GRAND DYNAMIC BUILDERS SDN BHD
SAFE WORK METHOD STATEMENT
FOR COLD WATER PLUMBING SERVICES
– UNDERGROUND INSTALLATION
By: TSP MECHANICAL SDN BHD
1. SCOPE OF WORK
1.0 OBJECTIVE
This method statement intends to outline the safe procedures and methods to be
taken and carrying out the installation of the cold water piping system, tanks , pump
sets and accessories. Periodic review on the specific details at site shall be carried
out and necessary adjustments may be made based on these finding. This statement
shall not deemed as conclusive nor shall it be regarded as a replacement of the
original design and is solely proposed without prejudice.
1.1 REFERENCES
- Shop Drawing
1.2 Materials, Equipment and Manpower
1.2.1 Plant and Equipment
No. Plant and Equipment Description
1 Portable hand tools Installation purpose
2 Portable drill machine / Grinding
Making a hole for bracket
machines
3 Cutting machine Cut the pipe
5 Chain block Lifting equipment and materials
6 Trolley Transporting materials
7 Handsaw Cut the pipe
8 Hammer To drive fastener/nails into an object
9 Pressure gauge To testing pipe
GRAND DYNAMIC BUILDERS SDN BHD
SAFE WORK METHOD STATEMENT
FOR COLD WATER PLUMBING SERVICES
– UNDERGROUND INSTALLATION
By: TSP MECHANICAL SDN BHD
1.2.2 Plant and Equipment
No Materials Purpose
1 HDPE pipe and fittings Incoming pipe and distribution pipes
2 Flanges Connecting pumps, pipes and fittings
Piping accessories and reduce
3 Flexible connector
vibration
4 Gaskets Waterproof seal and reduce vibration
5 Fire seal, rockwool and fiberglass
Seal opening in fire rated wall or floor
assembly
6 Fire Hydrant
Provides an immediate and reliable
source of water for firefighter to
extinguish fire.
1.2.3 Manpower
No. Designation Responsibility
1 Site Supervisor Supervising construction activities
2 Skilled Workers Installation of Materials
3 General Workers Carrying out general works at site
GRAND DYNAMIC BUILDERS SDN BHD
SAFE WORK METHOD STATEMENT
FOR COLD WATER PLUMBING SERVICES
– UNDERGROUND INSTALLATION
By: TSP MECHANICAL SDN BHD
1.0 Procedure
1.1 Pipe Laying Via Open Trench Method
a) Generally, water pipes will be laid via open trench method. Prior to the trenching work, the
trial pit is conducted by hand-digging with the combined utilities drawing in hand to confirm
the existing services. The minimum depth required for any pipe laid using open trench
method shall be 300mm - 1 m from ground level to the top of pipe.
b) Identify the pipe routing and mark on site before start excavate open trench
c) After all the mark area are confirm, start excavate using machine or manual by hand.
d) Laid the pipe in the open trench and do the connection between pipe until complete. The
pipe installation can refer to figure 1 and 2
e) Call for inspection physical installation and proceed with pressure test with IOW before start
backfill the earth.
f) Backfill the earth and clear all the waste materials and debris
Figure 1
Page 3
GRAND DYNAMIC BUILDERS SDN BHD
SAFE WORK METHOD STATEMENT
FOR COLD WATER PLUMBING SERVICES
– UNDERGROUND INSTALLATION
By: TSP MECHANICAL SDN BHD
1.2 Installation of Ductile Iron Pipes
a) Prior to installation of the pipes, check and study the piping routing. Mark the hanging
points where the pipe route is indicated as per shop drawing and drill the holes that have
been marked. All pipes and fittings shall be cleaned of soil and dust and inspected for
visual cracks. Upon determination of pipes insert the type A bracket in to the pipe move
to the hanging rod point than hang the pipes accordingly. The type A bracket supported
by steel threaded rod and fastened in place using bolt and nuts. Connection of pipe and
pipe to fitting shall be via flange type or socket-to-spigot type.
b) Puddle flange shall be fully welded on pipes for water stop and reinforcement purpose.
All penetration through R.C wall shall incorporate a puddle flange.
c) Gasket is places onto socket on, after which the socket is cleaned and lubricant applied.
Spigot end is then push onto the socket end to complete connection. In cases where the
connections are connected by flanges to flanges always tighten the bolt and nuts on
opposite ends. Never tighten bolt and nuts side by side as this may cause uneven
tightening strength on the flange mating connections. Carry out leakage and hydrostatic
pressure test upon completion of the piping system.
Figure 2
GRAND DYNAMIC BUILDERS SDN BHD
SAFE WORK METHOD STATEMENT
FOR COLD WATER PLUMBING SERVICES
– UNDERGROUND INSTALLATION
By: TSP MECHANICAL SDN BHD
2.0 SAFETY AND HEALTH
2.1 Job Safety and Health
Hazard analysis with risk assessment shall be carried on the project site. The hazards in a particular
activity and the control measures implemented shall be briefed to the workers during Safety Induction,
Tool Box Meeting and MS Briefing. The specific hazards, risks and associated control measures of
the work described in this document are detailed in the Job Safety & Health Analysis.
