vertical run
(inches) (metres) (metres)
Polyethylene and polypropylene 3 0.300 0.500
/8
½
complying with BS 1972 or 0.400 0.800
BS 4991 respectively 3 0.400 0.800
/8
1 0.400 0.800
1
1/ 0.450 0.900
4
1
1/ 0.550 0.900
2

2 0.550 1.100
1
2/ 0.600 1.100
2

3 0.700 1.200
4 0.700 1.400

2.6 TAPS, VALVES AND PROTECTION DEVICES

2.6.1 Draw-off Taps

1 Metal bodied draw-off taps shall conform to the relevant provisions of BS 5412: Parts 1-5.

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2 Plastic bodied draw-off taps shall confirm to the relevant provisions of BS 5413: Parts 1-5.

3 Taps not fixed directly to an appliance shall be screwed into a suitable pipe fitting.

4 The fitting, or the pipe immediately adjacent to the tap, shall be firmly secured to a suitable
support so as to prevent strain on the pipe and its joints when the tap is operated.

2.6.2 Drain Taps

1 Draining taps shall comply with the relevant provisions of BS 2879.

2 Draining tap shall be of the screw down type with a removable key and shall be fixed over a
drain or have provision for discharging the water to the nearest convenient point for disposal.

2.6.3 Ball Float Valves

1 Except for interconnected tanks arranged to store water at the same level, every pipe
supplying water to a storage tank shall be fitted with a float operated valve or some other
equally effective device to control the inflow of water and maintain it at the required level.
The inlet control device shall be suitable for the particular application, taking into account the
supply pressure and the temperature of the water in the cistern.

2 When a float operated valve is used it shall either:

(a) comply with BS 1212: Part 2 or 3 and be used with a float complying with BS 1968 or
BS 2456 of the correct size corresponding to the length of the lever arm and the
water supply pressure; or
(b) where any other float operated valve or other level control device is used, it shall
comply with the performance requirements of BS 1212 where applicable to the
circumstances of its use and shall be clearly marked with the water pressure,
temperature and other characteristics for which it is intended to be used.

3 Every float operated valve shall be securely fixed to the cistern it supplies and where
necessary braced to prevent the thrust of the float causing the valve to move and so alter the
water level at which it shuts off. This water level shall be at least 25 mm below the lowest
point of the warning pipe connection or, if no warning pipe is fitted at least 50 mm below the
lowest point of the lowest over flow pipe connection

4 Every pipe taking water from a cistern of capacity exceeding 18 litres shall be fitted with a
servicing valve close to the storage cistern, tank or cylinder.

5 Every ball float valve shall be so placed that it is readily accessibly for examination,
maintenance and operation.

2.6.4 Servicing Valves

1 Servicing valves shall be located in accessible positions so as to enable the flow of water to
individual or groups of appliances to be controlled and to limit the inconvenience caused by
interruption of supply during repairs.

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2 A servicing valve shall either comply with the requirements for stopvalves as specified in
Clause 2.13 of this Part or shall be capable of withstanding a static pressure 1.5 times the
maximum pressure it will be subjected to in use, be leak tight when closed against the latter
pressure and, when installed on any pipe pressurised from the mains or on any pipe under a
static pressure exceeding 1 bar, shall be operable only by means of a key, screwdriver or
coin inserted into a slot on the valve. Screw down servicing valves shall not be of loose
jumper design. Copper alloy gate valves complying with the relevant provisions of BS 5154
may be used as servicing valves.

3 A servicing valve shall be fitted upstream of, and as close as practicable to, every float
operated valve connected to a supply pipe.

4 Pipes taking water from a storage tank of capacity exceeding 18 litres shall be fitted with a
servicing valve. The valve shall be fitted as close to the storage tank as practicable. Pipes
taking water from storage tanks with a capacity that does not exceed 18 litres shall not be
fitted with servicing valves.

2.6.5 Stop valves

1 The use and installation of stop valves shall comply with the relevant provisions of BS 6700.

2 Stop valves fitted to service pipes shall comply with the relevant provisions of the British
Standards referenced in Table 2.5.

Table 2.5

Stop valves Fitted to Service Pipes

Nominal Size of Pipe Standard

Above Ground Below Ground
50 mm or smaller BS 1010: Part 2 BS 2580
BS 2580 BS 5433
BS 5433
50 mm or larger BS 5163 BS 5163

3 Stop valve components of fittings incorporating stop valves shall comply with the requirements
for stop valves.

4 Stop valves shall be so placed that they may be readily inspected, operated and maintained.

5 When a stopvalve is installed on an underground pipe it shall be enclosed in a pipe guard or

chamber under a surface box of the correct grade for the traffic loading relevant to the
location.

2.6.6 Backflow Protection Devices

1 Every pipe through which water is supplied to a point of use or draw-off where backflow or
backsiphonage is likely to occur shall be fitted with a backflow protection device.

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2 Pipe interrupters for backflow protection shall comply with the relevant provisions of BS 6281:
Part 3.

3 Vacuum breakers for backflow protection shall comply with the relevant provisions of BS
6282: Part 2 and 3.

4 Check valves for backflow protection shall comply with the relevant provisions of BS 6282:
Part 1. Any additional installation instruction issued by the manufacturer or supplier of the
check valve shall also be complied with.

5 Combined check valve and vacuum breaker for backflow protection shall comply with the
relevant provisions of BS 6282: Part 4.

6 Double check valve assembly for backflow protection shall comply with the relevant
provisions of BS 6282: Part 1, with a draining tap complying with the relevant provisions of
BS 2879 connected between them.

2.7 PIPE INSTALLATIONS

2.7.1 General Requirements

1 Pipe runs within buildings should not be laid exactly horizontal but to a slight fall to reduce the
risk of air locks forming.

2.7.2 Pipework Expansion

1 In installations with limited straight runs and many bends and offsets, thermal movement is
accommodated automatically. In installations that do not have limited straight runs and many
bends and offsets, allowance for expansion and contraction of the pipes shall be made by
forming expansion loops, by introducing changes of direction to avoid long straight runs or by
fitting proprietary expansion joints. This is particularly important where temperature changes
are considerable and where the pipe material has a relatively large coefficient of expansion.

2 The maximum length of a straight run for each different pipe material to be used shall be
detailed in the Project Specification or shown on the Project Drawings.

2.7.3 Pipe Sleeves

1 Where a pipe enters a building it shall be accommodated in a sleeve that has previously
been solidly built-in and the space between the pipe and the sleeve shall be filled with non-
hardening, non-cracking, water-resistant material for a minimum length, of 150 mm at both
ends to prevent the passage of water, gas or insects.

2.7.4 Concealed Pipework

1 Concealed pipe work shall be housed in properly constructed builders work ducts or wall
chases and have access for maintenance and inspection.

2 Ducts and chases should be constructed as the building structure is erected and should be
finished smooth to receive pipe fixings.

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3 No pipe or joint in or under a building shall be embedded in any wall or solid floor or in any
material below a solid floor at ground level except for the following:

(a) the enclosing of any pipe and associated pipe joints in a purpose made duct or chase
in a solid floor in such a way that the pipe and pipe joints can be exposed for
purposes of examination, repair or replacement without endangering the structural
integrity of the building
(b) the enclosing of any pipe and associated pipe joints in a purpose made chase in a
solid wall (but not within the cavity of a hollow wall) in such a way that the pipe and
pipe joints can either be capped off and isolated or be exposed for purposes of
examination, repair or replacement without endangering the structural integrity of the
building
(c) the enclosing of any pipe and associated pipe joints in any internal wall that is not a
solid wall
(d) the enclosing of any pipe within a purpose made pipe sleeve or duct in or under any
solid floor in such a way that the pipe may be removed and replaced; for pipes laid in
such a way, there shall be an inspection access point at each joint.

4 No pipe or pipe joint shall be located under floorboards or a suspended floor, at ground floor
level unless every pipe and pipe joint is accessible for examination.

5 Where access panels are formed in floor panels of structural chipboard or plywood, the
structural stability of the building shall not be affected.

6 All pipe laid in ducts shall be adequately supported by clipping as specified in Table 2.1.

2.8 INSULATION OF WATER PIPES

2.8.1 General

1 Thermal insulating materials shall comply with BS 5422 and BS 3958 where applicable.

2 Thermal insulating materials shall be applied in accordance with the manufacturer’s

recommendations. They shall be kept dry before, during and after application, except for
water which may be required for the purpose of mixing. Gaps shall not be left at the joints of
the insulating materials.

3 Where necessary, the insulating material shall be resistant to, or protected by a suitable
covering against, mechanical damage, rain, moist atmosphere, groundwater and vermin.

4 Examples of suitable materials of insulating purposes are:

(a) polyurethane foam

(b) foamed or expanded plastics
(c) corkboard
(d) amoliated vermiculite.

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2.8.2 Application

1 While insulating material shall be continuous over pipes and fittings, it shall be finished in
such a manner as to allow access to valves for operation.

2 Where cold water pipes pass through areas of relatively high dew point, e.g. habitable areas,
they shall be insulated to prevent condensation forming on them.

3 Pipes in hot water supply systems that exceed the maximum lengths given in Table 2.6 shall
be thermally insulated in accordance with BS 5422.

Table 2.6
Maximum Permissible Lengths of Un insulated Hot Water Pipes

Outside diameter of pipes Maximum length

(mm) (m)
12 20
Over 12 up to and including 22 12
Over 22 up to and including 28 8
Over 28 3

2.9 MISCELLANEOUS

2.9.1 Electrical Work Related to Plumbing Works

1 Electrical works related to plumbing works shall be done in accordance with the relevant
provisions of BS 7671 and the requirements of QGEWC.

2.9.2 Water Meter Cabinet

1 Water meter cabinets shall comply with the Rules and Regulations Guide for Plumbing
Works prepared by QGEWC.

2 Water meter cabinets shall be located in an easily accessible place as approved by QGEWC.

END OF PART

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3 PLUMBING PIPEWORK IN TRENCHES ................................................................................ 2

3.1 GENERAL ................................................................................................................................ 2

3.1.1 Scope 2
3.1.2 References 2
3.2 PIPES AND FITTINGS ............................................................................................................ 3
3.2.1 General Requirements 3
3.2.2 Pipe Materials 3
3.3 PIPEWORK JOINTING ............................................................................................................ 3
3.3.1 General Requirements 3
3.4 PIPE LAYING ........................................................................................................................... 4
3.4.1 General 4
3.4.2 Bedding 4
3.4.3 Concrete Protection to Pipes 5
3.4.4 Completion of Pipe Surround 6
3.4.5 Backfilling 6
3.4.6 Protective Coatings 6
3.4.7 Pipes under Buildings 6
3.4.8 Avoidance of Contamination 7
3.4.9 Restraint of Pipes 7
3.4.10 Testing of Pipework 7
3.4.11 Surface Boxes 7

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3 PLUMBING PIPEWORK IN TRENCHES

3.1 GENERAL

3.1.1 Scope

1 This Part specifies the requirements for pipes and fittings for below ground plumbing works.

2 Related Sections and Parts are as follows:

This Section
Part 1 General
Part 2 Water Distribution
Part 6 Commissioning of Systems

Section 1 General
Section 5 Concrete
3.1.2 References

1 The following standards are referred to in this Part:

BS 743........................Materials for damp-proof courses.
BS 864 .......................Capillary and compression fittings for copper tubes and copper alloy.

BS 882........................Aggregates from natural sources for concrete

BS 1142......................Fibre building boards
BS 2494 Specification for elastomeric joint rings for pipework and pipeline.
BS 2871......................Specification for copper and alloy tubes.
BS 3505......................Specification for unplasticized polyvinyl chloride (PVC-U) pressure
pipes for cold potable water.
BS 4127......................Specification for light gauge stainless steel tubes.
BS 4346......................Joints and fittings for use with unplasticized PVC pressure pipes.

BS 4772......................Ductile iron pipes and fittings.

BS 4991......................Propylene copolymer pressure pipe.
BS 5114......................Specification for performance requirements for joints and compression
fittings of use with polyethylene pipes.
BS 6076......................Tubular polythene film for use as a protective sleeving for buried iron
pipes and fittings.
BS 6572......................Specification for blue polyethylene pipes up to nominal size 63 for
bellow ground use for potable water.
BS 6700......................Specification for design, installation, testing and maintenance of
services supplying water supplying water for domestic use within
buildings and the curtilages.

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3.2 PIPES AND FITTINGS

3.2.1 General Requirements

1 Pipes shall have adequate strength to meet the loading requirements, be sufficiently robust to
withstand site handling and be sufficiently durable to remain watertight for the anticipated life
of the system. Pipes and joints should remain sufficiently water tight to prevent the ingress of
ground water.

2 Every pipe, pipe joint and connected fitting shall be capable of withstanding, without damage
or deterioration, sustained temperatures of up to 65°C when operating under normal working
pressures.

3 Pipe materials, fittings, linings and jointing materials shall impart no taste, colour, odour or
toxicity to the water nor promote or foster the microbial growth under the conditions where
they are going to be installed.

4 If pipes, pipe joints or fittings are of dissimilar metals, measures shall be taken to prevent
corrosion. Contact between pipework components of dissimilar metals shall be avoided in
below ground installations.

3.2.2 Pipe Materials

1 Copper pipework shall comply with the relevant provisions of BS 2871: Part 1, Table Y,
coated with seamless continuous PVC sheeting. Copper and copper alloy tube fittings should
comply with the relevant provisions of BS 864: Part 2.

2 The use and installation of polyethylene pipework shall comply with the relevant provisions of
BS 6572. Copper alloy tube fittings for polyethylene pipes shall comply with the relevant
provisions of BS 864: Part 3, Joints for polyethylene pipes shall comply with the relevant
provisions of BS 5114 and BS 3505.

3 The use and installation of polypropylene pipework shall be in accordance with the relevant
provisions of BS 4991 and shall be Series 1.

4 The use and installation of unplasticized PVC pipework shall comply with the relevant
provisions of BS 3505. Solvent welded joints and fittings for PVC-U pipes shall comply with
the relevant provisions of BS 4346: Part 1. Mechanical joints and fittings for PVC-U pipes
shall comply with the relevant provisions of BS 4346: Part 2.

5 Ductile iron pipework shall comply with the relevant provisions of BS 4772.

6 Stainless steel pipework shall comply with the relevant provisions of BS 4127.

3.3 PIPEWORK JOINTING

3.3.1 General Requirements

1 Jointing of pipes shall be in accordance with the relevant provisions of BS 6700.

2 All proprietary joints shall be made in accordance with the manufacturer’s instructions.

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3 Care shall be taken to establish satisfactory jointing techniques for all water service pipework.
All burrs shall be removed from the ends of the pipes and any jointing materials used shall be
prevented from entering the water system

4 All piping and fittings shall be cleaned internally and be free from particles of sand, soil metal
filings and chips etc.

5 Jointing systems using elastomeric sealing rings shall be Type W, complying with the
relevant provisions of BS 2494, and shall be obtained from the pipe manufacturer.

3.4 PIPE LAYING

3.4.1 General

1 Where socketed pipes are required to be laid on a granular or sand bed, or directly on a
trench bottom, joint holes shall be formed in the bedding material or final excavated surface
to ensure that each pipe is uniformly supported throughout the length of its barrel and to
enable the joint to made.

2 Pipes shall be laid on setting blocks only where a concrete bed or cradle is used.

3 Where pipes are required to be bedded directly on the trench bottom, the final excavated
surface shall be trimmed and levelled to provide even bedding of the pipeline and shall be
free from all extraneous matter that may damage the pipe, pipe coating, or sleeving. Where
rock is encountered, the trench shall be cut at least 150 mm deeper than other ground and
made up with well compacted selected fill material.

4 No protective cap, disc or other appliance on the end of a pipe or fitting shall be removed
permanently until the pipe or fitting which it protects is about to be jointed. Pipes and fittings,
including any lining or sheathing, shall be examined for damage and the joint surfaces and
components shall be cleaned immediately before laying.

5 Suitable measures shall be taken to prevent soil or other material from entering pipes, and to
anchor each pipe to prevent flotation or other movement before the Works are complete.

6 Where pipeline marker tape is specified, it shall be laid between 100 mm and 300 mm above
the pipe.

3.4.2 Bedding

1 Bedding for pipes shall be constructed by spreading and compacting granular bedding
material over the whole width of the pipe trench. After the pipes have been laid, additional
material shall, if required, be placed and compacted equally on each side of the pipe, and
where practicable, this shall be done in sequence with the removal of the trench supports.

2 Unless otherwise detailed in the Project Documentation, bedding material shall be in

accordance with Table 3.1

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Table 3.1
Bedding Material

Pipe Diameter Bedding

up to 65 mm Sand

65 - 100 mm 10 mm single sized aggregate

10 or 14 mm single sized or 14-15

100 - 200 mm
mm graded aggregate
10, 14 or 20 mm single sized or 15-
Over 200 mm
5 or 20-5 mm graded aggregate.

3 Nominal single sized aggregate and graded aggregate shall comply with Table No. 4 of BS
882.

4 Sand for bedding material shall comply with the relevant provisions of BS 882.

5 Bedding systems other than those specified above may be allowed upon approval of the
Engineer or as recommended by the pipe manufacturer.

3.4.3 Concrete Protection to Pipes

1 Pipes to be bedded on or cradled with concrete shall be supported on precast concrete

setting blocks. The top face of each block shall be covered with two layers of compressible
packing complying with BS 743.

2 Concrete provided as a protection to pipes shall be Grade C20, placed to the required depth
in one operation.

3 Where pipes with flexible joints are used, concrete protection shall be interrupted over its full
cross-section at each pipe joint by a shaped compressible filler of bitumen impregnated
insulating board to BS 1142 or equally compressible material. The thickness of the
compressible filler shall be in accordance with Table 3.2.

Table 3.2
Thickness of Compressible Filler

Nominal bore of pipe (mm) Thickness of compressible filler (mm)

up to 300 13
Over 300 and up to 600 25
Over 600 and up to 1200 38

4 Rapid hardening cement shall not be used in concrete for the protection of plastics pipe.

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5 Plastics pipes shall be wrapped with a layer of plastic sheeting complying with a composition
in accordance with Clause 3 of BS 6076 and a nominal thickness of 125 microns before
being surrounded by concrete.

6 Concrete work shall comply with the relevant provisions of Section 5, Concrete.

3.4.4 Completion of Pipe Surround

1 Fill material shall, where required, be placed and compacted over the full width of the trench
in layers not exceeding 150 mm before compaction, to a finished thickness of 250 mm above
the crown of the pipes.

3.4.5 Backfilling

1 Backfilling shall, wherever practicable, be undertaken immediately the specified operations

preceding it have been completed. Backfilling shall not, however, be commenced until the
parts of the Works to be covered have achieved a strength sufficient to withstand all loading
imposed thereon.

2 Backfilling around existing structures shall be undertaken in such manner as to avoid uneven
loading or damage.

3 Filling material to excavations shall be deposited in layers not exceeding 250 mm

unconsolidated thickness and compacted to 95% modified proctor.

4 Where the excavations have been supported and the supports are to be removed, these,
where practicable, shall be withdrawn progressively as backfilling proceeds in such a manner
as to minimise the danger of collapse. All voids formed behind the supports shall be carefully
filled and compacted

3.4.6 Protective Coatings

1 Coatings, sheathings or wrappings shall be examined for damage, repaired where

necessary, and made continuous before trench excavations are backfilled.

3.4.7 Pipes under Buildings

1 Where a pipe has less than 300 mm of cover under a load bearing slab, it should be
surrounded with concrete as an integral part of the slab. Where possible, the concrete
surround shall be poured at the same time as the slab. The surround shall be tied to the slab
with nominal steel reinforcement placed vertically with turned over ends.

2 No provision for pipe flexibility along the concrete surround shall be made, unless an
expansion joint is included in the slab. A construction joint should be included in the
surround at that point which must also coincide with a pipe joint.

3 In normal, stable ground conditions, and with 300 mm or more of cover to the pipeline
beneath the slab, a total granular surround can be used as a pipe bedding. Refer to Clause
3.4.2 for bedding specification.

4 Flexibility shall be incorporated into the pipeline as it leaves any concrete surround.

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5 Where plastic pipes are to be surrounded in concrete, Clause 3.4.3 of this Part shall be
complied with.

3.4.8 Avoidance of Contamination

1 No pipe shall be laid or installed near a sanitary manhole, cesspool, septic tank, soakaway,
refuse pit or other feature likely to cause the water to become contaminated and/or cause
deterioration to the pipe material.

2 Any pipe that crosses over a sewer shall be laid so that there is at least 600 mm clearance
between the pipe barrels. Any pipe that lies adjacent to a sewer shall be laid so that there is
at least 3m between the barrels. Plumbing pipes shall not be laid below sewers.

3 Where the above criteria cannot be met, and with the approval of the Engineer in writing, the
pipe shall be encased in concrete. The limit of the concrete encasement shall be determined
on site by the Engineer. No breaks in the concrete encasement shall be made at joints. If the
concrete encasement extends over one or more joints it shall be treated as a beam and
reinforced appropriately; in such cases, the Contractor shall prepare reinforcement details
with supporting calculations and submit them to the Engineer for approval.

4 Where it is necessary to determine the extent of contamination, the Contractor shall arrange
for soil samples to be taken and tested. The locations at which soil samples are taken and
the number of samples to be taken shall be determined by the Engineer.

3.4.9 Restraint of Pipes

1 Except where the method of jointing and normal trench backfill are adequate to prevent
longitudinal movement, Grade C20 concrete thrust blocks cast in contact with undisturbed
ground shall be constructed at changes in direction, junctions and blank ends.

2 Any additional excavation required to accommodate thrust blocks shall be carried out after
the bend or branch is in position and the thrust face shall be trimmed back to remove all
loose or weathered material immediately prior to concreting.

3 Thrust blocks shall be required to develop adequate strength before any internal pressure is
applied to the pipeline.

4 Where plastic pipes are to be surrounded in concrete, Clause 3.4.3. of this Part shall be
complied with.

3.4.10 Testing of Pipe work

1 Pressure tests shall be carried out on below ground plumbing pipes. Test procedures are
detailed in Part 6 of this Section.

3.4.11 Surface Boxes

1 Surface boxes shall be provided to give access to operate valves.

END OF PART

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4 COLD WATER STORAGE....................................................................................................... 2

4.1 GENERAL ................................................................................................................................ 2

4.1.1 Scope 2
4.1.2 System Description 2
4.1.3 Submittals 3
4.1.4 Quality Assurance 3
4.2 TANK CONSTRUCTION.......................................................................................................... 4
4.2.1 General Requirements 4
4.3 FILTERS .................................................................................................................................. 4
4.3.1 General Requirements 4

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4 COLD WATER STORAGE

4.1 GENERAL

4.1.1 Scope

1 This Part specifies the requirements for cold water storage systems.
Related Sections and Parts are as follows:

This Section
Part 1 General
Part 2 Water Distribution
Part 6 Commissioning of Systems

Section 1 General
4.1.2 System Description

1 Cold water storage tanks shall impart no taste, colour, odour or toxicity to the water nor
promote or foster microbial growth under the conditions where the tank is going to be
installed.

2 The tank shall be supported on a firm level base capable of withstanding the weight of the
tank when filled with water to the rim.

3 Where possible and practicable, tanks shall be positioned in locations where they can be
easily accessed for inspection, cleaning and maintenance.

4 Tanks positioned outside buildings shall be provided with a suitable shade.

5 Where two or more tanks are coupled together in series, the inlet and outlet shall be at
opposite ends of the series.

6 Tanks shall not be buried or sunk in the ground without the prior approval from the Qatar
General Electricity & Water Corporation (QGEWC).

7 Each tank shall be fitted with a 25 mm diameter outlet for connection to a washout pipe. The
outlet shall be flush with the bottom of the tank. The floor of tank shall be laid at a slight fall
towards the outlet. A washout pipe and a stop-tap shall be fitted to the outlet. The washout
pipe shall be run to a point as detailed in the Documentation.

8 Every pipe supplying water to a cold water tank shall be fitted with a float operated valve or
some other equally effective device, as detailed in Part 2 of this Section, to control the inflow
of water and maintain it at the required level. The float valve shall be securely fixed to the
tank and be installed so that the level of water in the tank when full under normal conditions
is not less that 25 mm below the level of the warning or overflow pipe. A stopvalve complying
with the relevant provisions of Part 2 of this Section shall be fitted to the pipework
immediately upstream of the float valve to shut off supply of water to that valve.

9 Distribution pipes for tanks shall be connected so that the lowest point of the outlet is not
less than 50 mm above the bottom of the tank.

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10 Connections to distribution pipes feeding hot water apparatus shall be set at a level of at
least 25 mm above connectors to pipes feeding cold water outlets.

11 Any tank with an effective capacity of up to 4500 litres shall be fitted with a warning type
overflow pipe. Tanks with an effective capacity exceeding 4500 litres shall be fitted with one
or more overflow pipes. For capacities exceeding 4500 litres, either the lowest pipe will be a
warning type overflow pipe, or a device shall be fitted that gives an audible or visual alarm
when water in the tank reaches a level at least 50 mm below the lowest point of the lowest
overflow pipe.

12 The invert level of the overflow pipe shall be not less than 75 mm below the invert level of
the inlet pipe.

13 Overflow pipes shall be made of a rigid corrosion resistant material. No overflow or warning
pipe shall rise in level outside the cistern.

14 Warning type overflow pipes shall discharge water immediately the water in the tank reaches
the overflow level and shall discharge to a conspicuous position; these shall be outside the
building where appropriate.

15 The overflow pipe or pipes should be able to convey water away from the tank at a rate
equal to or greater than the rate of flow of water into the tank. Notwithstanding, warning type
overflow pipes shall be not be less than 20 mm in diameter.

4.1.3 Submittals

1 The Contractor shall provide manufacturers’ specifications for all items to be supplied under
this Part.

2 The Contractor shall provide design calculations and shop drawings for the fabrication and
erection of sectional type storage tanks, unless otherwise detailed in the manufacturer’s data
sheets.

3 The Contractor shall provide design calculations and shop drawings for the fabrication and
erection of tank support assemblies unless otherwise detailed in the manufacturer’s data
sheets.

4 The submittal shall include catalogue pages, erection descriptions and manufacturer data.

5 Unless the positions of the discharges for the overflow pipes are described in the Project
Documentation, the Contractor shall submit his proposals for their positioning to the
Engineer for approval.

4.1.4 Quality Assurance

1 Fabricated cold water storage tanks and associated equipment shall be provided by
experienced and approved manufacturers and fabricators as designated in the Project
Documentation and to the written approval of the Engineer.

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4.2 TANK CONSTRUCTION

4.2.1 General Requirements

1 Cold water storage tanks shall be constructed in accordance with the Rules and Regulations
for Plumbing Works as prepared by QGEWC.

2 The tanks shall be constructed with one of the following materials/methods:

(a) fibre glassed reinforced plastic

(b) GRP sectional panel
(c) reinforced concrete (underground storage).

3 Tanks smaller than 6m in length shall have a removable close-fitting vermin proof cover.
Tanks greater than 6m in length shall have two or more securable manhole covers.

4.3 FILTERS

4.3.1 General Requirements

1 Filters shall be of a type as detailed in the Project Documentation.

2 As a minimum, filters shall be able to remove the following:

(a) harmful bacteria

(b) giardia cysts
(c) chlorine tastes and odours
(d) sediment to 1 micron.

3 Filters shall have the following characteristics:

(a) inhibit the growth of bacteria and other micro-organisms

(b) clean and maintain.

4 Filters shall not unduly affect distribution rates.

END OF PART

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5 HOT WATER STORAGE ......................................................................................................... 2

5.1 GENERAL ................................................................................................................................ 2
5.1.1 Scope 2
5.1.2 References 2
5.1.3 System Description 3
5.1.4 Identification Plate 3
5.1.5 Submittals 3
5.1.6 Safety 3
5.1.7 Quality Assurance 3
5.2 HOT WATER STORAGE TANKS ............................................................................................ 3
5.2.1 Tank Construction 3
5.2.2 Pressure and Non-Pressure Hot Water Storage Tanks 4
5.3 LOW CAPACITY ELECTRIC IMMERSION HEATER SYSTEMS............................................ 4
5.3.1 System Description 4
5.3.2 Immersion Heaters 4
5.3.3 Heating Element 4
5.3.4 Pressure Relief 5
5.3.5 Pipework 5
5.3.6 Temperature and Temperature Control 5
5.3.7 Electric Control 5
5.3.8 Pilot Light 5
5.4 CALORIFIER SYSTEMS ......................................................................................................... 5
5.4.1 System Description 5
5.4.2 Storage Tank Construction 6
5.4.3 Heat transfer System 6
5.4.4 Tube Batteries 6
5.4.5 Electric Heating Elements 6
5.4.6 Calorifier Mountings 7
5.4.7 Thermometers 7
5.4.8 Altitude or Pressure Gauges 7
5.4.9 Pressure Relief Valve 7
5.4.10 Combined Pressure and Vacuum Gauges 7
5.4.11 Vacuum Breaker 7
5.5 CISTERN TYPE WATER HEATERS ....................................................................................... 8
5.5.1 General Requirements 8
5.6 PRESSURE CONTROL ........................................................................................................... 8
5.6.1 General Requirements 8

5.7 VENTILATION .......................................................................................................................... 8

5.7.1 Storage Tanks 8
5.7.2 Indirect Calorifier Systems 9
5.8 EXPANSION VESSEL ............................................................................................................. 9
5.8.1 General Requirements 9
5.9 INSULATION ............................................................................................................................ 9
5.9.1 General 9

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5 HOT WATER STORAGE

5.1 GENERAL

5.1.1 Scope

1 This Part specifies the requirements for hot water storage systems.

2 Related Sections and Parts are as follows: This Section:

Part 1 General
Part 2 Water Distribution
Part 3 Commissioning of Systems Section 1General

5.1.2 References

1 The following standards are referred to in this Part:

BS 21..........................Pipe threads for tubes and fittings where pressure tight joints are
made on threads (metric dimensions)
BS 417........................Galvanized mild steel cisterns and covers, tanks and cylinders
BS 699........................Specification for copper direct cylinders for domestic purposes
BS 759........................Valves, gauges and other safety fittings for applications to boilers and
to piping installations for and in connection with boilers
BS 853........................Calorifiers and storage vessels for central heating and hot water
supply
BS 1566......................Copper indirect cylinders
BS 1780......................Bourdon tube pressure and vacuum gauges
BS 1894......................Design and construction of electric boilers of welded construction

BS 2871......................Copper and copper alloy. Tubes

BS 3198......................Specification for copper hot water storage combination units for
domestic purposes
BS 3274......................Tubular heat exchangers for general purposes
BS 3456......................Specification for safety of household and similar electrical appliances

BS 3599......................Electrical controls for domestic appliances

BS 4213......................Cold water storage and combined feed and expansion cisterns
(polyolefin of olefin copolymer) up to 500 litres capacity for domestic
purposes
BS 4504......................Circular flanges for pipes, valves and fittings (PN designated)
BS 4814......................Expansion vessels using an internal diaphragm, for sealed hot water
systems
BS 6144......................Expansion vessels using an internal diaphragm, for hot water
unvented supply systems
BS 6282......................Devices with moving parts for the prevention of contamination of water
by backflow
BS 6283......................Safety devices for use in hot water systems

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5.1.3 System Description

1 Storage-type water heaters shall be used for the provision of hot water services.

2 The hot water storage tank shall be constructed so that water delivered is not liable to
become contaminated to the extent that it is hazardous to health or unfit for its intended use.

3 The capacity of the storage tank shall be as stated in the Project Documentation.

5.1.4 Identification Plate

1 All hot water storage tanks shall have an engraved or cast-metal identification plate clearly
showing the following:

(a) manufacturer’s name and address

(b) date of manufacture
(c) hydraulic test pressures
(d) maximum working pressure
(e) rated capacity and output

5.1.5 Submittals

1 The Contractor shall provide manufacturers’ specifications for all items to be supplied under
this Part.

2 The Contractor shall provide design calculations and shop drawings for the fabrication and
erection of tank support assemblies (free standing or wall mounted), unless otherwise
detailed in manufacturer’s data sheets.

3 The submittal shall include catalogue pages, erection descriptions and manufacturer’s data.

5.1.6 Safety

1 All safety requirements specified by the Qatar General Electricity & Water Corporation, the
standard to which the hot water storage tank is constructed and the manufacturer shall be
strictly adhered to. If the requirements specified by any of these three parties differ or conflict
in any respect, the most stringent requirement, as defined by the Engineer, shall be followed.

5.1.7 Quality Assurance

1 Fabricated hot water storage tanks and associated equipment shall be provided by
experienced and approved manufacturers and fabricators as designated in the Project
Documentation and to the written approval of the Engineer.

5.2 HOT WATER STORAGE TANKS

5.2.1 Tank Construction

1 Hot water storage tanks constructed of copper shall comply with the relevant provisions of
BS 699, BS 853, BS 1566 and BS 3198, as applicable.

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2 Hot water storage tanks may be constructed of materials other than copper provided that
they are corrosion resistant, glass lined or porcelain lined and provided that they are
approved by the Qatar General Electricity & Water Corporation. Appropriate British
Standards, or equivalent, specifying the construction of storage tanks covered in this
paragraph shall be supplied by the Contractor to support the required approval.

3 Tanks shall incorporate replaceable, sacrificial magnesium anodes for cathodic protection if
directed in the Project Documentation.

5.2.2 Pressure and Non-Pressure Hot Water Storage Tanks

1 The hot water tanks shall be non-pressure or pressure as directed in the Project
Documentation.

2 Non-pressure hot water storage tanks shall have ventilation systems as described in Clause
5.7 of this Part.

3 For non-pressure hot water storage tanks, no hose or other connection shall be made to the
outlet of a non-pressure, storage type, water heater and under no circumstances shall the
outlet be controlled by a tap or valve.

4 For pressure systems it shall be verified that the heater is suitable for the proposed supply
pressure.

5 Suitable arrangements to accommodate expansion of the heated water shall be made for
pressure hot water storage tanks. See Clause 5.8.

5.3 LOW CAPACITY ELECTRIC IMMERSION HEATER SYSTEMS

5.3.1 System Description

1 A low capacity (domestic) electrical immersion heater system involves an electric heating
element placed within a hot water storage tank. Such heaters shall be used for the provision
of hot water services for applications where the demand for hot water is small (i.e. kitchens
and bathrooms, etc.).

2 Electric immersion heaters shall be of the vented or unvented type, as directed in the Project
Documentation.

3 Tank construction shall be in accordance with Clause 5.2 of this Part.

5.3.2 Immersion Heaters

1 Electric immersion heaters shall comply with the relevant provision of BS 3456.

5.3.3 Heating Element

1 The material of the heating element shall be a high-grade stainless steel. Other materials
with high corrosion resistance may be used if approved by the Engineer.

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5.3.4 Pressure Relief

1 An expansion relief valve shall be fitted in the cold feed to the hot water storage tank and no
valves (other than a drainage tap) shall be fitted between the expansion relief valve and the
storage tank. The expansion or pressure relief valve setting shall be the maximum working
pressure plus 0.5 to 1.5 bar.

5.3.5 Pipework

1 For tanks with a capacity of 25 litres or greater, the size of the hot water outlet pipe shall be
smaller than the cold water inlet pipe.

5.3.6 Temperature and Temperature Control

1 Unless otherwise detailed in the Project Specification, the temperature of the stored water
shall never exceed 65°C.

2 Every hot water storage tank shall be fitted with a thermostat acting on the heat input. In
addition, every hot water storage tank of capacity greater than 150 litres shall be fitted with
an automatic control capable of stopping and starting the heat input to the stored water at
pre-set times.

5.3.7 Electric Control

1 All electrical controls, including thermostats, cut-outs and switches, shall comply with the
relevant provisions of BS 3599.

5.3.8 Pilot Light

1 The heater shall incorporate a clearly visible pilot light.

5.4 CALORIFIER SYSTEMS

5.4.1 System Description

1 Calorifier systems shall be used for hot water applications with a high hot water demand
(hospitals, schools, etc.).

2 Calorifier systems shall be storage type systems and shall be the direct or indirect type.

3 Direct systems involve directly heating the water that will enter the hot water distribution
system. This is done by circulating the water in the hot water storage tank through a heat
transfer system (boiler). When inside the boiler, the water is directly exposed to the heat
source.
4 Direct type systems shall be designed for gravity circulation. Flow and return pipes between
the boiler and the storage tank shall run as directly as possible and shall be not less than 25
mm diameter. The storage tank shall be located at a sufficient height above the boiler to
give adequate circulation.

5 Indirect systems involve heating water by means of routing steam or hot water through the
hot water storage tank via a tube battery. A heat transfer system (boiler) heats up the water
or generates the steam that is conveyed through the tube battery that runs through the water

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storage tank. On exiting the hot water storage tank, the tube returns to the boiler. The hot
water/steam does not come into contact with the water that will enter the hot water
distribution system.

6 Indirect systems shall incorporate a sealed or vented primary circuit as directed in the
Project Documentation. Primary circuits comprise the boiler, the primary heat exchanger in
the hot water storage tank and the interconnecting and associated pipework.

7 Calorifiers shall incorporate electrical immersion heaters if required by the Project

Documentation.

5.4.2 Storage Tank Construction

1 Storage tank construction shall be in accordance with Clause 5.2 of this Part and shall be
horizontal or vertical type.

2 The storage tanks shall comply with the relevant provisions of BS 853 Grade B for shell
operating pressures not exceeding 4.5 bar and temperatures not exceeding 90 oC.

3 They shall be supported on fabricated feet attached to the shell or on separate cradles or
frames. Sheet lead pads shall be fitted between shell bearing surfaces and any separate
supports.

4 They shall have screwed and/or flanged connections complying with the

relevant provisions of BS 21 and BS 4504.

5 They shall be delivered with all connections capped or blanked-off.

5.4.3 Heat transfer System

1 Boilers shall comply with the relevant provisions of BS 1894 unless otherwise specified in the
Project Documentation.

5.4.4 Tube Batteries

1 Tube battery shall be design shall comply with the relevant provisions of BS 3274 Type 2.

2 Tubes batteries shall be of solid drawn copper to BS 2871 Part 3.

3 Tube batteries shall be fixed or removable, as stated in the Project Documentation. If fixed
type tube batteries are to be used, the storage tank shall include an access opening for
battery maintenance purposes.

5.4.5 Electric Heating Elements

1 Electric immersion heaters shall be complete with an integral thermostatic controller.

2 A minimum of two heating elements shall be provided in each calorifier. The first shall be at
low level and the second one approximately two thirds from the base. The ratings of the
elements shall be such that the lower heating element shall provide a minimum heat-up time

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of two (2) hours. The higher heating element shall be equivalently rated for a heat up time of
four (4) hours.

3 The material of the heating element shall be a high-grade stainless steel. Other materials
with high corrosion resistance may be used if approved by the Engineer.

5.4.6 Calorifier Mountings

1 The calorifiers shall have connections for hot water system controls and for open systems, a
vent pipe connection.

2 The calorifiers shall also have an emptying/drain cock of the bronze gland pattern with hose
union connection and malleable iron lever handle. The cock shall be fitted to the calorifier
shell lowest point to ensure complete removal of water content and shall be of adequate size
(25 mm diameter minimum).
5.4.7 Thermometers

1 The calorifier shall incorporate a stainless steel dial type mercury thermometer. The dial shall
be 100 mm diameter (minimum), white faced with a black figured scale calibrated from 0 oC
to 120 oC with divisions at 1 oC intervals and numbered at 10 oC intervals with bold figures.
The thermometer shall be complete with an integral vertical or centre stem and separate
pocket to suit the immersion position.

5.4.8 Altitude or Pressure Gauges

1 The calorifier shall incorporate a stainless steel dial type altitude or pressure gauges. The
dial shall be 100 mm diameter (minimum), white faced with a black figured scale, calibrated
both in bar and metre head, to approximately twice the working pressure, complete with
lever handle gauge cock and adjustable red dial pointer set at normal working pressure or
head of the system. The gauge shall generally to comply with the relevant provisions of BS
1780 Part 2.

5.4.9 Pressure Relief Valve

1 The calorifier shall incorporate an enclosed spring loaded pattern pressure relief valve fitted
with a padlock. The valve shall incorporate a copper discharge pipe running clear of any
insulation and terminating 150 mm from floor level adjacent to a drain gully position. The
pressure relief valve shall comply with the relevant provisions of BS 759.

5.4.10 Combined Pressure and Vacuum Gauges

1 The calorifier shall incorporate a stainless steel dial type combined pressure and vacuum
gauge. The dial shall be 100 mm diameter (minimum), white faced with a black figure scale,
calibrated to suit steam chest pressure, complete with U pattern siphon and lever handle
gauge cock. The gauge shall generally to comply with the relevant provisions of BS 1780
Part 2.

5.4.11 Vacuum Breaker

1 Vacuum breakers shall comply with the relevant provisions of BS 6282 Part 2 or 3.

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2 Every vacuum breaker valve shall be of the same nominal size as the pipe on which it is
connected.

3 Each vacuum breaker shall be installed at a height of not less than 150 mm above the
overflowing level of the receiving cistern tank or appliance, when the later is fixed or not less
than 300 mm above the outlet of the fitting in all other cases.

5.5 CISTERN TYPE WATER HEATERS

5.5.1 General Requirements

1 Cistern type water heaters shall comply with BS 417, BS 4213 and BS 4814, as appropriate.

2 The cistern shall comply with all the requirements for a cold water storage cistern.

3 The feed cisterns shall have a capacity at least equal to that of the hot water storage tank.

4 The feed cistern shall be situated at a height that will ensure a satisfactory flow of water at
the highest point of discharge.

5.6 PRESSURE CONTROL

5.6.1 General Requirements

1 Whether hot or cold water is involved, it shall be ensured that no part of the system bursts
due to the hydraulic pressures to which it is subjected. The pressures in the system shall
never exceed the safe working pressures of the component parts. The maximum working
pressure in a sealed primary circuit shall not exceed 3 bar but it shall be capable of passing a
test at 1.5 times the working pressure at the working temperature. The maximum working
pressure in an unvented hot water storage tank or secondary circuit shall not exceed 6 bar.

2 Where necessary the supply pressure shall be controlled by using break cisterns or by
pressure reducing valves. If the supply to a storage type water heater is through a pressure
reducing a valve of the type that permits backflow, the working pressure in the system shall
be assumed to be the maximum pressure upstream of the valve. Where reliance is placed
on pressure reducing valves to limit the maximum working pressure, these shall comply with
BS 6283, Part 4.

3 Where unvented storage type water heaters are used, an expansion relief valve shall be
fitted in the cold feed to the heater or hot water cylinder and no valves (other than a draining
tap) shall be fitted between the expansion relief valve and the heater or hot water cylinder.

4 In every case, including sealed primary circuits, the expansion or pressure relief valve setting
shall be maximum working pressure plus 0.5 bar to 1.5 bar. This also applies to combined
temperature and pressure relief valves.

5.7 VENTILATION

5.7.1 Storage Tanks

1 With ventilated hot water storage tanks, an open vent pipe shall run from the top of the hot
water storage tank to a point above the cold water storage tank, into which it shall discharge.

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No valves shall be fitted to any vent pipe. The vent pipe shall rise continuously from its point
of connection to the hot water storage tank to its point of discharge. The vent pipe shall be
19mm diameter or greater.

5.7.2 Indirect Calorifier Systems

1 Indirect calorifier systems incorporating vented primary circuits shall have vent route
connecting the flow connection on the calorifier to the vent pipe above the expansion cistern
and a feed water route from a point near the bottom of the expansion cistern to the return
connection on the calorifier. These routes shall be independent.

