INDEX

1. Foreword and Scope

2. LPG Supply to Commercial Kitchens and Food Preparation

Establishments
2.1 General Requirements

2.2 Piped Installation from Bulk, Central LPG Supply

2.3 LPG Cylinder Supply

(less than 130 litres WC)

3. Fixed Gas Appliances

3.1 General Requiments

3.2 CookinglFood Warming Appliances Installed within Seating

Areas

3.3 CookinglFood Warming Appliances Installed at Serving

Counten in RestaurantdShopping Centres

4. Portable Gas Appliances

4.1 Dim S d F o o d Warming Trolleys

4.2 Disposable LPG Cartridges and Cassette Cookers

5. Testing and Commissioning of New Installstion Work

5.1 Installation Pipework and Flow Controls

5.2 Gas Appliances

 1. Foreword and Scope

W a t e r C a p e t a E a k f f G Containers and permitted 1.1 This code has been prepared as a general outline of minimum
Appendix 1 -
Appendices safety standards to be followed by Restaurant Operators and
numbers
J ,:. ~ . Registered Gas Contractors. Guidance is given on
- requirements for installation of liquefied petroleum gas (LPG
Appendix 2 Examples of Lacation for Fire Safety Valve
vapour) for catering purposes in commercial premises, such as
- restaurants and food preparation establishments. For
Appendix 3 Typical LPG Cylinder Storage Chamber
Towngas installations reference must be made to Hong Kong
Appendix 4 - and China Gas operating procedures.
Location and Ventilation of LPG Cylinder Storage
Chamber
1.2 All gas installation work must comply with local statutory
safety requirements. Particular reference should be made to
Appendix 5 - Gas Flow and Pressure Controls for LPG Chamber
- The Gas Safety Ordinance (Cap 51):-
Installation
- The Gas Safety (Gas Supply) Regulations

(Cap. 5 1 sub-legislation);
Appendix 6 - Notices for LPG Cylinder Storage Chamber
- The Gas Safety (Installation and Use) Regulations

(Cap. 5 1 sub-legislation);
Appendix 7 - Schematic Diagram of Dim Sum Trolley
- The Gas Safety (Registration of Gas Installers and Gas

- Typical Examples of Dim Sum Trolley Contractors) Regulations (Cap. 51 sub-legislation);

Appendix 8
- The Gas Safety (Miscellaneous) Regulations
- (Cap. 51 sub-legislation);
Appendix 9 Safety Notice for Dim Sum Trolley
- The Building Regulations (Cap. 123);
- The Electrical Ordinance (Cap. 406);
Appendix 10 - Typical Example of Dim Sum Trolley Safety Inspection
- The Electricity (Wiring) Regulations

Appendix 11 - LPG Cylinder Draw-off Rates (Cap. 406 sub-legislation);

- The Water Works Regulations (Cap. 102).

Appendix 12 - Volumes of Installation Pipework

1.3 Reference should also be made to relevant codes of practice,
to include:-
- LPG Industry of Hong Kong Standard Practice Manual

Volume 1 "Piped Vapour Supply Systems";

- British Standards Code of Practice BS 476 Part 3-8;
- British Standards Code of Practice BS 1387 and BS 21;
- British Standards Code of Practice BS 2871 Part 1 and

BS 864 Part 2;
- British Standards Code of Practice BS 3212;
- British Standards Code of Practice BS 4683;
- British Standards Code of Practice BS 5440 Part 2;
- British Standards Code of Practice BS 5482 Part 1;
- British Standards Code of Practice BS 6644;
- Hong Kong SAR Government Gas Utilisation Code of

Practice 03;

Part 1 "Installation Requirements for Domestic

Instantaneous Water Heaters (up to 60 kW)";