2.2 Information to Personnel
a) Prior to commencement of the works, a kick-off meeting with Safety & Health department will
be held prior to implement and audit the safety requirement at site.
b) Personal protective equipment (P.P.E) will be supplied to all personnel involved with works on
site.
c) Monthly safety and health committee meeting will be held with the participation of all
contractors engaged for the work as Employee representatives.
d) Method statement briefing will be carried out and recorded for participating contractors to
ensure the work is done in a correct manner.
e) Regular safety & tool box briefing will be conducted for the workers on site to ensure
compliance to safety requirement.
f) All employees shall undergo a safety, health and environment induction course before they
are allowed to commence works.
g) The risk associated during carried out works have been identified and the control measures
which are to be implemented are shown in the job risk assessment.
h) The significant environment impacts are detailed in the Operation Control Log
Page 5
GRAND DYNAMIC BUILDERS SDN BHD
Hydrant & Sluice Valve Installation Inspection Checklist
Project : [SDPLOG] i7A Metro Hub 4 Date of Inspection :
Project Ref. No. : GDBSB/018 Level :
Block/Zone : Location/Gridline :
Drawing Ref. No. : Services :
Acceptability
Subcon / GDB's
RE / COW
No. Description Rep Remark
OK NOT OK OK NOT OK
1 Hydrant pipe & material size
2 Pillar hydrant as per approved list
3 Sluice valve
4 Inspection chamber
5 Support and mounting
6 Painting
7 Location of hydrant as per approved drawing
8 Cleanliness
(1) Non-Conformance: (3) Re-Inspection:
(2) Disposition: (4) Comment:
Prepared by (Subcon's Rep) Checked by (GDB's Rep) Verified by (RE/COW)
Signature Signature Signature
Name : Name : Name :
Date: Date: Date:
GDB/PQP/M&E/H-SV Rev.No.: 0 Issue Date: 23.12.2024 Page 1 of 1
GRAND DYNAMIC BUILDERS SDN BHD
Underground Duct Works and Pipe Works Checklist
Project : [SDPLOG] i7A Metro Hub 4 Date of Inspection :
Project Ref. No. : GDBSB/018 Level :
Block/Zone : Location/Gridline :
Drawing Ref. No. : Services :
Acceptability
Subcon /
RE / COW
No. Description GDB's Rep Remark
NOT
OK OK NOT OK
OK
1 Materials / pipe/duct sizes.
2 Piping/duct layout as per approved shop drawings.
3 Trench excavation / depth
4 Pipe/duct bedding.
5 Pipe gradient and invert level.(where applicable)
6 Check for proper pipe/duct jointing.
7 Alignment of pipe/duct run.
8 Haunching. (where applicable)
9 Draw wire. (where applicable)
Protection brick and slab / identification sheet (where
10
applicable)
11 Removal of unwanted materials before backfilling.
12 Backfilling and compaction.
(1) Non-Conformance: (3) Re-Inspection:
(2) Disposition: (4) Comment:
Prepared by (Subcon's Rep) Checked by (GDB's Rep) Verified by (RE/COW)
Signature Signature Signature
Name : Name : Name :
Date: Date: Date:
GDB/PQP/M&E/UDP Rev.No.: 0 Issue Date: 23.12.2024 Page 1 of 1
GRAND DYNAMIC BUILDERS SDN BHD
Pipe Works Pressure Test
Project : [SDPLOG] i7A Metro Hub 4 Date of Inspection :
Project Ref. No. : GDBSB/018 Level :
Block/Zone : Location/Gridline :
Drawing Ref. No. : Services :
1 Description of work:
2 Location:
3 Testing parameter:
a. Test duration(hr):
b. Test medium:
c. Test pressure(psi):
d. max. allowable pressure drop(psi):
4 Test Result Start End Remark
a. Time
b. Date
c. Pressure(psi).
5 Conclusion Passed / Failed
Remark
(1) Non-Conformance: (3) Re-Inspection:
(2) Disposition: (4) Comment:
Prepared by (Subcon's Rep) Checked by (GDB's Rep) Verified by (RE/COW)
Signature Signature Signature
Name : Name : Name :
Date: Date: Date:
GDB/PQP/M&E/PPT Rev.No.: 0 Issue Date: 23.12.2024 Page 1 of 1
GRAND DYNAMIC BUILDERS SDN BHD
Pipe Works Leakage Test
Project : [SDPLOG] i7A Metro Hub 4 Date of Inspection :
Project Ref. No. : GDBSB/018 Level :
Block/Zone : Location/Gridline :
Drawing Ref. No. : Services :
1 Description of work:
2 Location:
3 Testing parameter:
a. Test duration(hr):
b. Test medium:
c. Test pressure(psi):
d. max. allowable pressure drop(psi):
4 Test Result Start End Remark
a. Time
b. Date
c. Pressure(psi).
5 Conclusion Passed / Failed
Remark
(1) Non-Conformance: (3) Re-Inspection:
(2) Disposition: (4) Comment:
Prepared by (Subcon's Rep) Checked by (GDB's Rep) Verified by (RE/COW)
Signature Signature Signature
Name : Name : Name :
Date: Date: Date:
GDB/PQP/M&E/PLT Rev.No.: 0 Issue Date: 23.12.2024 Page 1 of 1