5.8 EXPANSION VESSEL

5.8.1 General Requirements

1 An expansion vessel shall be connected to the cold feed supply pipe to unvented hot water
storage vessels. There shall be no valve on the pipe between the expansion vessel and the
storage vessel.

2 On indirect systems incorporating sealed primary circuits, an expansion vessel shall be

connected to the section of pipework routing the water from the storage tank and boiler.
3 Provision shall be made to accommodate expansion water by one of the following alternative
methods.

(a) allow the expansion water to travel back along cold feed pipe, provided that heated
water cannot reach any communication pipe or branch feeding a cold water outlet.
(b) where reverse flow along the cold feed is prevented by a stopvalve with a loose
jumper, replace this valve by one with a fixed jumper.
(c) where reverse flow along the cold feed is prevented, e.g. by a check valve, some
types of pressure reducing valve or a stopvalve with a loose jumper, provide an
expansion vessel in accordance with BS 6144 to accommodate expansion water.
This vessel shall be sized in accordance with the volume of water heated and the
water temperature rise so as to limit the pressure to the maximum working pressure
for the system. The expansion vessel shall accommodate expansion equal to 4% of
the total volume of water heated. Any discharge from relief valves shall be readily
visible and disposed of safely.

5.9 INSULATION

5.9.1 General

1 The storage tank shall be supplied complete with a factory applied layer of high density, CFC
free polyurethane foam insulation. The dimensions and properties of the polyurethane
insulation shall be sufficient to ensure that heat loss under normal operating conditions does
not exceed 90 watts per
square metre of surface area.

2 The polyurethane shall be protected against mechanical damage and moist atmosphere by
an outer shell.
END OF PART

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6 COMMISSIONING OF SYSTEMS ........................................................................................... 2

6.1 GENERAL ................................................................................................................................ 2

6.1.1 Scope 2
6.1.2 System Description 2
6.1.3 Submittals 2
6.1.4 Connection to Water Supply System 2
6.2 PIPELINE IDENTIFICATION.................................................................................................... 3
6.2.1 Tags and Colour Coding System 3
6.3 TESTING AND INSPECTION .................................................................................................. 3
6.3.1 General Requirements 3
6.3.2 Timing of Tests 3
6.3.3 Inspection 4
6.3.4 Leakage Test for Underground Pipelines 4
6.3.5 Testing of Installation Within Buildings 5
6.3.6 Back-Siphonage 6
6.3.7 Mechanical and Electrical Equipment 6
6.4 DISINFECTION ........................................................................................................................ 6
6.4.1 General Requirements 6
6.4.2 Installations Outside buildings 6
6.4.3 Installation Inside Buildings 7

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6 COMMISSIONING OF SYSTEMS

6.1 GENERAL

6.1.1 Scope

1 This Part specifies the requirements for identification markings for components of plumbing
installations, testing of plumbing installations and disinfection of plumbing installations.

2 Related Sections and parts are as follows: This Section

Part 1 General
Part 2 Water Distribution
Part 3 Cold Water Storage
Part 5 Hot Water Storage

Section 1 General

6.1.2 System Description

1 Where possible and practicable, the parts of all Works covered in this Section shall be split
into sections for interim testing purposes. Final testing shall be done when the installation is
complete.

2 Disinfection shall not be undertaken until all tests and inspections have been completed to
the satisfaction of the Engineer.

6.1.3 Submittals

1 The Contractor shall prepare a detailed testing and inspection programme, including method
statements, and submit it to the Engineer for approval. This programme shall identify each
item to be tested, the type of test to be performed and the date and time of the test.

2 The Contractor shall prepare test record sheets for all tests undertaken. The format of the
test record sheet shall be to the approval of the Engineer. On successful completion of a
test, the test record sheet shall be signed and stamped by all parties. The Engineer shall
retain the original test record sheet.

3 The Contractor shall prepare a detailed disinfection programme, including method

statements, and shall submit it to the Engineer for approval. This programme shall identify
the date and time at which each item is to be disinfected.

4 The Contractor shall prepare disinfection record sheets for all disinfections undertaken.
The format of the disinfection record sheet shall be to the approval of the Engineer. On
completion of disinfection, the disinfection record sheet shall be signed and stamped by all
parties. The Engineer shall retain the original disinfection record sheet.

6.1.4 Connection to Water Supply System

1 Connection to the Qatar General Electricity & Water Corporation (QGEWC) water supply
system shall not take place until all tests and inspections have been successfully completed
and the system has been disinfected.

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2 The Contractor shall comply with all the requirements of the QGEWC with respect to making
the connection to the water supply system.

6.2 PIPELINE IDENTIFICATION

6.2.1 Tags and Colour Coding System

1 Marker tape shall be laid above all underground water mains. The marker tape shall be blue
PVC or polyethylene mesh or ribbon at least 50 mm wide, incorporating a corrosion resistant
tracing system. The tape shall be clearly marked “WATER” in both English and Arabic in
black print.

2 Where aesthetically acceptable, above ground piping shall be clearly and indelibly marked
“WATER” in both English and Arabic. Pipes solely for the use of fire fighting purposes shall
be distinguishable from other water pipes.

3 Every valve in hot and cold water service pipework installed above ground shall be provided
with an identification label. The label shall be secured by either non-corroding, incombustible
means to the valve or fixed to a permanent structure near the valve. Labels secured to
valves shall be of a non-corroding and incombustible material and clearly marked, by
stamping or engraving, with a reference number for the valve. The reference numbers for the
valves shall be as stated in the Project Documents. Labels fixed near valves shall comply
with the requirements for labels secured to valves except that they need not be
incombustible.

4 Surface boxes shall have “WATER” in both English and Arabic cast on. They shall be
painted blue with a durable epoxy paint.

6.3 TESTING AND INSPECTION

6.3.1 General Requirements

1 The Contractor shall notify the Engineer at least two clear working days before hand of his
intention to test any section of the Works.

2 Unless otherwise agreed by the Engineer, both interim and final tests shall be undertaken on
each section of the Works.

3 The Contractor shall also carry out any further testing or inspections specifically requested
by QGEWC.

4 Unless otherwise provided in the Project Documentation, the Contractor shall be responsible
for providing all equipment and materials for testing purposes and for their removal and
proper disposal on completion of testing.

6.3.2 Timing of Tests

1 The timing of tests shall be arranged as follows:

(a) interim test shall be undertaken as soon as practicable after completion of a

particular section; particular attention shall be made to work which will be
concealed

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(a) final tests shall be carried out on completion of all work on items included in this
Section and prior to handing over
(b) items failing any test shall be corrected immediately and re-tested before further work
proceeds.

2 The Contractor shall note that satisfactory completion at an interim test does not constitute a
final test.

6.3.3 Inspection

1 Visual inspection shall be carried out at both interim and final testing in order to detect faults
in construction or materials not shown up under testing but which could lead to premature
failure. A careful record shall be kept of such inspections.

2 On external pipelines, the following shall be visually inspected:

(a) Pipe bed

(b) pipe line and level
(c) joints
(d) air valves
(e) washout valves
(f) gate valves
(g) thrust blocks
(h) pipe protective coating
(i) any other pipeline appurtenance.

3 Trenches shall be inspected to ensure that excavation is to the correct depth to guard
against mechanical damage due to traffic loading.

4 No part of the pipe trench shall be backfilled until the above are satisfactory completed and
approved by the Engineer.

5 All internal pipework shall be inspected to ensure that it has been securely fixed.

6 Before testing takes place, all cisterns, tanks, hot water cylinders and water heaters shall be
inspected to ensure that they are properly supported and secured, that they are clean and
that cisterns are provided with correctly fitting covers.

7 Before testing takes place, all electrical and mechanical items shall be inspected in
accordance with Section 9, Mechanical and Electrical Equipment.

6.3.4 Leakage Test for Underground Pipelines

1 After satisfactory visual inspections have been completed, hydraulic pressure testing shall be
carried out on the installation. The testing procedure shall be as follows:

(a) gauges used for testing pressure pipelines shall either be of the conventional circular
type, not less than 200 mm diameter, calibrated in metres head of water, or shall
have a digital indicator capable of reading increments of 0.1m head. Before any
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gauge is used, the Contractor shall arrange for it to be checked independently and a
dated certificate of its accuracy shall be provided
(b) before testing, valves shall be checked and sealed, the sections of pipe filled with
water and the air released. After having been filled, pipelines shall be left under
operating pressure for the period described in the Project Documentation or as
directed by the Engineer, so as to achieve conditions as stable as possible for testing
(c) the pressure in the pipeline shall then be raised steadily by pumping in water until
the specified test pressure, as given in the Project Documentation or as directed by
the Engineer, is reached in the lowest part of the section. The pressure shall be
maintained at this level, by pumping if necessary, for a period of one hour. The
pumps shall then be disconnected, and no further water shall be permitted to enter
the pipeline for a further period of one hour. After the one hour test period, the
pressure in the pipe shall be recorded. At the end of this period the original test
pressure shall be restored by pumping in water and the loss measured by drawing off
water form the pipeline until the pressure as recorded at the end of the one hour test
period is again reached
(d) the permissible loss shall not exceed 2 litres per metre nominal bore per kilometre
length per metre head (calculated as the average head applied to the section) per 24
hours. This relationship in equation format, with the leakage measured in litres, can
be written as follows:

Permissible leakage per day = 2 x D x P x L

For the one hour test period, this equation can be rewritten as follows: Permissible

leakage = (2 x D x P x L) / 24

Where: D = pipe diameter (m)

P = test pressure (m)
L = length of test section (km)

(e) in addition to the tests on separate sections, the whole pipeline shall be tested on
completion to the same pressure and by the same procedures as that outlined for
individual sections
(f) where a new pipeline is to connect to an operational pipeline the final connection
shall be inspected visually under normal operating pressure and there shall be no
visible leakage.

2 To avoid the risk of contamination, water used for testing shall be obtained from a potable
supply.

3 Before accepting a pipeline, a check shall be made that valve boxes are properly aligned,
that suitable operating keys are provided which can be easily fitted to the valves and in the
case of deep valves, that adequate extension spindles are installed.

6.3.5 Testing of Installation Within Buildings

1 When the installation is complete and visual inspection has been satisfactorily completed, it
shall be slowly filled with water, with the highest draw-off point open to allow air to be

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expelled from the system. The installation, including all cisterns, tanks cylinders and water
heaters, shall then be inspected for leaks.

2 The system shall be hydraulically tested in the following way:

(a) subject the pipes, pipe fittings and connected appliances to a test pressure at least
1.5 times the maximum working pressure for a period of at least 24 hours
(b) check the installation for leaks; including all cisterns, tanks, cylinders and water
heaters.

3 Each draw-off tap, shower fitting and float-operated valve shall be checked for flow against
specified requirements. Performance tests shall also be carried out on any specialist items to
show that they meet the requirements detailed in the Project Documentation.

6.3.6 Back-Siphonage

1 It shall be verified that the appropriate back-flow prevention devices have been selected and
that they have been installed correctly.

6.3.7 Mechanical and Electrical Equipment

1 Mechanical and electrical equipment shall be tested and commissioned in accordance with
Section 9, Mechanical and Electrical Equipment.

6.4 DISINFECTION

6.4.1 General Requirements

1 All hot water systems and cold water systems installed shall be disinfected before being
taken into use.

2 Where chlorinated water that has been used to disinfect an installation is to be discharged
into a sewer, the Drainage Department shall be informed.

3 Unless otherwise stated in the Project Documentation, the Contractor is responsible for
providing water for disinfection purposes.

6.4.2 Installations Outside buildings

1 At the time of laying, large bore pipes shall be brushed clean and sprayed internally with a
strong solution of sodium hypochlorite.

2 At the time of laying, small bore pipes shall be swabbed with a polyurethane foam plug
soaked in a strong solution of sodium hypochlorite. A water jet may be used to push the plug
along the pipe.

3 Following the disinfection process, the pipe shall be regarded as operational and the
Contractor shall not open or close any valves or take any other action which might interfere
with the use of the pipe.

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6.4.3 Installation Inside Buildings

1 All visible dirt and debris shall be removed from the cistern.

2 The cistern and distributing pipework shall be filled with clean water and then drained until
empty of all water. The cistern shall be filled again and the supply closed.

3 A measured quantity of sodium hypochlorite solution of known strength shall be added to the
water in the cistern to give a free residual chlorine concentration of 50 mg/litre in the water.

4 The cistern shall be left to stand for 1 hour. Then each draw-off fitting shall be successively
opened working progressively away from the cistern. Each tap or draw-off fitting shall be
closed when the water discharged begins to smell of chlorine. The cistern shall not be
allowed to become empty during the operation; if necessary it shall be refilled and
chlorinated as detailed above. Should refilling be necessary, the cistern and pipes shall be
left for a further hour before continuing the disinfection procedure.

5 The tap furthest from the cistern shall be opened and the level of free residual chlorine in the
water discharged from the tap shall be measured. If the concentration of free residual
chlorine is less than 30 mg/l the disinfecting process shall be repeated.

6 Finally, the cistern and pipes shall remain charged with chlorinated water for at least 16
hours and then thoroughly flushed out with clean water until the chlorine concentration at the
taps is no greater than that present in the clean water from the QGEWC supply main.

7 For installation with more than one cistern, all cisterns shall be cleaned and chlorinated, in
accordance with paragraph 1 to 4 above, simultaneously.

END OF PART

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PREFERRED VENDORS LIST-PLUMBING

SI. Description Brand Name Country of LOCAL AGENT

No. Origin
1. Potable Water booster 1 Grundfos-DM UK Abdul Rehman Abdullah
pump sets obaidan fakhroo & sons
P.O.Box: 254
Tel: 44423402
Fax:44416652
2 Holden & Brookes UK Saleh Bin Mubarak Al Khulaifi
Pullen Est.
P.O.Box-5092
Tel:44680026
Fax:44680037

3 Armstrong Canada Petrofac

P.o Box: 4404
Tel:44478800
Fax:44478811

4 Bell & Gossette USA Faisal Jassim Trading

P.O. Box 6516
Tel: 44685199
Fax: 44685145
5 Aurora USA

6 Wilo Germany

7 ITT Hyget Germany

8 ITT-Lowara Italy

9 KSB Germany

2. Water Heater 1 A O Smith USA Marine Trading

P.O.Box-399
Tel:44428334
Fax:44434181
2 IMI Santon UK Sultan Obaidan trading Co
P.O.Box: 203
Tel: 44655725
Fax:44677887
3 Bradford white. USA Marine Trading
P.O.Box-399
Tel:44428334
Fax:44434181

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4 Ariston UK Metco Qatar

P.O.Box-8697
Tel:44437980
Fax:44436129
5 Rheem USA

6 Atlantic France

7 Inventum EU

4 PPR pipes / fittings 1 Aquatherm Germany Al Sahoo Trading

P.O.Box-23446
Tel:44696226
Fax:44696987
3 Polo Ecosan Germany Techno Gulf Trading
P.O.Box-55901
Tel:44314010
Fax:44360559

4 BANNINGER Germany Oriental Trading Co

KUNSTOFF Tel:44466333
PRODUKTE Fax:44433573
5 Valves & Fittings 1 Peglers United Tadmur Cont.& Trad.
Kingdom Tel:4413628
Fax:4410812

2 Wednesbury United Tadmur Cont.& Trad.

Kingdom P.O.Box-6984
Tel:4413628
Fax:4410812

3 IMI Yorkshire United Al Andulus Trading

Kingdom P.O.Box-24155
Tel;4432822
Fax:4354322
6 Water Meter 1 Kent United Al Tayeb Trad.
Kingdom P.O.Box-1401
Tel:4419224
Fax:4622299

7 Polyethylene Tank 1 Rotomoulded Qatar Qatar Polycon

Tel:5517828
Fax:44875333
Doha,Qatar

2 Al Muftha Qatar Al muftha fiberglass

Tel:44652728
Fax:44644584
Doha,Qatar

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8 GRP Tank (Section water 1 Balmoral UK Intermodal services co.

tank) Insulation type with P.O Box 31242
local authority approval Doha, Qatar
Tel. 44621168
Fax 44621169

2 Samsung S.Korea Bijans International Trading

company
P.O Box 70272
Doha, Qatar
Tel. 44672295
Fax 44672235

3 Sungil S.Korea Crown International Trading

P.O. Box: 32340
Tel: 44448222
Fax: 44428882
Doha, Qatar

4 Nikko Malasiya Crown International Trading

P.O. Box: 32340
Tel: 44448222
Fax: 44428882
Doha, Qatar

9 Pipe & Fitting- Copper 1 Wednesbury UK

Pipes

2 Nibco USA

3 Mueller USA

4 IM Yorkshire UK

5 Pegler UK

9 Meters & Gauges 1 Weiss Germany

2 Dwyer USA

3 Trerice USA

4 ITT B & G USA

5 Hunter Canada

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9 Water Hammer Arrestor 1 MIFAB USA

2 Brady USA

3 Josam USA

9 Values & Accessories 1 KSB Amiri France

2 St. Gobain UK

3 Stanton & Starley UK

Hawle Austria

NOTE:

1. All equipment shall be from the original manufacturer, assembled units under license are not
acceptable.

2. Control panels associated with pump sets shall be from the same manufacturer.

3. Any alternative proposal shall be submitted with product comparison and sample for approval.

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Section 20 DRAINAGE WORKS FOR
BUILDINGS
Part 1 General
Part 2 Internal Drainage Works
Part 3 External Drainage Works
Part 4 Drainage Pipes in Trenches
Part 5 Structures related to Drainage Works
Part 7 Commissioning of Systems

Addendum

Preferred Vendors List

MECHANICAL SPECIFICATION PACKAGE 5
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1 GENERAL ................................................................................................................................ 2

1.1 INTRODUCTION ...................................................................................................................... 2

1.1.1 Scope 2
1.1.2 References 2
1.2 REGULATIONS AND STANDARDS ........................................................................................ 2
1.2.1 Public Works Authority 2
1.3 CONTRACTOR’S RESPONSIBILITY ...................................................................................... 2
1.3.1 General 2
1.3.2 Existing Services 2
1.3.3 Maintenance Period Requirements 2
1.4 CRAFTSMEN ........................................................................................................................... 2
1.4.1 Workmanship 2
1.4.2 Qualifications 3
1.5 MATERIALS ............................................................................................................................. 3
1.5.1 General 3
1.6 DRAWINGS.............................................................................................................................. 3
1.6.1 Shop Drawings 3
1.6.2 Co-ordination Drawings 3
1.6.3 As-Built Record Drawings and Survey Drawings 3
1.7 SITE WORKS........................................................................................................................... 3
1.7.1 Co-operation with other Trades 3

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1 GENERAL

1.1 INTRODUCTION

1.1.1 Scope

1 This Section specifies the requirements for the construction and installation of drainage
works for buildings. It does not include highway drainage.

2 Related Sections are as follows:

Section 1 General
1.1.2 References

1 The following standards are referred to in this Part:

BS 8000......................Workmanship on building sites

1.2 REGULATIONS AND STANDARDS

1.2.1 Public Works Authority

1 The Contractor shall carry out his work in accordance with the relevant requirements of the
Public Works Authority.

1.3 CONTRACTOR’S RESPONSIBILITY

1.3.1 General

1 The Contractor is responsible for obtaining all necessary approvals and permits required to
complete the parts of the Works included in this Section.

1.3.2 Existing Services

1 The Contractor is responsible for locating and identifying all existing services that may affect,
or be affected by, the construction of the parts of the Works included in this Section.

1.3.3 Maintenance Period Requirements

1 The Contractor is responsible for all the maintenance period requirements for all parts and
components of the Works included in this Section.

1.4 CRAFTSMEN

1.4.1 Workmanship

1 Workmanship shall comply with the relevant provisions of BS 8000.

2 Construction of each part of the Works covered in this Section shall be undertaken by
experienced craftsmen capable of performing the tasks allocated to them in a professional
and competent manner.

3 If required by the Engineer, the Contractor shall instruct craftsmen to demonstrate their
ability to perform tasks allocated to him.

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1.4.2 Qualifications

1 Where the Project Documentation specifies that specialist craftsmen are required to
undertake a specific work task, the Contractor shall furnish the Engineer with copies of
qualifications pertinent to performing such work tasks for those craftsmen who will be
undertaking the work.

1.5 MATERIALS

1.5.1 General

1 All materials, components and products shall comply with the relevant provisions of Section
1, General.

2 All materials, components and products shall be supplied by experienced manufacturers as

designated in the Project Documentation or to the written approval of the Engineer.

1.6 DRAWINGS

1.6.1 Shop Drawings

1 The Contractor shall prepare shop drawings for all parts of the Works to be installed or
constructed under this Section and submit them to the Engineer in accordance with the
relevant provisions of Section 1, General. The shop drawings shall include diagrams,
illustrations, schedules, general arrangements of equipment and appurtenances in relation
to buildings and structures, method statements and details of specialised installation and
construction work.

1.6.2 Co-ordination Drawings

1 These shall be prepared by the Contractor to show how interdisciplinary work will be co-
ordinated. The location, size and details of fixings, box-outs, ducts, holes, pipe chases and
plinths shall be shown on the detailed layout drawings which shall be fully co-ordinated with
all other work disciplines.

1.6.3 As-Built Record Drawings and Survey Drawings

1 The Contractor shall prepare Record Drawings of all works constructed or installed under
this Section in accordance with the relevant provisions of Section 1, General. These shall be
prepared as work proceeds. They shall provide a record of any modification to materials and
equipment, and to the layout, arrangement and installation of the Works.

1.7 SITE WORKS

1.7.1 Co-operation with other Trades

1 The Contractor shall so organise work progress to harmonise with the work of all trades so
that work may proceed as expeditiously as possible. The Contractor shall be responsible for
the correct placing of the Works and the connection thereof to the work of all related trades.

END OF PART

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2 INTERNAL DRAINAGE WORKS ............................................................................................. 2

2.1 GENERAL ................................................................................................................................ 2

2.1.1 Scope 2
2.1.2 Reference 2
2.1.3 Contractor’s Responsibility 3
2.1.4 System Description 3
2.1.5 Site Work 3
2.1.6 Fixing 3
2.1.7 Sealants 3
2.1.8 Inspection 3
2.2 INTERNAL DRAINAGE PIPEWORK ....................................................................................... 4
2.2.1 General 4
2.2.2 Materials 4
2.3 LABORATORY DRAINAGE SYSTEMS ................................................................................... 4
2.3.1 General 4
2.4 GULLIES .................................................................................................................................. 5
2.4.1 Floor Gullies 5
2.5 ACCESS TO DRAINS .............................................................................................................. 5
2.5.1 General 5
2.6 ROOF TERMINATION ............................................................................................................. 5
2.6.1 Ventilating Pipes and Stack Vents 5
2.7 PUMPING FACILITIES ............................................................................................................ 5
2.7.1 Sump Pumps 5
2.8 SANITARYWARE INSTALLATIONS........................................................................................ 6
2.8.1 General 6
2.8.2 Pedestal WC Pans 6
2.8.3 Squat Type Toilet 6
2.8.4 Flushing Cisterns for Toilets 6
2.8.5 Slab Urinals 7
2.8.6 Bowl Urinals 7
2.8.7 Wash-basins 7
2.8.8 Sinks 7
2.8.9 Showers 8
2.8.10 Taps 8
2.8.11 Traps 8

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2. INTERNAL DRAINAGE WORKS

2.1 GENERAL

2.1.1 Scope

1 This Part specifies the requirements for internal drainage pipework, internal drainage
systems and sanitary appliances.

2 Related Sections and Parts are as follows: This Section

Part 1 General
Part 7 Commissioning of Systems

Section 1 General
Section 8 Sewerage
Section 9 Mechanical and Electrical
2.1.2 Reference

1 The following standards are referred to in this Part:

BS 416........................Discharge and ventilating pipes and fittings, sand-cast or spun in cast
iron
BS 437........................Specification for cast iron spigot and socket drain pipes and fittings
BS 539........................Dimensions of fittings for use with clay drains and sewer pipes
BS 1010......................Specification for draw-off taps and stopvalves for water services
(screw-down patterns)
BS 1125......................WC flushing cisterns
BS 1184......................Specification copper and copper alloy traps
BS 1188......................Ceramic wash basins and pedestals
BS 1206......................Fireclay sinks. Dimensions and workmanship
BS 1212......................Float operated valves
BS 1244......................Metal sinks for domestic purposes
BS 1254......................Specification for WC seats (plastics)
BS 1255......................WC seats (plastics)
BS 2456......................Specification for floats (plastics) for ballvalves for hot and cold water

BS 3402......................Quality of vitreous china sanitary appliances

BS 4514......................Unplasticized PVC soil and ventilation pipes, fittings and accessories
BS 5254......................Polypropylene waste pipe and fittings (external diameter 34.6 mm,
41.0 mm and 54.1 mm)
BS 5255......................Thermoplastics waste pipe and fittings
BS 5503......................Specification for vitreous china washdown WC pans with horizontal
outlet
BS 5572......................Sanitary Pipework
BS 5889......................One-part gun grade silicone-based sealants
BS 8313......................Code of Practice for accommodation of building services in ducts

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2.1.3 Contractor’s Responsibility

1 The Contractor is responsible for checking the dimensions of all internal drainage works to
be installed against the availability of space at their intended installation location.

2.1.4 System Description

1 Internal drainage systems shall generally conform to the relevant provisions of BS 5572.

2 Internal drainage systems shall comprise the minimum pipe work necessary to carry away
the discharges from sanitary appliances in buildings quickly and quietly.

3 Drainage pipe work installations shall be such that there is no leakage of contaminated water
or foul air into the building.

4 Drainage systems, including materials, joints, supports and fixings shall be durable under the
expected operating conditions.

5 Pipe work and fittings in drainage systems shall be installed so that defective parts can be
replaced without undue difficulty.

2.1.5 Site Work

1 A check should be made to ensure that all holes, chases and ducts required for pipe work
have been properly provided in accordance with the relevant provisions of BS 8313.

2 Where several pipes pass through floors in close proximity, the Contractor may provide a
single framed opening in lieu of individual sleeves. Framed openings shall be to the approval of
the Engineer and shall be provided with 100 mm high curbs, on all sides.

2.1.6 Fixing

1 Water supply and discharge pipes should be installed before sanitary appliances are fixed.
Before fixing an appliance into position, the Contractor shall ensure that the discharge pipe is
clear of obstruction. Joints between appliances and traps and/or pipes should be of the
union or detachable type.

2 Sinks and baths should be installed so that they drain to the outlet by gravity.

3 Cistern overflow pipes should be arranged to give a visible warning of discharge.

2.1.7 Sealants

1 Sealants shall comply with the relevant provisions of BS 5889, type B (high modulus sealant)
with a fungicide incorporated. The sealant should be applied using a purpose made gun or
devise.
2.1.8 Inspection

Upon completion of the work, all appliances, materials and workmanship should be carefully
examined for defects and for faults in installation. Any defects or faults shall be corrected
before the appliances are handed over for use.

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2.2 INTERNAL DRAINAGE PIPEWORK

2.2.1 General

1 Pipes and fittings used shall be suitable for their purpose.

2 If pipes, pipe joints and pipe fittings are of dissimilar metals, measures shall be taken to
prevent electrolytic corrosion.

3 The Contractor shall comply with all the recommendations of manufacturers when jointing
pipes of different materials.

2.2.2 Materials

1 Soil, waste and ventilating pipes, fittings and accessories for above ground drainage systems
shall comply with the relevant provisions of the appropriate standard, as set out in Table 2.1.
Table 2.1
Standards for pipes, fittings and accessories for above ground drainage systems

Material Standard

Cast Iron BS 416, Parts 1 and 2

PVC-U (soil and ventilating) BS 4514

Polypropylene (waste) BS 5254

Plastic (waste) BS 5255

2 Internal drainage pipes and fittings for below ground applications shall comply with the
relevant provisions of Section 8, Sewerage.

2.3 LABORATORY DRAINAGE SYSTEMS

2.3.1 General

1 The chemical resistance properties of pipes, fittings, jointing systems and any other drainage
accessory shall be suitable for conveying all solutions expected to be discharged to the
drainage system. Where possible, technical advisory services provided by manufacturers
shall be used to ascertain the suitability of products to be used in the drainage system. A full
list of the solutions expected to be discharged to the drainage system is given in the Project
Documentation.

2 Drainage systems for the collection of solutions which are not permitted to be discharged to
existing drainage facilities shall be kept totally separate form other drainage systems.

3 Drainage systems to which grit, gravel, sand or other granular material shall be discharged
shall have sufficient abrasion resistance properties and be fitted with suitable traps and
catch basins.

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2.4 GULLIES

2.4.1 Floor Gullies

1 Floor gullies shall comply with the requirements of the following paragraphs unless
otherwise detailed in the Project Documentation.

2 Floor gullies shall be coated cast iron and comply with the relevant provisions of BS 539.
They shall have a 90 mm diameter trapped outlet and be fitted with a galvanised flat grating of
an approved type.

3 Floor drains shall be selected with sufficient grate free area to pass the anticipated flow. The
grate free area is defined as the total area of the drainage openings in the grate and shall be
not less than 1.5 times greater than the pipe to which the grate is draining.

4 With the exception of those located in toilets, all floor drains fitted with traps shall incorporate a
removable bucket.

5 The gully should be installed on a firm base and located relative to the floor finish. The
method of fixing shall be as detailed in the Project Documentation.

2.5 ACCESS TO DRAINS

2.5.1 General

1 Sufficient and suitable access should be provided to enable all pipework to be tested and
maintained effectively. Access covers, plugs or caps should be sited so as to facilitate the
insertion of testing apparatus and the use of equipment for cleaning and/or for the removal of
blockages. The use of apparatus or equipment should not be impeded by the structure or
other services.

2 Access points should not be located where their use may give rise to nuisance or danger if
spillage occurs.

2.6 ROOF TERMINATION

2.6.1 Ventilating Pipes and Stack Vents

1 Ventilating pipes and stack vents shall terminate with a domical cage or other cover that
does not restrict air flow. They shall be positioned so that foul air does not cause a nuisance or
health hazard.

2.7 PUMPING FACILITIES

2.7.1 Sump Pumps

1 Sump pumps shall comply with the relevant provisions of Section 9, Mechanical and Electrical
Equipment.

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2.8 SANITARYWARE INSTALLATIONS

2.8.1 General

1 Sanitary fittings shall, unless otherwise stated in the Project Documentation, be as described
in the following Clauses.

2 Where screws are used to fix sanitary appliances to concrete, blockwork or brickwork they
shall be rust-proofed steel and plugged.

2.8.2 Pedestal WC Pans

1 Pedestal WC pans shall be of white glazed fireclay and shall comply with the relevant
provisions of BS 5503. They shall have P, Q or S traps as required. WC seats shall be black
plastic and shall comply with the relevant provisions of BS 1254. The traps shall be provided
with antisyphonage outlets, where required

2 Where pans are fixed to timber floors they shall be jointed to the drain pipe with hemp gaskin
and red lead putty. Where pans are fixed to concrete floors, they shall be jointed to the drain
pipe with cement/sand mortar mixed in a 1:2 ratio. The pans shall be screwed to the floor.

2.8.3 Squat Type Toilet

1 Squat type toilets shall comprise a closet of white vitreous china complying with the relevant
provisions of BS 3402 for sinking into the floors and integral or separate tread plates in a
matching material. They shall have P, Q or S trap as required. The traps shall be provided
with antisyphonage outlets, where required.

2 The closets and tread plates shall be set into a concrete bed with the top surface level with
the floor finish.

2.8.4 Flushing Cisterns for Toilets

1 Flushing cisterns shall be black plastic or white vitreous china complying with the relevant
provisions of BS 1125 and shall be the single flushing type. They shall be fitted with a nylon
or brass ball valve complying with the relevant provisions of BS 1212 with a plastic float
complying with the relevant provisions of BS 2456. They shall have connections for 12 mm
diameter supply and 20 mm diameter overflow pipes. Flush pipes complying with the relevant
provisions of BS 1125 shall be provided and shall be of galvanised mild steel.

2 Flush pipes shall be jointed to the bottom of the cisterns by means of watertight unions
which allow for easy removal and shall be jointed to WC pans by means of approved rubber
cone connectors. The cisterns shall be fixed to walls with screws.

3 High level cisterns shall be provided with chromium plated chains with rubber pull handles.
They shall be fixed a height of 1500 mm from finished floor level to the underside of the
cistern. Flush pipes shall be 30 mm diameter and shall be fixed with pipe clips which shall be
screwed to walls.

4 Low level cisterns shall be provided with chromium plated lever flushing handles. They shall
be fixed at a height of 600 mm from finished floor level to the underside of the cistern. Flush
pipes shall be 35 mm diameter.

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2.8.5 Slab Urinals

1 Urinal slabs shall be white glazed fireclay and shall have end screens. All urinals shall have
a white glazed fireclay floor channel and white glazed fireclay fluted treads set flush with the
floor finish. The channel shall have a 40 mm diameter chromium plated brass outlet with
hinged grating.

2 The urinal slabs, channel and floor treads shall be bedded in cement mortar and jointed and
painted with white cement. The flushing cistern shall be a white glazed fireclay automatic
flushing cistern, complete with cover, and shall be fixed on white porcelain enamelled cast
iron brackets which shall be screwed to the wall.

3 Flush pipes and spreaders shall be chromium plated and shall be fixed to walls with
chromium plated holderbats. A 40 mm diameter trap with 40 mm or 75 mm deep seal as
necessary shall be provided.

2.8.6 Bowl Urinals

1 Urinals bowls shall be white glazed fireclay with lipped basin and flushing rim. Urinal bowls
shall be screwed to the wall. Flushing cisterns, flushing pipes and spreaders shall be as
described for slab urinals. The bowl urinals shall be complete with chromium plated brass
outlet and trap.

2.8.7 Wash-basins

1 Wash-basins shall be white glazed fireclay size 625 mm x 450 mm overall and shall comply
with the relevant provisions of BS 1188. Each basin shall be provided with a 30 mm
diameter chromium plated waste outlet and rubber plug with a chromium plated chain and
stay.

2 A 30 mm diameter trap shall be fixed to each basin having a 40 mm deep seal and one or
two 12 mm pillar taps shall be fixed as required. Where only one tap only is required, the
basin shall be provided with a tap hole stopper to match the basin. Unless otherwise
specified, each wash-basin shall be fixed on two cast iron brackets complying with the
relevant provisions of BS 1255 which shall be screwed to the wall. If required the pedestal
WC pan shall match the basin.

2.8.8 Sinks

1 Ceramic sinks shall be white glazed fireclay size 600 mm x 450 mm x 250 mm deep and
shall comply with the relevant provisions of BS 1206.

2 Metal sinks shall be stainless steel or aluminium to the sizes stated in the Project
Documentation and shall comply with the relevant provisions of BS 1244.

3 Each sink shall be provided with a 40 mm chromium plated brass waste outlet, outlet grating,
overflow and rubber plug with chromium plated chain and stay. A 40 mm diameter trap shall
be fixed to each sink having a 40 mm or 75 mm deep seal as necessary. Each sink shall
have one or two 12 mm diameter pillar or bib taps, as required. Where only one tap is
required, a tap hole stopper to match the sink shall be provided. Pillar taps shall have 150
mm raising pieces and bib taps shall have extension pieces of adequate length.

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4 Sinks shall be supported and fixed on brackets or legs unless otherwise specified in the
Project Documentation. Two cast iron brackets shall be used for sinks supported and fixed
on brackets. The brackets shall comply with the relevant provisions of BS 1255 and shall be
screwed to the wall. Legs for supporting sinks shall be of cast iron or galvanised steel with a
painted finish. Sinks shall be fixed at a height of 550 mm from the outlet grating to finished
floor level.

2.8.9 Showers

1 Shower fittings shall comprise a 100 mm diameter adjustable chromium plated brass inclined
shower head with rose and 12 mm diameter supply pipe(s) with 12 mm diameter stop
valve(s) to control the water supply.

2 The shower head shall be fixed a height of 1800 mm above the finished floor level. All
exposed pipework and fittings serving the showers within the shower area shall be
chromium plated and fixed with chromium plated holderbats.

2.8.10 Taps

1 All taps shall comply with the relevant provisions of BS 1010. Taps shall be of the following
type as appropriate and, where necessary, shall be provided with extension pieces.
(a) pillar taps shall be 12 mm diameter chromium plated brass with cross heads.
(b) bib taps, unless otherwise stated, shall be 12 mm diameter chromium plated brass
with cross heads, complete with backplate elbow or wall flange. Bib taps to stand
pipes shall be 12 mm diameter unplated brass, and shall have an extended nozzle
suitable for hose connections.
2.8.11 Traps

1 Traps shall be of the following types:-

(a) traps for sinks, lavatory basins and baths shall be copper, brass, or aluminium
complying with the relevant provisions of BS 1184, complete with cleaning eye. Traps
to sinks, baths shall have an overflow connection.
(b) traps for urinals with suspended drains shall be 75 mm diameter cast iron complying
with the relevant provisions of BS 416, Table 14. They shall be fitted with cast iron
connectors and threaded to receive the outlet from the urinal.
(c) traps for urinals with buried drainage shall be 75 mm diameter cast iron complying
with the relevant provisions of BS 437. They shall be fitted with cast iron connectors
and threaded to receive the outlet from the urinal.

END OF PART

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3 EXTERNAL DRAINAGE WORKS ............................................................................................ 2

3.1 GENERAL ................................................................................................................................ 2

3.1.1 Scope 2
3.1.2 References 2
3.1.3 System Description 2
3.2 PIPEWORK .............................................................................................................................. 3
3.2.1 General 3
3.2.2 Vitrified Clay Pipework 3
3.2.3 Unplasticized Polyvinyl Chloride (PVC-U) Pipework 3
3.2.4 Testing of Pipework 3
3.3 ACCESSORIES ....................................................................................................................... 3
3.3.1 Gullies and Gully Gratings 3
3.4 CONNECTION TO EXISTING PIPELINES .............................................................................. 4
3.4.1 Connections to Existing Government Mains 4

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3 EXTERNAL DRAINAGE WORKS

3.1 GENERAL

3.1.1 Scope

1 This Part specifies the requirements for pipework and accessories for external drainage
works in building areas. External drainage works includes foul water sewerage and surface
water sewerage.

2 Related Sections and Parts are as follows:

This Section
Part 1 General
Part 6 Commissioning of Systems

Section 1 General
Section 5 Concrete
Section 6 Roadworks
Section 8 Sewerage
3.1.2 References

1 The following standards are referred to in this Part:

BS 2494......................Elastomeric seals for joints in pipework and pipeline
BS 4346 .....................Joints and fittings for use with unplasticized PVC pressure pipes.
BS 4660......................unplasticized polyvinyl chloride (PVC-U) pipes and plastic fittings of
nominal sizes 110 and 160 for below ground drainage and sewage
BS 5481......................Unplasticized PVC pipe and fittings for gravity sewers
BS 6209 .....................Solvent cement for non-pressure thermoplastic pipe systems
BS EN 295 .................Vitrified clay pipes and fittings and pipe joints for drains and sewers
ISO 4633 ....................Rubber Seals -Joints rings for supply, drainage

3.1.3 System Description

1 Pipes and fittings to be used for foul sewerage shall be suitable for carrying sewage at
temperatures of up to 45°C with hydrogen sulphide concentrations up to 400 mg/l.

2 Pipes shall be suitable for immersion in corrosive groundwater conditions typically exhibiting
the following characteristics unless otherwise specified:
SO3 Content : 1.7 g/l
CI Content : 1.07 g/l
pH : 8.6
Conductivity : 4000 µs/cm
3 The Contractor shall be responsible for providing a jointing system as recommended by the
pipe manufacturer that enables the installation and use of the designated pipeline systems.

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3.2 PIPEWORK

3.2.1 General

1 Pipes shall have adequate strength to meet the loading requirements, be sufficiently robust
to withstand site handling and be sufficiently durable to remain watertight for the anticipated
life of the system.

2 Pipes and joints should remain sufficiently water tight to prevent the ingress of ground water
and the ingress of effluent when subject to ground movement and settlement.

3.2.2 Vitrified Clay Pipework

1 Vitrified clay pipes and fittings for drains and sewers shall comply with the relevant
provisions of BS EN 295.

2 Pipes shall have spigot and socket joints complying with the relevant provisions of BS EN
295. Joints shall have elastomeric joint seals. Complying with the relevant provision of ISO
4633 or, BS 2494 (Type D) and shall be obtained from the pipe manufacturer. For pipes up
to 150 mm diameter, push-fit (sleeve type) polypropylene flexible couplings may be used in
place of spigot and socket joints.

3 All other requirements related to the manufacture, inspection and testing of vitrified clay
pipes shall be in accordance with the relevant provision of Section 8, Sewerage.

3.2.3 Unplasticized Polyvinyl Chloride (PVC-U) Pipework

1 PVC-U pipe joints and fittings for gravity drains and sewers shall comply with the relevant
provisions of BS 4660 or 5481.

2 Joints shall have elastomeric joint seals complying with the relevant provisions of ISO 4633
or BS 2949 (Type D) and shall be obtained from the pipe manufacturer.

3 Solvent cements for jointing PVC-U pipes shall comply with BS 4346. For pipes and fittings
complying with BS 4660, solvent cement may alternatively comply with BS 6209.

4 All other requirements related to the manufacture, inspection and testing of PVC-U pipes
shall be in accordance with the relevant provisions of Section 8, Sewerage.

3.2.4 Testing of Pipework

1 Internal and external pressure tests shall be carried out on external drainage pipes. Test
procedures are detailed in Part 6 of this Section.

3.3 ACCESSORIES

3.3.1 Gullies and Gully Gratings

1 Gullies and gully gratings shall comply with the relevant provisions of Section 6, Roadworks.

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3.4 CONNECTION TO EXISTING PIPELINES

3.4.1 Connections to Existing Government Mains

1 Connections to existing Government mains shall comply with the relevant provisions of
Section 8, Sewerage, and the following clauses.

2 Where possible and practicable, connections shall be made to future connection ports in
existing Government manholes. The caps on future connection ports to which connections
are made shall be cleaned and delivered to the government stores in accordance with he
relevant provisions of Section 1, General.

3 Where it is not possible of practicable to utilise future connection ports in existing manholes,
connections shall be made by either breaking into existing manholes or constructing new
manholes on existing mains.

4 If it is necessary to break into an existing manhole, the Contractor shall break into the
manhole wall, insert pipework, break out the existing benching, construct benching to suit
new connection and make good. If necessary, the Contractor shall relocate the access
ladder and the cover slab to suit the new benching layout.

5 Manholes built on an existing Government mains shall be constructed in accordance with

Clause 6 of this Part. On completion, such manholes shall become the property of the
government.

6 The Contractor shall be responsible for all over-pumping operations associated with making
connections to Government mains.

END OF PART

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4 DRAINAGE PIPES IN TRENCHES.......................................................................................... 2

4.1 GENERAL ................................................................................................................................ 2

4.1.1 Scope 2
4.1.2 References 2
4.2 LAYING OF DRAINAGE PIPES IN TRENCHES ..................................................................... 2
4.2.1 System Description 2
4.2.2 General 2
4.2.3 Bedding 3
4.2.4 Protective Coatings 3
4.2.5 Concrete Protection to Pipes 4
4.2.6 Completion of Pipe Surround 4
4.2.7 Backfilling 4
4.2.8 Protective Coatings 5
4.2.9 Pipes under Buildings 5
4.3 ACCESS TO DRAINAGE PIPES IN TRENCHES .................................................................... 5
4.3.1 General 5
4.3.2 Rodding Eyes 5
4.3.3 Provision of Access to Drains 5
4.4 TESTING .................................................................................................................................. 6
4.4.1 Testing of Pipework 6

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4 DRAINAGE PIPES IN TRENCHES

4.1 GENERAL

4.1.1 Scope

1 This Part specifies the requirements for trenches and bedding for drainage pipes
constructed internally and externally.

2 Related Sections and Parts are as follows:

This Section
Part 1 General
Part 2 Internal Drainage Works
Part 3 External Drainage Works
Part 6 Commissioning of Systems

Section 1 General
Section 5 Concrete
Section 8 Sewerage

4.1.2 References

1 The following standards are referred to in this Part:

BS 743........................Materials for damp-proof courses.
BS 882 Aggregates from natural sources for concrete
BS 1142......................Fibre building boards

BS 2494 Specification for elastomeric joint rings for pipework and pipeline
BS 6076......................Tubular polythene film for use as a protective sleeving for buried iron
pipes and fittings

4.2 LAYING OF DRAINAGE PIPES IN TRENCHES

4.2.1 System Description

1 The laying of drainage pipes in trenches shall generally be in accordance with the relevant
provisions of Section 8, Sewerage.

4.2.2 General

1 Where socketed pipes are required to be laid on a granular or sand bed, or directly on a
trench bottom, joint holes shall be formed in the bedding material or final excavated surface
to ensure that each pipe is uniformly supported throughout the length of its barrel and to
enable the joint to made.

2 Pipes shall be laid on setting blocks only where a concrete bed or cradle is used.

3 Where pipes are required to be bedded directly on the trench bottom, the final excavated
surface shall be trimmed and levelled to provide even bedding for the pipeline and shall be

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free from all extraneous matter that may damage the pipe, pipe coating, or sleeving. Where
rock is encountered, the trench shall be cut at least 150 mm deeper than other ground and
made up with well compacted selected fill material.

4 No protective cap, disc or other appliance on the end of a pipe or fitting shall be removed
permanently until the pipe or fitting which it protects is about to be jointed. Pipes and fittings,
including any lining or sheathing, shall be examined for damage and the joint surfaces and
components shall be cleaned immediately before laying.

5 Suitable measures shall be taken to prevent soil or other material from entering pipes, and to
anchor each pipe to prevent flotation or other movement before the Works are complete.

6 Where pipeline marker tape is specified, it shall be laid between 100 mm and 300 mm above
the pipe.

4.2.3 Bedding

1 Bedding for pipes shall be constructed by spreading and compacting granular bedding
material over the whole width of the pipe trench. After the pipes have been laid, additional
material shall, if required, be placed and compacted equally on each side of the pipe, and
where practicable, this shall be done in sequence with the removal of the trench supports.

2 Bedding material shall be in accordance with Table 4.1 unless otherwise specified in the
Project Documentation.

3 Nominal single sized aggregate and graded aggregate shall comply with Table No. 4 of BS
882.

4 Sand for bedding material shall comply with the relevant provisions of BS 882.

5 Bedding systems other than those specified in this Clause may be allowed upon approval of
the Engineer or as recommended by the pipe manufacturer.

Table 4.1
Bedding Material

Pipe Diameter Bedding

up to 65 mm Sand

65 - 100 mm 10 mm single sized aggregate

10 or 14 mm single sized or 14-15 mm

100 - 200 mm
graded aggregate
10,14 or 20 mm single sized or 15-5 or 20-5
Over 200 mm
mm graded aggregate.

4.2.4 Protective Coatings

1 Coatings, sheathings or wrappings shall be examined for damage, repaired where

necessary, and made continuos before trench excavations are backfilled.

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4.2.5 Concrete Protection to Pipes

1 Pipes to be bedded on or cradled with concrete shall be supported on precast concrete

setting blocks. The top face of each block shall be covered with two layers of compressible
packing complying with BS 743.

2 Concrete provided as a protection to pipes shall be Grade C20, placed to the required depth
in one operation.

3 Where pipes with flexible joints are used, the concrete protection shall be interrupted over its
full cross-section at each pipe joint by a shaped compressible filler of bitumen impregnated
insulating board to BS 1142 or equally compressible material. The thickness of the
compressible filler shall be in accordance with Table 4.2.
Table 4.2
Thickness of Compressible Filler

Nominal Bore of Pipe (mm) Thickness of Compressible Filler (mm)

Up to 300 13
Over 300 and up to 600 25
Over 600 and up to 1200 38

4 Rapid hardening cement shall not be used in concrete for the protection of plastics pipe.

5 Plastics pipes shall be wrapped with a layer of plastic sheeting complying with a composition
in accordance with Clause 3 of BS 6076 and a nominal thickness of 125 microns before
being surrounded by concrete.

6 Concrete work shall comply with the relevant provisions of Section 5, Concrete.

4.2.6 Completion of Pipe Surround

1 Fill material shall, where required, be placed and compacted over the full width of the trench
in layers not exceeding 150 mm before compaction, to a finished thickness of 250 mm above
the crown of the pipes.

4.2.7 Backfilling

1 Backfilling shall, wherever practicable, be undertaken immediately the specified operations

preceding it have been completed. Backfilling shall not, however, be commenced until the
parts of the Works to be covered have achieved a strength sufficient to withstand all loading
imposed thereon.

2 Backfilling around existing structures shall be undertaken in such manner as to avoid

uneven loading or damage.

3 Filling material to excavations shall be deposited in layers not exceeding 250 mm

unconsolidated thickness and compacted to 95% modified proctor.

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4 Where the excavations have been supported and the supports are to be removed, these,
where practicable, shall be withdrawn progressively as backfilling proceeds in such a
manner as to minimise the danger of collapse. All voids formed behind the supports shall be
carefully filled and compacted

4.2.8 Protective Coatings

1 Coatings, sheathings or wrappings shall be examined for damage, repaired where

necessary, and made continuos before trench excavations are backfilled.

4.2.9 Pipes under Buildings

1 Where a pipe has less than 300 mm of cover under a load bearing slab, it should be
surrounded with concrete as an integral part of the slab. Where possible, the concrete
surround shall be poured at the same time as the slab. The surround shall be tied to the slab
with nominal steel reinforcement placed vertically with turned over ends.

2 No provision for pipe flexibility along the concrete surround shall be made, unless an
expansion joint is included in the slab. A construction joint should be included in the
surround at that point which must also coincide with a pipe joint.

3 In normal, stable ground conditions, and with 300 mm or more of cover to the pipeline
beneath the slab, a total granular surround can be used as a pipe bedding. Refer to Clause
4.2.3 of this Part for the bedding specification.

4 Flexibility shall be incorporated into the pipeline as it leaves any concrete surround.

5 Where plastic pipes are to be surrounded in concrete, Clause 4.2.5 of this Part shall apply.

4.3 ACCESS TO DRAINAGE PIPES IN TRENCHES

4.3.1 General

1 Access is required to drainage installations for testing, inspection, maintenance and removal
of debris.

4.3.2 Rodding Eyes

1 Rodding eyes shall be constructed in pipework of the same diameter as the drains it serves
and should connect to the drain at an angle not steeper than 45° from the horizontal.

4.3.3 Provision of Access to Drains

1 Every drain length should be accessible for maintenance and rodding without the need to
enter buildings. Access should be provided at the head of each run of a drain and at
changes in direction, gradient or pipe diameter.

2 Table 4.3 indicates the recommended maximum distance between rodding eyes, inspection
chambers and manholes.

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3 Where a branch drain joins another drain without the provision of an inspection chamber or
manhole at the junction, access should be provided on the branch drains within 12 m of the
junction.
Table 4.3
Maximum Spacings of Access Points

Distance to from Junction or from Inspection from Manhole

Branch Chamber

start of external drain - 22 m 45 m

rodding eye 22 m 45 m 45 m
inspection chamber 22 m 45 m 45 m
manhole 45 m 45 m 90 m

4.4 TESTING

4.4.1 Testing of Pipe work

1 Pressure tests shall be carried out on below ground plumbing pipes. Test procedures are
detailed in Part 6 of this Section.

END OF PART

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5 STRUCTURES RELATED TO DRAINAGE WORK ................................................................. 2

5.1 GENERAL ................................................................................................................................ 2

5.1.1 Scope 2
5.1.2 References 2
5.1.3 Concrete Work 2
5.1.4 Pipes built into structures 2
5.2 CONSTRUCTION OF MANHOLES, CHAMBERS AND SOAKAWAYS .................................. 2
5.2.1 General 2
5.2.2 Soakaways 2
5.3 PRECAST CONCRETE MANHOLES ...................................................................................... 3
5.3.1 General 3
5.3.2 Jointing of Precast Manholes 3
5.4 TESTING OF STRUCTURES RELATED TO DRAINAGE WORK .......................................... 3
5.4.1 General 3

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5 STRUCTURES RELATED TO DRAINAGE WORK

5.1 GENERAL

5.1.1 Scope

1 This Part specifies the requirements for the construction of manholes, chambers and
soakaways for drainage works.

2 Related Section and Parts are as follows: This Section

Part 1 General
Part 3 External Drainage Works
Part 6 Commissioning of Systems

Section 5 Concrete
Section 6 Roadworks
Section 8 Sewerage

5.1.2 References

1 The following standards are referred to in this Part: PWA Developer’s Drainage Guide
5.1.3 Concrete Work

1 Concrete for manholes, chambers and soakaways shall comply with the relevant provisions
of Section 5, Concrete.

5.1.4 Pipes built into structures

1 Where pipes are built into concrete, they shall be rigidly secured in position to prevent
movement and shall be free from external coatings which might adversely affect the bond.

5.2 CONSTRUCTION OF MANHOLES, CHAMBERS AND SOAKAWAYS

5.2.1 General

1 The construction of manholes and chambers for drainage works for foul sewage and surface
water sewage shall comply with the relevant provisions of the following:

(a) Section 8 of this Specification, Sewerage

(b) PWA - Developer’s Drainage Guide

5.2.2 Soakaways

1 Soakaways for surface water sewage shall comply with the relevant provisions of Section 6,
Roadworks, except as amended in this Part.

2 Soakaways shall not be constructed closer than 5 m from a building or in a position where
the ground below foundations is likely to be affected.

3 Precast concrete soakaways shall be dry jointed.

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5.3 PRECAST CONCRETE MANHOLES

5.3.1 General

1 Precast concrete manholes shall comply with the relevant provisions of the PWA, except as
amended in this Part.

5.3.2 Jointing of Precast Manholes

1 The jointing material for precast manholes shall be mortar or a proprietary bitumen or resin
mastic sealant, with the concrete surfaces primed with an appropriate sealant. The jointing
material which is extruded inside the manhole shall be trimmed off and joints pointed on
completion.

2 Units which bed onto bases shall be manufactured so that imposed vertical loads are
transmitted directly via the full wall thickness of the unit.

3 For joints between units and the underside of slabs, joint profiles shall be capable of
withstanding applied loadings from such slabs. Spigot ended sections shall only be used
where the soffit of the slab is recessed to receive them.

5.4 TESTING OF STRUCTURES RELATED TO DRAINAGE WORK

5.4.1 General

1 Testing of structures related to drainage work shall be done in accordance with the relevant
provisions of Part 6 of this Section.

END OF PART

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7 COMMISSIONING OF SYSTEMS ........................................................................................... 2

7.1 GENERAL ................................................................................................................................ 2

7.1.1 Scope 2
7.1.2 System Description 2
7.1.3 Submittals 2
7.1.4 Connection to Existing Mains 2
7.2 CLEANSING OF PIPES, MANHOLES AND CHAMBERS....................................................... 2
7.2.1 General 2
7.3 TESTING .................................................................................................................................. 3
7.3.1 General 3
7.4 TESTING AND INSPECTION EXTERNAL DRAINAGE PIPELINES....................................... 3
7.4.1 General 3
7.4.2 Inspection 3
7.4.3 Water Test 4
7.4.4 Air Test 4
7.4.5 CCTV Inspection 4
7.4.6 Infiltration 5
7.5 TESTING AND INSPECTION INTERNAL DRAINAGE PIPELINES ........................................ 5
7.5.1 Air Test 5
7.5.2 Leak Location 5
7.5.3 Water test 6
7.6 TESTING OF SANITARY APPLIANCES ................................................................................. 6
7.6.1 General 6
7.6.2 Self-Siphonage and Induced Siphonage in Branch Discharge Pipes 6
7.6.3 Induced Siphonage and Back Pressure in Discharge Stacks 7
7.7 TESTING OF DRAINAGE STRUCTURES .............................................................................. 7
7.7.1 Manholes and Chambers 7

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7 COMMISSIONING OF SYSTEMS

7.1 GENERAL

7.1.1 Scope

1 This Part specifies the requirement for the testing and cleaning of drainage installations.

2 Related Sections and parts are as follows: This Section

Part 1 General
Part 2 Internal Drainage Works
Part 3 External Drainage Works
Part 4 Trenches for Drainage Pipework
Part 6 Surface Water drainage

Section 1 General

7.1.2 System Description

1 Inspections and tests should be made during the installation of the discharge system as the
work proceeds, to ensure that the pipework is properly secured and clear of obstructing
debris and superfluous matter and that all work which is to be concealed is free from defects
before it is finally enclosed.

2 Prefabricated units should be tested at the works or place of fabrication, and inspected on
delivery at the Site.

7.1.3 Submittals

1 The Contractor shall prepare a detailed testing and inspection programme and submit it to the
Engineer for approval. This programme shall identify each item to be tested, the type of test to
be performed and the date and time of the test.

2 The Contractor shall prepare test and inspection record sheets for all tests and inspections
undertaken. The format of the test record sheets shall be to the approval of the Engineer. On
successful completion of a test/inspection, the test record sheet shall be signed and
stamped by all the Contractor and the Engineer. The Engineer shall retain the original test
record sheet.

7.1.4 Connection to Existing Mains

1 Connection to existing mains shall not take place until all tests and inspections have been
successfully completed and the system has been cleaned.

7.2 CLEANSING OF PIPES, MANHOLES AND CHAMBERS

7.2.1 General

1 On completion, the discharge system should be meticulously inspected to ensure that the
requirements of the Contract Documentation have been observed.

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2 The Contractor shall ensure that no cement droppings, rubble or other objects are left in or
on the pipes and that no jointing material projects into the pipe bore.

3 Manholes and chambers shall be thoroughly cleansed to remove all deleterious matter,
without such matter being passed forward to existing mains.

4 Sanitary appliances shall be thoroughly cleansed. Any chromium plated or other metallic
surfaces forming part sanitary appliances that exposed to view shall be polished.

5 All parts of the Works included in this Section shall be maintained in a clean and serviceable
condition by the Contractor until completion of the Contract.

7.3 TESTING

7.3.1 General

1 The Contractor shall notify the Engineer at least two clear working days prior to his intention
to test a section of pipeline.

2 Items failing any test shall be corrected immediately and re-tested before further work
proceeds.

3 Unless otherwise stated in the Project Documentation, the Contractor is responsible for
providing materials and apparatus required for testing purposes and for their removal and
proper disposal on completion at testing.

7.4 TESTING AND INSPECTION EXTERNAL DRAINAGE PIPELINES

7.4.1 General

1 Unless otherwise agreed by the Engineer, both interim and final test shall be undertaken on
each section of the Works. The Contractor shall note that the satisfactory completion of an
interim test does not constitute a final test.

2 Non-pressure pipelines laid in trenches shall be tested after they are jointed and before any
concreting or backfilling is commenced, other than such as may be necessary for structural
stability whilst under test.

3 The pipelines shall be tested by means of an air or water test or by a visual or closed circuit
television (CCTV) examination, in lengths determined by the course of construction.

4 A further test shall be carried out after the backfilling is complete.

7.4.2 Inspection

1 Visual inspection shall be carried out before backfilling in order to detect faults in
construction or material not shown up under test but which could lead to premature failure. A
careful record shall be kept of such inspections.

2 On external pipelines, the following shall be visually inspected:

(a) pipe bed

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(b) pipe line and level

(c) joints
(d) pipe protective coating
(e) any pipeline appurtenance.

3 Trenches shall be inspected to ensure that the excavation is to the correct depth to guard
against mechanical damage due to traffic loading.

4 No part of the pipe trench shall be backfilled until the above are performed to the satisfaction
of the Engineer.

7.4.3 Water Test

1 The test pressure for external drainage pipelines up to and including 750 mm nominal bore
shall be not less than 1.2m head of water above the pipe soffit or groundwater level,
whichever is the higher at the highest point, and not greater than 6m head at the lowest point
of the section. Steeply graded pipelines shall be tested in stages in cases where the
maximum head, as stated above, would be exceeded if the whole section where tested in
one length.

The pipeline shall be filled with water and a minimum period of 2 hours shall be allowed for
absorption after which water shall be added from a measuring vessel at intervals of 5
minutes and the quantity required to maintain the original water level noted. Unless
otherwise specified, the length of pipeline shall be accepted if the quantity of water added
over a 30 minute period is less than 0.5 litre per linear metre per metre of nominal bore. This
relationship in equation format, with water added measured in litres, can be written as
follows:

Maximum volume of water added over a 30 minute period = 0.5 x L x D Where:

L = pipe diameter (m)

D = Length of test section (m)

7.4.4 Air Test

1 Non-pressure pipelines to be air tested shall have air pumped in by suitable means until a
pressure of 100 mm head of water is indicated in a U-tube connected to the system. The
pipeline shall be accepted if the air pressure remains above 75 mm head of water after a
period of 5 minutes without further pumping following a period for stabilisation. Failure to
pass the test shall not preclude acceptance of the pipeline if a successful water test, ordered
by the Engineer, can subsequently be carried out in accordance with Clause 7.3.3.

7.4.5 CCTV Inspection

1 Where internal inspection of pipelines by CCTV is required, the Contractor shall provide all
necessary equipment, including suitable covered accommodation for viewing the monitor
screen, together with personnel experienced in the operation of the equipment and
interpretation of results.

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2 The intensity of illumination within the pipe and the rate of draw of the camera shall be such
as to allow a proper examination of the inside of the pipe. Provision shall be made for the
movement of the camera to be stopped and its position recorded and for permanent
photographs to be taken at any point requested by the Engineer.

7.4.6 Infiltration

1 External drainage pipelines shall be tested for infiltration after backfilling. All inlets to the
system shall be effectively closed, and any residual flow shall be deemed to be infiltration.

2 The pipeline shall be accepted as satisfactory if the infiltration, including infiltration into
manholes, in 30 minutes does not exceed 0.5 litre per linear metre per metre of nominal
bore. This relationship in equation format, with water infiltration measured in litres, can be
written as follows:

Maximum volume of infiltration over a 30 minute period = 0.5 x L x D Where:

L = pipe diameter (m)

D = Length of test section (m)

3 Notwithstanding the satisfactory completion of the above test, if there is any discernible flow
of water entering the pipeline at a point which can be located either by visual or CCTV
inspection, the Contractor shall take such measures as are necessary to stop such
infiltration.

7.5 TESTING AND INSPECTION INTERNAL DRAINAGE PIPELINES

7.5.1 Air Test

1 The water seals of all sanitary appliances should be fully charged and test plugs or bags
inserted into the open ends of the pipework to be tested.

2 To ensure that there is a satisfactory air seal at the base of the stack, or at the lowest plug or
bag in the stack if only a section of the pipework is to be tested, a small quantity of water
sufficient to cover the plug or bag can be allowed to enter the system.

3 One of the remaining test plugs should be fitted with a tee piece, with a cock on each
branch, one branch being connected by means of a flexible tube to a manometer.
Alternatively, a flexible tube from a tee piece fitted with cocks on its other tow branches can
be passed through the water seal of a sanitary appliance. Any water trapped in this tube
should be removed and then a manometer can be connected to one of the branches as
described above.

4 Air shall be pumped into the system through the other branch of the tee piece until a
pressure equal to 38 mm water gauge is obtained. The air inlet cock is then closed and
pressure in the system should remain constant for a period of not less than 3 min.

7.5.2 Leak Location

1 The use of smoke to detect leaks shall only be permitted if approved in writing by the
Engineer. A smoke producing machine may be used which will introduce smoke under

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pressure into the defective pipework. Leakage may be observed as the smoke escapes.
Smoke cartridges containing special chemicals should be used with caution, taking care that
the ignited cartridge is not in direct contact with the pipework and that the products of
combustion do not have a harmful effect upon the materials used for the drainage system.
Smoke testing of plastics pipework or systems with rubber jointing components is not
permitted.

2 With the pipework subjected to an internal pressure using the smoke machine or air test
method, a soap solution can be applied to the pipes and joints. Leakage can be detected by
the formation of bubbles.

7.5.3 Water test

1 There is not justification for a water test to be applied to the whole of the plumbing system.
The part of the system mainly at risk is that below the lowest sanitary appliance and this may
be tested by inserting a test plug in the lower end of the pipe and filling the pipe with water
up to the flood level of the lowest sanitary appliance, provided that the static head does not
exceed 6 m.

7.6 TESTING OF SANITARY APPLIANCES

7.6.1 General

1 To ensure that adequate water seals are retained during peak working conditions the tests
described below should be carried out. After each test a minimum of 25 mm of water seal
should be retained in every trap.

2 Each test should be repeated at least three times, the trap or traps being recharged before
each test. The maximum loss of seal in any one test, measured by a dip stick or small
diameter transparent tube, should be taken as the significant result.

7.6.2 Self-Siphonage and Induced Siphonage in Branch Discharge Pipes

1 To test for the effect of self-siphonage the appliance should be filled to overflowing level and
discharged by removing the plug; WC pans should be flushed. The seal remaining in the trap
should be measured when the discharge has finished.

2 Ranges of appliances, connected to a common discharge pipe, should also be tested for
induced siphonage in a similar way. The number of appliances which should be discharged
together is given in Table 6.1. The seal remaining in all the traps should be measured at the
end of the discharge. Only those appliances included in Table 6.1 shall be tested under
simultaneous discharge conditions.

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Table 6.1
Number of Sanitary Appliances to be Discharged for Performance Testing

Number of appliances of each

Number of appliances to be discharged simultaneously
kind on the stack

WC Wash Basin

1 to 9 1 1

10 to 18 1 2

19 to 26 2 2

27 to 52 2 3

53 to 78 3 4

79 to 100 3 5

7.6.3 Induced Siphonage and Back Pressure in Discharge Stacks

1 A selection of appliances connected to the stack should be discharged simultaneously and

the trap and seal losses due to positive or negative pressures in the stack should be noted.
These selected appliances should normally be close to the top of the stack and on adjacent
floors, as this gives the worst pressure conditions. Table 6.1 shows the number of
appliances which should be discharged simultaneously. Only those appliances included in
Table 6.1 shall be tested under simultaneous discharge conditions.

7.7 TESTING OF DRAINAGE STRUCTURES

7.7.1 Manholes and Chambers

1 Manholes and chambers shall be tested for infiltration after backfilling. Where appropriate,
they shall be inspected for water tightness before placing cover slabs.

2 Manholes and chambers shall be substantially water tight, with no identifiable flow of water
penetrating the structure. Manholes and chambers which are not substantially water tight
shall be corrected immediately.

END OF PART

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DRAINAGE WORKS

SL Brand Name Country of Local Agents

NO Description Origin
1 UPVC Pipes & Fittings 1 WADE United SATCO
Kingdom P.O.Box-8859
Tel:4415564
Fax;4422809

2 Terrain (UK) UK SATCO Trad.

P.O.Box-8859
Tel;4415564
Fax:4422809
3 Hepworth (UK) UK Al Andulus Trading
P.O.Box-24155
Tel:4432822
Fax:4354322
4 Gulf Dura Dubai NEPRO,qatar
Industries P.O.Box-23783
Tel;44514833
Fax:44514832
5 Sappco Aplaco Kingdom of Tadmur Cont.& Trad.
(KSA) Saudi Arabia P.O.Box-6984
Tel:4413628
Fax:4410812
2 Floor Gulley and Channels 1 WADE UK SATCO
P.O.Box-8859
Tel:4415564
Fax;4422809

2 FROST United Al Andulus Trading

Kingdom P.O.Box-24155
Tel:4432827
Fax:4354322

3 Hepworth (UK) UK Al Andulus Trading

P.O.Box-24155
Tel:4432822
Fax:4354322
4 Terrain (UK) UK SATCO Trad.
P.O.Box-8859
Tel;4415564
Fax:4422809
5 Dallmer Germany Al Tayeb
P.O.Box-1401
Tel:4419224
Fax:4321751
3 Manhole Covers & Frames 1 Stanton United Tadmur Cont.& Trad.
Kingdom P.O.Box-6984
Tel:4413628
Fax:4410812

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2 Stanley United Tadmur Cont.& Trad.

Kingdom P.O.Box-6984
Tel:4413628
Fax:4410812
3 Glynwed United Tadmur Cont.& Trad.
Kingdom P.O.Box-6984
Tel:4413628
Fax:4410812
4 Floor Drain & Clean out 1 WADE UK SATCO
P.O.Box-8859
Tel:4415564
Fax;4422809
2 FROST United Al Andulus Trading
Kingdom P.O.Box-24155
Tel:4432827
Fax:4354322

3 Hepworth (UK) UK Al Andulus Trading

P.O.Box-24155
Tel:4432822
Fax:4354322
4 Terrain (UK) UK SATCO Trad.
P.O.Box-8859
Tel;4415564
Fax:4422809
5 Roof Drain 1 WADE UK SATCO
P.O.Box-8859
Tel:4415564
Fax;4422809
2 FROST United Al Andulus Trading
Kingdom P.O.Box-24155
Tel:4432827
Fax:4354322
3 Hepworth (UK) UK Al Andulus Trading
P.O.Box-24155
Tel:4432822
Fax:4354322
4 Terrain (UK) UK SATCO Trad.
P.O.Box-8859
Tel;4415564
Fax:4422809
6 Grease /Oil /Fuel Separator 1 Hepworth (UK) UK Al Andulus Trading
P.O.Box-24155
Tel:4432822
Fax:4354322
2 Jr. Smith USA

3 Kessel Germany

4 Zurn USA

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7 Waste Water Treatment 1 Protec Qatar

system (STP)

2 Metito UAE

3 Nelco USA

4 Sepam Ireland

8 Soil, Waste, Vent & Storm 1 Zurn USA

Water System

2 MFAB USA

3 JR. Smith USA

4 Terrain UK

5 Frost UK

6 Wade UK

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Section 22 AIR CONDITIONING
REFRIGERATION AND
VENTILATION
Part 1 General
Part 3 Unitary Equipment
Part 6 Ductwork and Airside Equipment
Part 7 Thermal Insulation
Part 8 Exhaust Fans
Part 9 Accessories

Addendum

Preferred Vendors List

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1 GENERAL ................................................................................................................................ 2
1.1 INTRODUCTION ...................................................................................................................... 2
1.1.1 Scope 2
1.1.2 References 2
1.1.3 Standard of Work 2
1.1.4 Data to be Supplied with Tender 3
1.1.5 Practical Completion Certificate 3
1.1.6 Air Conditioning Subcontractor 3
1.1.7 Design Data 4
1.1.8 Rating for Continuous Service and Local Ambient Condition 5
1.1.9 Quality of Materials and Equipment 6
1.1.10 Cleaning 6
1.1.11 Accessibility 6
1.1.12 Cutting and Patching 6
1.1.13 Inserts, Sleeves, Escutcheons and Curbs. 7
1.1.14 Access Panels and Doors 8
1.1.15 Flashing 9
1.1.16 General Welding Requirements 9
1.1.17 Testing for Welder Qualification 10
1.1.18 Testing of Welded Pipework Installation 11
1.1.19 Painting, Tags, Name Plate Identification and Colour Coding 12
1.1.20 Contract Drawings 14
1.1.21 Construction Drawings 14
1.1.22 Shop Drawings 14
1.1.23 Record Drawings 16
1.1.24 Storage of Materials and Equipment 16
1.1.25 Inspection of Material Prior to Installation 16
1.1.26 Inspection, Testing and Adjusting 17
1.1.27 Testing 19
1.1.28 Instructions for Operation and Routine Maintenance 19
1.1.29 Maintenance 20
1.1.30 Warranty 20

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1 GENERAL

1.1 INTRODUCTION

1.1.1 Scope

1 This Part details the requirements for air conditioning, refrigeration and ventilation systems. It
shall apply to all mechanical and electrical systems and equipment.

2 Related Sections are as follows:

Section 1 General
Section 5 Concrete
Section 10 Instrumentation, Control and Automation Section 16 Structural Metal Work
Section 17 Metal Work
Section 21 Electrical Installations

1.1.2 References

1 The following standards are referred to in this Part:

ASHRAE.....................Standard 52.1 - 1992 Gravimetonic and Dust spot Procedures for
testing air cleaning devices

BS 1710......................Identification of building services pipework

BS 1724......................Bronze welding by gas
BS 2600......................Radiographic examination of fusion welded butt joints in steel
BS 2640......................Class II oxy–acetylene welding of carbon steel pipework for carrying
fluids
BS 2910......................Radiographic examination of fusion welded circumferential butt joints
in steel pipes
BS 2971......................Class II arc welding of carbon steel pipework for carrying fluids
BS 4515 ..........................Process of welding steel pipelines on land and off-shore

1.1.3 Standard of Work

1 The Contractor shall install equipment, air conditioning ducts, conduit and piping in a
workmanlike manner to present a neat appearance and to function properly to the
satisfaction of the Engineer. Air conditioning ducts and pipes shall be installed parallel and
perpendicular to the building planes. All piping and ductwork shall be concealed in chases,
behind furring, or above ceiling, except in unfinished areas. All exposed systems shall be
installed neatly and be grouped to present a neat appearance.

2 All gauges, thermometers, etc., shall be installed in such a way as to facilitate easy
observance.

3 All equipment and apparatus, which requires maintenance, adjustment or eventual

replacement, shall be installed making due allowance for access.

4 Control sensors shall be installed to guarantee proper sensing. Elements shall be shielded
from direct radiation and shall avoid being placed behind obstructions.

5 All panels and boards, etc., shall be installed to remit easy operation.

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6 The Contractor shall include in the work all the requirements of the manufacturer’s as shown
on their drawings.

7 The Contractor shall replace all work not performed to the satisfaction of the Engineer
without extra cost and to the standard required by the Engineer. This applies to any item that
is found to be defective in service during the maintenance period, or extended maintenance
period as appropriate.

8 Where height dimensions are given, the installation shall be reasonably expected to be within
13 mm of actual position.

9 Items displaying a horizontal dimension or edge must be plumbed with a level and must be to
the Engineer’s satisfaction. Any apparent discrepancy between “level” electrical and
mechanical items and adjacent items MUST be reported immediately to the Engineer.

10 All work shall be co-ordinated with other works so as not to obstruct equipment and
apparatus which requires maintenance, adjustment or eventual replacement.

11 Manufacturers and subcontractors shall operate an ISO 9000 approved quality system or
equivalent in house system. If requested, details of the quality system shall be submitted to
the engineer.

12 Equipment shall conform to the requirements of the Project Documentation and reference
standards.

13 All equipment furnished shall be new, and where feasible shall be a standard product of an
experienced or approved manufacturer, and assembled from standard components readily
available.

1.1.4 Data to be Supplied with Tender

1 Initial technical submissions are to accompany the bid including full technical details of every
item of equipment proposed for the Project, with the appropriate figures and details
highlighted in marker pen or similar in standard manufacturer’s catalogues.

2 After final checking of sizing after award of contract, re-submission shall be made with any
changes specifically noted.

3 Technical submissions shall be submitted for all equipment as specified in the Project
Documentation.

4 In the even that the Engineer requires further information on any of the proposed items the
Contractor shall arrange visits to similar units that he has installed. In an event, all equipment
proposed for the Project shall be currently installed and working satisfactorily locally. The
Contractor must be able to provide references of at least three satisfied Owners and
Engineer with equipment of the particular size and model proposed.

1.1.5 Practical Completion Certificate

1 A Practical Completion Certificate for works included in this Section shall only be issued
when the Engineer is satisfied that all the requirements of this Section have been met.

1.1.6 Air Conditioning Subcontractor

1 The air conditioning services subcontractor shall be responsible for co-ordination with other
trades and services and shall provide all materials, labour and supervision, equipment, tools,
appliances, services, etc. for the supply and installation of the following items or work:
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(a) air conditioning and ventilation plant and equipment.

(b) insulated ductwork complete with air terminals, dampers, supports, etc.
(c) chilled water pipework complete with valves, fittings supports, etc.
(d) controls and control panels
(e) motor control centres and starter panels complete with cabling from the panels to the
respective equipment. Power supply up to the panel shall be the responsibility of the
electrical subcontractor
(f) insulated drain piping from each air handling unit fan coil unit to the nearest drain
point. The drainage subcontractor shall be responsible for provision of a floor drain in
each mechanical room location to be co-ordinated with air handling units (AHU).

2 The contractor shall also include all overheads at office and site, labour, sundries, plant,
appliances and consumable both for the Works and for testing and commissioning, and
during the maintenance period.

3 The air conditioning subcontractor shall be approved so as to meet all QGEWC regulations.

1.1.7 Design Data

1 Design parameters. Design, in general, shall be based on ASHRAE recommendation in

addition to the following particular requirements:

2 Design Conditions
o o
(a) external (Summer) : 52 C Dry Bulb, 34 C Wet Bulb
23 ± 1 C Dry Bulb, 50 ± 5 % RH
o
(b) Internal :

3 Fresh air supply. One air change - minimum quantity as indicated on drawings.

4 Noise levels

In general, the following noise ratings shall not be exceeded for central A/C plants:

DbA NCLevel

General Office 40-45 35-40

Private Office 35 30

Meeting Rooms 35 30

Corridor 45 40

Library 35 30

Cafeteria 50 45

Auditorium 35 30

Mosque 35-40 30-35

Class Room 40 35

Manned Control rooms 40-45 35-40

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5 Solar load. Solar loads shall be based on maximum instantaneous values in appropriate
direction for consideration of the worst exposure calculations. They shall also be based on
the worst cumulative block load when checked on any hourly basis from 10 AM to 6 PM over
the period May to October, coincident with the maximum outside ambient as listed above.
Values as listed in ASHRAE or CARRIER SYSTEM MANUAL for 20 º north will be
acceptable.

6 Air Filtration
Based on ASHRAE 52.1 - 1992
Primary filters (flat panel) : 95 % Gravimetric
Secondary filters (bag) : 60 % Opacimetric
7 Chilled water to cooling coils
o
Chilled water inlet temperature : 7 C
o
Chilled water outlet temperature : 12 C
Maximum velocity of water through pipework : 2.43 m/s
Pipes to be sized for full flow rate of all cooling
coils Maximum coil face velocity : 2.5 m/s
8 Air Distribution
Duct Velocity, supply : 5 m/s
Duct Velocity, return : 4 m/s
Duct Velocity, Kitchen exhaust : 10 m/s
Higher velocities are permissible in the ducts located in the shafts

9 Fire Philosophy. Smoke detectors shall be positioned in return air ductwork of Air Handling
Units (AHU). A fire condition sensed by the smoke detectors shall shut off the relevant AHU
through the fire annunciation panel. Smoke detectors installed within rooms shall be
interlocked with the fan coil unit serving the respective room such that the fan coil unit will be
shut off in a fire situation through the fire annunciation panel. Fire dampers shall be
positioned in all ductwork crossing firewalls. Fire dampers shall be included in return and
extract ductwork at each fire zone crossing. They shall be triggered from a fusible link
connection sited in the damper.
Note: The above data that is mentioned in items 7 & 8 could vary subject to project
specification.
1.1.8 Rating for Continuous Service and Local Ambient Condition

1 The design of the Plant shall be in accordance with the latest good engineering practice. All
parts shall be of ample strength to withstand without failure or injury the maximum
mechanical and electrical stresses to which they may be subjected in the course of operation
of the plant.

2 The Works shall be designed to facilitate inspection, cleaning, and ease of maintenance and
operation in which continuity of service and reliability is the primary consideration. The design
shall incorporate every reasonable precaution and provision for the safety of all concerned in
the operation and maintenance of the plant.

3 All plant and equipment shall be suitable for operation under the prevailing ambient
conditions at site and all special requirements for thermal insulation, finish, painting and
lubrication etc. shall be incorporated.

4 Except where otherwise stated, all equipment shall be constructed and sealed as to prevent
damage by the ingress of wind blown sand and other matter. All equipment shall be suitable
for operation over the ambient temperature range 0 °C to 55 °C.

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5 Except where otherwise stated in the Project Documentation, the declared ratings for all
equipment shall be for continuous operation in final service position for the following
environmental criteria.

(a) maximum daily average ambient temperature of 50 °C

(b) relative humidity of 80 %
(c) altitude 20 m above sea level.

These criteria shall be achieved independently of any forced means of mechanical ventilation
or air conditioning plant.
1.1.9 Quality of Materials and Equipment

1 All materials used on the Project shall be brand new and of high quality. Obtain approval of
all manufacturers from the Engineer and Owner.

2 New is defined as newly manufactured, state of the art, tested and proven item of equipment.
Items that have been held in stock for any extended period of time by either the manufacturer
or the supplier will be rejected.

1.1.10 Cleaning

1 Each day as the work proceeds, and on completion, the Contractor shall clean up and
remove from the premises all rubbish, surplus material, equipment, machinery, tools,
scaffolds, and other items used in the performance of the work. The Contractor shall clean
out dirt and debris and leave the buildings broom clean with no stains and in a condition
acceptable to the Engineer.

2 Where electrical items form part of the visible finish in the rooms, the Contractor shall protect
them from over-painting, etc. and shall give all items a final cleaning before handing over.

1.1.11 Accessibility

1 Each item of equipment shall be located so as to be accessible for maintenance or repair

without removing adjacent structures, equipment, piping, ducts, or other ducts, or other
materials. For large air handling units the Contractor shall ensure that these can be
assembled on site from components taken into the area.

2 Clean outs shall be located to permit rodding of all drain lines. These shall be located
wherever possible external to occupied areas, and to minimise spillage problems during
rodding.

1.1.12 Cutting and Patching

1 The Contractor shall Inform all other Divisions in time concerning required openings. Obtain
the approval of the Engineer before doing any cutting.

2 In existing work and in work already finished as part of this contract, all cutting and patching
will be carried out at the expense of this Contractor. Where finishing work is involved, this will
only be reinstated by the Contractor responsible for the original work. The Contractor shall
obtain the approval of the Engineer before doing any cutting. Supporting members of any
floor, wall or the building structure shall only be cut and in such a manner as approved by the
Engineer. All reinstatement work must be done to the same standard as the original work.

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1.1.13 Inserts, Sleeves, Escutcheons and Curbs.

1 The Contractor shall use only factory made, threaded or toggle type inserts as required for
supports and anchors, properly sized for the load to be carried. The inserts shall be place
only in portions of the main structure and not in any finishing material.

2 The Contractor shall use factory made expansion shields where inserts cannot be placed, but
only where approved by the Engineer and for light weights.

3 The Contractor shall not use powder activated tools except with the written permission of the
Engineer.

4 The Contractor shall supply and locate all inserts, holes anchor bolts, and sleeves in good
time when walls, floors, and roof are erected.

5 The Contractor shall ensure that insulation is unbroken where pipe or duct is insulated. Size
sleeves shall be sized to provide adequate clearance all around.
6 The following materials shall be used for pipe sleeves:

(a) through all interior walls above grade, standard weight galvanized steel pipes,
machine cut, flush with finished structure. The Contractor shall check the room
finishes schedules.
(b) through all exterior walls above grade, standard weight galvanized steel pipes
machine cut, flush with finished structure inside and to suit flashing on outside
(c) through al exterior walls below grade and all other waterproof wall use extra heavy
weight cast iron sleeves, machine cut. Refer to Section 14, Roofing, for further
details.
(d) through all waterproof floors, janitor’s closets, mechanical rooms kitchens, roofs, use
extra heavy weight cast iron sleeves, machine cut. As an alternative, copper DWV
2
sleeves up to and including 150 mm sleeve size and rolled 10 kg/m copper sleeves
for larger than 150 mm may be used. The sleeves shall be extended 100 mm above
finished floor level upwards and cut flush with underside of floor. The Contractor shall
make particular reference to flashing details through waterproof floors
(e) approved type plastic sleeves may be used as an alternative for standard weight
galvanized sleeves in interior areas if approved in writing by the Engineer
(f) the Contractor shall provide 100 mm high, 100 mm wide watertight concrete curbs with
20 mm chamfered edges around all pipes passing though waterproof floors except
where furred in. Concrete works shall be done in accordance with Section 5,
Concrete.

7 The Contractor shall pack all sleeves between the insulated pipe and the sleeve or where
uninsulated between the pipe and the sleeve with polyurethane insulation. Seal the annular
space as follows:

(a) for all horizontal sleeves in exposed areas, the Contractor shall use a seal equal or
better fire rated than the wall to be sealed
(b) for horizontal concealed sleeves through fire walls and through walls separating areas
of different air pressure, use a permanently resilient silicone based sealing compound.
(c) for all vertical sleeves through roofs, janitor’s closets, equipment rooms, use
permanently resilient silicone based sealing compound, non-inflammable and
waterproof.

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8 The Contractor shall ensure that the seal is compatible with the floor and ceiling finishes. The
room finishing schedules shall be checked for further details and clarified if necessary with
the Engineer.

9 The following sleeving shall be used for ducts: The minimum thickness of duct material
passing through a sleeve shall be 1.3 mm. For rectangular duct openings through walls and
floors a removable hardwood box-out shall be provided of the required size, soft wood or
plywood will not be acceptable. Through fire walls, build fire dampers into wall, or make
detailed fixing in accordance with Engineer’s instruction. Through floors where ducts are not
furred in or enclosed in a duct shaft, provide 100 mm high and 100 mm wide watertight
concrete curbs, with 25 mm chamfered edges all around. Extend sleeves where used flush to
top of curb. Concrete works shall be done in accordance with Section 5, Concrete. Through
floors where duct is enclosed in a duct shaft or furred in, provide the watertight curbs at the
extreme top and bottom only. Cover exposed floor and wall pipe sleeves in finished areas
with satin finish chrome or nickel plated solid brass or with satin finished stainless steel
escutcheons with non-ferrous set screws. Split cast plates of the screw locking type may not
be used. Do not use stamped steel friction type split plates. Through roofs, provide curbs and
sleeves as shown on drawings and to suit flashing requirements.

10 After ducts are installed, the openings shall be packed and sealed as follows:-

(a) fibreglass insulation for packing except through curbed concrete floors where a fibre
proof packing must be used
(b) fibre proof packing shall be sealed in openings through floors with permanently
resilient silicone base non inflammable waterproof compound; duct supports shall be
pressed firmly down into caulking before bolting it down to curb
(c) through all vertical walls, seal the fibreglass packing using permanently resilient
silicone based sealant.

11 Duct sleeves and box-outs shall be braced to retain their position and shape during the
pouring of concrete and other work.

12 Bracing for each duct at ever passage through structure shall be provided to prevent sagging.

13 Exposed duct sleeves and openings shall be covered in exposed areas. 100 mm long
galvanized steel escutcheons shall be used in the form of a duct collar. Over curbs, the collar
shall be extended 30 mm down the side of the curb, similar to counter flashing. The collar
shall be fixed in place with Cadmium plated screws.

1.1.14 Access Panels and Doors

1 The Contractor shall install all concealed mechanical equipment requiring adjustment or
maintenance in locations easily accessible through access panels or doors. Install systems
and components to result in a minimum number of access panels. Indicate access panels on
as-built drawings.

2 The Contractor shall prepare drawings showing the location and type of all access doors in
co-ordination with other trades before proceeding with installation and hand these to the
Engineer to obtain approval. On smaller Projects, the Contractor shall indicate on the ceiling
plans access required at the discretion of the engineer.

3 All access doors shall be sized to provide adequate access commensurate with the type of
structure and architectural finish. Should it be necessary for persons to enter, a minimum
opening of 600 x 450 mm shall be provided.

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4 Proper fire rating of access doors shall be ensured in fire separations.

5 Lay-in type ceiling tiles, if properly marked may serve as access panels.

6 The Contractor shall provide panels in glazed tile walls of 2.6 mm thick 304 alloy stainless
steel, with no. 4 finish, with the recessed frame secured with stainless steel, countersunk,
flush-headed screws.

7 Panels in plaster surfaces shall be provided with dish shaped door and welded metal lath,
ready to take plaster. A plastic grommet shall be provided for door key access.

8 Details of other types of access doors shall be submitted to the Engineer for approval.

1.1.15 Flashing

1 The Contractor shall provide flashing to all mechanical and electrical parts passing through or
built into a roof, outside wall, or waterproof floor.

2
2 49 kg/m sheet lead flashing shall be provided for cast iron sleeves passing through roof.
Factory manufactured flange plates shall be provided to flash PVC-U pipes passing through
roofs.

2
3 7 kg/m copper flashing shall be provided for copper sleeves passing through roof where
copper sleeves are used for copper pipework

4 All flashing shall suit the roof angle and shall extend a minimum of 400 mm on all sides. The
Contractor shall build the flashing into the roofing system to render a completely watertight
connection.

5 Counter flashing shall be provided on all stacks, ducts, and pipes passing through roofs to fit
over the flashing or curb.

6 Pipes through waterproof floors shall be flashed as per approved details.

7 Provide pipes and sleeves passing through outside walls with lead or copper flashings and as
directed by the Engineer. All visual aspects of such sleeves to be approved by the Engineer.
All sleeves shall be installed according to the relevant standard and shall be suitable for local
ambient conditions.

8 The Contractor shall pay special attention to the waterproof conditions of basements and
walls and floors that may exist. The Contractor shall ensure co-ordination at all times with the
waterproofing trade to prevent damage to any water proofing seal. The Contractor shall
provide piping sleeves passing through waterproof walls which shall be sealed to the
satisfaction of the Engineer.

1.1.16 General Welding Requirements

1 All welding shall be generally in accordance with BS 4515. This will be modified where
appropriate for other materials and may be relaxed or varied by order of the Engineer,
provided that the Contractor has made a comprehensive request for an alternate.

2 Tack welds shall be performed by fully qualified welders and all tack welds shall be of a
length equal to twice the pipe thickness and shall fully penetrate the pipe walls.

3 Where welding is carried out in the proximity of inflammable materials special precautions
shall be taken to prevent risk of fire or other damage to the building fabric.

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4 Where oxyacetylene cutting equipment or any welding plant is being used by an operative for
any of part of the Works, then fire extinguishers shall be supplied and carried as part of the
equipment. The operators of cutting and welding equipment shall be trained in the use of the
fire extinguishers which they carry and all extinguishers shall be fully charged and ready for
use. In all cases, extinguishers shall be positioned immediately adjacent to the position
where cutting and welding is being carried out and shall be readily accessible for use in the
event of an emergency.

5 All accommodation, benches, tools, welding plant, acetylene, oxygen or electricity, filler rods
and electrodes, which are necessary for installations where welding is required, shall be
provided as part of this Contract.

6 All welded pipe assemblies shall be constructed so that individual welded joints do not affect
each other. The distance between the centres of adjacent welds shall be not less than twice
the bore diameter of the pipe.

7 No welded joints shall be left partially completed. Any joints tacked in position must be
promptly finished within the working day. The Engineer will reject all work not done in
accordance with this instruction.

8 Where work is rejected, pipes must be machine cut at least 150 mm either side of rejected
welds and proper weld preparation must be used on the shortened sector. Where shorter fill-
in sections are required because of such rejection and re-working, then new full sized lengths
must be supplied by the Contractor.

9 Where pipes with longitudinal seams are specified, pipes seams shall be arranged such that
adjacent seams are opposed 45 º from each side of top dead centre and branches shall be
made only with weldable fittings.

10 All filler metals that are coated shall be protected from excessive moisture changes. Filler
materials or fluxes that show any sign of deterioration shall not be used. If instructed by the
Engineer, samples of filler rods to be used shall be submitted for approval before any work is
done on site. These may be submitted, at the Contractor’s cost, to an independent testing
laboratory for verification.

1.1.17 Testing for Welder Qualification

1 The purpose of the welder’s qualification tests is to determine the ability of the welders to
make sound and acceptable welds. Before any site welding on the contract is allowed, each
proposed welder shall carry out the tests required in the presence of the Engineer.

2 A responsible person shall keep any weld test specimens that have been suitably marked
and approved on site, so that they can be produced at any time, at the request of the
Engineer.

3 All accommodation, benches, tools, welding plant, acetylene, oxygen, electricity, test pieces,
filler rods, electrodes, facilities for cutting and grinding, polishing, bending and examining,
which are necessary for welders qualification tests shall be provided by the Contractor. In the
absence of any items for inspecting the welds, the Engineer may submit the finished samples
to an independent laboratory for testing at the Contractor’s expense.

4 Under no circumstances shall a welder be employed on the Works, either on or off the site,
for welding operations other than those for which that welder is qualified.

5 Copies and records of all test reports shall be promptly given to and kept by the Engineer.

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6. For tests for Qualification on Steel Pipes, each test shall be carried out in accordance with
the test procedures laid down in BS 2640 and BS 2971. The test position shall be similar to
the working conditions expected to be encountered and test pieces shall not be rotated to suit
any individual welding procedures. Each test sample shall be subjected to the following
examinations and test.

(a) Pipes up to 100 mm diameter shall undergo visual examination and normal tongue
bend test and X-ray test
(b) Pipes over 100 mm diameter shall undergo visual examination and 2 normal tongue
bend tests and two reverse bend tests and X-ray tests.

7. The Engineer may at his discretion require macro-etch examination in the event of any doubt.
For a successful test, the weld shall conform in all respect to the requirements of the relevant
British Standard. Each welder who qualifies shall be issued with a metal punch with an
identifying number and shall stamp adjacent to each weld. If any test sample does not reach
the required standard, two further welds shall be made and tested as detailed. Both of the re-
tests shall be successful for the welder to qualify for the work.

8. or testing for Qualification on Copper Pipes, each test shall be carried out in accordance
with the test procedures laid down in BS 1724. The test position shall be similar to the
working conditions expected to be encountered and test pieces shall not be rotated to suit
any individual welding procedure. Each test sample shall be subjected to the following tests
and examinations.

(c) visual
(d) flattening test
(e) micro examination

For a successful test, the weld shall conform in all respects to the requirements laid down in
BS 4515. Other conditions are similar to the above for steel pipes.

1.1.18 Testing of Welded Pipework Installation

1 Testing of welded pipework installations shall be by either destructive or non destructive test
methods as detailed in the following schedules.

2 All services 75 mm and below shall have two joints per floor for destructive testing. All
services above 75 mm shall have two joints per floors for non-destructive testing. If a weld
fails the testing requirements, then two additional welds made by the same operative shall be
tested, at no additional cost. If both additional welds are successful, then in the case of
destructive testing, the cost of making good shall be at no additional cost. If either of the two
additional welds fail the test requirements, then further tests on other or all of the welds made
by that operative shall be carried out, at the Engineer’s discretion. All costs resulting from
either of the two additional welds failing the test requirements shall be at no cost to the
Contract. If either of the two additional welds fail, then the operative concerned shall not
make any further welds on any service unless approved by the Engineer.

3 The detailed requirements concerning testing shall be as follows:

(a) destructive testing. Destructive testing and examination shall be exactly as detailed
under Tests for Welder Qualification
(b) non-destructive testing shall consist of radiographic inspection to comply with BS
2600 and BS 2910. Non-destructive testing shall be carried out by a specialist
company approved by the Engineer

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(c) the specialist company shall provide a report on the radiographic tests which have
been made, including an interpretative results section. The report and films shall be
handed to the Engineer
(d) the material of the image quality indicator shall be radiographically similar to that of
the filler metal under examination
(e) the use of x-ray and gamma radiation sources shall be in strict accordance with the
requirements of the Ionising Radiation (Sealed Sources) Regulations.
(f) the required radiographic sensitivity shall not be more than two, and the required
image details shall be readily seen on each radiograph
(g) radiographs which do not comply with this requirement, whatever the cause, shall be
unacceptable and the weld in question shall be re-examined at no cost to the
Contract. All interested parties shall be advised well in advance where and when
radiographic tests are to be conducted, in order that appropriate precautions may be
taken
(h) macro-examinations. When the Engineer requires macro examinations, these shall
be carried out by a specialist company who shall present etched section photographs
and a report on the tests to the Engineer. All costs for these tests are to be borne by
the Contractor.

1.1.19 Painting, Tags, Name Plate Identification and Colour Coding

1 All painting of plant, equipment, storage vessels, and the like, and all surfaces to be painted
in the areas where such items are installed, including generator areas, condenser areas, etc.
shall be carried out by an approved specialist painting contractor.

2 Painting shall be applied to all pipework and associated pipework components, valves,
fittings, etc. equipment, supports of any kind, insulation, plain mild steel, copper, or cast iron
surfaces. Where movement is required between adjacent surfaces, the Contractor shall
request clarification from the Engineer.

3 The following items do not require site painting:

(a) Insulation having any of the following finishes:

(i) aluminium foil
(ii) metalwork
(iii) polyisobutylene sheeting/bitumen coating
(iv) vinyl-glass/resin-aluminium foil laminate

(b) equipment or plant or supports or frames delivered to site with any of the following
finishes:
(i) painted finish, other than printed only, provided that the finish is not damaged
in any way
(ii) stainless steel or plastic coated steel
(iii) stoved enamel.

4 All surfaces to be painted shall be prepared by thoroughly cleaning and removing all rust,
grease, oil, dirt and surface corrosion, using wire brush, emery paper and/or degreasing
medium as required. The paint shall be applied in accordance with the manufacturer’s
instructions and the type of paint to be used shall be in accordance with the following:-

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(a) ferrous surface, one coat of zinc chromate primer plus wash primer as necessary,
followed by 2 undercoats, and one finishing coat.
(b) (non-ferrous surface, one coat of zinc chromate primer plus wash primers as
necessary, followed by 2 undercoats, and one finishing coat.
Approved manufacturers shall supply all paint.
5 For factory applied finishes, repainting or refinishing of any surfaces damaged during
shipping, erection or construction shall be done using only factory supplied materials.
6 After finished painting is completed, each piped and ducted service shall be identified, and
identification and flow arrows located.

(a) behind each access door

(b) at each change of direction on all joining pipes and ducts
(c) at not more than 10 m in straight runs of exposed pipes and ducts, but on both sides
of sleeves
(d) at not more than 10 m apart in straight runs of pipes and ducts behind removal
enclosures such as lay-in ceiling but on both sides of sleeves
(e) above each floor or platform for vertical exposed pipes, preferably 1.5 m above
floor or platform level.

7 PVC tape identifying bands will not be accepted.

8 Stencils and stencil paint shall be used on all piping and ductwork. letters a minimum of 30
mm high shall be Used. After completion of the Works, the Contractor shall provide to the
Engineer usable stencils for each service.

9 Wherever insulation is to be painted, the paint used shall comply with all the fire resistance
requirements for insulation finish, and shall be carried out by the insulation subcontractor. In
all cases, the actual grade of paint to be used shall be suitable for the operating surface
temperature and shall be approved by the maker for the application concerned. In certain
cases, the grade of finishing coat may not require the application of undercoats in which case
these may be omitted, provided that the Engineer’s approval in writing is obtained
beforehand. All insulated or un-insulated pipework in concealed positions shall be identified
by means of 75 mm wide identification bands, painted neatly on and at right angles to the
pipe axis at intervals not greater than 3 m. In addition to the name of the service and pipe
diameter shall be stencilled on in a visible position with an arrow indicating the direction of
flow. Flow and returns shall have the letter “F” or “R” added to the identifying name. The
identifying band colours and the finishing colour of the services to be painted shall be in
accordance with the colours and procedures given in BS 1710. Ductwork shall be identified in
accordance with the procedures laid down in HVAC Code of Practice No. DW 144.

10 All equipment located in concealed positions shall have a nameplates secured to the item
giving the following information.
Equipment reference number (as indicated on the record drawings). System
Room/Area served Duty/output information
11 The name plate shall be 100 x 100 mm approximately, of white plastic 3 mm thick with the
above information engraved in black lettering and the plate shall be secured by screws, bolts,
clips, etc. as appropriate to the item concerned. This plate is in addition to any name plate
supplied by the manufacturer of the item giving detailed specification information for the
equipment.

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1.1.20 Contract Drawings

1 The drawings included in the Project Documentation are diagrammatic, and intended to
convey the scope of work and indicate general arrangement and approximate locations of
apparatus, fixtures, pipe and duct runs, etc. The drawings are not intended to indicate
Architectural or Structural details, nor do they show any fabrication or installation details.

2 Do not scale drawings. Obtain accurate dimensions to structure and architectural items from
drawings of those trades. Confirm by site measurement. The Contractor shall verify the
location and elevation of all services (water, electrical, telephone, sanitary, storm drainage,
gas, etc.) before proceeding with the work.

3 The Contractor shall install all ceiling mounted components (diffusers, grilles, detectors, light
fixtures, emergency lights, fire detectors, loudspeakers, camera points, etc.) in accordance
with the reflected ceiling drawings which are to be prepared by the Contractor and co-
ordinated with all trades. These must be submitted for approval and be approved before any
work commences on site.

4 Sufficient space shall be left clear to install all work to accommodate future materials and/or
equipment as indicated and/or supplied by another trade. All pipe runs, conduit runs, cable
trays etc. shall be installed to maintain maximum headroom and clearances, and to conserve
space in shafts and ceiling spaces and under floors, and to provide adequate space for
service and maintenance.

5 The exact location of outlets and fixtures shall be confirmed on the site, also the locations of
outlets and fixtures provided by any other trade shall be confirmed.

1.1.21 Construction Drawings

1 The Contractor shall prepare drawings in conjunction with all trades concerned in the Works,
showing sleeves and openings for all passages through the structure and all insert sizes and
locations.

2 Composite construction drawings shall be prepared of piping and equipment in tunnels,

shafts, mechanical equipment rooms and areas, and all other critical locations to avoid a
conflict of trades that are fully dimensioned. The equipment drawings shall be based upon
shop drawings and include but not necessarily limited to, all details pertaining to access,
clean outs, tappings, sleeves, electrical connections, drains, location and elevation of pipes,
ducts, conduits, etc. obtained from consultation with, and agreement of, all trades involved.

3 The Contractor shall prepare drawings of equipment bases, pump pits, anchors, inertia slabs,
floor and roof curbs, wall openings, trenches, pertaining to mechanical work.

4 All drawings shall be prepared to scale and dimension. These shall be forwarded, after
approval by the trades concerned to the Engineer for his records. Transparencies and printed
copies shall be provide in the number specified in the Project Documentation, but in any case
not less than four sets.

5 The Contractor shall bind one complete set of construction drawings showing “as built”
conditions in each operating and maintenance instruction manual. The extent of these
drawings will be indicated to the Contractor in advance by the Engineer.

1.1.22 Shop Drawings

1 The Contractor shall submit shop drawings and samples for materials and equipment as

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listed in this and in each subsequent section. Transparencies shall be provided wherever
possible as well as printed copies in the number specified in the Project Documentation. The
Engineer may retain the sample of each item at his discretion until the completion of the
Works.

2 The Contractor shall submit to the Engineer a schedule of shop drawings after award of the
Contract, in accordance with programme detailed in the Project Documentation. The
schedule shall indicate the anticipated date when the drawings will be submitted for review.
The Contractor shall be fully responsible for the timely submission of all drawings. An
allowance of three weeks shall be made for the Engineer’s review period. At time of
submission, the Contractor shall indicate any other constraints and associated cost
implications resulting from the programme, etc. otherwise the Engineer will advise the Owner
that cost and completion date will be unaffected.

3 The Engineer will only consider shop drawing bearing the stamp of the Contractor and all
Subcontractors involved. The Contractor shall check the drawings for all pertinent information
such as physical dimensions, make, performance, electrical characteristics, and shall use
reference symbols or enumeration to correspond to the design drawings.

4 The Contractor shall assume responsibility for the accuracy of equipment dimensions related
to space available, accessibility for maintenance and service and compliance with inspection
authority codes. Shop Drawings shall indicate the shipping and working weights of all
equipment.

5 The submission of samples will be subject to the same procedure as those of shop drawings.
The materials for which samples are to be submitted shall include, but may not be limited to
conduits and accessories, wiring accessories, distribution boards, cables and wires, fire
alarm accessories, speakers, light fittings, sanitary fixtures and fittings, valves, Instruments,
thermostats, Insulation and grilles and diffusers. One set of such samples shall be required
to be brought to site and kept there after approval until substantial completion.

6 The Engineer shall mark the drawings “re-submit specified item”, “rejected”, “no exception
taken”, or “make correction noted”. In the last case, all revisions will be clearly marked on the
returned print and corrected prints may be issued for manufacture and construction. The
Contractor shall make the revisions shown on the “make corrections as noted” prints onto the
drawings as soon as practicable and forward copies to the Engineer for his records. This
must be done within one month. Failure to re-submit in this time will cause the drawings to be
treated as “revise and re-submit” and the contractor will be responsible for any delays so
caused.

7 The Engineer is not responsible for any delays caused by the inadequacy of the Contractor’s
drawings or his failure to obtain initial or subsequent approval. Any time taken by the
Contractor to obtain approval after the originally scheduled date will be considered as a delay
to the contract caused by the Contractor.

8 When drawings are marked “re-submit specified item”, the Contractor is to re-submit the item
as originally specified or as may be determined to be equivalent by the Engineer. The
Engineer is the sole arbiter of whether any item is satisfactory or equivalent.

9 When drawings are marked “rejected” a complete re-submission of the particular drawing is
necessary, subject to the same conditions as outlined above.

10 The Engineer’s review shall not relieve the Contractor from responsibility for deviations from
the Project Documentation, unless he has, in writing, called the Engineer’s attention to such
deviations at the time of submission of drawings. The Engineer’s review shall be construed to

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apply to, and only to, general arrangements and shall not relieve the Contractor from the
entire responsibility. Any approval by the Engineer shall be on the understanding that any
item submitted shall be ordered with options and modifications to fully meet the requirements
of the Project Documentation. Any fabrication, erection, setting out or other work done in
advance of receipt of stamped drawings shall be done entirely at the Contractor’s risk and
cost.

11 The Contractor shall furnish prints of the reviewed details to all other parties who may require
them for proper co-ordination of their work, and furnish all information necessary for the work
as a whole.

12 The Contractor shall obtain manufacturer’s installation directions to aid in the proper
execution of the work. Two copies of such directions shall be submitted to the Engineer prior
to installation, for use in inspecting the work.

13 One complete set of checked shop drawings shall be bound into each operating and
maintenance manual.

1.1.23 Record Drawings

1 As the job progresses, the Contractor shall mark on one set of prints to accurately indicate
the status of installed work. The white prints shall be available for inspection at the site at all
times, and be presented for scrutiny at all progress meetings. All information shall be
transferred onto the set of transparencies. One set of transparencies and five sets of white
prints shall be submitted to the Engineer for onward transmission to the Owner.

2 The record drawings shall show the installed inverts of all services entering and leaving the
building and the property. Underground services shall be dimensioned at key points of every
run in relation to the structure and building. Record all elevations for underground services
shall be recorded in relation to floor level of the building and give reference datums to
Municipality benchmarks.

3 The exact locations of all services left for future work shall be indicated. All embedded work
shall be shown and dimensioned in the structure.

1.1.24 Storage of Materials and Equipment

1 The Contractor shall protect all mechanical and electrical works from damage and shall keep
all equipment dry and clean at all times.

2 All openings in equipment and materials shall be covered. all temporary openings in ducts
and pipes with polyethylene sheets or caps shall be covered until the final connection is
made. The quality of such cover must be determined with due regard to how long it may be
until final connection.

3 The Contractor shall be responsible for and make good any damages caused directly or
indirectly to any walls, floors, ceilings, woodwork, brickwork, finishes, services, roads,
gardens etc.

1.1.25 Inspection of Material Prior to Installation

1 The following shall be inspected prior to Installation:

(a) pumps and fans shall be inspected to ensure there is no damage to the
casings impellers or drives

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(b) pipework and ductwork shall be checked for any obstructions or dirt
(c) valves dampers set shall be checked for damage and proper operation
(d) all material shall be inspected to ensure that it is an approved item.

1.1.26 Inspection, Testing and Adjusting

1 All the works provided as part of this Contract shall be inspected and commissioned in
accordance with all relevant British Standards and to the entire satisfaction of the Engineer.

2 The electrical/mechanical subcontractor shall employ the services of a specialist testing and
commissioning company approved by the Engineer. The specialist company should be
regularly engaged in providing a testing and commissioning service and have been in
continuous business for not less than seven (7) years. The company shall employ fully
trained staff having not less than three (3) years dedicated experience. A senior experienced
commissioning engineer with minimum dedicated experience of seven (7) years shall be
responsible for supervising and directing the activities for the testing and commissioning
team.

3 The Contractor shall carry out all tests specified any other tests required by the Engineer.
Equipment shall be tested to the requirements of, and where necessary, in the presence of
the manufacturer and the Engineer.

4 The Contractor shall provide all equipment, labour, instruments, loading devices, incidentals,
and pay for all fuel, power and sundries required to carry out the tests.

5 All installations shall be inspected and tested in sections as the work proceeds and on
completion as composite systems and it shall be noted that the Engineer or any of the other
relevant Authorities may require to inspect or test any equipment during manufacture at the
manufacturer’s works. All necessary arrangements shall be made as part of this Contract.
This will generally not apply to specified items unless specifically noted in the Project
Documentation, but may be necessary for alternate equipment, should this be considered at
all.

6 All tests shall be arranged in co-operation with the Engineer and all other concerned parties
and shall be subject to at least five (5) days notice in writing of the time, location and nature
of the test to be performed. Not test shall be considered valid unless the Engineer is present.

7 All necessary skilled and unskilled labour shall be provided for attendance during the tests
(including pre-and post-test activities) and the test media shall be provided and subsequently
disposed of except where specifically stated otherwise.

8 The testing and adjusting is the contractual responsibility of the Contractor but actual
performance of the tests is expected to the sole responsibility of an approved subcontractor.

9 The Contractor shall have all testing and balancing performed only by persons who are
thoroughly versed in this type of testing and balancing and with proven ability. Names,
complete with experience records, and references shall be submitted for the approval of the
Engineer.

10 Any defects occurring at any time during the test duration shall be made good and a
complete re-test shall be carried out, at no additional cost to the Contract.

11 Where failure occurs during a test, inspection or commissioning procedure which results in
damage to the building fabric and/or any services not provides as part of this Contract, or
requires subsequent builder’s work to be carried out, this work shall be performed to the
entire satisfaction of the Engineer at no additional cost to the Contract.

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12 All the test points shall be provided which are necessary to carry out the specified tests and
commissioning procedures including facilities for measuring or monitoring temperature,
pressure, pressure drop, volume flow, in-duct sound power or sound pressure, humidity, or
other relevant conditions in both air side and water side systems. Such points shall be fitted
with removable plugs, flanges, or other appropriate and approved devices.

13 Prepare test report forms for each test to be performed and submit these to the Engineer at
least two weeks prior to the commencement of any tests.

14 Only after the system installation has been completed and the system has been put into
continuous operation shall testing be carried out. The testing, adjusting, and balancing shall
be performed when outside conditions are commensurate with the design conditions for the
given system. Dummy loads shall be added to the system if outside conditions are less
severe than the specified points.

15 The Contractor shall prepare a complete list of instruments for each test containing for each
instrument.

(a) name of instrument manufacturer

(b) scale and full scale accuracy
(c) date of last calibration test
(d) name of last calibrating company.

16 All instruments and consumable, such as recording paper, necessary for conducing the tests
shall be provided, including but not limited to the following:-

(a) electronic anemometer

(b) inclined tube manometer or micromanometer
(c) pitot tubes of various lengths
(d) digital thermometers
(e) weekly recording thermometers
(f) weekly recording relative humidity meter
(g) anemometer for diffusers, with collector
(h) ammeter, voltmeter, wattmeter
(i) power factor meter
(j) insulation tester
(k) earth loop impedance tester
(l) tachometer

17 Duplicate signed test certificates shall be provided after each test which will be countersigned
by the attending Engineer. The test certificate shall give the following particulars:

(a) apparatus or section under test

(b) maker’s number (if any)
(c) nature, duration and conditions of test
(d) result of test

No test shall be valid until the test certificate is provided.

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18 Duplicate copies of test certificates carried out at manufacturer’s works shall be forwarded to
the Engineer for approval prior to despatch of the article to site.
19 No section of the Works shall be insulated or in any other way concealed prior to testing and
inspection and subsequent concealment where applicable shall only take place following
written authority from the Engineer.

1.1.27 Testing

1 All necessary facilities, measuring and recording instruments including test pumps and
gauges for inspection, testing and commissioning requirements shall be provided and shall
be checked or calibrated as necessary before use.

2 The Engineer reserves the right to call for a demonstration of the accuracy of any
instruments provided.

3 All representatives present during inspection, testing and commissioning shall be fully
conversant with the system concerned and the method of system and instrument operation.

4 Manufacturer’s of specialist subcontractors’ representatives shall attend where specifically

indicated elsewhere in the Project Documentation or where necessary to ensure full service
and co-operation is available to the Engineer to enable the Works to be tested and
commissioned in accordance with the requirements of the Project Documentation.

5 All necessary precautions shall be taken to safeguard structures and existing equipment
against damage during inspection, testing or commissioning. Any damage so caused shall be
made good at no cost to the Contract.

6 All tests shall last for the minimum time period stated or longer if necessary to ensure all
sections have been fully examined as required by the test.

1.1.28 Instructions for Operation and Routine Maintenance

1 The Contractor shall provide instruction to the Owner’s staff on how to make minor
adjustments, carry out necessary maintenance and how to operate each system.

2 For new equipment, the Contractor shall provide the Engineer with three copies of complete
operating and maintenance instruction for equipment at the time of delivery of the equipment.

3 Equipment shall be rejected unless accompanies by instructions. Such documents must be

received al least one month prior to the completion date of the relative section of the Works.

4 Instructions shall be bound in a suitable loose leaf booklet or binder, and shall include prints
of the following drawings:

(a) list of all equipment installed

(b) general layout
(c) wiring diagram of control panels
(d) non-dimensional layout, showing location of all electrical devices

1 The contractor is to operate a draft for discussion with the Engineer prior to finalising the
documents.

5 Portable tools and spare parts shall be correctly labelled and handed over to the Engineer.

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6 The section dealing with complete systems shall be subdivided into each service with a ready
means of reference and detailed index. The function and manner of operation of each
system shall be clearly described together with illustrations and line diagrams in schematic
form showing the location and function of control valves, items of equipment and spaces or
areas which are service by these items. The colour coding and identification systems
employed shall be explained.

1.1.29 Maintenance

1 Maintenance is defined as the Contractual Liability to maintain the equipment in working

condition, plus the regular checks and servicing of equipment during the maintenance period
to keep the equipment in best working order.

2 Regular maintenance shall be as necessary, but in any event not less frequently than
monthly.

3 In the even that the Owner has his own staff, the Contractor is still to check monthly and
advise on any problems and is still to assume responsibility. The Owner is to ensure that his
staff do nothing to adversely affect the Contractual maintenance.

1.1.30 Warranty

1 All Warrantees for equipment suppliers will be vested in the Owner regardless of whether the
Contractor who supplied the equipment is still associated with the Project or not.

2 Warranty will be full warranty and will include all overhead, profit, incidental charges and
sundries.

3 Where damage is caused to any other item by any failure of the item warranted then the
warranty shall also include the costs incurred in rectifying the damage.

END OF PART

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3 UNITARY EQUIPMENT .............................................................................................................. 2

3.1 GENERAL ................................................................................................................................... 2
3.1.1 SCOPE 2
3.2 AIR-CONDITIONERS ................................................................................................................. 2
3.2.1 Split Type Room Air-conditioners 2

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3 UNITARY EQUIPMENT

3.1 GENERAL

3.1.1 SCOPE

1 This Part details the requirements for all types of unitary equipment as specified in the
Contract.

2 Related Sections are as follows:

Section 1 General
Section 21 Electrical Installation

3.2 AIR-CONDITIONERS

3.2.1 Split Type Room Air-conditioners

1 The unit offered in the tender shall be by a reputed manufacturer who is represented locally
and can provide an efficient maintenance and spare part service.

2 The casing shall consist of a heavy gauge steel chassis with sheet metal casing. The
minimum thickness shall be 1.2 mm. The whole unit shall be protected against corrosion and
finished inside and outside with stoned primer and paint.

3 The casing for the inside unit shall be the same as mentioned above or of rigid plastic as
supplied by the manufacturer.

4 The fan shall be of the forward curved centrifugal type and be made of aluminium reinforced
glass fibre or rigid plastic material.

5 The air filters shall be of nylon fibre glass fibre material or as supplied by the manufacturer
and approved by the Engineer.

6 The filter shall be easily removable for cleaning.

7 The inside unit fan and condenser fan motors shall factory lubricated bearings of the sealed
for life type.
8 The motor winding and electrical components shall be impregnated or protected to avoid
problems with condensation.

9 The compressor in the outside unit shall be the hermetically sealed pattern complete with
resilient mountings.

10 The condenser and evaporator coils shall be formed of copper primary tubes with aluminium
fins or copper fins. If copper fins are used they shall be elctro-tinned after manufacture. The
fins shall be mechanically bonded to the tubes. Aluminium coils shall be guaranteed for five
years.

11 The unit shall have control giving three running speeds and an off position.

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12 The outlet grille shall be fully adjustable to enable the direction of airflow to be set to the
desired direction. Where the units are floor mounted the supply grilles shall be on the top of
the unit.

13 The units shall be installed in accordance with the manufacturer’s recommendations to unit
location, refrigerant piping, power and condensate piping.

14 Where the units are of the concealed type the Contractor shall ensure adequate access is
provided for the removal of a complete unit.

15 The condensate pipe work shall be run to the nearest drain.

16 The units shall meet the specified duties for air flow and cooling capacities.

17 The controls shall include the following:

(a) high-low pressure switches

(b) oil pressure protection switch
(c) thermal overload cut-out.

18 The units shall incorporate the following accessories:

(a) electric crank case heater

(b) suction and discharge shut off valves
(c) changing, relief and purging valves
(d) gauge connections
(e) spring mounts for compressor.

19 The fin spacing for the evaporator and condenser coils shall be in line with the latest
QGEWC regulations.

20 The air conditioning unit shall be capable of handling the cooling loads when operating in
ambient conditions of 50 °C at the medium speed

21 The outdoor unit shall be designed to operate at outdoor ambient temperature of 50 °C.

22 The sound level shall not exceed 45 dBA at low speed and 55 dBA at high speed when
measured at 1 m distance in a room with normal occupancy and furnishing.

23 The safety devices for the compressors shall be as per the

manufacturer’s recommendations.

END OF PART

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6 DUCTWORK AND AIR-SIDE EQUIPMENT ............................................................................ 2

6.1 GENERAL ................................................................................................................................ 2
6.1.1 Scope 2
6.1.2 References 2
6.1.3 Submissions 2
6.2 DUCTWORK ............................................................................................................................ 3
6.2.1 Ductwork Material 3
6.2.2 Ductwork Specification 4
6.2.3 Ductwork General 4
6.2.4 Low Pressure Ductwork 6
6.2.5 Medium Pressure Ductwork 6
6.2.6 High Pressure Ductwork 6
6.2.7 Low Pressure Flexible Ductwork 7
6.2.8 Flexible Connections 7
6.2.9 Access Panels 7
6.3 BALANCING............................................................................................................................. 8
6.3.1 Balancing Dampers 8
6.3.2 Flow Control Dampers 8
6.3.3 Motorised Dampers 8
6.3.4 Backdraft Dampers 9
6.3.5 Splitter Dampers 9
6.3.6 Fire Dampers 10
6.3.7 Smoke Dampers 10
6.4 SILENCERS ........................................................................................................................... 11
6.4.1 General 11
6.5 DIFFUSERS AND REGISTERS ............................................................................................ 11
6.5.1 General 11
6.6 LOUVRES .............................................................................................................................. 13
6.6.1 Outside Louvres 13
6.6.2 Sand Louvre 13

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6 DUCTWORK AND AIR-SIDE EQUIPMENT

6.1 GENERAL

6.1.1 Scope

1 This Part details the requirements for the construction and installation of the ductwork and air
side equipment.

2 Related Sections and Parts are as follows: Section 1 General

6.1.2 References

1 The following standards are referred to in this Part:

BS 476........................Fire tests on building materials and structures
BS 1449 .....................Steel plate, sheet and strip
BS 1470......................Wrought aluminium and aluminium alloys for general engineering
purposes
BS 1474......................Wrought aluminium and aluminium alloys for general engineering
purposes; bars extruded round tubes and sections
BS CP 352..................Mechanical ventilation and air conditioning in buildings

NFPA 90A ..................Installation of Air Conditioning and Ventilating Facilities

NFPA 96.....................Ventilation Control and Fire Protection of Commercial Cooking
Operation

SMACNA ....................Ductwork design and installation

UL 555 S ....................Smoke Dampers

6.1.3 Submissions

1 Technical Submissions. After award, the Contractor shall check design calculations and shall
advise the Engineer of any discrepancies found.

2 The Contractor will also prepare an air balance for supply, return, exhaust, make-up,
exfiltration etc.

3 The Contractor will prepare full shop drawings, including sections, of distribution systems and
equipment.

4 Hardware Submissions. The Contractor will submit catalogue information for all distribution
equipment including, but not limited to:-

(a) ductwork, duct sealants, gaskets and tapes

(b) flexible ductwork

(c) flexible connections
(d) access panels

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(e) balancing dampers

(f) motorised dampers
(g) backdraft dampers
(h) splitter dampers
(i) fire dampers
(j) silencers
(k) vibration isolators
(l) diffusers, grilles and registers
(m) louvres, sand louvres
(n) filters.

5 The Contractor will submit samples for any or all of the above as requested by the Engineer
after receipt of the catalogues.

6 Samples will definitely be required of these items which are exposed, such as diffusers,
grilles, louvres. The samples must be of size, specification and finish as relevant to the
project.

7 Where a country of origin is given, this refers to the head office in the case of international
corporations. However, for each product not manufactured in that country separate approval
must be obtained from the Engineer.

6.2 DUCTWORK

6.2.1 Ductwork Material

1 All ductwork except in laboratories, kitchens and laundry extract systems shall be
manufactured from strip mill, cold reduced sheet, continuously hot dip galvanized in
accordance with BS 2989 grade Z2. Unless specified elsewhere in the Project
Documentation

2 All flanges and stiffeners used in the construction of galvanized mild steel ductwork shall be
galvanized steel section.

3 Where flexible ductwork is used, it shall conform to ductwork of the type manufactured in
accordance with BS 1470 aluminium strip corrugated and spirally wound with double lock
seam.

4 The length of flexible ductwork shall not exceed 2 m per section and shall be supported as
recommended by the manufacturer.

5 Kitchen extract ductwork shall be air and watertight welded construction manufactured from
16 g black steel sheets in accordance with BS 1449, Part 1 Grade CR4 GP. Ductwork shall
be painted on the outside with two coats of heat resistant galvanic paint after manufacture.

6 Laundry extract ductwork shall be air and water tight construction manufactured from
aluminium sheets in accordance with BS 1470.

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7 Laboratory ductwork or systems carrying corrosive gases shall be manufactured of PVC or

FRP. However before installation of such system the QGEWC shall be approached for
written approval.

6.2.2 Ductwork Specification

1 Ductwork fabrication and hanging methods shall be as described in the “Equipment” Volume
of the American Society of Heating, Refrigerating and Air Conditioning Engineers Guide and
Data Book, latest edition, and/or current edition of applicable manuals published by the Sheet
Metal and Air Conditioning Contractors National Association Inc., where methods described
in these volumes are not at variance with the requirements of any authority having
jurisdiction, or do not conflict with methods described hereafter. Ductwork shall not be ship
fabricated until work has been job measured and interference situations co-ordinated.

2 Any Contractor who is very familiar with British Standards may refer to BS CP 352 and DW
144. Any discrepancy will be clarified by the Engineer on request.

3 In any event, the standard of work required is the best available, and the specifications are to
be so interpreted.

6.2.3 Ductwork General

1 All dimensions shall be checked on site before ductwork manufacture is commenced.

2 The whole of the ductwork installation shall be carried out by an approved specialist in
ductwork manufacture and installation. No ductwork shall touch the building structure or
building finishes direct, but shall be isolated with insulating spacer.

3 The fabrication shall be carried out in a neat and workmanlike manner with all ductwork true
in size and cross-section, braced and stiffened as specified and with all internal and external
surfaces free from projections and sharp edges.

4 At each main branch in ductwork and at each fan discharge or suction, provide sufficient
number of Pitot tube holes for balancing systems. Also, provide test holes for traverse fan
discharge and at all equipment. Test holes shall be located within easy reach of catwalks or
ladder. Each test hole shall have 20 mm clear opening, provided with a metal ring place with
a threaded hole in the boss, and matching screwed head plug. Where these plugs are
installed in insulated ductwork, provide an extension collar against which the insulation can
be finished.

5 Reinforced holes shall be provided where thermometers, manometers, thermostats, gauges,

damper rods etc., occur in ductwork. Extended collars shall be provided for the reinforced
holes where these occur on insulated ductwork. Where copper tubing passes through
ductwork, or casing, provide a rubber grommet to prevent damage to copper tubing.

6 Ductwork shall be rigidly suspended or supported from building structure. Expansion type
concrete inserts shall be placed so that the fastener is in shear rather than tension. Powder
actuated fasteners placed by an explosive charge will not be accepted. Angle type trapeze
hangers with rod supports space at 2 m maximum shall be used. “C” type beam clamps will
not be accepted. Provide necessary steel angle iron required for bracing of ductwork or
equipment, and for supporting ductwork from building structure.

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7 A layer of felts strip 12.5 mm compressed thickness shall be provided between any support
member which is designed to clamp or grip the duct (e.g. circular duct band clip) or on which
the duct is to rest. All supports shall be hot dip galvanized.

8 Increase in duct size shall be gradual. Where width or largest dimension of a duct is over
450 mm, duct shall be stiffened by bending in a break across corners in both directions.
Ducts shall be self-supporting and complete in themselves. Single thickness partition
between ducts will not be accepted. Visible internal portions of duct outlets to grilles and
registers shall be painted in dull black.

9 All necessary allowances and provisions shall be made in the installation of the ducts for the
structural framing of the building and when changes or offsets are necessary, the required
cross-sectional areas shall be maintained. All of these changes however, shall be approved,
and installed as directed at the time.

10 During installation, the open ends of ducts shall be protected with blank, flanged sheet metal
baffles, securely attached to prevent debris and dirt from entering.

11 Where ducts are shown connecting to masonry openings and/or along the edges of all
plenums at floors, walls, etc., provide a continuous 30 x 30 x 4 mm galvanized angle iron
which shall be bolted to the structure and made airtight to same by applying caulking
compound on the angles before they are drawn down tight. The sheet metal at these
locations shall be bolted to the angle iron framing.

12 All air ducts, casings, plenums etc., shall be constructed of lock forming quality prime
galvanized steel sheets, which are free from blisters, slivers, pits, imperfectly coated spots
etc. No second quality sheet metal allowed.

13 Where damage (or rusting) has occurred on galvanized ductwork, the affected section shall
be made good by painting with two coats of zinc-rich paint and approved finishing paint, or
where the damage in the Engineer‟s opinion cannot be made good, then a new section of
ductwork shall be provided at no cost to the contract.

14 Duct shall be constructed using double or Pittsburgh lock corner seams. All seams shall be
hammered down and made airtight by applying sealant before hammering down. For
transverse joints, refer to the current ASHRAE guide for low pressure ductwork.

15 Support the vertical ducts installed in the various shafts at each floor level with galvanized
supporting irons of approved size.

16 Install these angles across the width of the shaft, with their ends attached to angle irons
securely anchored into the masonry walls of the shaft, or attached to the framing of the floor
openings. The ducts shall be bolted to these supporting angle irons.

17 Ensure that all openings required through floors, walls, partitions etc., for the duct system are
provide in the exact location required.
18 Each piece of ductwork shall be wiped inside and out before installation and all open ends
shall be capped and sealed to prevent entrance of dirt during construction. Ensure that
ductwork systems are clean and free from dirt, dust, grime, debris etc., before initial
operation of fans. Fans shall not be operated until the filters are installed and approved from
the Engineer has been obtained.

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19 The bottom joint and 150 mm of vertical joint on outside air intake ducts and mixing chamber
ducts shall be soldered and made watertight. Provide drain connection and run copper drain
pipe to nearest floor drain.

20 All fixing devices including nuts, bolts, washers etc., used in the construction or support of
galvanized ductwork shall be sheradised, or cadmium-plated.

21 Final connections to diffusers shall be carried out using flexible ductwork or solid spigots as
detailed in the Project Documentation.

22 Sealants, gaskets and tapes shall comply with DW 144 Part 7 section 27 or DW 151 section
12 as appropriate.

6.2.4 Low Pressure Ductwork

1 This applies to ductwork with mean velocities less than 10 m/s and static pressures of 500
Pa or less.

2 Rectangular low pressure ductwork shall be fabricated from prime quality, re-squared, tight
coat galvanized steel sheets as specified in the relevant standard.

3 Reinforcing and joints shall be in accordance with ASHRAE Guide and Data Book,
Equipment Volume, 1988 Chapter 1 or in accordance with DW 144.

4 Low pressure suction and discharge plenum chambers shall be fabricated from 1.3 mm
galvanized steel with galvanized angle iron framework and bracing.

5 In square elbows and in elbows where the radius is less than 1.5 times the width of duct,
sheet metal deflector vanes shall be installed the full height of the duct, being securely riveted
in place. All vanes shall be double thickness vanes of two gauges heavier than the duct in
which they are installed, and shall be factory made, not site fabricated. Vanes shall be tack
welded to vane rail. For vane lengths over 1000 mm, tack weld vanes to 10 mm tie-rod at
mid-span.

6.2.5 Medium Pressure Ductwork

1 This clause applies to ductwork subject to pressures up to 1000 Pa.

2 Rectangular medium pressure ductwork shall be fabricated from prime quality, re-squared
tight coated galvanized steel sheet as specified in the DW 144.

3 Reinforcement and joints shall be as detailed in DW 144.

6.2.6 High Pressure Ductwork

1 This applies to ductwork subject to pressures up to 2000 and 25000 Pa.

2 Rectangular medium pressure ductwork shall be fabricated from prime quality, re-squared
tight coated galvanized steel sheet as specified in the relevant standard.

3 Reinforcement and joints shall be as detailed in the DW 144.

4 All high pressure ductwork shall be pressure tested in accordance with the DW 144.

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6.2.7 Low Pressure Flexible Ductwork

1 Flexible ductwork shall be manufactured with a two ply aluminium inner core, surrounded by
3
25 mm thickness of 24 kg/m density fibre glass, all wrapped in a reinforced aluminium outer
jacket. Ductwork shall meet the standards of NFPA 90A, and be UL listed or to meet BS 476
and BS 413.

2 Flexible ducts installed in an externally insulated duct system shall be factory insulated with
3
glass fibre insulation not less than 25 mm thick and a density not less than 24 kg/m , re-
covered with an acceptable vapour seal.

3 Flexible ducts installed in internally (acoustic) insulated duct system, shall be factory
insulated with glass fibre insulation not less than 20 mm thick and a density not less than 24
3
kg/m , faced on air side with PVC coated glass cloth having an open area not more than 25
%, and on room side with material specified above.

4 Flexible duct installation shall be in accordance with manufacture‟s instruction. Joints

between factory insulated flexible ducts and field insulated ductwork shall be sealed and
taped under this section.

5 Pre-insulated flexible ducts shall be subject to QGEWC approval.

6.2.8 Flexible Connections

1 Flexible connectors at inlet and discharge to air handling equipment shall be pre-assembled
0.7 mm galvanized steel with minimum of 100 mm width (exposed) fabric. For higher
pressure applications 25 mm of width of fabric shall be used for each 25 mm of static
pressure.

2 Flexible connectors attached to acoustically treated ductwork shall be insulated with 25 mm

Fibre glass insulation packed between flexible connector and 16 gauge (1.5 mm) galvanized
steel housing. Housing shall be fastened to duct with sheet metal screws. At equipment collar
caulk between collar and flange on housing with 10 mm thick permanently flexible sealant.
Care shall be taken to ensure that ducts on both sides of the connection are independently
supported and that no “bridging” occurs.

3 All flexible connection will be an approved manufacturer, with ratings of fire spread, strength
etc., listed by a recognised Testing Authority.

4 The fabric shall be rated for use up to 93 ºC working temperature with a tensile strength of
not less than 690 kPa.

5 The material shall also be impervious to moisture, dimensionally stable, and shall not rot.

6.2.9 Access Panels

1 Duct access doors shall be minimum 450 x 300 mm. All access panels shall be constructed
from double thickness galvanized steel sheets, thickness to suit the duct insulation with
necessary reinforcing inside for rigidity with space filled with glass fibre insulation. Panels
shall be made airtight with a continuous neoprene rubber gasket.

2 Openings in ductwork shall be provided with continuous galvanized reinforcing bars, which on
insulated ductwork, shall be extended to the face of the insulation. Small panels shall be
provided with at least two brass window sash fasteners. All panels shall have brass drawer
type handle.

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3 Apparatus access doors shall be minimum 600 x 1500 mm with angle or channel frame.
Provide two 75 mm strap hinges with brass pins; and two handles minimum, operate from
inside and outside.

4 Provide access panels where shown, required and directed and in the following locations:

(a) bottom of all duct risers

(b) next to outside intakes and outlets
(c) at each fire damper
(d) into apparatus casings to facilitate maintenance and cleaning of all components

5 The duct access doors shall be fitted with CAM type to locks spaced to minimise leakage and
drawer type handles.

6.3 BALANCING

6.3.1 Balancing Dampers

1 Install volume dampers in accessible locations at all branch connections and wherever
necessary to adjust the flow of air to secure correct distribution. They shall be made of
galvanized sheet metal, and be equipped with an approved device for fastening in any
desired position. This device shall be such that the damper cannot move or rattle and pointer
shall indicate the position of the damper from the outside of the finished duct insulation and
shall be clearly marked with words „Open and Shut‟.

2 Dampers shall be multi-leaf opposed blade with blade height not more than 1.80 mm. PVC
or similar blade seals shall be incorporated to the end of all blades. The blades shall be of an
aerofoil design.

3 All blades shall be operated by a single operating quadrant with gears and links as
necessary.

4 Spindles shall be non-corrodible, passing through non-ferrous bushings or ball bearing

supports with seals.

5 The whole damper assembly shall be mounted in a galvanized frame with flanges.

6 Seal material shall be rated up to 93°C with low water absorption and excellent chemical
resistance to acids, alkalis and oils.

6.3.2 Flow Control Dampers

1 These dampers shall be installed in ductwork to maintain a constant air flow regardless of
changes of pressure conditions. The damper shall be suitable for duct velocities ranging
between 2 m/s to 8 m/s and shall operate from a minimum pressure of 20 Pa up to a
maximum of 200 Pa. These dampers shall be installed in branch ducts fitted with high
efficiency particle (HEPA) filters.

6.3.3 Motorised Dampers

1 The Contractor shall furnish and install, control dampers as required for the proper
functioning of the system.

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2 All control dampers shall he opposed blade.

3 Dampers frames shall be formed channels of not less than 1.8 mm galvanized steel with
mounting holes for enclosed duct mounting.

4 Damper blades shall be of not less than 1.5 mm form galvanized steel. Blades on multi-
blade dampers shall not exceed 200 mm in width and 1200 mm in length. Blade shaft
bearings shall be provided at the ends of each blade. Blade side edges shall seal off against
spring stainless steel seals.

5 Dampers shall be supplied in standard sizes, in 50 mm even increments, with transition as

necessary to mating duct sections.

6 Dampers shall be suitable for operation within the temperature limit of – 40 °C to 93 °C.
Horizontal dampers shall have a rated face velocity of 2 m/s at 1500 Pa static pressure
differential.

7 Dampers used for shut off function shall be of the low leakage type.

8 Damper blades shall have neoprene or PVC edging on all outside air dampers.

6.3.4 Backdraft Dampers

1 Backdraft dampers shall be low leakage with parallel blades and neoprene edge seals.

2 Damper frames shall be constructed from galvanized sheet steel with aluminium blades.
Bearing shafts shall be stainless steel, in brass bearings.

3 All blades shall be coupled at the blade centres and shall be in width of not more than 1000
mm, with maximum blade size of 200 mm.

3 2
4 Leakage shall not exceed 10 m /h per m at 1000 Pa pressure differential.

5 Pressure relief dampers shall be multi-parallel blade with weighted arm closing assist. The
frame shall be anodised aluminium channel sections with formed aluminium blades.
Maximum blade length shall be 100 mm, and polyester foam seating strips shall be
incorporated on blade edges. Bearing shall be in PVC with non-corrodible shafts.

6.3.5 Splitter Dampers

1 In each low pressure system take off where opposed blade duct dampers are not specified,
splitter dampers shall be provided. The only justification for not providing splitters is in a
system which can be demonstrated to be sized by a static regain programme and which is
run in high pressure fittings. Otherwise splitter dampens shall be installed at all take offs.

2 Splitters shall consist of hollow blades in a vane rail assembly, made from galvanized steel by
a recognised manufacturer.

3 A lockable quadrant adjustment level shall be located outside the insulation, and marked
clearly to show vane position.

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6.3.6 Fire Dampers

1 Provide, where required by ordinances or codes, for dampers made to BS 476 or North
American Standards or NFPA 90A, and complete with angle iron frame of 3 mm thickness,
70 °C fusible link, pivot rods, and spring catches. Fire damper housings shall be galvanized
steel duct sections around the fire dampers, and shall allow 100% unrestricted duct area
while in the open position. Provide approved type access doors, with airtight gaskets, for
inspection and servicing of fire dampers. Fire dampers shall be 2 hour rated and shall be
labelled by manufacturer. The fire damper blades shall be out of the air stream.

2
2 Provide fire dampers in all duct over 125 cm in area, in the following locations, whether or
not specifically required by ordinances and codes and as indicated the contract drawing:-

(a) duct entering and leaving fire shafts (duct shafts)

(b) ducts passing through designated fire walls
(c) ducts through floors, and not encased in fire shaft
(d) ducts leaving and entering plant area
(e) ducts entering and leaving storage areas.

3 Where fire dampers are located remote from fire partition, duct between fire damper and
partition shall be encased in double metal lathe and plaster or other fireproofing acceptable to
Authorities having jurisdiction. This shall be arranged and paid for by this trade.

4 Dampers shall be operated by two stainless steel springs with the blades being held in the
open position by a fusible link and stranded stainless steel strap. Blades shall be made from
galvanized steel.

5 Fire dampers shall not be installed in kitchen exhaust ductwork. This shall comply in all
respects with NFPA 96.

6.3.7 Smoke Dampers

1 Smoke dampers shall be the low leakage type, rated under UL 555 S as leakage Class I.

2 Frame shall be of formed channel of not less than 1.6 mm galvanized steel. Blades shall be
1.6 mm, airfoil shaped, double skin construction, opposed blade type.

3 Blade edge seals shall be silicon rubber and jamb seal shall be flexible metal compression
type.
4 Bearings shall be stainless steel sleeve type pressed into frame.

5 Damper actuators shall be factory furnished suitable for either 240 volt or 24 volt application.
Complete unit shall be factory tested in compliance with UL 555 S.

6 Damper and actuator shall be qualified under UL 555 S to an elevated temperature 120 ºC.

7 The damper unit shall be supplied with a two position indicator switch linked directly to the
damper to provide the capability of remotely indicating damper blade position.

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6.4 SILENCERS

6.4.1 General

1 Silencers shall be installed when required to achieve the specified noise levels.

2 At shop drawing stage, the contractor will undertake calculation for every unit and every area
and determine the insertion loss required to meet the stated noise criterion.

3 Supply and return duct noise must be considered as well as duct breakout noise.

4 Materials of construction shall be galvanized sheet metal and mineral fibre acoustic fill which
is inorganic, inert, moisture and vermin resistant. Silencers shall be so constructed as to
prevent erosion and pregnability of the acoustic fill.

5 The silencers shall incorporate a removable panel which provides complete access to all
internal surfaces for cleaning and also permits removal and replacement of acoustic fill.

6 Silencers shall be factory made, and shall have available certified test data concerning
insertion loss. This must be available when required, in advance of ordering units. Where a
silencers is made under licence, or part assembled locally, then tests must also be made
after assembly and witnessed by and independent authority.

7 The static pressure loss of any required silencer must be considered in air handling
equipment original selection.

8 Silencers shall be installed in locations as indicated on the contract drawings.

9 Silencers shall be flanged to exactly match the adjacent ductwork in which they are to be
installed.

6.5 DIFFUSERS AND REGISTERS

6.5.1 General

1 Diffusers, registers and grilles shall be arranged for flush mounting in lay-in type ceilings and
over lap mounting in plaster, mineral tile and similar ceilings, with concealed fixings unless
otherwise directed

2 Grilles, register and diffuser locations shall be adjusted to suit reflected ceiling drawings, or
Engineer's site instructions. All grilles, registers, diffusers, louvres shall be from one
manufacturer.

3 Provide plaster frame for grilles, and diffusers installed in plaster ceilings,

4 All diffusers, grilles and registers shall be supplied completely factory powder coated. Finish
colour shall be to the approval of the Architect. The interior of all grilles and diffusers is to be
factory painted matt black.

5 All supply grilles and diffusers will have opposed blade balancing dampers. All will have foam
rubber sealing band around the edge to seal to the structure. All pivots will be round section,
not of formed sheet, and not relying on a spring steel locking wire.

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6 Basic grilles and diffuser materials shall be aluminium extruded sections. Sections in the air
stream shall be carefully selected to minimise turbulence.

7 All grilles and diffusers supplied on this project shall be tested and rated in accordance with
ASHRAE Standard 70-72, ADC Test Code 1062-GRD and ISO 3741 or have ARI
certification.

8 Linear bar grilles shall be fabricated from aluminium, with 6.4 mm wide bars on 12.5 mm
centres pressed into a notched steel retaining bar. The core can be either welded into the
cuter frame, or where the grille is used in a sill application, held in the outer frame by spring
clips fixed to the core retaining bar. The outer frame shall be 35 mm deep and shall have a
visible flange 25.4 mm wide, milled end caps shall be welded to give a near invisible joint.
The grill shall be complete with an opposed blade damper painted matt black, and shall be
fixed with universal mounting brackets. Both the damper and the fixing brackets shall be
accessible through the face of the grille. Continuous grilles shall be provided with positive
alignment strips, which fit into special keyways extruded into the frame of the grille to ensure
clean unbroken lines.

9 Ceiling Diffusers shall be multi-core giving 4 way horizontal discharge. The three centre cores
of the diffuser shall be manufactured from pressed aluminium, with the remaining cores and
the outer frame fabricated from extruded aluminium welded at the corners to give near
invisible joints. One, two and three way pattern cores shall be used as indicated on
schedules. All cores shall be interchangeable. The core shall be removable without the use of
special tools, but for safety, shall be fixed to the outer frame by a small length of chain. The
diffuser shall be complete with an opposed blade damper painted matt black." The damper
shall be adjustable through the face of the diffuser".

10 Wall registers shall be double deflection fabricated from aluminium, the front vanes being
horizontal, the rear vanes vertical. This grille shall be complete with an opposed blade
damper painted matt black and adjustable from the face of the diffuser. Both sets of vanes
shall be fully adjustable without the use of special tools.

11 Eggcrate return or extract grille shall be provided with 12.7 mm x 12.7 mm openings, giving a
free area of 90 %. The core shall be fixed into an extruded aluminium frame, with welded
corners and a 25 mm face flange. The grille is complete with an opposed blade damper
painted matt black and adjustable through the face of the diffuser.

12 Circular ceiling diffuser shall be of aluminium construction with two concentric inner
spinnings. The diffuser core shall be fully adjustable for vertical or horizontal air discharge,
and shall be removable without the use of special tools. An iris damper shall be provided in
the neck of the diffuser which is adjustable from the diffuser face.

13 Vision proof door transfer grilles shall consist of an aluminium core with inverted-vee type
blades, and an extruded aluminium frame with matching rear flange. The frame shall be
adjustable from 28 mm to 60 mm to suit the door width. Transfer grilles for 'LIGHT TIGHT'
applications such as dark rooms shall be with two vision proof cores back to back.

14 Linear slot diffusers shall provide an unobtrusive continuous air diffusion with a pleasing
aesthetic appearance. Hairline butt joints shall ensure clean unbroken linear runs for active
and dummy sections. The diffusers shall be complete with pattern control blades, fully
adjustable from face of diffuser through 180 degrees and shall be fitted with end caps at each

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end. The diffuser members shall be constructed from high quality aluminium extrusions to
BS 1474 while the pattern control blades shall be of black rigid PVC or aluminium extrusions.

6.6 LOUVRES

6.6.1 Outside Louvres

1 Outside louvres shall be supplied with sleeves for the appropriate openings, and with full
installation instructions.

2 Louvres shall be extruded aluminium frame with aluminium blades of not less than 2 mm
thickness, and shall be firmly fixed so as not to vibrate. Unsupported blade width shall not
exceed 1800 mm.

3 Behind each louvre shall be an insect mesh screen 6 x 6 mm made from 2 mm diameter
wire. The screen will be clamped by a 20 mm frame and will be firmly fixed to the outer
edges of the louvre. The screen and frame shall be hot dip galvanized after fabrication.

4 The connection to the louvre shall be flexible and shall ensure no duct load is transmitted to
the louvre.

5 Louvres shall be provided with powder coated finish to the approval of the Architect.

6.6.2 Sand Louvre

1 Sand louvres shall have a double deflection inlet passage to separate sand from incoming air
by means of centrifugal forces.

2 Separation efficiency shall not be less than 80 % on 20 to 200 micron test dust, and 50 % on
1 to 70 micron test dust.

3 Sand louvre shall be mill finished aluminium sections with casing 2 mm thick and blades 1.5
mm thick. The base of the louvre shall have self-emptying sand holes.

4 Pressure drop at 2 m/s average face velocity shall not exceed 85 Pa.

5 Insect mesh shall be included.

6 Sand louvres shall be provided with powder coated finish to the approval of the Engineer.

END OF PART

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7 THERMAL INSULATION ......................................................................................................... 2

7.1 GENERAL ................................................................................................................................ 2
7.1.1 Scope of Work 2
7.1.2 References 2
7.1.3 Submissions 2
7.1.4 Contractor’s Responsibility 2
7.1.5 System Description 3

7.2 PIPE INSULATION .................................................................................................................. 5

7.2.1 Fibreglass Insulation 5
7.2.2 Polyisocyanurate (Phenolic Foam) Insulation 6
7.2.3 Preinsulated Under Ground 6

7.3 CONCEALED COLD AIR DUCTS ........................................................................................... 7

7.3.1 Fibreglass Insulation 7
7.3.2 Polyisocyanurate (Phenolic Foam) Insulation 7

7.4 EXPOSED COLD AIR DUCTS ................................................................................................ 7

7.4.1 Fibreglass Insulation 7
7.4.2 Polyisocyanurate (Phenolic Foam) Insulation 8
7.4.3 External Ductwork 8
7.4.4 Acoustic Lining 8
7.4.5 Circular Duct Insulation 9

7.5 EQUIPMENT INSULATION ..................................................................................................... 9

7.5.1 Refrigerant and Condensate Drain Pipe Insulation 9
7.5.2 Apparatus Casings 10

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7 THERMAL INSULATION

7.1 GENERAL

7.1.1 Scope of Work

1 This Part details the requirements for insulation for piping systems, ductwork systems, and
equipment.

2 Related Sections and Parts are as follows: This Section

Part 5 Chilled Water Pipework

Section 1 General
7.1.2 References

1 The following standards are referred to in this Part

ANSI 331.1 .................Pipework Design

ASTM E-84.................Test Method for Surface Burning Characteristics of Building Materials

BS 476........................Fire tests on building materials and structures

BS 4735......................Laboratory method of test for assessment of horizontal burning
characteristics of specimens no larger than 150 mm x 50 mm x 13 mm
(nominal) of cellular plastics and cellular rubber materials when
subjected to a small frame

DW 144 ......................Ductwork Installation

7.1.3 Submissions

1 The Contractor shall submit manufacturer’s specifications and installation instructions for
each type of mechanical insulation. The submittal shall include a schedule showing
manufacturer’s product number, thickness and recommended furnished accessories for each
system requiring insulation.

2 Samples for each type of insulation shall be provided. A 300 mm long sample of each piping
insulation type and a 300 x 300 mm of each duct and equipment insulation type.

3 The Contractor shall submit certification and data necessary to show compliance with the
specification and other governing regulations. These shall include proof of compliance for
test of products for fire rating, corrosive resistance and compressive strength.

4 Where the specification calls for additional treatments such as wrapping and water proofing a
complete sample shall be provided in addition to the above samples.

5 All samples shall be retained on site after approval to be a reference for future work.

7.1.4 Contractor’s Responsibility

1 The Contractor shall provide all necessary materials, labour, equipment, tools, appliances,
services hoisting scaffolding supports and supervision to provide complete mechanical
insulation in accordance with the Specifications.

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7.1.5 System Description

1 The thermal insulation shall be in accordance with the QGEWC regulations unless specified
differently in the Project Documentation. However QGEWC approval is required before any
change will be permitted.

2 The whole of the insulation work shall be carried out by an approved specialist insulation
Contractor. All allowances shall be included for arranging a specialist subcontractor
accordingly and for informing the specialist subcontractor of all conditions relating to the
contract and for co-ordinating his works with the remainder of the Works.

3 All allowances shall be included for informing the specialist subcontractor of all details of the
building structure, programme arrangements, and other relevant details at the time of tender
and for all necessary visits to site by the subcontractor or his workers.

4 In addition to complying with the relevant standards, all insulating material shall be free from
asbestos.

5 Insulating materials shall be acceptable only if they are equal to or better than the grades or
classes of fire resistance as follows:

(a) BS 4735, Class Q, for burning rate nil, and not producing melted droplets
(b) BS 476 Part 4, for non-combustible grade
(c) BS 476 Part 5, Class P, for not easily ignitable
(d) BS 476 Part 7, for fire propagation index of a maximum of 12.6
(e) BS 476 Part 7, Class 1, for surface spread of flame
(f) BS 476 Part 9, for production of emitted smoke shall not give more than 35 %
obstruction of the light beam.

6 All insulation finishes and coverings shall be classified as Class 1 surface spread when
tested in accordance with BS 476, Part 7.

7 All adhesive, mastics, coatings, sealers and primers shall be classified as Class 1 surface
spread when tested in accordance with BS 476, Part 7. They shall not in any way attack the
insulation or the surface to which the insulation is being applied and shall be suitable for the
working temperatures.

8 Insulating materials shall have thermal conductivity values not more than those listed as
given in Table 8.1.

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Table 8.1

Thermal Conductivity Insulating Materials

Material Type Thermal Conductivity

(W/m/°C)

Mineral wool Mineral wool Sectional Slabs 0.04

Fibre Glass Closed Cell All All 0.04
Polyurethane Sectional 0.034
Styrofoam Rigid 0.038
0.025
0.026

o
Note: all conductivity figures are rated at an average temperature of 24 C.

9 All material delivered to site shall be new and fully dried out and so maintained throughout
the progress of the works. All insulating materials shall be stored in storage sheds, and in
accordance with the manufacturer’s recommendations.

10 In order to ensure that the insulation applied is in all respects in accordance with the
Specification, sections shall, as required by the Engineer, be cut from the finished insulation.
The Contractor is as allow in his price for the removal and replacement of two sections of
each type of insulation. If however, defects are revealed, further sections shall be cut out for
inspection, and all cut-out sections shall be replaced at no cost to the Contract. If further
defects are revealed then the Engineer shall have the right, when in his opinion it is
necessary, to issue instructions for any part or the whole of the insulation to be removed and
replaced. The replacement with new insulation shall be to the satisfaction of the Engineer
and the cutting out and replacement shall be at no cost to the Contract.

11 Particular attention shall be paid to the finished appearances of all thermal insulation which
must present a neat and symmetrical appearance running true in the line with pipe layouts,
etc.

12 Any rough, irregular and badly finished surfaces shall be stripped down and re-insulated to
the Engineer’s satisfaction.

13 In certain cases the type of insulation specified will require a painted finish, in addition to
identifying bands and any signs which are to be applied.

14 All systems are to have been tested and approved by the Engineer prior to installation of
insulation.

15 All thermal insulation shall be non-corrosive to the metal, water repellent and fire retardant.

16 All metal surfaces shall be thoroughly cleaned and treated with approved corrosion inhibitor
before applying the insulation. Insulation can be applied directly to galvanized surfaces.

17 Lead bearing inserts shall be provided at all supports to ensure that the insulation is not
compressed or damaged. The inserts shall be treated hardwood or approved plastic.

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18 The vapour barrier shall be continuous and not punctured at any point.

19 The cotton canvas/fibre glass cloth shall be soaked in a compound as approved by the
Engineer and shall be overlapped at least 50 mm at transverse and longitudinal cloth joints.

20 Vapour seal materials shall be fire resistant, non-toxic, weather resistant, and anti-fungus
quality. Bitumen based products shall not be used.

21 All access doors in ductwork shall be insulated to match the ductwork that they are installed
in. The insulation shall be furnished to allow access without damage to the insulation.

22 Mechanical fasteners shall be used when installing slab or roll insulation. The fasteners shall
be the self adhesive type and only fixed after cleaning to ensure proper adhesion.

7.2 PIPE INSULATION

7.2.1 Fibreglass Insulation

1 Pipe covering and insulation shall be manufactured by a recognised manufacturer, and shall
be neatly installed to the following specifications. The general intent is to provide a sealed
insulation which will not permit sweating of the pipes and which will not retain moisture to the
detriment of it’s insulating capability.

2 Pipes shall be thermally insulated with rigid section of fibre glass insulation with density of 65
kg/m3, having a thermal conductivity factor of 0.03 W/m2/K at 10 oC with self applied
aluminium craft paper. The minimum thickness shall be 500 mm unless otherwise specified
in the Project Documentation.

3 The insulation, in sizes indicated shall be applied over clean, dry surfaces. Adjoining sections
of insulation should be butted firmly together with the longitudinal seam of the jacket located
on the bottom half of the pipe.

4 Pipes should be banded with at least three aluminium bands per section. One at the centre
and one covering the edge of each circumferential strip.

5 Insulate and finish valves and fittings in the same manner and same thickness as piping in
which such items are installed. Moulded, factory shaped sectional pipe covering, factory or
job fabricated may be used subject to satisfactory visual checking by the Engineer.

6 Direct contact between pipe and hanger shall be avoided. Hangers shall pass outside of the
sheet metal protection saddle, which shall cover a section of high density insulation, of
sufficient length to support the pipe without crushing the insulation. The vapour barrier shall
be lapped over the saddle and securely cemented to it. Minimum thickness of metal saddle is
1.5 mm. The method shall be in accordance with DW 144.

7 Internal chilled water pipe shall be covered by 50 mm of rigid insulation plus a 200 g/m2
woven glass cloth cover painted with two coats of approved sealant. External chilled water
pipe shall be covered by 50 mm of rigid insulation plus a waterproof cover of 200 g/m2 woven
glass cloth painted with two coats of approved sealant. Where any insulated piped service is
run external to the building (including insulated pipework run on roofs), in trenches or in plant
rooms, the piped services shall be clad using an outer covering of sheet aluminium with a
minimum thickness of 0.7 mm.

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8 Where exposed, insulated pipework runs through occupied or public areas, chiller yards and
plant rooms the exposed pipework shall be clad with sheet aluminium, of 0.7 mm or thicker.
or may be painted as detailed in the Project Documentation.

9 Strainers and valves of diameter 80 mm and above and fittings which require opening for
maintenance and repairs shall be provided with insulated boxes.

7.2.2 Polyisocyanurate (Phenolic Foam) Insulation

1 Chilled water pipe insulation shall be polyisocaynurate rigid closed cell pre-formed pipe
insulation cut from blocks which have been factory produced from a chemical system
complying with ASTM E-84, with a flame spread less than 25 and identified by a light green
colour.

2 The density shall be 35 kg/m3 for all interior piping and 50 kg/m3 for external pipework.
3 All pipe insulation to be factory covered with reinforced aluminium foil/kraft paper laminate,
the whole providing a Class I rating to BS 476 Part 7.

4 Bends are to be insulated with pre-moulded polyisocyanurate rigid closed cell foam meeting
the same fire ratings as above but with aluminium foil applied separately on site.

5 Tees, valves, strainers etc. are to be produced by the Contractor forming suitable metal
boxes and pouring in-situ polyisocyanurate chemical system supplied by the pipe insulation
manufacturer and in accordance with his instructions.

6 High density pipe supports, 80 kg/m3, are to be produced from the same chemical system
and by the same manufacturer of the insulation and covered with aluminium foil in the
factory.

7 The manufacturer’s installation recommendations shall be strictly adhered to.

8 The use of fibrous insulation on chilled water pipes will not be permitted.

7.2.3 Preinsulated Under Ground

1 All underground chilled water pipework shall be pre-insulated.

2 The system shall be non corrosive, non metallic, structurally strong completely water proof
and entirely resistance to attack by salts, water and all ground chemicals normally
encountered.

3 The system manufacturer shall have fabricated systems of the composition defined here for
at least two years.

4 All straight sections fittings, anchors end seals and other accessories shall be factory
prefabricated to the project dimensions. The design shall be such to minimise the number of
field welds.

5 The system design shall be in conformance with the latest edition of ANSI 331.1.

6 Pipe movement due to thermal expansion shall be accommodated with expansion loops or
elbows.

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7 The system manufacturer shall provide an integrated leak detection/location system factory
installed within the piping system. The leak detection system shall be connected to the leak
detection panel.

8 The complete system shall be computer designed and analysed by the piping system
manufacturer to determine stress and anticipated thermal movement of the pipework.

9 PVC warning tape shall be provided 300 mm above the buried throughout the length of the
buried pipe.

7.3 CONCEALED COLD AIR DUCTS

7.3.1 Fibreglass Insulation

1 Unless otherwise indicated, supply and return ductwork shall be insulated with 48 kg/m3
density aluminium foil faced fibreglass duct insulation. The insulation shall be fastened with
adhesive of high quality and a thermal conductivity of not more than 0.037 W/m/°C. The
adhesive shall be applied to the entire surface of the ductwork and insulation. Butt all joints
tightly and seal all breaks and joints by adhering a 75 mm aluminium foil vapour barrier tape
or sheet with a fire retardant adhesive.

2 Insulate flexible connections and connections to diffusers with 25 mm thick, 24 kg/m3 density
reinforced aluminium foil faced, flame resistant, flexible fibreglass insulation. Overlap onto
adjacent insulation and seal with adhesive duct tape to give good closure.

3 Finish insulation on ductwork by applying a 200 g/m2 canvas cover adhered between two
coats of approved fungicidal protective fire resistant lagging adhesive.

4 Bitumen based products shall not be used.

7.3.2 Polyisocyanurate (Phenolic Foam) Insulation

1 Unless otherwise indicated insulate supply and return ductwork with 25 mm of 35 kg/m3 non-
hygnoscopic foil faced polyisocyanurate (phenolic foam) slabs.

2 Flexible connections shall be insulated with 25 mm of 24 kg/m3 reinforced flame resistant

flexible fibreglass insulation.

3 The insulation shall be fixed by means of a non flamable adhesive recommended by the
insulation manufacturer.

4 Finish insulation on duct work by applying a 200 g/m2 canvas cloth cover adhered between
two coats of approved fungicidal protective fire resistant lagging adhesive.

7.4 EXPOSED COLD AIR DUCTS

7.4.1 Fibreglass Insulation

1 For ducts exposed inside conditioned spaces, insulate as described above for concealed air
ducts but using aluminium foil faced fibre glass boards with density 48 kg/m3. Then apply a
200 g/m2 canvas cover adhered between two coats of approved fungicidal protective fire
resistant lagging adhesive.

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2 Where exposed cold air ductwork runs through occupied or public areas, it shall be clad with
sheet aluminium, 0.9 mm or thicker as specified in the Project Documentation.

3 For ducts exposed in non air conditioned areas and plant rooms, insulate using the method
described for concealed ducts, but using insulation with a minimum thickness of 50 mm, 48
kg/m3 density fibreglass insulation. If necessary due to market availability, this may be
installed in two layers, but with each layers, but with each layer properly finished.

4 Finish insulation by applying a 200 g/m2 canvas cover adhered between two coats of
approved fire resistant lagging adhesive.

5 Where ducts penetrate the building shell, the duct shall be flashed and waterproofed before
any insulation is applied.

7.4.2 Polyisocyanurate (Phenolic Foam) Insulation

1 Exposed ductwork inside air conditioned spaces shall be insulated as described above for
concealed duct work.
2 Exposed ductwork in non-air conditioned areas, insulate using the method described for
concealed ducts but using insulation with 50 mm of 35 kg/m3 polyisocyanurate (phenolic
foam) insulation. This may be installed in two layers, but with each layer staggered and
properly finished.

3 Finish insulation on duct work by applying a 200 g/m2 canvas cloth cover adhered between
two coats of approved funigicidal protective fire resistant lagging adhesive.

4 The finished insulation shall then be clad with aluminium sheet 0.9 mm thick.

5 Where ducts penetrate the building the duct shall be flashed and waterproofed before any
insulation is applied.

7.4.3 External Ductwork

1 All external ductwork shall be insulated with 50 mm thick fibre glass slab.

2 The insulation shall be installed as detailed for exposed ductwork except that the insulation
shall be covered with fibre glass cloth 200 g/m2.

7.4.4 Acoustic Lining

1 Acoustic lining shall be provided when specified in the Project Documentation.

2 The lining shall be glass fibre or mineral wool slab and faced to minimise fragmentation and
fibre fly. The type and thickness of the lining shall be approved by the Engineer.

3 The ductwork shall be size to allow for the thickness of the lining.

4 The ductwork surfaces must be thoroughly cleaned and the lining fixed by an approved
adhesive over the whole area to be lined.

5 Mechanical fasteners must be used at 400 mm maximum centres and not more than 75 mm
from joints, corner breaks etc.

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6 All edges shall be sealed or enclosed by a light metal section mechanical fastened to the
duct.

7 If required by the Engineer, metal mesh may be required as a precaution against

displacement or break up.

7.4.5 Circular Duct Insulation

1 Circular supply and return air ductwork shall be insulated with flexible fibre glass blanket of
density 24 kg/m3 and covered with reinforced aluminium foil

2 Blanket thickness shall be 50 mm compressed to 25 mm during installation for internal ducts

and 100 mm compressed to 50 mm for external ducts.

3 The method of installation shall be the same as for rectangular ducts.

4 Aluminium bands 25 mm wide shall be installed at 500 mm centres

5 Vapour sealing shall be carried out as specified for rectangular ducts

6 Additional protection shall be provided for exposed ducts if specified in the Project
Documentation.

7.5 EQUIPMENT INSULATION

7.5.1 Refrigerant and Condensate Drain Pipe Insulation

1 The pipe covering and insulation shall be manufactured by a recognised manufacturer and
shall be neatly installed to the following specification. The general intent is to provide a sealed
insulation which will not permit sweating of the pipes and which will not retain moisture to the
detriment of its insulating capability.

2 The refrigerant suction lines only shall be insulated with 19 mm thick foam rubber having a
thermal conductivity factor of 0.036 W/m2/K and a maximum water permeability of 0.09
µgm/NH. Alternatively, the pipes shall be insulated with 50 mm thick rigid fibreglass insulation
and vapour sealed in the same manner as chilled water pipes as detailed in Part 5 of this
Section.

3 The material shall be supplied as pre-formed pipe sections in tubular or pre slit form.

4 The insulation shall be installed accordingly to the manufacturer’s recommendations using a

non-flammable adhesive.

5 All exposed insulation shall be given two coats of chlorosulphonated polyethylene paint.

6 All condensate drains within plant rooms or other internal areas subject to damage or
sweating shall be insulated using 25 mm thick rigid fibreglass or 10 mm thick foam rubber
insulation. The insulation shall be vapour sealed as for chilled water pipes as detailed in Part
5 of this Section.

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7.5.2 Apparatus Casings

1 Insulate apparatus casings which are not provided with insulation as follows:

2 apply generally 50 mm of rigid polyurethane insulation, 24 kg/m3 density. On the underside of

coil sections, apply 50 mm thick polyurethane insulation, 24 kg/m3 density. All joints are to be
sealed in cold adhesive compound.

3 Ensure that any access panels are insulated to the same standard and are openable.

4 For small units, cover the entire outside assembly with waterproof self adhesive glass fibre
tape. This must be at least 75 mm minimum width and must overlap at least 50 % on each
application, to achieve watertight conditions.

5 For larger units, provide a weather resistant enclosure outside the insulation, subject to
Engineer’s approval.

6 Ensure that all equipment meets these requirements, regardless of manufacturer’s standard
practice, and add insulation as required to the above standard.

7 Where insulation, re-installation or additional insulation is required to the casing of externally

mounted air conditioning units, the insulation shall be covered with sheet Aluminium, of 0.9
mm or thicker.

8 Insulation of drain pans is specified for AHU and FCU regardless of the manufacturer’s
standard supply, the contractor shall re-insulate on site if necessary so that the specification
is complied with in full.

END OF PART

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8 EXHAUST FANS ...................................................................................................................... 2

8.1 GENERAL ................................................................................................................................ 2
8.1.1 Scope 2
8.1.2 References 2

8.2 EXHAUST FANS ...................................................................................................................... 2

8.2.1 General 2
8.2.2 Centrifugal Extract Fans 3
8.2.3 Axial Extract Fans 4
8.2.4 Roof Mounted Extract Fans 4
8.2.5 Twin Fan Toilet Extract Units 5
8.2.6 Wall and Window Mounted Extract Fans 5
8.2.7 Propeller Type Extract Fans 5
8.2.8 Kitchen and Smoke Extract Fans 6
8.2.9 Protectively Coated Extract Fans for Corrosive or Hazardous Use 6
8.2.10 Bifurcated Extract Fans 6
8.2.11 In-Line Extract Fans 7

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8 EXHAUST FANS

8.1 GENERAL

8.1.1 Scope

1 This Part details the requirements for all types of extract fans as specified in the contract.

2 Related Sections and Parts are as follows:

Section 1 General
Section 21 Electrical
8.1.2 References

1 The following Standards are referred to in this Part:

BS 848........................Fans for general purpose
BS 5000......................Rotating electrical machines of particular types or for particular
applications

8.2 EXHAUST FANS

8.2.1 General

1 The make and design of the exhaust fans shall be approved by the Engineer and evidence
supporting the claimed noise efficiencies shall be submitted for approval prior to placing the
order. Where fans are fitted with noise attentuators full details of the attenuators shall be
given.

2 Belt driven fans shall be fitted with pulleys suitable for V-belts. The pulleys shall be fixed by
taper lock type bushes and shall be secured to the fan and motor shaft by keys fitted into
machined keyways.

3 All fans which are to large or heavy to be man handled safety shall be provided with eyebolts
or other lifting facilities to enable mechanical lifting equipment to be used.

4 The whole fan assembly shall be fully finished against corrosion.

5 Access shall be provided to carry out all necessary maintenance required.

6 The electrical terminal box shall be located to allow for easy connection and disconnection
the electrical supply.

7 Where required suitable guards shall be installed to protect against all moving parts including
the motor.

8 All motors are to be positioned to permit effective ventilation of the motor and all components
of the fan and motor are to be suitable to withstand the temperature conditions expected.

9 All fans shall be installed to avoid vibration and noise to the ductwork or building fabric.

10 Each fan motor shall be designed to drive its respective fan when the fan is operating at a
speed or pitch angle 10 % in excess of that required to meet the fan performance.
11 Where required flexible connections shall be installed at both the inlet and outlet of each fan.

12 All extract fans shall have the direction of rotation discharge direction and arrangement to suit
the space conditions.

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13 All extract fans shall be provided with an electrical isolator adjacent to the unit.

14 The fan motors shall be insulated to a minimum of a Class ‘B’ insulation

15 All fans shall be capable of operating at ambient temperatures of 50 °C and the casing
material shall be able to withstand sun radiation temperature upto 85° C.

16 The noise ratings for each fan shall not exceed the levels specified in the QGEWC
regulations for the area being served.

17 All fans used for life safety operations or hazardous operations shall be subject to Civil
Defence Department approval.

18 The extract fans shall be axial, centrifugal or mixed flow as detailed in the Project
Documentation.

8.2.2 Centrifugal Extract Fans

1 The centrifugal extract fans shall be of the non-overloading type.

2 The fan housing shall be rigidly built and braced. Where the fan scroll is 450 mm or more in
width an access door with frame and gasket shall be provided. All access doors shall be
fabricated so that the inner surface is flush with the inside of the fan scroll.

3 The fans shall not produce excessive noise as compared to units of like size and power when
used with the specified vibration isolation.

4 The fan manufacturer shall provide for approval for each fan, certified sound power ratings
with a octave band analysis and also the volume, horsepower, pressure characteristic curves
from shut-off to free delivery.

5 The fan impeller shall have ample strength and shall be statically and dynamically balanced
to avoid vibration.

6 The blades shall be designed to ensure quiet and efficient operation.

7 The fans shall be V-belt driven unless otherwise indicated.

8 The motor pulley shall be an adjustable type for two (2) grooves or less. Drives requiring
three (3) grooves or more shall be the variable pitch type.

9 Drives for fractional horsepower motors may have one belt rated at 200 % of motor
horsepower. All other fans shall have not less than two belts and shall have sufficient
capacity to drive the fan with one belt broken.

10 The fans shall be provided with belt and pulley guards manufactured of perforated metal or
other approved material. Covers shall be provided in the guard for the fan and motor shafts
for ease of taking tachometer readings without removal of the guard.
11 The fan motor shall be sized to drive its respective fan when the fan is operating at a speed
10 % in excess of that required to meet the fan performance. No motor shall operate within
the service factor.
12 All fans discharging directly up though the roof shall be equipped with a 40 mm casing drain
which shall be connected to the nearest floor drain.

13 All fans shall be factory coated with one coat of primer and one coat of machine enamel. The
interior of the fans shall be painted as per the manufacturer’s standard.

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14 The fan shaft shall be supported by least two roller or ball bearings with easy access to the
lubrication points where required.

15 All fans scheduled to be located outdoors shall be furnished with weather proof motor and
drive housings.

8.2.3 Axial Extract Fans

1 Axial flow fans shall be capable of giving the design flow when tested to BS 848.

2 The fan casing shall be constructed of mild steel plates with angle stiffeners, with the easing
hot dip galvanised after manufacture.

3 The inlet and outlet of the axial flow fans shall be flanged for connection to the system.

4 The casing shall cover both impeller and motor so that the fan can be removed without
disturbing adjacent ductwork or other components of the system.

5 A flame proof external terminal box shall be fitted on the casing.

6 All lubrication points shall be extended to outside the casing and in a position that will permit
easy access.

7 The impellers shall be die cast in aluminium and x-rayed after manufacture.

8 The impeller shall be capable of running continuously at 20 % in excess of the rated speed.

9 The impeller shall be keyed and locked to the shaft, which shall be statically and dynamically
balanced and tested at over speed prior to dispatch from the manufacturer’s works.

10 The blade angle shall be adjustable over at least a 30 ° range with markings at the base to
indicate the blade angle.

11 All motors are to be positioned to permit effective ventilation of the motor and all components
parts of the fan and motor are to be suitable to withstand the temperature conditions
expected.

12 A suitable support is to be provided for each fan. The frame is to be fabricated from rolled
steel channel with adequate cross members for bolting the fan in position.

13 Anti-vibration mountings and flexible connection shall be provide to isolate the fans from the
adjacent ductwork and building fabric.

8.2.4 Roof Mounted Extract Fans

1 The roof mounted extract fans shall meet the appropriate requirements as detailed in the
general section.

2 The cowls and bases shall be of a weather proof material such as galvanised after
manufacture, aluminium, aluminium magnesium alloy or glass fibre.

3 Cases shall be formed so as to ensure a weather proof fitting.

4 Provision for access to the fan components shall be provided.

5 The fans shall be provided with back draught dampers and/or fire release dampers where
indicated.

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6 Bird guards of not greater than 25 mm mesh shall be provided as an integral part of the unit.

7 The fans shall be mounted on a weather proof curb at least 200 mm above the finished roof
level.

8.2.5 Twin Fan Toilet Extract Units

1 The unit casing shall be manufactured in epoxy coated aluminium alloy and shall house the
twin fan assemblies.

2 Each fan shall be a double inlet forward curved centrifugal impeller running in an individual
scroll.

3 The impeller may be either direct driven or belt driven depending upon the fan duty.

4 Direct driven fans shall incorporate a volume control damper on the suction side to regulate
the volume to the required duty.

5 The motors shall be manufactured to BS 5000 TEFV type with sealed for life bearings.

6 The fans shall be fitted with air flow sensors and shall discharge into a common plenum
through a linked shutter system.

7 Motors and flow sensors shall be pre-wired to a fitted isolator accessible from outside the
unit.

8 The toilet extract units shall be supplied for either roof mounting duct mounting or installation
within a plant room as indicated on the drawings.

9 The toilet extract units shall be supplied with auto change over panels with duty/standby
selector switch, run/fail indication lamps and cyclic relay for duty sharing.

8.2.6 Wall and Window Mounted Extract Fans

1 Extract fan shall be of the propeller type suitable for wall/window mounting.

2 The fan construction shall be of moulded plastic

3 Motors shall be of the shaded pole induction type enclosed in an aluminium alloy case and
protected by a thermal over load cut out.

4 The motor bearings shall be self alignment sealed for life type.

5 The fans shall be provided with a solenoid operated back draught shutters. The solenoid
shall open and close the back draught damper silently as the fan is switched ON and OFF.

8.2.7 Propeller Type Extract Fans

1 The impeller shall be of steel or aluminium and the blades shall be fixed to the hub or the
blades and hub shall be formed in one piece.

2 The bearings shall be ball, roller or sleeve type sealed for life or with accessible lubrication
points.

3 The propeller fans may be ring mounted diaphragm mounted or diaphragm mounted in a
casing. The casing shall be longer than the length of the motor and fan.

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4 The casing shall be of steel construction with flanged ends and shall incorporate an
inspection door.

5 The terminal box shall be mounted externally on the casing.

6 The tip speed of the fans shall not exceed 20 m/s.

7 Inlet and outlet grilles shall be installed on the fans incorporating gravity back draught
damper.

8.2.8 Kitchen and Smoke Extract Fans

1 The fans shall be especially designed for smoke and kitchen extract

2 The fans can be either belt or direct driven with the motor fixed on resilent mountings outside
the air stream.

3 Kitchen extract fans shall be fitted with a housing drain and grease trap easily removable for
cleaning.

4 The fans shall be suitable for removal of smoke and grease laden vapours.

8.2.9 Protectively Coated Extract Fans for Corrosive or Hazardous Use

1 Where the fans are required to handle corrosive toxic flammable explosive or high
temperature gases the materials and construction shall be required to suit the application and
all relevant safety regulations shall apply.

2 Bearing and lubrication arrangements shall be suitable for the conditions expected.

3 Where protective coating is required to use with corrosive gases the coating shall cover al
parts of the complete fan, motor and casing assembly which will be in contact with the
corrosive gases.

4 No fan shall be installed if the protective coating has been damaged in any way.
5 The impeller casing shall be as specified in the Project Documentation.

6 All fans shall be subject to Civil Defence Department approval.

7 The fan motors for hazardous use or required to handle flammable or explosive gases shall
be flame proof.

8.2.10 Bifurcated Extract Fans

1 Bifurcated extract fans shall be axial type fans.

2 The motor shall be completely out of this air stream.

3 The motor may be placed between the two halves of the casing in the external air or may be
placed within the casing provided that effective ventilation is given to the motor.

4 The fan motor and bearings shall be suitably rated for operation at the temperature they may
experience.

5 The fan construction and installation shall be specified for axial extract fans in Clause 8.2.3 of
this Part.

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8.2.11 In-Line Extract Fans

1 In-line extract fans shall be centrifugal, axial or mixed flow type fans as detailed in Project
Documentation.

2 The construction and installation shall be as specified

(a) centrifugal fans Clause 8.2.2

(b) axial/mixed flow Clause 8.2.3.

3 The casing shall be rigidly constructed of mild steel or aluminum alloy and shall be stiffened
and braced to obviate drumming and vibration.

4 Mounting feet shall be provided for bottling to a base or supports.

5 The inlet and outlet shall terminate with flanges to facilitate installation and removal.

6 Access panels shall be provided and shall be sized to facilitate maintenance.

END OF PART

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9 ACCESSORIES ....................................................................................................................... 2
9.1 GENERAL ................................................................................................................................ 2
9.1.1 Scope 2

9.2 SOUND AND VIBRATION CONTROL EQUIPMENT .............................................................. 2

9.2.1 General 2
9.2.2 Silencers 2
9.2.3 Anti-Vibration Mountings 3
9.2.4 Resilient Hangers 3
9.2.5 Rubber or Neoprene Mounts 3
9.2.6 Concrete Inertia Base 4
9.2.7 Plate Bases 4
9.2.8 Acoustic Louvers 4

9.3 INSTRUMENTS AND GAUGES .............................................................................................. 5

9.3.1 Pressure Gauges 5
9.3.2 Thermometers 5
9.3.3 Dial Type Thermometer 6
9.3.4 Manometers 6

9.4 CONTROL SYSTEMS.............................................................................................................. 6

9.4.1 General 6
9.4.2 Temperature Humidity Sensor and Controller 8
9.4.3 Control Valves 9
9.4.4 Motorized Control Dampers 10
9.4.5 Step Controllers 10
9.4.6 Standard Control Interlocks 11
9.4.7 Control System Conduits and Wiring 11
9.4.8 Start up and Commissioning 11
9.4.9 Guarantee 12

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9 ACCESSORIES

9.1 GENERAL

9.1.1 Scope

1 This Part details the requirements for accessories that are to be included as specified in the
Project Documentation.

2 Related Sections and parts are as follows:

This Section
Part 5 Chilled Water Pipework

Section 1 General
Section 10 Instrumentation control and Automation
Section 21 Electrical Works

9.2 SOUND AND VIBRATION CONTROL EQUIPMENT

9.2.1 General

1 The noise produced by the installation in the spaces served, in adjacent buildings and in the
open air surrounding plant rooms shall be kept as low as possible. This shall be specially
considered in the selection of fans (including those for condensers and cooling towers),
motors fan coil units and terminal units, grilles and diffusers and the internal finish and
arrangements distribution ducting.

2 All plant and equipment shall be isolated in such a manner that noise and vibration is not
transmitted through the structure.

3 Anti vibration equipment will be manufactured by a specialist company acceptable to the

Engineer with standard ratings information available.

4 All necessary provisions shall be included to reduce the noise level of all plan and equipment
to the required level detailed in the QGEWC regulations.

9.2.2 Silencers

1 All silencers shall be fitted with drilled angle flanges to suit the adjacent plant.

2 The method of installing the acoustic elements in the casing shall not cause air leaks.

3 The acoustic elements shall incorporate full aerodynamic leading and trailing edges (not
square ends).

4 The acoustic material installed in the element shall be inert, rot and vermin proof, non-
hygnoscopic, non-combustible mineral wool or glass fibre acoustic medium.

3
5 The acoustic material shall be packed to a density of not less that 48 Kg/m and retained by a
perforated steel sheet facing and fine membrane to stop the acoustic material contaminating
the system air.

6 Where required for water or grease laden duties an imperious but acoustically transparent
membrane shall be fitted behind the perforated metal facing.

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7 The silencer units shall be delivered to site with blocked ends to prevent the ingress of debris
during installation and storage to reduce the risk of damage.

8 The silencers shall be constructed of heavy gauge steel and shall match the adjacent
ductwork. Galvanized silencers shall not be used in stainless steel ductwork etc.

9 The silencers shall be factory manufactured and technical data submitted and approved in
advance of ordering the units. The technical data shall include both the acoustic and
aerodynamic performance.

10 Where a silencer is made under licence or part assembled locally, tests must be made after
assembly and witnessed by an independent authority.

11 The static pressure loss of all silencers required shall be considered in all handling
equipment original selection.

9.2.3 Anti-Vibration Mountings

1 All dynamic machinery shall be isolated from the building structure by vibration isolators
and/or vibration isolation materials which shall be specifically designed and selected to suit
the machinery for which it is to be used.

2 Spring anti-vibration mounts.

(a) each mounting shall consist of a telescopic top and bottom housing containing one or
more helical steel springs of 50 mm minimum diameter as the principle isolation
elements
(b) the bottom plate shall be fitted with a 6 mm thick neoprene pad bonded to it to reduce
high frequency flaming
(c) when used with equipment having a fluid weight in excess of 25 % of the total empty
equipment weight a suitable hold down or restrained shall be incorporated
(d) the mounting shall incorporate a built in levelling device and resilient inserts as guides
for the upper and lower housings.
(e) all spring mounts shall be designed such that the lateral spring stiffness is equal to the
vertical stiffness
(f) the spring mounts shall be selected for all items of plant with stiffness to cater for any
eccentric weight distribution over the unit base
(g) an equal static deflection shall be provided on all mounts to avoid the possibility of
flanking caused by the plant tilting and rendering one or more of the mounts solid.

9.2.4 Resilient Hangers

1 Resilient hangers shall be of the two element design with helical spring and neoprene in -
shear element.

2 The elements shall be mounted in a steel section pre-drilled and tapped at the top and
bottom to receive threaded hanger rod.

3 The resilient hanger shall be located so that they are vertical.

9.2.5 Rubber or Neoprene Mounts

1 The mounts shall consist of a steel top plate and base plate completely embedded in colour
coded neoprene for easy identification of rated load capacity.

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2 The mountings shall be moulded with non-skid ribbed construction on the top plate and base
plate.

3 The mountings shall be equipped with bolt holes in the base plate and tapped holes in the top
plate so that they can be bolted to the floor and equipment when required.

4 Plant and equipment as detailed in the QGEWC regulations shall be installed on anti-
vibration units in the form of multi-layer rubber pads.

5 Multi-layer pads shall compose of rubber sheets with square grid pattern on both sides and
steel insert sheets of 1.4 mm. The composite pad thickness shall be selected the suit the
equipment but shall not be less than 32 mm.

9.2.6 Concrete Inertia Base

1 The concrete inertia base shall be constructed of an all welded steel framework.

2 Height saving brackets shall be welded to the framework to install the anti-vibration mounts.

3 The frame depth shall be approximately 1½ the longest dimension of the equipment, with a
minimum depth of 150 mm.

3
4 The bottom of the frame shall be blanked off and concrete (2,300 kg/m ) poured over steel
reinforcing rods positioned 35 mm above the bottom.

5 The total weight of the base shall be at least 1.5 times the total equipment weight.

6 Concrete inertia bases for split case pumps shall be extended in width to allow for provision
of supports for suction and discharge elbows.

7 When complete with the equipment installed checks shall be carried out to ensure that a
positive air gap is present between the inertia base and floor.

9.2.7 Plate Bases

1 Where required equipment shall be mounted on anti-vibration rails or steel plant bases.

2 The anti-vibration rail shall comprise of steel beam with height saving brackets at each end.

3 The steel plant bases shall comprise of an all welded steel framework to support the
equipment. This may form a composite A.V. rail.

4 The A.V. rails or steel plant bases shall be sufficiently rigid to provide adequate support for
the equipment and prevent undue strain on the equipment.

9.2.8 Acoustic Louvers

1 All acoustic louvers shall be designed to reduce the airborne noise of plant down to minimum
ambient levels with an air velocity not exceeding 3.0 m/s.

2 The louver aerofoils shall be constructed of perforated galvanized mild steel sheet and
packed with a fibre acoustic medium as specified for silencers.

3 The complete unit shall be supplied complete or in sections with a galvanized mesh bird
screen.

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4 The unit shall be provided with all necessary fixing holes and lugs for location within a
builders work frame.

5 The external finish of the unit shall be approved by the architect to match other finishes.

9.3 INSTRUMENTS AND GAUGES

9.3.1 Pressure Gauges

1 The pressure gauges shall be 100 mm diameter stainless steel case with black figures on a
white background. The movement shall be stainless steel or phosphor bronze with rotary type
movement and bourdon tube.

2 Where the line size is 100 mm or less the gauge is to be installed into a T-branch with
reduces. For pipe sizes above 100 mm a “threadolet” weld on connection may be used
subject to proper procedures and requirements of the Clause 1.1.17 of Part 1 of this
Section.

3 The gauges shall be mounted using a mild steel syphon and brass gauge cock.

4 The range of the gauges shall be selected such that the operating point is almost midway of
the selected range.

5 Where gauges are to be mounted separate from the equipment to which they relate a gauge
board shall be used. The gauges shall be fixed to resiliently mounted gauge boards with each
gauge identified by a permanently fixed label

6 Where pressure gauges are mounted on the suction and discharge of pumps the gauges
shall be connected to the tappings on the pumps when provided.

7 Pressure gauges shall be installed to monitor the pressure at the following locations.

(a) pump suction and discharge

(b) chiller flow and return connections
(c) AHU flow and return connection
(d) heat exchange flow and return connections.

9.3.2 Thermometers

1 Wet service thermometers shall be straight shank coloured mercury filled insertion type. They
shall have a stem length of 80 mm and a scale length of 225 mm, and the capability of
adjusting the angle of the scale to the stem. Copper or brass separable well shall be provided
for each thermometer.

2 Air service thermometers shall be straight shank coloured mercury filled insertion type. They
shall have a stem length of 150 mm and scale length of 225 mm, and the capability of
adjusting the angle of the scale to the stem.

3 The thermometers shall be graduated in °C with 2 °C divisions.

4 Where the temperature of equipment is to be monitored remotely, remote reading vapour

actuated thermometers shall be used. The thermometer shall have a stainless steel case
and phosphor bronze movement with 100 mm dial diameters with flush type back outlet. The
connecting tube shall be double braided bronze armour over a copper capillary and copper
bulb.

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5 Where thermometers are to be mounted separate from the equipment to which they relate a
gauge board shall be used. The gauges shall be fixed to resilient mounted gauge boards with
each gauge identified by a permanently fixed label.

6 Thermometers shall be installed to monitor the temperature at the following locations:

(a) chiller flow and return connections

(b) AHU flow and return connections
(c) heat exchangers flow and return connections.

9.3.3 Dial Type Thermometer

1 The thermometers shall be 100 mm diameter vapour pressure type.

2 The casing and movement shall be non-ferrous material

3 The dial shall be white with black numbering

4 Dial type thermometers shall be installed as indicated in the Project Documentation.

9.3.4 Manometers

1 Incline or vertical manometers shall be plastic or metal construction. They shall be filled with
coloured fluid to indicate the pressure being measured and have a zero adjustment for
calibration.

2 The manometer shall be suitably sized for the pressures to be monitored.

3 The manometers shall be located in an accessible position so that the pressure can be
recorded.

4 The tubing shall be neatly fixed and protected from damage when required.

5 Manometers shall be installed across all filters and the clean and dirty pressures shall be
clearly identified.

9.4 CONTROL SYSTEMS

9.4.1 General

1 The Contractor shall include in his tender for an Automatic Control System to be supplied and
engineered by a specialist controls supplier (SCS). In his choice of SCS, the Contractor must
ensure that all systems to be supplied are fully and exactly compatible with the Project
Documentation. The SCS shall be responsible for the entire control system. He shall allow for
the supply, installation and commissioning of all items and materials necessary to achieve
the control functions defined in this section and elsewhere in the Project Documentation.
Subject to the Consultant's approval, control systems may also be supplied by the
manufacturer of the equipment being controlled. Such manufacturer will be subject to the
same terms and conditions as the SCS.

2 The SCS, as a specialist, will be aware of, and will include for any special services or
conditions arising from any equipment to be supplied by the Contractor, whether the originally
specified item or any proposed and approved alternate.

3 When the SCS staff are on site they shall work in close harmony with all other trades and
shall assist other Subcontractors in works associated with the overall control system
installation.

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4 The SCS shall include in his costs for the preparation of all drawings, manuals, record
drawings and labels as specified. He shall allow for the regular attendance on site of a
qualified Engineer to provide technical liaison during the currency of the installation and
ensure complete testing, commissioning, cleaning, making good and handing over of the
works as detailed in this section.

5 The entire control system shall be complete with all necessary control devices, thermostats,
valves, motors, relays, switches, dampers, panels, low voltage wiring, electronic components,
etc., to provide the functions as described in this specification, or required, whether
specifically mentioned or not. All controls shall be the product of one manufacturer, unless
otherwise approved in advance.

6 The control system shall be installed or supervised complete in all respects by competent
mechanics, regularly employed by the manufacturer of the control system.

7 All automatic control valves and dampers shall be manufactured by the control manufacturer
or as otherwise specified and shall be installed in pipelines and ducts by the respective trade
under the supervision of the control manufacturer. All electric wiring in connection with the
control system shall be installed as hereinafter detailed.

8 Complete drawings shall be submitted to the Consultant for approval before any field
installation is started. Such drawings shall give complete descriptions of all control elements
and shall show complete schematic wiring diagrams including functional description.
Drawing shall indicate specifically the type of finish of all room exposed controls, and such
finish shall be subject to the Consultant's approval.

9 Any descriptive parts of this specification shall be considered complimentary to detail

requirements for types of equipment. Any quantities noted are approximate and must be
measured by the Contractor before bidding.

10 Verification systems shall be interlocked with the fire alarm system as specified and as
required by the Local Authority and all necessary control and interfacing devices shall be
provided after fully co-ordination with fire alarm system controls.

11 Automatic control systems may be of the electromechanical or electronic type as described in

the Project Documentation. Unless otherwise specified control systems shall be energised as
follows:

(a) electric Control Systems 110 or 240 volts.

(b) electronic Control Systems - Standard 24 volts
The installation may be a single system or a combination of systems.
12 All control equipment including all control valves, dampers and actuators shall be selected
sized and rated to suit the application and operating conditions of the systems in which they
are installed to provide stable and repeatable performance of the systems being controlled.

13 All items of control equipment shall be compatible within any system, between systems and
with controlled equipment.

14 All items of control equipment shall be sited such that access for adjustment and
maintenance purposes is not impeded. However, where items of control equipment are
mounted in accessible positions within normally occupied area, the control items shall be
provided with secure tamper proof enclosures to prevent unauthorised interference.

15 Control system shall be arranged such that, in the event of electrical power failure or other
abnormal operating conditions, inherent fail-safe features are provided to equipment and
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systems to prevent potentially hazardous conditions arising.

16 The sensitivity of sensors and the speed for response of actuators shall be selected for
complete compatibility with the system application requirements.

17 All control components shall be of high quality, low risk rate and of long term reliability for
both continuous and intermittent use and shall maintain accuracy and high repeatability of
commissioned performance.

18 Where equipment requires less than 240 volts supply, all necessary voltage transformers
shall be provided either separately or integrated with the various packaged equipment.
Equipment requiring DC supply shall be provided with all current rectifiers and shall be
suitable for the connected loads.

19 All controls shall be compatible with the existing building management systems when the
system is an extension of an existing system.

9.4.2 Temperature Humidity Sensor and Controller

1 All temperature sensors shall be semiconductor type with NTC sensing element and shall
have suitable range of operation i.e. 0 to 30°C. 20 to 105°C. etc. The housing shall be plug-in
type with terminals on the base plate enabling the wiring without disturbing the sensor. The
sensor shall be field wired using a unscreened cable to a base plate.

2 The temperature sensor shall have a tolerance of + 1°C and a fast response time.

3 Elements sensing liquid temperature in pipework shall be:

(a) provided with means for withdrawal for calibration, servicing etc., without the need for
draining the system
(b) positioned so that the active part of the element is wholly within the liquid;
(c) positioned so that the element is not less than 12 pipe diameters downstream from a
point of mixing.

4 Elements sensing the temperature of air in a duct shall be positioned so that:

(a) the element is not subject to radiation

(b) account is taken of temperature stratification, (i.e. positioning for high temperature limit
sensing, positioning for average temperature sensing)
(c) if of the capillary averaging type, it is installed on a suitable framework and is suitably
arranged for servicing
(d) if used for determining the dew point and the air adjacent to the element is known to be
saturated within acceptable limits, the construction and material of the element shall be
compatible for use in moist air.

5 Elements sensing the temperature of a solid surface shall be positioned and fixed so as to
give good thermal contact.

6 The precise location of site elements sensing the temperature of a room or other such space
in a representative position shall be approved by the Engineer.

(a) where indicated it shall be at a height of approximately 1.7 m above floor level (when
fitted in a room);
(b) in the return air path where indicated.

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7 Room thermostats for FCU shall include a temperature set point with a remote sensor
installed in return air duct work or as an integral part of the controller as specified a 3 speed
switch for fan speed control and a fan-off-cool switch.

8 Humidity sensing element positions shall be:

(a) representative of the space in which the humidity is being measured

(b) such that the air velocity is within the range required by the sensing element
(c) arranged to ensure that the air reaching the elements is free from airborne
contaminations.

9 Basically all sensing elements shall be correctly located strictly in accordance with the
manufacturer as recommendations.

10 All controllers shall be fully proportional type with proportional band of upto 10 °C. The dead
zone between the stages shall be adjustable upto + 5 °C. The controllers shall be of plug in
type construction and shall be designed for removal from the pre-wired bases without
disturbing the wiring. The electronic circuit shall amplify the deviation of the sensor signal
from the setpoint on the controller to produce a fully proportional signal to modulate the
controlled device such as three (3) way control valve etc.

9.4.3 Control Valves

1 All control valves shall be selected and sized by the controls equipment manufacturer and
shall be suitable for the systems application and operating conditions.

2 Unless otherwise stated valves shall be of the modulating type with adequate rangeability,
having equal percentage or power linear characteristics.

3 Valves shall be provided with the following minimum valve lifts:

(a) valves up to 25 mm in size shall have a minimum lift of 8 mm

(b) valves of 32 to 50 mm in size shall have a minimum lift of 12 mm
(c) valves up to 65 mm in size shall have a minimum lift of 20 mm

4 Valve authorities shall generally be in the range of 0.3 to 0.5 but compatible with economic
valve pressure drops sufficient to provide adequate control without promoting cavitation.

5 Actuators on all valve shall be capable of opening and closing the valves against the
maximum system operating pressures,

6 All valves, other than on terminal units such as fan coil units shall be provided with external
position indicators. They shall be complete with actuators, mounting brackets and all
necessary auxiliary switches.

7 Seats and stems shall be removable and of stainless steel, except where alternative seating
material is necessary to provide tight shut-off.

8 Valves upto 50 mm shall be of bronze bodies construction with stainless steel trim.

9 Valves of 65 mm size and above shall be of cast/nodular iron or steel bodies construction as
suitable for the pressure and temperature conditions having stainless steel trim.

10 The copper content of alloy valves shall be as high as possible to avoid dezincification.

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11 All valves shall be embossed with the manufacturer’s logo, valve size and direction of flow.

12 Valves, shall be provided with clutch or lifting mechanism to enable valves to be controlled
manually in the event of power source failure.

13 Unless otherwise specified, control valve actuators for chilled water coils shall be fitted with
spring returns to the safe position on failure of electrical supply, to provide necessary plant
protection shut-off or relief conditions to systems or equipment.

9.4.4 Motorized Control Dampers

1 Control dampers and actuators shall be selected and sized to provide the desired power and
performance characteristic in accordance with the control equipment manufacturer’s
recommendations,

2 All damper shall be provided with a heavy duty and rigid mounting bracket and all necessary
auxiliary switches.

3 Mixing and volume control dampers shall be of the modulating type.

(a) actuators shall be provided with spring returns where they are specified to open or
close on power failure
(b) all fresh air dampers shall close on power failure of emergency and normal plant shut
down
(c) all actuators shall be provided with position and direction indicators.

4 Mixing and throttling dampers shall be sized to provide adequate control over the full
movement of the dampers, giving near linear characteristics without incurring high pressure
drops which should not exceed 10 % of the controlled circuit pressure drop when fully open.

5 Rotation angle of the damper motor spindle shall where possible correspond with the
required operating angle of the damper to which it is connected.

9.4.5 Step Controllers

1 Step controllers shall have adjustable differential and time delay between operations of each
step and speed of loading and unloading. Each stage shall operate in sequence. The
controllers shall be capable of interlocking with each other for series operation from the same
sensor output.

2 The controllers shall recycle to ensure that on normal shut-down, power failure or manual
interruption of the power supply, the controllers recycle to the "off' position before
reenergising the controlled circuits.

3 All contacts shall be suitably rated for the imposed load or loads

4 Where used to control electric air heaters, step controllers shall be arranged to switch the
heaters on in three phase balanced stages not exceeding 9.0 kW per three-phase stage
except that stages up to 3 kW may be single phase, providing the supply air temperature
does not vary by more than 4 ºC. per stage. A time delay of not less than five seconds shall
precede each stage after the first on loading heaters.

5 Switching condition shall be indicated by lamps on the front face of the controller.

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9.4.6 Standard Control Interlocks

1 Unless otherwise specified the following equipment interlocks shall be provided:

(a) provide timers in the control circuits of all pumps to enable the pumps to continue to
run for a period after such-down of cooling plant
(b) on plant start up and shut down operation, control circuits shall be arranged for
staggered switching of motors to avoid simultaneous large electrical loads being
imposed on the power cabling and power plants
(c) under normal operating conditions, the extract fan starters shall be interlocked with
their respective supply fan starters and stop locks
(d) humidifiers and electric heater batteries shall be interlocked with their associated
supply air fan to shut down the humidifier and electric heater battery when the supply
fan stops, or on power failure
(e) fresh air inlet and discharge dampers shall close on normal plant shut down and power
failure. Operation from smoke detectors shall be as specifically required by the local
authority or as per the dictable of the fire alarm and control system
(f) on full fresh air plants the air inlet dampers shall open before the fan can operate, by
use of damper motor end switches
(g) where duty and stand-by pumps are provided, the selected duty pump shall start and
operate as required. Should the duty pump fail to start, a fault alarm shall be given
and the stand-by pump, after a pre-set period, shall operate. The same automatic
change-over sequence shall apply should a pump fail during normal running
(h) when electric heating batteries and cooling coils are to be operated in sequence a
dead zone shall be provided between each sequence
(i) all chilled water valves shall close on all plant shut down conditions unless otherwise
stated.

9.4.7 Control System Conduits and Wiring

1 Wherever possible conduits are to run in poured concrete from control points to equipment
locations. Terminations at both ends are to be standard electrical junction boxes. All conduit
work will be done in accordance with the relevant provisions of Section 21, Electrical Works,
and shall be undertaken by the Electrical subcontractor, In the event that conduit work is not
undertaken at the time of concrete pouring, then the specified conduit shall be used and run
on the surface, except in areas where surface conduit would be unacceptable to the
Consultant.

2 Wiring shall be done in accordance with the relevant provisions of Section 21, Electrical
2
Works, with the minimum wire size of 0.8 mm with an outer metal screen for extra low
2
voltage systems and 1.5 mm for line voltage systems. In any event all wire sizes shall be
calculated to ensure proper voltage conservation up to actuator points.

3 Wiring shall be the responsibility of the specialist control supplier (SCS) but may be done by
the Electrical subcontractor under the supervision of the SCS.

9.4.8 Start up and Commissioning

1 After completion of the control system installation, the control supplier shall regulate and
adjust all thermostats, control valves, damper motors, etc., and place them in complete
working order subject to the approval of the Consultant.

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2 Complete instructions shall be given to the operating personnel. Such instructions shall be
exclusive of the time required for regulating and adjusting.

9.4.9 Guarantee

1 The control system herein specified shall be free from defects and workmanship and material
under normal use and service. If within 400 days from the date of practical completion
certificate any equipment herein described is proved to be defective in workmanship or
material, it shall be adjusted, repaired or replaced free of charge.

2 The SCS further guarantees that all components used on the project are State-of-the-Art
components and that parts and service, etc., will be fully available for them for a period of at
least 10 years after the date of acceptance. In the event of non-availability at any time in this
period, the SCS is to replace the particular class of item with a similar functional item for
which spares, service, etc., are available.

END OF PART

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PREFERRED VENDORS LIST

AIRCONDITIONING WORKS

SI.No. Description Brand Name Country of LOCAL AGENTS

Origin
1 Exhaust fan (wall 1 DYNAIR ITALY Maico gulf
mounted), roof mounted Qatar Insulation co,
extract fan, inline fan, Axil P.O Box: 7943
fans , Centrifugal fans Tel:44995077
Fax:44995088
2 ELTA FAN UK Metco Qatar.W.l.l
Tel: 44437980
Fax:44436129
3 XPELAIR UK Darwish Tarading
P.O.Box:92
Tel:4428164
Fax:4417599
4 Nuaire UK Qatar International
Trading Co W.L.L.
P.O. Box 9920
Tel: 44685311
Fax: 4686944
5 Greenheck

6 Woods

2 Wall mounted Split A/C 1 Carrier USA Carrier Qatar

Cassette type split A/C P.O.Box-23500
(Unitary Air Conditioning) Tel: 4310555
Fax:4310444
2 Mcquay USA Jersy Eng
P O Box 7922
Tel 44361999
Fax 44361888
3 DAIKIN USA TADMUR TRADING
W.L.L
P O Box 37493
Tel 44337000
Fax 44337100
4 Trane USA Darwish Trading
P.O.Box-92
Tel:4428164
Fax:4417599
3 Grilles, Diffusers 1 KMC Qatar KMC
P.O.Box-1038
Tel:4600293
Fax:4600189

2 ALDS

3 KBE Lebanon

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4 Anemostat USA

5 Euroregister Belgium

6 Trox UK

4 Thermal Insulation 1 Kimmco Kuwait

(Refrigerant Pipe) Jersy Eng
POBox 7922
Tel 44361999
Fax 44361888
2 Arabian Fibre KSA Tadmur Cont. & Trad.
Glass P.O.Box-6984
Tel:4413628
Fax:4410812
3 Holpak UK

4 Satchwell U.K Shahjan Trad

Tel:5524856
(Mr. Rajesh)
5 Armstrong

5 COPPER PIPES & 1 Yorkshire UK Al Andalus Trading

FITTING P.O.Box: 24155
Tel: 44432822
Fax: 44354322
2 Wednesburry UK Tadmur Cont.& Trad.
P.O.Box-6984
Tel:44413628
Fax:44410812
3 Mueller UK Tadmur Cont.& Trad.
P.O.Box-6984
Tel:44413628
Fax:44410812
6 Refrigerant Pipe 1 Armaflex
Insulation

2 Aeroflex

3 Kimmco Kuwait Jersy Eng

P.O.Box-7922
Tel:44361999
Fax:44361888
QATAR
7 Supports and Brackets 1 Hilti
(Hangers)

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2 Fischer

3 Mason

4 Unistrut

5 Mupro

6 Shield USA

7 Inka Turkey

8 Flamco Netherland

8 Ductwork (Sheet Metal) 1 Thyssen

2 Sheet Metal

3 British Steel UK Gerab National

Enterprises
P.O. Box 6349
Doha-Qatar
Tel. 44666100
Fax 44653040
QATAR

4 Nippon Steel Japan

5 Saudi Steel Technical Parts

Company
Tel: 44604326
Fax: 44604268
QATAR
6 NKK

9 Vibration Isolators 1 Kinetics USA

2 Mason USA

3 Sylomer

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4 Weicco USA

5 Vimco USA

10 Louvres 1 Ruskin USA

2 Trox UK

3 KMC Qatar KMC

P.O.Box-1038
Tel:4600293
Fax:4600189

3 Colt UK COLT, U.AE

P.O.Box 43659
Dubai
Tel: 42115168
11 Instrument, Gauges & 1 Dwyer USA
meters

2 Weiss Germany

3 Onicon USA

4 Hunter Canada

12 Insulation or Ductworks 1 Armeflex Germany

2 Foster UK

3 Idea USA

4 Arabian UAE
Insulation

5 Eimmco Kuwait

6 Afico KSA

7 Thermbreak Australia

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8 K-Flex Italy

13 Adesive & selant 1 Flinkkote Canada

2 H.B. Fuller Co UK

3 Bakelite Canada
Thermostat

4 MS Ideden UK
Adhesive

All the equipment for the project shall be procured only through the appointed local agent in
Qatar, who shall be the authorized agent and be able to supply the spare parts, etc. for the items
anytime in the future. The contractor shall mark the same clearly on the submittals (Manufacturer
/ local agent).

In case of any item/s required to be purchased abroad directly, for valid reasons, then the
contractor shall mention the same in the submittal and obtain approval from the Engineer
specifically.

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Section 23 FIRE FIGHTING
Part 1 General
Part 4 Fire Fighting Systems
Part 5 Testing and Commissioning

Addendum

Preferred Vendors List

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1 GENERAL ................................................................................................................................ 2
1.1 INTRODUCTION...................................................................................................................... 2
1.1.1 Scope 2
1.1.2 General 2

1.2 REGULATIONS ....................................................................................................................... 2

1.2.1 Electrical Installations 2
1.2.2 Civil Defence Department 2

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1 GENERAL

1.1 INTRODUCTION

1.1.1 Scope

1 This Section specifies the requirements for fire fighting systems, fire alarm systems and fire
protection systems.

1.1.2 General

1 The Clauses in this Specification and all other information provided in the Project
Documentation shall be considered to be a minimum requirement for performance and
quality.

2 All electrical and electronic equipment shall be designed, manufactured, erected and tested
to the International Electrotechnical Commission (IEC) standards.

1.2 REGULATIONS

1.2.1 Electrical Installations

1 All electrical installations shall comply with all the relevant provisions of the regulations of the
following:

2 Qatar General Electricity & Water Corporation

3 Institution of Electrical Engineers.

1.2.2 Civil Defence Department

1 The entire fire alarm system, fire protection system and fire fighting system including all
materials, components, equipment and accessories and their installation shall conform to the
requirements of Civil Defence Department of the Ministry of Interior, State of Qatar. Particular
attention should be made with respect to the time required by the Civil Defence Department
for approval of schematic and wiring diagrams, layout diagrams etc.

2 The fire alarm system contractor shall be registered with, and on the approved list of, the Civil
Defence Department.

END OF PART

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4 FIRE FIGHTING SYSTEM .................................................................................................... 3

4.1 GENERAL.............................................................................................................................. 3
4.1.1 Scope 3
4.1.2 Codes and Standards 3
4.2 SPRINKLER SYSTEMS ........................................................................................................ 3
4.2.1 System Description 3
4.2.2 Sprinkler Heads 4
4.2.3 Sprinkler System Alarm Devices 4
4.2.4 Alarm Valve 4
4.2.5 Basic Trip and Retarding Chamber 5
4.2.6 Pressure Alarm Switches 5
4.2.7 Water Motor Alarms 5
4.2.8 Stop Valves 5
4.2.9 Zoning Valve 5
4.2.10 Water Flow Detectors 5
4.2.11 Drain and Test Orifice 5
4.3 WATER SUPPLY................................................................................................................... 5
4.3.1 General 5
4.4 HOSE REELS AND HOSES.................................................................................................. 6
4.4.1 General 6
4.4.2 Cabinets 6
4.4.3 Hose Reels with Semi-Rigid Hose 6
4.4.4 Hose Systems with Lay-flat Hose 7
4.5 FIRE HYDRANTS .................................................................................................................. 8
4.5.1 General 8
4.5.2 High Pressure Dry Barrel Hydrant 8
4.5.3 Underground Fire Hydrants and Surface Box Frames and Covers 9
4.6 PIPES AND FITTINGS ........................................................................................................ 11
4.6.1 General 11
4.6.2 Hangers Supports Anchors and Guide 11
4.7 PUMPS ................................................................................................................................ 12
4.7.1 General 12
4.7.2 Horizontal Fire Pumps 12
4.7.3 Construction 13
4.7.4 Fittings 13
4.7.5 Electric Motors 13
4.7.6 Compression Ignition Engine 13
4.7.7 Controller and Transfer Switch 13
4.7.8 Alarm Panel 14
4.7.9 Jockey Fire Pumps 14
4.7.10 Field Quality Control 14

4.8 WET RISERS ...................................................................................................................... 15

4.8.1 General 15
4.9 PORTABLE FIRE EXTINGUISHERS .................................................................................. 15
4.9.1 General 15
4.10 FIRE BLANKETS ................................................................................................................ 16

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4 FIRE FIGHTING SYSTEM

4.1 GENERAL

4.1.1 Scope

1 This Part specifies the requirements for fire fighting systems.

2 Related Sections are as follows:

Section 21 Electrical Works
4.1.2 Codes and Standards

1 The following standards are referred to in this Part:

ANSI B16.1 ................Cast iron pipe flanges and flanged fittings
ANSI B16.5 ................Pipe flanges and flanged fittings
ASTM A 47 .................Specification for Ferritic Malleable Iron Castings
ASTM A 106 ...............Specification for Seamless Carbon Steel Pipe for High-Temperature
Service
ASTM A 135 ...............Specification for Electric-Resistant-Welded Steel pipe
ASTM A 183 ...............Specification for Carbon Steel track Bolts and Nuts
ASTM A 197 ...............Specification for Cupola Malleable Iron
ASTM A 234 ...............Specification for Pipe Fittings of Wrought Carbon Steel and Alloy for
Moderate and Elevated temperatures
ASTM A 395 ...............Specification for Ferritic Ductile Iron Pressure-Retaining Castings for
Use at Elevated Temperatures
ASTM A 536 ...............Ductile Iron Castings

BS 750........................Underground fire hydrants and surface box frames and covers

BS EN 1561 ...............Specification for grey iron castings
BS EN 1563 ...............Iron castings with spheroidal or nodular graphite
BS 5163 .....................Double flanged cast iron wedge gate valves for waterworks purposes
BS 5423 .....................Portable fire extinguishers
BS 6575 .....................Fire blankets
BS EN 671 .................Fixed fire fighting systems – Hose systems

NFPA 13.....................Installation of Sprinkler Systems

2 In addition to the above, all aspects of the fire fighting system shall comply with applicable
national and international codes and standards including, but not limited to, those issued by
the following organisations:

(a) Civil Defence Department

(b) National Fire Prevention Association (NFPA)
(c) British Standards (BS)
(d) Loss prevention Council Board (LPCB)

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4.2 SPRINKLER SYSTEMS

4.2.1 System Description

1 Wet pipe sprinkler systems shall employ automatic sprinklers attached to a piping system
containing water and connected to a water supply. Each pipeline in the system shall be fully
pressurised, so that water discharges immediately from sprinklers opened by a fire.

2 The system shall be designed that only those sprinklers that have been activated by heat will
discharge water.

3 The design of the sprinkler system indicated on the Project Drawings is indicative only and is
to be taken as general guide and not as final design unless specifically noted otherwise. The
final detail design (including manufacturer components) shall be fully developed by the
Contractor strictly in accordance with the requirements of the Civil Defence Department and
the rules for automatic sprinkler installations in accordance with the relevant provisions of
NFPA 13. The Contractor shall allow in his rates for components of sprinkler systems that
are required to meet requirements but are not shown on the Project Drawings.

4 The fire fighting system shall be fed from a centralised fire water storage tank located inside
the building or the basement of the building unless otherwise indicated in the Project
Documentation.

5 The sprinkler system for each building shall be complete with an automatic packaged fire
pumping station and valves, water motor alarm and gong, pressurised water main with
distribution pipework, range pipes, hangers and supports, sprinkler heads and a piped drain
system.

6 The sprinkler system shall be interconnected with the central fire alarm panel in order that
the alarm bells and zone valves in various locations can be actuated.

7 The water motor alarm and gong should consist of a simple water turbine having the shaft
connected to a rotary ball clapper mounted within a domed gong. The alarm system shall be
self-winding, adjustable recycling non-thermal type and equipped with signal retarding device
to prevent false alarms due to surges in the water system. Auxiliary pressure and flow
sensing devices shall be incorporated in the feed to the alarm gong to actuate the central fire
alarm panel.

8 A test valve shall be incorporated on a branch pipe from the alarm valve to allow operational
conditions to be simulated for test purposes. Water from the test valve shall be properly
drained.

9 The distance between sprinklers shall not exceed 3.5 m. The maximum floor area to be
covered by a single sprinkler for different hazard class are as follows:
2
(a) ordinary hazard = 12 m
2
(b) extra light hazard = 21 m
2
(c) extra high hazard = 9m

10 The distance from the walls to the end sprinklers on the branch lines shall not exceed half of
the allowable distance between sprinklers on the branch lines. The distance from the walls to
the end branch lines shall not exceed half the allowable distance between the branch
lines.

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11 The allowable distance between sprinklers on the branch lines is determined by the actual
distance between the branch lines and the permissible protection area per sprinkler.

12 The Contractor shall install an adequate quantity of additional sprinkler heads of the correct
temperature rating. The number will depend on the size of the installation and number of
sprinkler heads likely to be opened. The following figures are the minimum number of
additional sprinkler heads that should be installed:

(a) for systems not exceeding 300 sprinklers, 6 spare heads shall be installed
(b) for systems exceeding 300 sprinklers but not exceeding 1000, 12 spare heads shall
be installed
(c) for systems exceeding 1000 sprinklers, 24 spare heads shall be installed.

13 All components for sprinkler system packages should be from one single manufacturer with
an approved local agent. The Contractor shall maintain a technical representative from the
manufacturer or the local agent on site for the duration of the Contract in order to supervise
the installation. This representative shall issue a certificate upon completion of the Project
stating that the complete system has been installed, tested and commissioned in accordance
with the Project Documentation, the requirements of the NFPA and the Civil Defence
Department.

4.2.2 Sprinkler Heads

o
1 The glass bulb sprinkler heads should be of the upright pendant type and rated for 68 C.
They shall be arranged such that there is not interference with the discharge pattern and
they shall be positioned between 75 and 150 mm below ceilings.

2 The sprinklers and pipelines shall not be spaced too close together in order to prevent an
operating sprinkler from wetting, and thereby delaying the operation of, adjacent sprinklers.

3 In locations where sprinkler heads are liable to be operated or damaged by accidental blow,
they should be protected by stout metal guards. Care shall be taken to ensure that the
normal operation of the sprinkler head in the event of a fire is not impeded by such guards.

4 Sprinklers in false ceilings areas shall be the concealed or recessed type. They shall be the
two-piece design with closure and mounting plate which allows for easy installation and
removal.

5 Sprinklers in parking and hardware areas shall be the pendant or upright bulb type with a 12
o
mm diameter orifice and temperature rated to 68 C with a natural brass finishes and
sprinkler guard.

4.2.3 Sprinkler System Alarm Devices

1 The system shall be provided with alarm devices consisting of, but not limited to, the items
described in the following clauses.

4.2.4 Alarm Valve

1 Alarm valves shall be UL listed and FM approved. They shall be check type, with a rubber
faced clapper, designed for use in wet pipe systems for automatic actuation. The alarm valve
may be installed vertically or horizontally with inlet and outlet connection in accordance with
the relevant provisions of ANSI B 16.1.

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4.2.5 Basic Trip and Retarding Chamber

1 Basic trip and retarding chamber shall be UL listed and FM approved. It shall be used in
order to prevent any false alarm that may be caused by small variation in pressure. The
chamber should consist of a by-pass check valve to permit slow as well as small transient
increases in water supply pressure to be passed through to the system and held at their
highest value, without opening of the water way clapper.

4.2.6 Pressure Alarm Switches

1 Pressure alarm switches shall be UL listed and FM approved. They shall be designed to
indicate a water discharge from automatic sprinkler and the start-up or shut down of auxiliary
fire protection system equipment. The one single pole double throw snap-action switch‟s
components shall be enclosed in an oil resistant IP 22 rated enclosure.

4.2.7 Water Motor Alarms

1 Water motor alarms shall be UL listed and FM approved. They shall be hydraulically
operated outdoor alarms, designed for use with fire protection system water flow detection
devices. They shall be suitable for mounting to any type of rigid wall and to consist of an
approved “Y” strainer for use in the alarm line utilising a high energy efficient, light weight,
impeller design which can produce a very high sound pressure level. The gong, gong mount,
and water motor casing shall be made with corrosion resistant aluminium alloy. The drive
shall be of the type that does not require lubrication.

4.2.8 Stop Valves

1 Stop valves shall be UL listed and FM approved. They should be the gate valve type,
designed specifically for fire line applications, where a positive indication of the open or
closed position is necessary. The valve shall have flanged ends, an iron body and a working
pressure of 12 bar.

4.2.9 Zoning Valve

1 Zoning valves shall be UL listed and FM approved. They shall be gear operated butterfly
valves with internal or external monitor switch. They shall have a wafer or lug style body for
mounting between ANSI 125/150 flanges. They shall be rated for a 12 bar operating pressure
and have a cast iron body and an EPDM seat with bronze disc.

4.2.10 Water Flow Detectors

1 Water flow detectors shall be UL listed and FM approved and shall be designed for use with
wet pipe, automatic sprinkler systems. They shall utilise a vane type sensor to actuate two
(2) single pole double throw snap-action switches when water flows at a sustained rate of
17.5 litres or more. They shall be used where sectional water flow signals are required.

4.2.11 Drain and Test Orifice

1 The system shall incorporate a 30 mm drain and a 13 mm test orifice for flow control
inspection testing and drainage of feed mains.

4.3 WATER SUPPLY

4.3.1 General

1 Unless otherwise stated elsewhere in the Project Documentation, the water supply shall

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consist of:

(a) electric motor driven fire pump with back-up

(b) diesel motor driven fire pump with back-up

2 The capacity of the reservoirs from which fire fighting systems draw water shall be as stated
in the Project Documentation.

4.4 HOSE REELS AND HOSES

4.4.1 General

1 Hose reels and hoses shall be installed in locations as stated in the Project Documentation
unless otherwise directed by the Civil Defence Department.

2 Fire hose reel assemblies shall be provided with full operational instructions for display on or
adjacent to the hose reel.

3 The supplier shall make available an installation and maintenance manual for the hose reel.

4 All hose systems shall be such that they can be operated efficiently by one person and that
such system shall have a long service life and will not need excessive maintenance.

5 Hose reels shall be marked with the following information:

(a) suppliers name or trademark, or both

(b) year of manufacture
(c) maximum working pressure
(d) length and bore of hose
(e) nozzle diameter (marked on the nozzle)

4.4.2 Cabinets

1 Cabinets shall be fitted with a door. The door shall open approximately 180° to allow the
hose to run at freely in any direction.

2 Cabinets shall have suitable ventilation openings.

3 Cabinets shall be fitted with a lock if required by the Project Documentation. Lockable
cabinets shall be fitted with an emergency opening device.

4 To provide access for inspection and maintenance, the cabinet shall be unlockable with a
key or a special opening device. Lockable cabinets shall have provision for a security seal to
be fitted.

4.4.3 Hose Reels with Semi-Rigid Hose

1 Hose reels with semi-rigid hose shall generally comply with BS EN 671-1.

2 The nominal bore of the hose shall be 19 mm or 25 mm or 33 mm.

3 The maximum length of the hose shall not exceed 30 m.

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4 The reel shall rotate around a spindle. The reel shall consist of two wheel discs with a
maximum diameter not more than 800 mm, and inside segments or drum with a minimum
diameter not less than 200 mm for 19 mm and 25 mm hose and minimum diameter not less
than 280 mm for 33 mm hose. The discs shall be red in colour.

5 The hose shall terminate in a shut-off nozzle which shall give the following control settings:

(a) shut
(b) spray (sheet or conical) and/or jet.

6 Rotary operated nozzles shall be marked to show the direction of closing and opening.
Lever operated nozzles shall be marked to show the setting for:

(a) shut
(b) spray and/or jet.

7 A manual or automatic inlet stop valve shall be fitted to each hose reel.

8 Working, test and minimum burst pressure for hose reels shall be as given in Table 4.1,
unless otherwise stated in the Project Documentation or agreed with the Engineer.

Table 4.1 Pressure for Hose Reels

Nominal Diameter Working Pressure Test Pressure Minimum Burst
Pressure
(mm) (bar) (bar)
(bar)
19 12 18 30
25 12 18 30
33 7 10.5 17.5

Testing, performance and materials of hose reels with semi-rigid hose shall comply with the
relevant provisions of BS EN 671-1.

4.4.4 Hose Systems with Lay-flat Hose

1 Hose systems with lay-flat hose shall generally comply with BS EN 671-2.

2 The hose system shall be designed for mounting in one of the following forms:

(a) in a wall recess with cover

(b) in a cabinet in a wall recess
(c) in a cabinet for surface mounting

3 The hose support shall be one of the following types:

(a) Type 1: rotating reel

(b) Type 2: cradle with the hose double coiled
(c) Type 3: hose basket with the hose flaked

4 With Type 1 hose supports, the reel shall rotate around a spindle so that the hose can be
withdrawn freely. The inside drum shall have a minimum diameter of not less than 70 mm
and shall have a slit not less than 20 mm wide across the full diameter of the drum into which

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the folded house is located.

5 Type 1 and 3 supports, if fixed to the cabinet, shall allow a swing to a position at 90° to the
plane of the back of the cabinet. The turning axis shall be vertical.

6 The hose shall be lay-flat, with a nominal bore of 52 mm, and shall not exceed 20 m in
length.

7 A coupling shall be used to connect the hose to the valve and to the shut-off nozzle. The
coupling shall be bound to the hose by means of an even pressure over the complete
perimeter of the hose against the coupling shank.

8 The hose shall terminate in a shut-off nozzle which shall give the following control settings:

(a) shut
(b) spray (sheet or conical) and/or jet.

9 Rotary operated nozzles shall be marked to show the direction of closing and opening.
Lever operated nozzles shall be marked to show the setting for:

(a) shut
(b) (spray and/or jet.

10 A manual inlet stop valve shall be fitted to the hose system. The valve shall be screw down
or other slow-opening type. The inlet and outlet of the valve shall form an angle of not less
than 90° and not more than 135°

11 Hose assemblies shall be designed for the following pressures unless otherwise stated in the
project documentation or agreed with the Engineer:

(a) maximum working pressure shall be 12 bar

(b) test pressure shall be 24 bar
(c) minimum burst pressure shall be 42 bar

12 Testing, performance and materials of hose systems with lay-flat hose shall comply with the
relevant provisions of BS EN 671-2.

4.5 FIRE HYDRANTS

4.5.1 General

1 Fire hydrants shall be installed in locations as stated in the Project Documentation unless
otherwise directed by the Civil Defence Department.

2 A certificate shall be obtained from the manufacturer stating that the fire hydrants to be
supplied are suitable for use in Qatar.

3 Fire hydrants shall be installed in accordance with the manufacturer‟s instructions.

4.5.2 High Pressure Dry Barrel Hydrant

1 High pressure dry barrel hydrants shall come complete with removable/replaceable nozzles
and hydrant seat, top stop nut, easily repaired traffic section, nozzle section with 360°
rotation, main valve opening and bronze drain plug.

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2 Working pressure of the hydrant shall be 14 bar and the testing pressure shall be 28 bar
unless otherwise stated in the Project Documentation or agreed with the Engineer.

3 The hydrant shall comply with ASNI/AWWA C502 and shall be UL listed and FM approved.

4 Materials for the hydrants shall be as follows:

(a) nozzle section, barrels, stand pipe flanges, breakable flange, base, main valve flange,
weather-shield operating nut and bonnet all shall be ductile iron
(b) main valve disc shall be ductile iron core and fully encapsulated in EPDM rubber
(c) caps shall be cast iron
(d) coating above ground shall be fusion bonded epoxy inside and out
(e) coating below ground shall be bitumen or fusion bonded epoxy
(f) nozzles, valve seat ring, drain ring, drain bushings and plugs, stem nut, stem bushing
and thrust nut shall be bronze
(g) stop nut, cap chain, bolts and nuts shall be zinc plated steel
(h) stem rod coupling, standpipe lock rings, nozzle lock screw, lock plate, lock plate screw
and spider bolt shall be stainless steel
(i) barrel gaskets and cap gaskets shall be nitrile rubber.

5 Each hydrant shall be clearly marked, either integrally with the stated components or on a
plate of durable material securely fixed to that component, as follows:

(a) the number of the standard to which the hydrant conforms and the date of the
standard
(b) the manufacturer‟s name or trade mark
(c) the identification number (the reference used by the manufacturer allowing
identification for the supply of spares, etc).

4.5.3 Underground Fire Hydrants and Surface Box Frames and Covers

1 Underground fire hydrants and surface box frames and covers shall generally comply with
the requirements of BS 750.

2 Underground fire hydrants with wedge gate type or screw down type valves shall be suitable
for a maximum working pressure of 16 bar.

3 Fire hydrants shall be of the wedge gate type or screw-down type.

4 The wedge gate valve shall comply with the requirements of BS 5163 for PN 16 valves. The
associated duck foot bends shall be grey cast iron (CI) to BS EN 1561 Grade 250 or
spheroidal graphite cast iron (SG) to BS EN 1563.

5 Materials and testing of underground fire hydraulic shall be to BS 750. Provision shall be
made for a certificate to be made available which certifies that the hydrant has complied with
all testing requirements of BS 750.

6 Each screw-down type hydrant and each duck foot bend on a wedge gate type hydrant shall
be provided with a drain boss on the outlet side. It shall be located at the lowest practicable
point.

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7 The hydrants shall have screwed outlets. The screwed outlet shall be provided with a cap to
cover the outlet thread. It shall be securely attached to the hydrant by a chain or other
flexible device.

8 When fitted with a standard round thread outlet, the hydrant shall deliver not less than 2000
litres/minute at a constant pressure of 1.7 bar at the inlet to the hydrant.

9 The hydrant operating spindle shall be provided with a cast iron cap complying with the
requirements of BS 5163. The cap shall be securely fixed to the spindle so that it remains
fixed in position during normal use.

10 Each hydrant valve, duckfoot bend and outlet shall be clearly marked, either integrally with
the stated components or on a plate of durable material securely fixed to that component, as
follows:

(a) on wedge gate type hydrant valves:

(i) in addition to the marking requirements of BS 5163, the direction of valve
opening on the gland or upper part of the hydrant.
(b) on duckfoot bends:
(i) the number of the standard to which the hydrant conforms (i.e. BS 750) and the
date of the standard
(ii) the material designation of the body, for grey cast iron „CI‟, or for spheroidal
graphite cast iron „SG‟
(c) on screw–down type hydrants:
(i) the number of the standard to which the hydrant conforms (i.e. BS 750) and the
date of the standard
(ii) the material designation of the body, for grey cast iron „CI‟, or for spheroidal
graphite cast iron „SG‟
(iii) the direction of valve opening on the gland or upper part of the hydrant
(iv) if loose valve mark „LV‟ or „‟Loose‟
(v) the manufacturer‟s name or trade mark
(vi) the identification number (the reference used by the manufacturer allowing
identification for the supply of spares, etc)
(d) on screwed outlets:
(i) the number of the standard to which the hydrant conforms (i.e. BS 750) and the
date of the standard.

11 Class, type, manufacture, workmanship, coating and design features of surface box covers
and frames shall be in accordance with BS 750.

12 Surface box covers and frames shall be tested in accordance with the relevant provisions of
BS 750. Provision shall be made for a certificate to be made available which certifies that
samples from each production lot from which the delivery is made up comply with the
requirements of BS 750.

13 Surface box covers shall be clearly marked by having the words “FIRE HYDRANT” in letters
not less than 30 mm high, in English and Arabic, cast into the cover. The cover and frame
shall have clearly cast thereon the following;

(a) the number of the standard to which the hydrant conforms (i.e. BS 750)

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(b) the date of the standard

(c) the grade of the cover and frame.

4.6 PIPES AND FITTINGS

4.6.1 General

1 Pipes shall be UL listed and FM approved. They shall be exterior galvanized steel to ASTM A
135 with a working pressure of 14.5 bar. Couplings may be of the rolled groove type or the
mechanical locking type (push-on). Pipe end preparation for the mechanical locking type
couplings will be in accordance with the manufacturer‟s recommendations.

2 Fittings shall be UL listed and FM approved. Mechanical grooved pipe couplings and fittings
as manufactured by specialised manufacturers shall be used for all stand pipe systems.

(a) couplings shall be ductile iron to ASTM A 536, or malleable iron to ASTM A 47, with
o
chlorinated butyl gaskets suitable for an operating temperature of 95 C and heat
treated carbon steel bolts and nuts to ASTM A 183
(b) fittings shall be malleable iron to ASTM A 47 or ductile iron to ASTM A 536 with
grooved or shouldered ends
(c) flanges shall be malleable iron to ASTM A 47 or ductile iron to ASTM A 536, with a
hinged, two-piece design, suitable for opening and engaging the groves, and shall be
secured in position with a tight-fitting lock bolt. Cast iron flanges shall comply with
ANSI B.16.1 and steel flanges steel shall comply with ANSI B 16.5
(d) valves shall be grooved end design with encapsulated body and disc. Neck design
shall readily accommodate insulation. Valves shall have pressure assisted double seal
and be capable of 12 bar bubble tight shutoff. Butterfly valves shall be with gear
actuator.

4.6.2 Hangers Supports Anchors and Guide

1 The pipework shall be supported, anchored and guided in order to preclude failure or
deformation. The Contractor shall construct and install hangers, supports, anchors, guides
and accessories as necessary to the approval of the Engineer. Supports shall be designed to
support the weight of the pipe, the weight of fluid and the weight of pipe insulation.

2 Piping shall be securely fastened to the structure without over-stressing any portion of the
structure itself. Pipe supports, anchors and guides shall be secured to concrete by means of
inserts or if greater load carrying capacity is required by means of steel fishplates embedded
in the concrete.

3 Hanger shall be arrange so as to prevent transmission of vibration from piping to building

and supports.

4 Pipe hangers and supports shall be furnished complete with rods, bolts, lock, nuts, swivels
couplings, brackets and all other components and accessories to allow installation to freely
expand and contract.

5 Hangers spacing shall be such that the piping is installed without undue strains and stresses
and provision shall be made for expansion, contraction, structural settlement and water-
hammer.

6 Supports, clamps and hangers shall be made of galvanized steel, fixed with drilled plugs.

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4.7 PUMPS

4.7.1 General

1 Furnish and install where shown on the drawings one LPCB listed fire pump package
composed of both electrical and compression ignition engine driven single stage or
multistage centrifugal fire pump complete with motor, control, fittings, jockey pump and
speciality accessories necessary to complete the installation in every respect. The complete
installation shall be in accordance with the requirements of, and meet with the approval of,
the Civil Defence Department and any other authorities having jurisdiction. Centrifugal fire
pumps shall have a horizontal shaft with electric motor drive. Jockey fire pumps shall have
electric motor drives.

2 Pumps serving water supply to fire fighting system are normally driven electrically with
backup by a compression ignition engine and should always be arranged to start
automatically in the event of system operation. In addition, arrangement for starting
manually should also be installed. It is important that the electricity supply should always be
maintained to the pumping set. It is therefore essential that the electrical connections be
such that a power supply is always available for the motor when the switches for the
distribution of electrical power throughout the building are cut. Any switches on the power
feed to the motor should be clearly labelled, “FIRE PUMP MOTOR SUPPLY -NOT TO BE
SWITCHED OFF IN THE EVENT OF FIRE”. Such switches should be of the locking type
and should be kept locked on. An indicator lamp should be provided to show continuously
that full power supply is available for the motor. Any fuses in the electricity sub-circuit should
be of the high rupturing capacity (HRC) type.

4.7.2 Horizontal Fire Pumps

1 Pumps shall be horizontal fire pumps as indicated, factory assembled and tested. The
capacity and electrical characteristics shall be as detailed elsewhere in the Project
Documentation.

2 The pumps shall be capable of delivering not less than 150% of the rated flow at not less
than 65% the rated head.

3 Pumps shall be hydrostatically tested at the factory and run tested pump prior to shipment.
The hydrostatic test shall be at 150% of shut off head plus suction head but shall not less
than 1725 kPa.

4 The pump shall meet or exceed 75% efficiency at design point.

4.7.3 Construction

1 They shall have cast-iron pump casing with suction and discharge flanges machined to ANSI
B16.1 dimensions, of size and pressure rating detailed in the Project Documentation with a
red paint finish.

2 Each pump shall be capable of continuous operation without producing noise in excess of
hydraulic institute and OSHA guidelines.

3 Pump casing shall be close grain cast iron with a replaceable bronze case wear ring. The
pumps shall be of the back pull out design so that the rotating element can be removed from
the casing without disconnecting the suction or discharge piping. Full flange connections
shall be integrally cast with the volute. Pump impeller shall be of cast bronze material and
shall be statically and dynamically balanced. Impeller diameter shall be trimmed for the
specified design conditions.

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4 The pump shall be mounted on a heavy duty CI bearing frame.

5 The shaft shall be of stainless steel Grade 316 S31 to BS 970 Part 1.

6 The pump bearing shall be of the permanently sealed type designed for an L10 life of at least
50,000 hours in accordance with BS 5512 and requiring no external lubrication.

7 The pump shall be connected to drive motor by a flexible coupling capable of withstanding all
torsional, radial and axial loads.

4.7.4 Fittings

1 The Contractor shall provide the following accessory fittings:

(a) eccentric tapered suction reducer

(b) concentric tapered discharge reducer
(c) hose valve test head
(d) hose valve with caps and chains.
(e) pumps casing relief valve
(f) ball drip valve
(g) suction and discharge pressure gauges
(h) mains relief valve
(i) strainer (waste cone)

4.7.5 Electric Motors

1 Electric motors for pumps shall be horizontal, foot mounted, ball bearing, induction motor
with open drip-proof enclosure. The motor shall be mounted on the same steel base as the
pump and connected to the pump with a flexible coupling. The coupling shall be protected by a
coupling guard. The pump and motor shaft shall be aligned prior to shipment. The pump
motor current will not exceed the full load ampere rating under any conditions of pump load.
o
Pump motor shall be suitable for 415/3/50 and 2900 RPM, class “F” insulation, 50 C ambient
temperature indoor.

4.7.6 Compression Ignition Engine

1 Engine for fire pump shall be horizontal shaft, in-line, turbocharged, four stroke, liquid cooled,
compression ignition type. The motor shall be mounted on the same steel base as the pump
and connected to the pump with a flexible coupling. The coupling shall be protected with a
coupling guard. The required pump horsepower shall not exceed the rated motor horsepower
rating under any conditions of pump load. Accessories shall include 24V dc starting
batteries, charging system, dual starting contactors, fuel filters, canister type air cleaner, fuel
storage tank, cooling system heat exchangers, exhaust silencer and piping and engine
control panel. Engine accessories shall be suitable for 240 V, single-phase, 50 Hz power
supply.

4.7.7 Controller and Transfer Switch

1 The controller and transfer switch shall be LPCB listed and shall be the combined manual
and automatic, across the line type. Control equipment shall be furnished in a steel mounted,
drip proof enclosure with front operated circuit breaker and disconnect switch.

2 The circuit breaker shall be rated as approved for continued use.

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3 The pressure regulator shall have a range of 0 to 2070 kPa with pressure settings,
established at time of testing at the Site. An instantaneous recycling running period timer to
prevent to frequent automatic starting of fire pump motor, set to keep the motor in operation
for 6 minutes on automatic start, shall be interwired with the pressure regulator.

4 The controller shall be capable of interrupting a short circuit current at least equal to the
short circuit current in the controller supply circuit.

4.7.8 Alarm Panel

1 An alarm panel with visible and audible signals for indication for FIRE PUMP CURRENT
FAILURE and PUMP OPERATING shall be installed and connected to the fire pump
controller.

4.7.9 Jockey Fire Pumps

1 Jockey pumps shall be factory assembled and tested with capacities and electrical
characteristics as detailed in the Project Documentation.

2 Jockey pumps shall be constructed from with cast iron diffusers and adapter with registered
fits to maintain axial alignment. They shall have bronze enclosed impellers, bronze casing
rings, bronze base bearing, steel clamp type shaft coupling and stainless steel shaft. The
impellers shall be pinned to the shaft to prevent reverse rotation damage and to maintain
proper inter-stage lateral setting. They shall incorporate threaded suction and discharge
connections, mechanical seals and a cast-iron pump base with drain plug. They shall have a
red paint finish.

3 The motor controller shall be LPCB listed and approved for fire pump service. Control shall
include a combination type starter with fused disconnect switch, thermal over-current
protection and a hand-off automatic selector switch in the enclosure. Control shall also
include an adjustable pressure switch with gauge cock.

4 The installation shall come complete with a brass cased pressure gauge with a 100 mm dial
on the discharge pipe near jockey pump.

5 The installation shall come complete with a 20 mm relief valve on the discharge line of the
jockey pump to relieve excess pressure to floor drains.

6 The installation shall come complete with a controller sensing pipes, not less than 15 mm in
diameter with a 15 mm globe valve for testing mechanism of controller.

7 The installation shall come complete with a 85 mm diameter bronze check valves with 85
mm orifice in the clapper or ground-face unions with non-corrosive diaphragm with a 85 mm
orifice.

8 The jockey pumps and pump drives shall be installed on vibration isolators in accordance
with the manufacturer‟s recommendations.

4.7.10 Field Quality Control

1 Upon completion of installation the Contractor shall perform field acceptance tests to
demonstrate that the fire protection pumps comply with requirements of the Project
Documentation.

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4.8 WET RISERS

4.8.1 General

1 The wet riser installation shall incorporate an inlet box which shall be constructed from 1.5
mm thick galvanized sheet steel and shall be suitable for recessed mounting, with 3 mm
thick x 40 mm wide architrave. The box shall be provided with a hinged, lockable door with a
central panel glazed with wired glass and having the words “ WET RISER INLET” in 50mm
high red letters on the inside face. The box shall be finished in baked enamel inside with
prime coat outside to the required colour, and shall be supplied by an approved manufacture
of fire equipment.
2 The wet riser installation shall incorporate inlet breaching which shall be horizontal or vertical
pattern with integral spring loaded non-return valve, drain valve and blank cap. Each inlet
shall incorporate a 65 mm diameter instantaneous male couplings. The body of the
breaching piece shall be fitted in 25 mm gunmetal gate valve for drain purposes, with a plug
and chain.

3 The wet riser installation shall incorporate landing valves which shall be a spindle valve
controlled breaching with a 50 mm diameter inlet and 65 mm diameter instantaneous female
outlet with blank cap. The chain valves shall be straight or oblique pattern as required, and
shall be fixed in the closed position. Each landing valve shall be provided with a 30 m long
by 65 mm diameter fire hose lined with coated woven synthetic fire hose as well as a diffuser
branch pipe nozzle. The valve, hose and nozzle shall be accommodated in a recessed box
supported on purpose made hangers and ready for immediate use. The box shall be
generally constructed as for the inlet breaching, but with the words “WET RISER OUTLET”
in 50 mm high red letters on the inside face of the glazing.

4 The top of each dry riser shall be fitted with a 25 mm automatic air release valve, brass
construction, with internal solid rubber ball.

4.9 PORTABLE FIRE EXTINGUISHERS

4.9.1 General

1 Fire extinguishers shall conform with the relevant provisions of BS 5423.

2 Fire extinguishers shall be colour coded according to their type. The colour shall be as
follows:
(a) red - water
(b) cream - foam
(c) black - carbon dioxide
(d) blue - dry powder
(e) green - halon
3 The types of extinguishers that can be used on a fire is dependent upon the class of the fire.
The fire classes and the types of extinguishers that can be used on them is given in Table
4.1. Final selection of extinguisher type shall be in accordance with and to the approval of
the Civil Defence Department.
4 The capacity of fire extinguishers shall be as detailed in the Project Documentation.

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Table 4.2
Fire Class and Extinguisher Type

Class Nature Example Extinguisher Type

A Carbonaceous Wood, paper, textiles Water
B Flammable liquids Adhesives Dry powder
Flammable liquid stores Dry powder or foam
Bitumen boilers, petrol or Dry powder, foam, carbon dioxide
diesel powdered equipment or halon

Cooking range fires Dry powder, carbon, dioxide or fire

blanket
C Flammable gases Lpg, acetylene Carbon dioxide, dry powder or
halon
D Reactive metals Magnesium, sodium etc. Dry powder specially developed for
particular metals
E Electrical Any material where there is a Carbon dioxide, dry powder or
danger of live electricity halon

4.10 FIRE BLANKETS

4.10.1 General

1 Fire blankets shall be manufactured from woven glass fabric coated on both sides with white
silicon rubber, fully tested in accordance with BS 6575.

2 The blankets shall be supplied in white container suitable for wall mounting. Fire blankets
shall be provided in the following standard sizes:

(a) 1000 x 1000 mm

(b) 1250 x 1250 mm
(c) 1500 x 1250 mm
(d) 1800 x 1250 mm
(e) 1800 x 1800 mm

END OF PART

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5 TESTING AND COMMISSIONING .......................................................................................... 2

5.1 GENERAL ................................................................................................................................ 2
5.1.1 Scope of Work 2
5.1.2 References 2
5.1.3 Definitions 2
5.1.4 System Description 2

5.2 TESTING, START-UP AND COMMISIONING ........................................................................ 3

5.2.1 General 3

5.3 MAINTENANCE ....................................................................................................................... 3

5.3.1 General 3
5.3.2 System Spare Parts 4
5.3.3 System Test Equipment 4

5.4 TRAINING ................................................................................................................................ 5

5.4.1 General 5
5.4.2 System Supervision Training 5
5.4.3 Other Staff Training 5

5.5 SUBMITTALS........................................................................................................................... 6
5.5.1 Record Drawings 6
5.5.2 Test Records 6

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5 TESTING AND COMMISSIONING

5.1 GENERAL

5.1.1 Scope of Work

1 This Part specifies the requirement for the testing and commissioning of fire alarm systems,
fire protection systems and fire fighting systems.

2 Related Sections are as follows: Section 1 General

5.1.2 References

1 The following standards are referred to in this Part:

BS 5839......................Fire detection and alarm systems in buildings

5.1.3 Definitions

1 Test: To determine quantitative performance of systems or components thereof.

2 Adjust: To regulate the specified rates, parameters at the terminal equipment.

3 Balance: To proportion flows within the distribution system.

4 Procedure: Standardised approach and execution of sequence of work operations to yield

reproducible results.

5 Terminal: The point where the controlled fluid enters or leaves the distribution system.

6 Main: Pipe containing the system’s major fluid flow.

7 Sub-main: Pipe containing part of the system’s capacity and serving two or more branch
mains.

8 Branch Main: Pipe serving two or more terminals.

9 Branch: Pipe serving a single terminal.

5.1.4 System Description

1 The Contractor shall provide all necessary personnel and equipment required to commission
the various items of plant and equipment comprising the various systems included in the
Works.

2 Any specific requirements relating to the commissioning of each system shall be carried out
as detailed in the Project Documentation. All costs associated with providing the
requirements shall be included within the Contractor’s rates.

3 Both the installation and the commissioning activities shall be undertaken as a single
continuous operation. Upon completion of the installation activity, the Contractor shall test,
start-up, commission and hand over the system.

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5.2 TESTING, START-UP AND COMMISIONING

5.2.1 General

1 The Engineer shall be present at the tests and be at liberty to participate in them. Such
participation shall not relive the Contractor of his responsibilities for carrying out the tests
satisfactorily.

2 The Contractor shall be responsible for inspecting and testing all the components of the
system. Such components shall include, but not limited to, the following:

(a) detectors
(b) call points
(c) alarms
(d) ancillary devices
(e) fire controller equipment and associated devices
(f) auxiliary equipment
(g) operating and control software.

3 The fire controller and associated devices and modules shall be tested in accordance with
the guidelines set out in BS 5839: Pt 1 and the testing instructions provided by the
manufacturer.

4 The Contractor shall start up and operate the system for a trial period to ensure that it
operates correctly. The duration of the trial period shall be as stated in the Project
Documentation.

5 The Contractor shall test all performance of the completed system, including the software, to
ensure that it operates in accordance with the requirements of the Specification, all relevant
standards ad the manufacturer’s recommendations.

6 The Contractor shall undertake an audibility test of the alarms. The duration and performance
assessment criteria shall be determined on-site by the Engineer unless otherwise stated in
the Project Documentation.

7 The Contractor shall start-up the system, or parts thereof, and make the necessary
adjustments to ensure correct functioning.

8 The Contractor shall at his own expense carry out alterations to the system if the testing fails
to demonstrate the satisfactory nature of the system, or parts thereof.

9 The Engineer shall call for further tests when such alterations have been made and his
decision as to what constitutes a satisfactory test shall be final. The cost of all such further
testing shall be at the Contractors own expense.

5.3 MAINTENANCE

5.3.1 General

1 The Contractor shall submit complete details of all materials and labour required to maintain

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the system in correct working order. The Contractor shall also include details of the testing
procedures that need to be carried out and specify a maintenance schedule.

5.3.2 System Spare Parts

1 The Contractor shall provide a detailed list of the system spare parts that should be kept on-
site for maintenance of the system. The system spare parts which should be considered for
inclusion in the list include the following:

(a) heat detectors

(b) smoke detectors
(c) flame detectors
(d) call points
(e) alarms
(f) beacons
(g) door retention units
(h) fuses
(i) circuit breakers.

2 The quantity of each of spare part kept on-site shall be sufficient to last for the duration of the
maintenance period and in addition, for a further period of two (2) years unless otherwise
stated elsewhere in the Project Documentation.

3 Details of the system spare parts that are to be kept on-site for maintenance of the system
shall be stated in the Operations and Maintenance Manual.

4 The Contractor shall guarantee the availability of all system spares for a period of not less
than ten (10) years.

5.3.3 System Test Equipment

1 The Contractor shall provide a detailed list of system test equipment and consumables that
should be kept on-site for maintenance of the system. The system test equipment and
consumables which should be considered for inclusion in the list include the following:

(a) detector head removal tool

(b) detector base skirt removal tool
(c) call point testing tool
(d) detector test smoke canister
(e) detector test adapter
(f) aerosol dispensing tube
(g) spare log book.

2 The quantity of each of spare part kept on-site

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3 The quantity of each item of test equipment required and the quantity of each type of
consumables required shall be sufficient to last for the duration of the maintenance period
and in addition, for a further period of two (2) years unless otherwise stated elsewhere in the
Project Documentation.

4 Details of the system test equipment and consumables that are to be kept on-site for
maintenance of the system shall be stated in the Operations and Maintenance Manual

5 The Contractor shall guarantee the availability of all system test equipment and consumables
for a period of not less than ten (10) years.

5.4 TRAINING

5.4.1 General

1 The Contractor shall provide details of the training required by personnel to operate and
maintain the fire detection and alarm system.

2 The Contractor shall provide two levels of training:

(a) system supervision training

(b) other staff training.

5.4.2 System Supervision Training

1 System supervision training shall include technical training sessions and on-site training
given during installation and commissioning of the system.

2 An experienced and competent engineer familiar with the fire system being installed shall
give system supervision training.

3 The scope of training provided shall depend on the type, size and complexity of the system.

4 The Contractor shall initially provided technical training in all aspects of the system. The
trainee shall then be given full instructions in the use, operation and maintenance of the
system. This shall include instruction in the procedures to be followed in the event of fire and
false alarms, routine maintenance and testing procedures, and how to keep the Log Book.

5.4.3 Other Staff Training

1 Other staff training shall include training sessions provided on-site after hand over of the
system.

2 An experienced and competent engineer familiar with the fire system installed shall give the
training sessions.

3 The scope of training provided shall include full operating instructions in the use of the fire
system. This shall include instruction in the procedures to be followed in the event of fire and
false alarms.

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5.5 SUBMITTALS

5.5.1 Record Drawings

1 The Contractor shall submit record drawings of installed fire alarm systems, fire protection
systems, fire fighting systems including equipment data in accordance with the relevant
provisions of Section 1, General.

2 Notwithstanding the foregoing, the drawings shall include but not be limited to the following:

(a) arrangement drawings of each complete installation to a scale of not less than 1:50
(b) outline dimensioned drawings of each of the principal items of plant; each be
accompanied by a schedule with full particulars of fittings, instruments and
components
(c) sectional drawings of each of the major items of plant with parts named and
numbered to facilitate maintenance and overhauls; these drawings shall also show the
type of fit and running clearance for fitted and running parts and with them shall be
included such detailed workshop drawings as may be necessary for the manufacture
of replacement components during the working lifetime of the plant
(d) electrical, hydraulic and operational diagrams as may be necessary.

5.5.2 Test Records

1 The format of recording tests shall be agreed with the Engineer. The Engineer shall be
present at the tests and be at liberty to participate in them.

2 The Contractor shall make all records during the test and on completion thereof, shall provide
the Engineer with a Test Report.

3 Test Reports shall be arranged and collated in a logical order. This data shall form a
permanent record to be used as the basis for required future testing, adjusting and
commissioning.

4 Test Records shall comply with the relevant provisions of Section 1, General.

END OF PART

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PREFERRED VENDORS LIST-FIREFIGHTING

SI. Description Brand Name Country of Local Agent

No. Origin
1 Fire Pump set 1 A-C Fire pump USA Faisal Jassim Trading
(UL,FM) -ITT P.O. Box 6516
Tel: 44685199
Fax: 44685145
2 PEERLESS USA Naffco qatar
P.O.Box-22428
Tel: 44694168
Fax: 44694174
3 FAIRBANKS USA International Gulf Trdg co
MORSE P.O. Box 6572
Tel: 44416018
Fax: 44429151
4 Aurora USA

5 Armstrong USA

6 NAFFCO UAE

2 (Electric Engine for fire pump 1 WEG USA

UL,FM)

2 TECO USA

3 US MOTOR USA

3 (Diesel Engine for fire pump 1 Clark USA

UL,FM)

2 Fire Driver USA

3 Cummins USA

4 Controller 1 Tormatech USA

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2 NAFFCO UAE

3 FIRE TROL USA

4 JOSLEN USA
CLARK

5 Portable Fire Extinguishers 1 Naffco UAE Naffco qatar

P.O.Box-22428
Tel: 44694168
Fax: 44694174
2 Kidde U.K Trags Trading
P.O Box: 1884
Tel: 44432212
Fax: 44422255
3 Chubb U.K International Gulf Trdg co
P.O. Box 6572
Tel: 44416018
Fax: 44429151
4 SRI Malaysia Firelink w.l.l
P.O Box: 10751
Tel:44995040
Fax:44995045
5 SFFECO KSA International Co. for Safety &
Fire Equip.
P.O. Bo-3740
Tel: 44326664
Fax: 44444920
6 Moyne Ireland Firelink w.l.l
P.O Box: 10751
Tel:44995040
Fax:44995045
6 Fire Cabinet, Nozzle, Hose 1 Tyco UK
reels, Landing Valve & Other
Wet Riser Component ( UL,
FM, Kite mark LPCB)
2 Augus UK

3 Viking UK

4 Grinnel UK

5 Naffco UAE

6 Chubb UK

7 Kidde UK

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8 SFFECO KSA

4 Fireman’s Breech Inlet 1 SRI Malaysia Firelink w.l.l

Assembly( Flush –Type-UL,FM P.O Box: 10751
) Tel:44995040
Fax:44995045
2 Bristol UAE Gulf Lights
P.O.Box-2071
Tel: 44699683
Fax: 44699686
3 SFFECO KSA International Co. for Safety
& Fire Equip.
P.O. Bo-3740
Tel: 44326664
Fax: 44444920
4 NAFFCO UAE

5 AFAC USA

6 Guardian Fire USA

Department

5 Sprinkler System 1 Ansul USA International House for

Trading & Services
P.O. Box-13407
Tel: 44415951
Fax: 44419760
2 Central-Tyco USA Firelink w.l.l
P.O Box: 10751
Tel:44995040
Fax:44995045
3 CHUBB UK International Gulf Trading
Co.
P.O.Box-6872
Tel: 44327205
Fax: 44328751
4 VIKING USA International house trading
& contracting
P.O 13047
Tel: 44415451
Fax: 44419760
6 Fire Hydrants 1 Bristol UAE Gulf Lights
P.O.Box-2071
Tel: 44699683
Fax: 44699686

2 SFFECO KSA International Co. for Safety

& Fire Equip.
P.O. Bo-3740
Tel: 44326664
Fax: 44444920

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3 Angus U.K International house trading

& contracting
P.O 13047
Tel: 44415451
Fax: 44419760
4 Moyne Roberts Ireland Kbas Trading
P.O Box: 22599
Tel: 4685747
Fax: 4685763
5 Norsen U.K Trags Trading
P.O Box: 1884
Tel: 44432212
Fax: 44422255
6 SRI Malaysia Firelink w.l.l
P.O Box: 10751
Tel:44995040
Fax:44995045
7 VIKING U.S.A International house trading
& contracting
P.O 13047
Tel: 44415451
Fax: 44419760
8 KIDDIE UK Trags Trading
P.O Box: 1884
Tel: 44432212
Fax: 44422255
7 Check Valves, Bronze OS7Y 1 Tyco USA International house for
Gate Valves ,Iron OS& Y trading & contracting
Gate Valves, Butterfly Valves, P.O 13047
Ball valves, Alarm Valves and Tel: 44415451
automatic drain valves Fax: 44419760
2 Nibco USA Kbas Trading
P.O Box: 22599
Tel: 44685747
Fax: 44685763
3 Shield USA

8 Fire Blankets 1 Bristol UAE Gulf Lights

P.O.Box-2071
Tel: 44699683
Fax: 44699686
2 SFFECO KSA International Co. for Safety
& Fire Equip.
P.O. Bo-3740
Tel: 44326664
Fax: 44444920
3 NAFFCO UAE

4 DREDALA

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9 Alarm check valve/ Zone 1 Viking USA International house trading

control valve assembly & contracting
P.O 13047
Tel: 44415451
Fax: 44419760
2 Central-Tyco USA Firelink w.l.l
P.O Box: 10751
Tel:44995040
Fax:44995045

3 Shield USA Trags Trading

P.O Box: 1884
Tel: 44432212
Fax: 44422255

10 Branch outlet Fitting( UL,FM) 1 TYCO USA

2 Victaulic USA

3 Shield USA

11 Sprinkler pipes & fitting 1 Econosto Oman Firelink w.l.l

P.O Box: 10751
Tel:44995040
Fax:44995045
2 Surya India Firelink w.l.l
P.O Box: 10751
Tel:44995040
Fax:44995045
12 Sprinkler Inspector’s Test 1 Tyco USA
fittings ( UL,FM)

2 VIKING USA

13 Water –Flow Indicator 1 Watt USA

( UL,FM)

2 Potter Roemer USA

3 McDonnell & USA

Miller

15 Water-Motor-Operated Alarm( 1 Tyco USA

UL,FM)

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2 Shield USA

3 Victaulic USA

16 Valve Supervisory Switches 1 Fire-Lite Alarm USA

( FM,UL)

2 Kennedy Valve USA

3 Potter Eletric USA

Signal

17 Pressure Gauge( UL,FM) 1 Wika USA

2 Shield USA

3 Ametek USA

NOTE:

1) All equipment shall be from the original manufacturer, assembled units under license are not
acceptable.

Any alternative proposal shall be submitted with product comparison and sample for

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Section 28 IRRIGATION
Part 2 Irrigation Systems

Addendum

Preferred Vendors List

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2 IRRIGATION SYSTEM 2
2.1. GENERAL 2
2.1.1. Description 2
2.1.2. Scope Of Work 2
2.1.3. Quality Assurance 3
2.1.4. References 3
2.1.5. Submittals 3
5
2.2. PRODUCTS
2.2.1. Pipe And Fittings 5
2.2.2. Application Devices 6
12
2.3. EXECUTIONS
2.3.1 Protection 12
2.3.2 Performance 13
2.3.3 Inspection 13
2.3.4 Installation 13
2.3.5 System Testing 16
2.3.6 Flushing 17
2.3.7 Testing and commissioning 18

2.4. OPERATION AND MAINTENANCE 18

2.4.1 Maintenance Program 18
2.4.2 Operational Personnel and Manual 19
2.4.3 Operation Program 19
20
2.5. SPARE PARTS
2.5.1 General 20

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2. IRRIGATION SYSTEM

2.1. GENERAL

2.1.1. Description
1. The purpose of this project is to supply, install and commission an automated irrigation
system with all related components for the “Project” consisting of field remote control valves,
control wires, filter, integrated dripper lines, drippers, flush valves, sprinklers, bubblers and
control system.

2.1.2. Scope of Work

1. The scope of work shall be read in conjunction with the contract material specifications,
contract drawings, bill of quantities, contract documents and installation details and it
includes but not limited to the following:
(a) The contractor shall prepare the shop drawings showing but not limited to The Main
line, Laterals, solenoid valves, control wires route and numbers, Irrigation Controllers,
integrated dripper lines, on line drippers, Bubblers and flush valves.
(b) All equipment and materials shall be supplied, installed, tested and commissioned by
an irrigation specialist employed by the contractor and approved by the engineer.
(c) The contractor shall submit for Engineer’s approval the technical information and
samples of the material he intends to use which should be in accordance with the
material specifications of this project.
(d) It shall be the responsibility of the contractor specialist to ensure that the plant and
equipment supplied by them produces the desired results. The Specialist shall include
all equipment, materials, accessories, finishing materials etc., required so as to have a
complete functional system. This shall include all items of a minor nature necessary to
complete the installation and usually included in similar work whether or not
specifically mentioned in the contract documents.
(e) All materials and workmanship not fully specified herein or covered by QCS, BS or
BSCP or approved alternative shall be of such a kind as is used in first class work and
is suitable for the climatic conditions of the state of Qatar.
(f) The complete irrigation system for each site shall be fine tuned to efficiently and
evenly irrigate all areas in accordance with the engineered design and shall be
complete in every respect. The system shall be set in operation and adjusted to the
satisfaction of the Engineer.
(g) All irrigation equipment and components shall be the product of a manufacturer having
a local representative Engineer capable of advising and assisting in making the
required adjustments to the system.
(h) The contractor shall commission the irrigation system upon completing the work and
then shall be handed over.

(i) The contractor and upon completing the work shall provide the Engineer with four
original sets of As-Built drawings accurately reflecting the executed works and
installation details.
(j) The contractor shall upon completing the works provide the Engineer with detailed
Operation and Maintenance Manuals (With applicable Arabic translations) in four
originals. The manuals shall include but not limited to; complete and marked literature
of all products used on the project and its reordering part numbers. It shall also include
a list of the recommended spare parts for a period of 5 years. It shall include original
color print and softcopy of the As Built drawings.
(k) The Engineer prior to issuing the Project Handing over Certificate shall approve the
As-Built Drawings and the Operation & maintenance Manual.

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(l) The details pertaining to this scope of work are herein Appendix A and Appendix B.

The Contractor shall execute his work as per the details in Appendix A and Appendix
B.

2.1.3. Quality Assurance

1. Manufacturers: Firms regularly engaged in the manufacture of irrigation equipment, control
systems, pumps, pipes and fittings whose products have been in satisfactory use in similar
service for not less than 5 years and backed by a recognized local agent or to the approval
of the engineer.
2. Installers: Firms regularly engaged in the installation of irrigation works of a similar quality
and scope as this project and to be approved by the Engineer.

2.1.4. References
ASTM D2241........ Specifications for Polyvinyl Chloride (PVC) pressure rated pipes.
ASTM B3 .............. Bare soft and annealed copper un-insulated uncoated 14-4 AWG solid
wire.
ASTM B8 .............. Class B concentric-lay-stranded copper conductors
ASTM D2466........ Specification for uPVC pipe Fitting Schedule 40.
ASTM D2467........ Specification for uPVC pipe Fitting Schedule 80
ASTM D1248........ Standard specification for polyethylene plastic
ASTM D1785........ American standard for testing of material for PVC pipes.
ASTM D2219........ Specification for PVC insulation for wire and cable
BS 1780................ Specification for bourdon tube pressure and vacuum gauges.
BS 3505................ Specification for uPVC pressure pipes for cold potable water.
BS 4346 ............... Joints and fittings for use with uPVC pressure pipes.
BS 5150................ Specification for cast iron wedge and double disk gate valves for general
purposes.
BS 5154 ............... Specification for copper alloy globe, globe stop and check, check and
gate valves for general purposes.
BS 8010 ............... Code of practice for pipelines.
Din 8061 ............... Confirming to German Standards Din 8061.
Din 8062 ............... uPVC pipes Dimensions According to German Standard.
Din 8063 ............... Pipe joint Assembly and fitting for uPVC pressure pipe.
SASO 14&15 ........ Conforming to Saudi Pipes Standards

2.1.5. Submittals
1. Prior to start of any work at site the contractor has to approach all Service Authorities in
Qatar to get their no objection for the work included in this contract and record drawings for
their existing services. Copy of these drawings and no objection certificate shall be submitted
to the Engineer before starting the actual work at site.
2. Shop Drawings - The contractor shall submit shop drawings in 3 sets of black hardcopies,
one set colored hardcopy and a soft copy, which to be approved by the Engineer
representative prior to commencing installation work. The shop drawings shall show but not
limited to valves, control wires route and numbers, controllers’ location and flow balancing.

3. Please note that the contractor shall prepare detail survey of existing levels in the contract
area.
4. Trial pits should be taken at every 50 meter interval. All the existing services shall be marked
in reference to the road edge & building line along with these depths from existing ground
level & the proposed Landscape finish level. Contractor to check availability of all the existing
ducts that are marked on the tender drawings. Contractor to propose the route of Irrigation
piping based on this information. All this information regarding trial pits, existing and
proposed levels, availability of existing ducts shall be made available to the Engineer within
mobilization period of the contract. All information shall be made available on hardcopy & in
Digital format to the Engineer as it is required for adjusting landscape and pipes/services
alignment.

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5. Any delay to provide the above-mentioned information regarding trial trenches, existing
services & levels which affect the progress of works shall be the responsibility of the
Contractor
6. The successful contractor shall submit shop drawings, for approval by the Engineer, for the
following:
(a) In case of any conflict between contract drawings and any existing or future services
which may necessitate re-routing the proposed irrigation Main or laterals, the
contractor has to prepare the shop drawings accordingly and submit it to the Engineer
for approval. This shall be considered as integral part of the contract.
(b) The Pump /Filtration Chamber mechanical, electrical and civil works shop drawings.
Necessary modifications to the existing feeding chambers (civil and mechanical).
Valve chambers including valves, pipe works and civil works. Electrical control
equipment with circuit diagrams
(c) Details of mainline, Profile drawings for Mainline, lateral pipes and other typical
connections
(d) Wiring diagrams including conduits, pull boxes, sizing and calculations to verify that
cable sizing is in accordance with Kahramaa regulations and equipment manufacturers
recommendations
(e) Electrical power and control wiring diagrams for irrigation controllers, field wiring and
grounding.
(f) Layout plans for drip line layout.
(g) Layout plans for Sprayer and Sprinkler layouts
(h) Detail of valve chambers and any modification to the existing feeding chambers
(i) The approval shall not relieve the Contractor of any of his responsibility under the
contract for successful completion of the work
7. Products
(a) The contractor shall submit for Engineer’s approval prior to commencing installation
works; the products he intends to use with all technical details and literature in
accordance with the specifications below. Material submittal shall include all irrigation
system component, fitting and accessories including but not limited to warning tape, PVC
cement and cleaner, wires, Teflon tape. A sample board shall be submitted for approval.
A material submittal list must be arranged by the contractor as below (Table 1):
Table 1: Material Submittal
List

Item Description Abbreviations

1 Air Release Valve AP Approved

2 Screen Filter AN Approved As Noted
3 Polyethylene In Line Drip AI Additional Information

4 On Line Drippers NA Not Approved

5 Professional Landscape Drip Line(PLD) SR Sample Required
with in-line Drip emitters.

6 Flush valves GR Guarantee Required

7 Central Irrigation System NS Not Submitted
8 Irrigation Controller TR Test Required
9 Weather Station OT Others

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10 Irrigation Control Wire

11 Flow Meter
12 Solenoid Valves

13 Quick Coupling Valve

14 Gate Valve

15 Check Valve
16 Valve Boxes
17 PVC Pipes
18 PVC Fittings
19 PVC Cement
20 PVC Cleaner
21 DC Aluminum Cover
22 Shop Drawing Submittal
23 Flow Balance Submittal

24 Irrigation Pumps & Panels

25 Water Tanks
26
27
28

(b) Operation and Maintenance Manuals-The contractor shall submit 4 sets of

black hardcopies, one set colored hardcopy and a soft copy of detailed Operation &
Maintenance Manual and one softcopy with equipment reordering codes
and literature.

(c) As-Built Drawings- The contractor shall submit 3 sets of black hardcopies, one set
colored hardcopy and a soft copy of the complete project as-built drawings reflecting
the actual site installation.

(d) Calculation: The contractor shall submit a friction loss calculation for the irrigation
system installed including a full system flow balance calculation.

(e) Guarantees: The contractor shall submit manufacturer and supplier material
guarantees for materials submittal as specified in the material specification below.

(f) Origen catalogue cuts, diagrams, samples, drawings and such other data may be
required to demonstrate compliance with the specification.

2.2. PRODUCTS
2.2.1. Pipe And Fittings

1. All primary distribution pipe work shall be non plasticized Polyvinyl Chloride (uPVC) class E
or equivalent for all lateral and mainlines.

2. PVC pipes shall be manufactured according to ASTM D1785 or equivalent.

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3. All primary distribution pipe fittings shall be solvent welded uPVC 15 bars or equivalent.

4. All non plasticized Polyvinyl Chloride Pipe fittings shall be manufactured to ASTM D1785 or
Equivalent and class E or equivalent.

5. Polyethylene pipes and fittings:

6. Flexible Pipes for irrigation on line drippers shall be in the required sizes as shown on the
drawings and extruded from linear low density polyethylene version raw material. Pipes shall
be resistant to algae and ultraviolet deterioration with Carbon Black content not less than
2.25%.

7. Pipes and fittings manufacturer should be ISO certified with 5 years manufacturing
experience, test certificate from reputable labs should be available prior to material ordering.
2.2.2. Application Devices

1. Spray Pop-Up Sprinkler (NOT APPLICABLE)

2. Roto r Pop-Up Sprinkler (NOT APPLICABLE)

3. Integrated Dripper Line

(a) The dripper line shall consist of on ultra violet resistant low density Linear polyethylene
tube with internal pressure compensating continuously self cleaning integral flat or
cylindrical drippers welded to the inside of wall of the tube at the specified spacing as
an integral part of the tubing assembly.

(b) The tube shall have a 15 to 17 mm outside diameter.

(c) The dripper shall be constructed of plastic with a hard plastic diaphragm retainer and a
self cleaning diaphragm extending the full length of the dripper. It shall have an inlet
filter raised from the wall of the tubing. It shall have the ability to independently
regulate discharge rates with a constant flow at an inlet pressure of 7-60 psi.

(d) The dripper discharge shall be as specified on the design drawings utilizing a
combination turbulent flow/reduced pressure compensation cell mechanism and a
diaphragm to maintain uniform discharge rates. It shall also be continuously self-
cleaning during operation and under pressure.

(e) The dripper flow versus pressure shall be tested by an independent reputable
organization, and shall have available reports to be presented upon request by the
Engineer.

(f) The dripper flow shall not be affected by temperature up to 60 degrees Celsius and
shall not have a spike at start up.

(g) The filtration requirement of the dripper shall be a maximum of 120 mesh.

(h) The dripper line shall have a 2 years guarantee against solar radiation and 1 year
manufacturer and supplier warranty against manufacturing defects.

4. On- Line Dripper For Irregularly Layed-Out Shrubs

(a) Single outlet, pressure compensating drippers are acceptable.

(b) Pressure compensating design deliver uniform flow at a pressure variable from 15 to
50 psi.

(c) Made of durable plastic construction and UV resistant.

(d) Diaphragm resistant to chemicals.

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(e) Built in self flushing action

(f) Available in self piercing inlet barb.

(g) The flow is as per design drawing.

(h) On-line dripper shall be extended with a distribution component made of a UV

resistant polyethylene resin materials, 4 mm inside diameter.

(i) Polyethylene and UV resistant pipe 16 mm is used to insert in the on line drippers,
this pipe is laid underground at 5 cm depth including the online dripper, only the
distribution component is extended out the ground to a maximum of 25 cm length.

(j) The dripper line shall have a 2 years guarantee against solar radiation and 1 year
manufacturer and supplier warranty against manufacturing defects.

5. Bubblers

(a) The bubbler shall be of the pressure compensating type having a fixed flow under a
pressure range of 20 to 70 PSI. It shall be constructed of corrosion and UV resistant
plastic material.

(b) The bubbler shall have an integral flow bushing to maintain a constant flow at different
pressure range.
(c) The bubbler shall have a plastic screen filter to protect it from debris that could be
available in the water.
(d) The bubbler shall be available in 0.25 to 2.0 GPM flow rates.

(e) Bubblers flow and numbers are as per design drawing details and two bubblers are
needed for palm trees and one bubbler for trees.

(f) The bubbler shall carry a two years manufacturer and supplier replacement warranty.

6. Electrical Control Solenoid Valves

(a) The electrical control solenoid valves shall be of the electronically actuated, diaphragm
operated.

(b) The valve’s body and bonnet shall be molded of non-corrodible, glass filled nylon,
rated at an operating pressure of 200 PSI. The body of the valve shall have brass
inserts, with through holes, which will accept the bonnet Stainless steel bolts.

(c) The valve shall be equipped with an internal filter as well with a self-cleaning metering
rod, so that only clean water can enter the solenoid chamber. A filter cleaning system,
that continuously cleans the filter when the valve is operating, shall be available.

(d) The valve shall be equipped with a flow control mechanism with handle, which
regulates the flow from full on to completely off. It shall have an accurate set pressure
regulator, to keep the downstream pressure constant after setting it. The regulator
shall be of the top dial model with clearly shown pressure values in bars and PSI. It
shall regulate the flow at a pressure range of 20 to 100 PSI.

(e) The valve shall be available in 1, 1.5, 2 and 3” inch sizes and it shall have a BSP
female thread inlet and outlet.

(f) The valve shall be equipped with automatic self-cleaning system for filter.

(g) The valve sizes, number and flow rate are shown on the design drawings.

(h) The valve shall carry a 3 years manufacturer and supplier exchange warranty.

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7. Quick Coupling Valves

(a) The Valve shall be operated by insertion of a compatible hollow coupler key.

(b) The valve shall be operated by a 90º turn in clockwise direction with reverse turn for
closure and be capable of 360-swivel action.

(c) The valves shall be of the low-pressure loss type.

(d) The Valve Body shall be made from brass material and have the one or two-section
type with removable upper body. It shall be supplied with spring loaded locking cover
made from thermoplastic rubber. The cover spring shall be of stainless steel material.

(e) The valve size is 1”.

(f) The valve shall carry a 3 years manufacturer and supplier exchange warranty.

8. Gate Valves

(a) Gate valves shall be designed for a working pressure of not less than 10 bars and
water operating temperature of 45° C.

(b) Valves shall be the same size as the incoming line size with a clear waterway equal to
the full nominal diameter of the valves and shall be opened by turning
counterclockwise.
(c) The operating nut or wheel shall have an arrow cast in valve indicating the direction of
opening.

(d) Valves smaller than 4” shall be all bronze or brass conforming to BS or ASTM with
screwed end connections. Valves 4” and larger shall be cast iron body, and shall
conform to BS or ASTM with flange end connections.

(e) The valve shall carry a five years manufacturer and supplier exchange warranty.

(f) PVC valves up to 4" diameter, with working pressure of not less than 10 bars and
watering temperature of 50° C are acceptable with 3 years manufacturer and supplier
exchange warranty.

9. Air/Vacuum Release Valves Specifications

(a) Air relief valves shall be (1”-3”) size as shown on the Drawings and shall be of the
kinetic/automatic type that will automatically release air when the lines are being filled
with water and when air entrapment occurs while the system is working.

(b) The Valves shall be of plastic or brass male base.

(c) The body of the valve shall be constructed of heavy duty plastic or 100% corrosion
resistant materials.

(d) The valve working components shall be constructed of 100% corrosion resistant
materials to ensure maximum life and minimum water loss due to leaks.

(e) The Valve shall remain open even when pipeline air pressure reaches (3-10) psi.

(f) The air release valve shall employ rolling seal mechanism made of EPDM.

(g) The valve shall carry a 3 years exchange warranty.

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10. Check Valves

(a) The valve shall be having constructed of Brass, Cast Iron, Ductile Iron and stainless
steel materials, 100% non-corrosive.

(b) The valve shall allow flow in one direction by the action of a spring loaded flap which
closes against a rubber seal.

(c) The spring and the flap shall be connected via a moment arm in order to ensure that
the spring pressure is maximum when the valve is closed.

(d) The valve shall have a pressure rating of 16 bars

(e) The valve shall have an external position indicator.

(f) The valve shall be available in 3”, 4”, and 6”size.

(g) The valve shall carry a 3 years exchange warranty.

11. Valve Boxes

(a) The valve boxes shall have enclosures, which are injected molded plastic or HDPE
with ultra violet additives. It shall be light in weight with reduced side angles and
increased break resistance.

(b) The valve box shall be non-conductive or sparking.

(c) The valve boxes shall be available in sizes to fit the solenoid valve assembly including
the union fittings and allow for easy removal of valves for maintenance.

(d) The valve box should have a two years replacement warranty against buckling and
five years against cracking. All valve boxes should be name tagged with aluminum or
brass name tags, placed inside the valve box and riveted to the outside box cover.
The name tag size should be 2" by 3" and 2mm thick.

12. Filters

(a) Use a 3” disc filter on all distribution chambers with a disc filters of 120 mesh size of
0.10 mm.

(b) Disc filters shall be corrosion resistant, with minimum pressure and high particle
retention filter area.

(c) Filters shall handle a pressure of 8 bars minimum.

(d) The filter shall carry a 1 year manufacturer and 2 years supplier warranty.

13. Controllers

(a) The controllers should be capable of running the irrigation system as scheduled; it
should have a seasonal adjustment option, 4 programs, running 2 solenoid valves at
the same time using one station.

(b) The controllers should have a stainless-steel or plastic pedestal and should be
weatherproof and resists the elements.

(c) The number of stations for each controller should be equal to the total of existing
stations for all used solenoid valves, the extra spare wires for future use and wires for
future flow meter and master gate valves at each chamber.

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(d) Additional 2 numbers of 10 gauge wires should be laid as provisional for future
installation of flow sensor and master gate valves at each distribution chamber.

(e) The controller should have 2 years minimum warranty against malfunctioning and 10
years available software upgrade. Irrigation schedule should laminated and placed in
each controller cabinet.

14. Power Source

(a) The contractor shall be responsible for providing the electrical power source to the
controller from any nearby distribution panel board.

(b) The location of the controllers should not be changed and the power sourcing should
be done to suit that condition. All coordination and permits should be arranged by the
contract and at his own expense.

15. Trench Marker Tape

(a) Furnish and install trench marker above all buried irrigation pressure Pipelines and
electric power cable.
(b) Provide tape manufactured from low density polyethylene material or equivalent
approved material.
(c) Provide tape 150mm wide and a minimum thickness of 100 micron.
(d) Print tape in both Arabic and English. CAUTION: IRRIGATION LINE BURIED BELOW /
ELECTRIC CABLE BURIED BELOW (or) equivalent text that is applicable for usage.
16. Water Wire Connector & Sealant

(a) Wire connector shall be waterproof underground wire connections.

(b) Splices of wire shall be accomplished using 3M or equivalent epoxy type compound.
17. Power Cable For Irrigation Controller And Control Panel

(a) Selection of power cable for irrigation controller and panel as per the manufacturer
recommendation.
(b) The detail of Voltage, Ampere and size of cable as per the manufacturer
recommendation and technical data.
(c) The cable shall carry a 1 year manufacturer and 2 years supplier warranty.
18. Irrigation Control Cables

(a) Electrical materials for irrigation purposes shall comply with the relevant provisions of
Section 21, Electrical Works.

(b) Irrigation control cables shall be used between the solenoid valves and the irrigation
controllers. The cables shall be of the single conductor type UF and they shall be
engineered for direct burial use. The common wire shall be gauge 12 and the control
wire shall be gauge 14.

(c) For master control valves and flow meter wires use 10 gauge wires.

(d) The wires shall be of the solid or stranded construction with soft bare copper
conductor. They shall have extra heavy thickness of special polyvinyl chloride
insulation highly resistant to the saline, acid or alkaline contaminants.

(e) The copper conductors of the wires shall meet the requirements of ASTM B-3, B-8.

(f) The thermoplastic insulation shall meet U L standard 493 and 83. All irrigation wires
shall have surface printing on insulation.
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19. Irrigation Pump

(a) The irrigation pumping system shall consist of a main irrigation pump, a booster pump.
The size of the pump is as specified in each project specification.

(b) The irrigation pump should have a variable frequency drive that controls and keep
pressure constant with a variable drive system.

(c) The pump should be made of the best materials and made by a reputable
manufacturer.

(d) The operation and maintenance schedule should be submitted.

(e) The minimum replacement warranty for the pump should be 2 years if defect occurs
more than twice per year.

(f) The supplier should submit a guarantee of 2 days maximum repair time for the pump
including availability of spare parts.

(g) The pump warranty should cover all parts of the pumping system including the control
board piping and check valve to a minimum of five years against manufacturer
defects.

20. Flow Sensor

(a) The flow meter shall be of an Electromagnetic insertion type, operated with 24 V direct
current.

(b) It shall be compatible with the irrigation control system. And Capable of reading flow
from 0 to 25% higher than the maximum flow in the largest mainline pipe.

(c) Frequency of sampling and reading flow shall be selectable from 10 times per second
to one time in 10 minutes or (As per manufacture requirements).

(d) The wire of flow sensor should be minimum 20 AWG.

(e) The warranty shall include the flow meter and the signal converter and should be for 5
years suppliers’ warranty.

21. Master Control Valve

(a) The master control valve should be cast iron compatible with the existing controller
and operated with 24 V direct Electrical current.

(b) The warranty should be for 3 years suppliers warranty and 1 years minimum
manufacturer warranty.

(c) The local supplier should be an existing Qatari firm with minimum 5 years of
operational history.

22. Miscellaneous

(a) Irrigation Drip Line Stakes: Stakes for securing flexible pipes shall be heat resistant
plastic.
(b) Keys: the Contractor shall provide Keys for all valves, controller cabinets, boxes, quick
couplers, etc. The number of keys to be provided to the Engineer for each type of
fitting shall be six (6).
(c) Hoses: Hoses, quick couplers and appropriate connectors shall be provided by the
Contractor for quick coupling valves, drain down points, etc. The number of

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hoses/connectors shall be: 1 (one as sample) the hose should be fifty (50) meters of
industrial weight double nylon cord reinforcement or double tire cord reinforced of an
untangling and high pressure type.
(d) Quick couplers Swivel end unit: One (1) quick coupler with swivel end unit shall be
provided for each installed eight (8) quick coupling valves.
(e) Distribution chamber: Should be made of reinforced concrete as specified and
approved by the drainage department, it should allow for easy installation and removal
of component inside and should be water proofed with waterproofing paints and
membrane. The membrane should be protected with a protection board.
(f) Chamber Aluminum cover: The aluminum cover should be made to fit the new
chambers shown on the project details drawing and it should have the following:
(i) Hinged aluminum access cover shall be obtained from an approved
experienced manufacturer and shall be fabricated from checker-plate. The
cover shall be capable of withstanding a load of 750 kg/m2 without deflecting
more than 1% of the span, and without damage or permanent deflection.
(ii) Hinges shall not stand proud of the cover, and sealed lifting eyes shall be
provided completed with two lifting keys for each cover.
(iii) Covers should open to approximately 10 degree past the vertical, and stays
should be provided to hold the cover in this position.
(iv) All joints shall be welded/soldered in an inert atmosphere.
(v) The faces of the frame which will come into contact with the cement mortar or
concrete shall be painted with two coats of bituminous paint before installation
of the frame.
23. Connection to Existing Services

(a) The Contractor shall co-ordinate and provide water and electrical connection points as
follows:
(i) connections to water sources
(ii) make all connections to electrical panels or transformers
(b) The Contractor shall be responsible for making connections to existing piping, valves,
conduit, and appurtenances utilising proper adaptation tools and procedures.

2.3. EXECUTIONS
2.3.1 Protection
1. All materials shall be handled and shipped in accordance with the relevant provisions of Part 9
of Section 1, General.
2. All materials shall be shipped or otherwise conveyed in such a manner as to assure no
damage. All boxes shall be securely sealed and clearly marked with the name of the
manufacturer. All pipes shall be protected from crimping, crushing and splitting. All non-
metallic system components shall be protected from sunlight exposure as per the
manufacturer's recommendations.
3. Work and materials shall be protected from damage during storage, handling and
construction. Particularly, non-metallic pipes and fittings shall be protected from direct
sunlight during storage. Facilities of the necessary dimensions shall be provided and
maintained for storage of all non-metallic irrigation materials in their entirety. All non-metallic
materials shall be handled carefully and stored under cover to avoid damage. Pipes that
have been damaged or dented will not be used in this work.
4. In addition to the provisions for the protection of non-metallic components, special attention
shall be given to the protection of the control system components; protection shall be
provided as per the manufacturer's written recommendations.

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5. Openings into the system, apparatus and equipment shall be securely covered, both before
and after being set in place, to prevent obstruction in the pipes and the breakage, misuse or
disfigurement of the apparatus or equipment.
6. Barricades, guards, warning signs and lights as necessary or required, for the protection of
the public and the work force shall be provided.
7. Utilities: The location of existing underground utilities shall be determined and the works
performed in a manner which will avoid possible damage. Hand excavation, as required shall
be carried out to minimize the possibility of damage to existing underground utilities.

2.3.2 Performance
1. The Contractor shall stake-out the locations of all pipe and valves and the layout of work as
accurately as possible.

2. The Contractor shall verify all horizontal and vertical site dimensions prior to staking.

3. The Contractor will be responsible for relocating any existing services after first obtaining the
Engineer's approval. The Contractor shall remove and relocate such services, at his own
expense, if so directed by the Engineer.

4. Before starting work on irrigation systems, the Contractor shall carefully check all grades to
determine that work may safely proceed, keeping within the specified material depths.

5. Fittings installed on pipes beneath pavements or walls shall be shown on drawings.

6. All changes shall be recorded daily on the “As-Built" worksheets.

2.3.3 Inspection
1. The Contractor shall inspect all products for damage immediately before installation. Any
products that are found to be damaged or not in accordance with the specifications shall
immediately be repaired or removed from the site and replaced. Repairs shall not be
undertaken without the Engineer's approval of Contractor's proposed action.

2.3.4 Installation
1. Excavation and backfilling shall be in accordance with detail drawings.
(a) Mainline shall be placed at 70 cm deep and warning tape 20 cm above pipe as shown
in design drawings.
(b) Lateral lines should be placed at 40 cm deep without warning tape above.
(c) Width of trench to be 40 cm minimum width.
2. Sand bedding layer of 15 cm minimum is required under the irrigation pipe.
3. Sand surround to a minimum 15 around the irrigation pipe is required.
4. In bedding and backfilling granular material shall be used below and above the pipes. The
backfill material shall be free of stones bigger than
5. Cast-in-place concrete shall be in accordance with the common civil works standards
covering the concrete class, shattering work, curing procedures etc.
6. All products shall be installed in accordance with the manufacturer's instructions and the
Drawings.
7. Location of Irrigation Lines
(a) Where the location of an irrigation line is not clearly dimensioned on the Drawings, the
irrigation line shall not be laid horizontally closer than 3.0 meters from a sewer.
(b) However, where the bottom of the irrigation line will be at least 0.3 meters above the
top of the sewer pipe, the irrigation line shall not be laid closer horizontally than 1.5
meters from the sewer.

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(c) Where irrigation lines cross under gravity-flow sewer lines, the sewer pipe shall be
fully encased in concrete, for a distance of at least 3.0 meters each side of the
crossing or shall be made of pressure pipe with no joint located within 1.0 meters
horizontally of the crossing.
(d) Irrigation lines shall, in all cases, cross 0.6 meter above sewage pressure mains.
(e) Lateral lines shall be 2 meters away from center of trees, palms and large shrubs.
(f) Generally, where the irrigation distribution or secondary main with accompanying
cable bundle is running under hard surfaces or landscaped areas the pipe and the
cables will be directly buried in a clean sand bed with a marker tape above. At road
junctions or other locations where pipes cross the road they shall be contained in a
direct buried PVC sleeve. The sleeve shall extend beyond the road crossing by at
least one meter on both sides. The sleeve shall be a minimum of 100 mm diameter
and for larger pipes will be at least 25mm greater in diameter than the pipe running
through it.

8. Placing and Laying

(a) Pipes shall not be laid in water or when trench conditions are otherwise unsuitable for
the work. Water shall be kept out of the trench until the material in the joints has
hardened or until caulking or jointing is completed. When work is not in progress, open
ends of the pipe, fittings, and valves shall be securely closed so that no substance will
enter the pipes or fittings.
(b) Pipe ends left for future connections shall be valved, plugged or capped, and
anchored, as shown or as directed. Pipes that have the grade or joint disturbed after
laying shall be taken up and re-laid.
(c) All piping with the exception of the flexible irrigation drip line shall be surrounded by a
sand bed to the dimensions as shown on the Drawings.
9. Plastic pipes: Pipes with threaded joints shall be snaked from side to side of the trench to
allow for expansion and contraction.
10. Jointing
(a) Pipe joints of UPVC shall be installed in accordance with recommendations of the
manufacturer. Excess jointing material shall be removed. Heavy duty jointing material
will be used only.
(b) UPVC male adaptors with specified threaded joint compounds to make connections
between plastic pipe and valves shall be used as detailed, and tightened with light
wrench pressure.
11. Concrete thrust blocks shall be constructed on main pipelines at all changes in direction or
size. The thrust blocks shall be non reinforced concrete and shall have a minimum
dimension of 300 mm. The pipelines shall be located centrally in the thrust blocks.
12. Irrigation piping from the remote control valve boxes to the end of the irrigation drip lines
shall be buried to the depths as shown on the Drawings.
13. Closing of Pipe and Flushing Lines
(a) Closing: Openings in piping systems shall be capped or plugged, leaving caps and
plugs in place until removal is necessary for completion of the installation. Dirt and
debris shall be prevented from entering pipe or equipment.

(b) Flushing: All pipes and tubing shall be thoroughly flushed out before installation of the
emitter control valves. Butt joints, fittings and connections shall remain visible.
14. Tagging and Identification: All remote control valves, motor-operated valves, pressure
reducing valves, manually-operated gate valves and controllers shall be tagged and
identified. All identifying numbers shall be consistent with like designations indicated on the
irrigation controller schedule.

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15. Site Equipment Installation

(a) Isolation Valve/Gate Valve: Shall be installed as detailed and where indicated on
Drawings.
(b) Remote Control Valve Assembly: Shall be installed in the positions as indicated in the
details, remote control valve assembly comprising gate valve, remote control valve
with pressure regulator, and all appurtenances. Valve boxes containing the assembly
shall not be placed closer than 300mm to paved areas. When the pressure gauge will
be properly attached, the outlet pressure shall be set as required during coverage
tests.
(c) Valve Boxes: Shall be installed as detailed and where indicated on Drawings. All
valves and valve assemblies shall be mounted in boxes as detailed.
(i) The top of all boxes shall be set parallel with the grade and as detailed in a neat
and orderly fashion.
(ii) Shall be placed parallel to paving, kerbstone, walls or similar structures and
where more than one box, parallel to each other.

(iii) All box locations shall be reviewed with the Engineer prior to installation of
valves.
(iv) Valve boxes shall not rest on or come in contact with the valve, piping, hose or
conduit.
(v) Solenoid valve boxes shall have a weather proof tag attached on the inside
showing the valve number, controller number and station number.
(vi) A filter fabric shall cover the valve box and the soak away and taped to the
valve box side just 10 cm below cover.
16. Control System
(a) Irrigation Controller
(i) An irrigation controller shall be installed in locations approved by the Engineer,
with the control cables, clearly marked with identification markers, attached to
the appropriate terminals in the approved manner.
(ii) Shall be secure to a concrete pad with approved anchor bolts. Chipping,
cracking, or otherwise marring the finish of enclosure when securing to the
concrete pad shall be avoided.
(iii) Programming of Irrigation Controller: Using the controller schedule provided on
the drawings, as a guide, the irrigation controller shall be programmed to
correspond with the initial irrigation sequencing and duration of the cycles for
each zone. The Contractor may find that during establishment and maintenance
the schedule has to be modified to achieve a correct irrigation regime in
accordance with good horticultural practice, such modification shall be approved
by the engineer.
17. Irrigation - Electrical
(a) All electrical work shall be in conformance with Qatar General Electricity & Water
Corporation (QGEWC) Regulations and as further specified in Section 21, Electrical
Work, inclusive of the following:
(i) The contractor shall provide, install, test and commission all items of electrical
equipment associated with the irrigation systems.
(ii) All electrical works shall be in accordance with the BS and IEC.
(iii) The irrigation system shall commence at the controllers, which shall be fitted
into a dwarf type distribution cabinet with solar shade and shall have a bolting
down foot for mounting on a pre-formed concrete base. All incoming and
outgoing cables shall be from below ground level. The cabinet shall have a
hinged lockable opening door to provide full front access to the controller and
equipment and shall be sized according to the equipment being installed.
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(iv) All equipment, conductors, termination, etc., within the pillar and throughout the
irrigation system generally shall be fully insulated such that there are no live
parts or connections exposed and shall be to the complete satisfaction of the
Engineer.
(v) The irrigation pillar shall have sufficient free space for fitting a kWh meter
together with any additional equipment or accessories required to complete the
equipment.
(vi) Each irrigation pillar shall have permanently fixed on the inside of the door, a
distribution diagram showing all circuits connections, ratings, cable sizes, etc.,
together with a current controller schedule.
(vii) All terminals shall be of the crimped spade type with insulated grip. At all
connection locations 150 mm of "slack" shall be provided.
(viii) Conductor markers shall be used throughout which shall clearly indicate the
circuit reference or number. These shall be white plastic with black letters or
numbers and of the type which acts as a sleeve over the conductor insulation.

(ix) Connections onto valves shall be made in a below ground PVC resin filled
molded waterproof connector with integral wire clamp.
(x) Solenoid valve cables shall be laid along the mainline at a horizontal distance of
20 cm from the irrigation pipe.
(xi) Wiring under streets, driveways and other vehicular areas, and under walks,
plazas and other hardscaped areas shall be installed as specified in Section 6,
Roadworks:

18. Drip Line/Soft line Testing

(a) Drip lines shall be carefully uncoiled and laid in position without kinking. Any kinked
section shall be cut from the line and subsequently rejoined with a line joiner section.
(b) Drip lines shall be snaked as required for maximum coverage without the use of
compression fittings. Sharp bends shall be avoided where there is a likelihood of
causing kinks in the line.
(c) Drip lines shall be laid on the ground surface for a minimum of 48 hours prior to the
installation of irrigation emitters or stakes.

19. Concrete Pads

(a) Installation as detailed and where shown on the Drawings of controllers manufacturer.
(b) The exact location shall be confirmed to the Engineer prior to pouring.
(c) Specified non-metallic conduit shall be provided as required to penetrate boxes and
enclosures as approved by the Engineer.
(d) The anchor bolts shall be set in coordination with enclosure hole locations.

2.3.5 System Testing

1. Purging
(a) Immediately prior to hydrostatic testing, all irrigation lines shall be thoroughly purged of
all entrapped air.
(b) Mainline piping system may be tested in sections. Lateral Systems shall be tested
valve by valve.
(c) Water shall be discharged from a single outlet by manipulation of isolation control
valves and installation of temporary caps.
(d) Water shall be introduced into lines to be tested at full operating head and the water
flow at end discharge point, and observed until all air and residual debris has been
expelled from the line.

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2. Initial System Test

(a) Individual parts of the main network between isolation valve points having a length not
greater than 500 meters shall be tested together with dead legs before backfilling
operation.
(b) Test shall be made only after completion of the above operations and not until at least
seven days after the last concrete thrust anchor block has been cast.
(c) Contractor shall supply all testing material and equipment, including all caps, valves,
pumps, tanks, water and gauges as required.
(d) Pressure gauges shall be dual reading in bar and psi units. Calibration shall be such
that accurate determination of potential pressure loss can be ascertained.

(e) The section of the main pipeline to be tested shall be filled with potable water and all
air expelled. After the main pipeline has been completely filled, the pressure shall be
steadily and gradually increased until the specified test pressure has been reached.
Simultaneous pressure and leakage tests and separate pressure test shall be made at
150 % of working pressure at the point of test, but not less than 125% of normal
working pressure at highest elevation. Separate elevation test shall be made at 150 %
of normal working pressure of the segment tested. The minimum pressure test for
mainlines is 9 bars and leakage test for lateral lines. Duration of pressure and leakage
tests shall be 4 hours. All testing shall comply with AWWA M23-80, Polyvinyl Chloride
Pipe Design and Installation. Testing shall comply with AWWA specifications and
requirements.
(f) Separate tests shall be applied to the lateral distribution pipe work and the irrigation
pipe work from the remote control valves outwards. Test pressures for these shall be
as described above.
(g) When testing the irrigation lines from the valves, discharge devices shall be replaced
with temporary plugs or caps.
(h) All trenches with pipe installed shall be immediately backfilled with preliminary sand
backfill sufficient to prevent arching or slipping under pressure. All joints, fittings and
connections are to remain exposed until successful completion of hydrostatic testing.
(i) Other than for preliminary sand backfill over pipes, no work shall be covered before it
has been inspected, tested and approved by the Engineer.
(j) During the tests, all exposed couplings, fittings and valves shall be carefully examined
for defects and leakage. Leaking pipes, couplings, joints, fittings and equipment shall
be repaired or replaced and the section retested as previously specified.
(k) Upon receipt of approval of the Engineer to proceed, the remaining backfill shall be
placed and compacted to ninety percent (90%) of maximum dry density.
3. Final System Test: The tests as specified above shall be repeated for the entire network after
pipelines have been backfilled, cleaned and inspected. Each test shall be restricted to pipes
of one class and particular care shall be taken to isolate air valves, etc. and not to apply
higher pressures than specified at any point on the pipeline and to ensure that the pipelines
are adequately anchored before any test is carried out.
4. Test Results: Written records of every test clearly identifying the tested section of the pipe
together with time of test and name of testing engineer in tabulated format shall be submitted
for review and approval by the Engineer upon completion of the tests.

2.3.6 Flushing
1. General: On completion of the system test, the system is to be thoroughly flushed, the
velocity of water being at least 1 m/s. Should the main water supply be unavailable or
inadequate for this purpose at the time of flushing, then a swab of adequate size shall be
used to remove all foreign matter from the pipeline. This process shall continue until the
pipeline is completely clean. Each control valve shall be opened separately and the terminal
systems also thoroughly flushed. After completion of flushing, the emitters and other
discharge devices shall be fitted.

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2. Operation Test: After the hydrostatic test, emitters shall be installed and the system
completed and tested to demonstrate functional efficiency. This shall be prior to covering the
laterals with mulch if used.
3. The lines shall be operated for a period of 24 hours, not necessarily in one continuous
period, and all emitters checked for satisfactory operation. Any faulty/blocked emitters shall
be replaced.

2.3.7 Testing and commissioning

1. On completion of the entire irrigation system installation, the system shall be commissioned
to demonstrate the proper functioning of the system. The process of commissioning shall be
carried out in the presence of the Engineer’s Representative.
2. Adjustment and re-testing of emitters, control valves etc., shall be carried out until
satisfactory result is obtained and the whole system is functioning to the design requirement.

2.4. OPERATION AND MAINTENANCE

2.4.1 Maintenance Program
1. Maintenance Personnel: to have experience in Qatar based landscape contracting company
specializing in installing irrigation system for landscape.
2. Maintenance Manual: Upon completion of work and prior to initial acceptance, provide the
Engineer with Four (4) copies of a bound maintenance manual and one (1) softcopy.
(a) The manual shall contain a list of all irrigation system components including:
(i) Component description.
(ii) Supplier name, address, telephone, email and contact person.
(iii) Warranty start and end date.
(iv) Spare parts available for each component.
(v) Maintenance program by date for each component and the description of the
maintenance procedure, cleaning, flushing, lubricating, changing parts, updating
etc.
3. The general manual headings and descriptions shall be both Arabic and English.

4. PENALTY FOR NON-PERFORMANCE/ DELAY: Due to the nature of the soft landscaping
and the effect it has on the public appearance, the contractor must carry out the irrigation
maintenance work as scheduled and direct by the Engineer. Failure to do so will have severe
consequences on the contractor and the Engineer may take action the maintenance work.
The Main Contractor shall bear all the cost implications arising from this action and no
payment shall be processed until the Main Contractor processes the payment due to the new
contractor that carried out the work.
5. The Contractor shall execute the required maintenance work in accordance with the
approved maintenance program / schedule without any delay and to the satisfaction of the
Engineer. In the event the Contractor fails to carry out the work specified, The authorized
person shall employ persons other than the Contractor’s staff to carry out the work and shall
recover from the Contractor such costs incurred thereby from any monies due, or which
become due, to the Contractor. In addition the Contractor shall be liable to Penalties as
follows:
(a) Delay in replacing damaged sprinklers.
(b) Delay in replacing damaged manual valves.
(c) Delay in replacing damaged remote valves.
(d) Delay in replacing damaged valve boxes .
(e) Delay in replacing damaged pipes .
(f) Delay in cleaning 2” Y strainer .
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(g) Delay in cleaning 3” disc filters.

(h) Delay in repair of pumps beyond 2 days- Replacement of the pump in addition to cost
of irrigating by hand.
(i) Delay or manual operation of controllers.
(j) Delay in replacement of controllers.
(k) Delay in watering plants.
(l) Not following the approved irrigation schedule.
(m) Opening irrigation valves outside the irrigation schedule.
(n) Water leaks to the street.
(o) Due to non availability of TSE water the contractor shall deliver and properly irrigate
the area.

2.4.2 Operational Personnel and Manual

1. Operational Personnel: to have experience in Qatar based landscape contracting company
specializing in installing irrigation system for landscape.
2. Operational Manual: Upon completion of work and prior to initial acceptance, provide the
Engineer with Four (4) Hard copies of a bound operational manual and one (1) softcopy.
(a) The manual should contain a list of all irrigation system component including:
(i) Original operational manual.
(ii) Operational schedules.
(iii) The general manual headings and descriptions shall be both in Arabic and
English.

2.4.3 Operation Program

1. The contractor shall operate and maintain the irrigation system throughout the maintenance
period, and shall provide staff in full time attendance throughout the period.
2. The maintenance of the irrigation system shall cover all work necessary to adequately operate
and keep all irrigation equipment, valves, pipelines and appurtenances in proper operating
condition, all to the satisfactory of the engineer.
3. Maintenance shall include but not limited to the following:
(a) Supply of irrigation water of suitable quality and adequate quantities to meet the
irrigation requirements. The contractor shall arrange to obtain water from an approved
source. A full analysis of the irrigation water shall be submitted to the engineer for
approval and then at one month intervals thereafter during the maintenance period.
(b) Irrigation of areas forming part of the works at a frequency and depth as required for
every season in the maintenance period.
(c) Maintenance and repair of all irrigation equipments, pipes , valves and all
appurtenances; records shall be kept of all maintenance ,repairs and operation activities
carried out during the maintenance period.
(d) The contractor shall provide to the engineer at the end of the maintenance period a
report which shall include details of the date, location and type of work performed , all
repairs and replacements , the amount f water applied and the duration of each
irrigation cycle , results of water analysis and all other relevant information of work and
activities carried out during the maintenance period.
4. Layout work
(a) The contractor shall be responsible for the accuracy of all layout work.

(b) Drawings are diagrammatic to the extent that swing joints offsets and all fittings are not
shown and shall be the responsibility of the contractor to incorporate as needed and as
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compatible or acceptable with other included items.

(c) Lines are to be in common trenches wherever possible.

(d) Remote controls valves shall be grouped wherever possible and aligned at a set
distance from road edges, footpaths and buildings.

2.5. SPARE PARTS

2.5.1 General
1. The Contractor shall submit to the Engineer a list of all spare parts to be required for a
further two years operation from the date of issue of the Maintenance Certificate or otherwise
specified herein after.

2. Spare parts required include but not necessarily limited to those listed below, provided
specified in the Project Documentation or where quantities for each item or equipment is
recommended by the manufacturer
3. Spare parts are to be delivered to central stores.
4. The tenderer shall submit with his offer detail prices of the spare parts he is required to
provide under the Contract indicating the quantity and the unit rate of each item.
5. The Contractor shall provide sufficient spare parts as follows.
(a) Air Release Valve: 10 % spare, but in any case not less than 1 nos as specified and
used in the project or in this section & shall carry a 3 years exchange warranty.

(b) Screen Filter: 10 % spare, but in any case not less than 2 nos of cartridges as
specified & used in the project or in this section.

(c) Polyethylene In Line Drip: 10 % spare, but in any case not less than 1 roll as specified
& used in the project or in this section with 2 years guarantee against solar radiation
and 1 year manufacturer and supplier warranty against manufacturing defects.
(d) On Line Drippers: 20 % spare from the different flow size, as specified & used in the
project or in this section with 2 years guarantee against solar radiation and 1 year
manufacturer and supplier warranty against manufacturing defects.
(e) Pressure Compensating Bubbler: 20 % spare from the different flow size used in the
project, with all fittings and accessories specified by the manufacturer for a proper
usage with two years manufacturer and supplier replacement warranty.
(f) Rotor Sprinkler: 10 % spare from the different flow sizes and ranges & 25 % of the
required nozzles, spare parts must be from the same brand used in the project or
equivalent up to engineer's approval with all fittings and accessories specified by the
manufacturer for a proper usage with two years manufacturer and supplier
replacement warranty.

(g) Pop Up Spray: 10 % spare from the different flow sizes and ranges & 25 % of the
required nozzles, spare parts must be from the same brand used in the project or
equivalent up to engineer's approval with all fittings and accessories specified by the
manufacturer for a proper usage with two years manufacturer and supplier
replacement warranty.

(h) Irrigation Control Wire: 10 % from the total length used in the project, the detail of
Voltage, Ampere and size of cable as per the manufacturer recommendation and
technical data and shall carry a 1 year manufacturer and 2 years supplier warranty.
(i) Solenoid Valves: 10 % from the total no. used in the project plus 20 % from the
required coils, The valve sizes, number and flow rate must be as used & shown on the

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design drawings and shall carry a 3 years manufacturer and supplier exchange
warranty.

(j) Quick Coupling Valve: 10 % spare, but in any case not less than 1 valve. The valve
must be of the low-pressure loss type of 1 inch, brass body with all fittings and
accessories used in the project or specified by the manufacturer and shall carry a 3
years manufacturer and supplier exchange warranty.

(k) Gate Valve: 10 % spare, but in any case not less than 1 valve. As specified and used
in the project or in this section and shall carry a five years manufacturer and supplier
exchange warranty for the bronze or brass type and 3 years manufacturer and
supplier exchange warranty for the PVC types with all fittings required by the
manufacturer manual.

(l) Check valve: 10 % spare, but in any case not less than 1 valve. As specified and used
in the project or in this section and shall be available in 3”, 4”, and 6”size & carry a 3
years exchange warranty.

(m) Valve Boxes: 10 % spare, but in any case not less than 1 box. As specified and used
in the project or in this section with two years replacement warranty against buckling
and five years against cracking.

(n) PVC Pipes & Fittings: 10 % from the total length used in the project from different
sizes with same ratio of the required fittings and accessories or equivalent all up to
engineers approval.

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PREFERRED VENDORS LIST

AUTOMATIC IRRIGATION SYSTEM

S.No Description Brand Name Country of Local Agents

Origin
1 Quick Coupling Valves 1 Rain Bird USA

2 Toro USA

3 Hunter UK Meac water system

Tel:4411800
Fax:4311968
2 UPVC Pipes & Fittings 1 Hunter UK Meac water system
Tel:4411800
Fax:4311968
2 Hepworth UK Al Andalus
Trading
P.O.Box-
24155
Tel:4432822
Fax:4354322
3 Terrain UK SATCO Trad.
P.O.Box-8859
Tel;4415564
Fax:4422809
3 Isolating Valves 1 Crane Hattersley UK Mannai Trading
Tel: 4412555
Fax: 4431858
2 Econosto UAE Water Tech
Tel: 4368533
Fax: 4368542
3 Peglers UK Tadmur Cont.&
Trad.
P.O.Box-6984
Tel:4413628
Fax:4410812
4 Irrigation Access 1 Rain Bird USA

2 Toro USA

3 Irredalco

4 Hunter UK Meac water system

Tel:4411800
Fax:4311968
5 Spray Pop-up Sprinkler 1 Hunter UK Meac water system
Tel:4411800
Fax:4311968
2 Rain Bird USA Rain Bird

3 Toro USA Toro

6 Irrigation Pumps 1 Holden & Brooke EU Saleh Bin Mubarak

Pullen Al Khulaiti Est
P.O.Box-132

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2 KSB Germany SITC

P.O.Box:32340
Tel: 4448222
Fax: 4428882

3 EBARA Japan Abdul Rahiman

Abdulla Obeian &
sons
P.O.Box: 254
Doha, Qatar
Tel: 4423402
Fax: 4416652
4 Grundos

5 Wilo

7 Irrigation Controller 1 Hunter

2 Rainbird

3 Motorolla

8 Sprinkler/Busbar/Emitters 1 Hunter

2 Rainbird

3 Wingfeild

9 Dripper System 1 Geberit

2 MFAC

3 Hunter

4 Rainbird

5 Wingfeild

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