 - Hong Ibng- Qwexument Code of Practice for the 2. LPG Supply to ~ommercialKitchens and Food Preparation
Electricity (Wiring) Regulations. Establishments
- NFPA 58, Standard for the Storage and Handling of
Liquefied Petroleum Gases 2.1 General Requirements
- Hong Kong SAR Government Gas Utilisation Code of
Practice 09 for LPG cylinder regulators. 2.1.1 This code applies to new gas installations, but does not
include specific storage requirements for LPG containers
These requirements inoorporate aspects of fire safety which where the aggregate quantity exceeds 130 litres water capacity
have been agreed with the Fire Protection Bureau (FPB) of (Appendix 1). If the aggregate water capacity of LPG
Fire Services Department and therefore supersede all gas container(s) exceeds 130 litres, irrespective of whether full of
safety requirements previously contained in FPB documents LPG or not, prior approval must be sought from the Gas
issued for Places of Public Assembly (PPA requirements). Authority for construction and use of an NGI in accordance
with Regulation 3 of the Gas Safety (Gas Supply)
Not included within the scope of this document are the Regulations.
specific design requirements for bulk storage of LPG in
containers exceeding 130 litres aggregate water capacity, nor 2.1.2 Similarly, liquid draw-off installations, which necessitate the
liquid draw-off installations which may incorporate a separate addition of a separate means of vaporisation (e.g. electrical
vaporisation stage. These are "Notifiable Gas Installations" vaporiser), are deemed to be NGIs. Therefore prior approval
(NGIs) and must have prior approval of the Gas Authority of the Gas Authority must be sought for construction and use
for both construction and use, in accordance with Regulation in accordance with Regulation 3 of the Gas Safety (Gas
3 of the Gas Safety (Gas Supply) Regulations. Supply) Regulations.

LPG cylinders* should not be installed'in commercial 2.1.3 LPG shall not be supplied to basement kitchens or seating
premises to supply fixed gas appliances for catering purposes areas below ground level.
&a central LPG, or Towngas, supply is unavailable.
2.1.4 LPG cylinders should Q& be installed to supply fixed
For example, where service riser(s) of a piped-gas supply are appliances where a piped gas supply is mt available within a
already located in a building, then connecting any new gas premises (see 1.6).
installation, or additional gas appliances, to the piped gas
supply must always be the first choice rather than using LPG 2.1.5 LPG cylinders shall be of a type approved by the Gas
cylinders Authority in accordance with Regulation 7 of the Gas Safety
(Gas Supply) Regulations

defined in Section 2 of the Gas Safety Ordinance Cap 51.) 2.1.6 LPG cylinders should be located in a purpose designed
chamber in accordance with section (2.3) of this installation
code.

2.1.7 LPG cylinders installed shall be capable of supplying gas at

normal vaporisation rates (see Appendix 11) to meet total
thermal input of kitchen gas appliances. An external heat
source, such as a water bath for example, is potentially
. hazardous and shall be used.
A p l ~LPG qlinder installed to supply gas from a chamber 2.2.5 Pressure regulating installations for the inlet gas supply shall
within a premises, should not-be exchanged on more than one comply with requirements for general safety and location
occasion in 24 hours, unless the operator is able to demon- specified in Regulations 21 and 22 of the Gas Safety (Gas
strate special LPG cylinder deliverylcollection arrangements Supply) Regulations.
with a gas distributor so as to minimise risk to public safety.
2.2.6 Gas supply pipework inside premises shall operate at
The commissioning of gas installation work in commercial pressures not exceeding low pressure '760mm water gauge (1
kitchen and restaurant premises shall only be undertaken by psi), however, internal installation pipework should normally
Registered Gas Installers qualified to at least Class 6. operate at *300mm water gauge (0.4 psi) wherever possible.
(Also see 3.2.4). A convenient pressure test point should be
Gas catering appliances (fixed and portable) should be installed.
serviced annually; flexible gas rubber tubing should be
inspected regularly (exchanged at least every three years). 2.2.7 Internal installation pipework and appliances shall be
Such work shall only be undertaken by Registered Gas protected against over-pressurisation in accordance with
Installers qualified to Class 7 level. Regulation 12(b) of the Gas Safety (Installation and Use)
Regulations.

Piped Installations supplied from Bulk, Central LPG 2.2.8 Emergency Control Valve
Supply
An emergency gas control valve shall be installed as close as
The bulk storage of LPG in containers exceeding 130 litres possible to the point of service entry into the premises in an
total water capacity, is an NGI and shall be approved by the accessible location. The location and labelling of the valve
Gas Authority in accordance with Regulation 3 of the Gas shall be in accordance with Regulation 8 of the Gas Safety
Safety (Gas Supply) Regulations. (Installation and Use) Regulations.

Gas supply and internal installation pipework, up to indi- '760mm W.G. = 7.5kPa
vidual appliance isolation valves, shall be of steel construc- '300mm W.G. = 3.0kPa
tion, conforming to an international standard such as BS
1387 (heavylmedium) as specified in the LPG Industry of 2.2.9 F i e Safety Valve
Hong Kong Standard Practice Manual Volume 1. Short
lengths of steel pipework inside LPG storage chambers 2.2.9.1 A gas isolation valve shall be located external to the kitchen
(2.3.9.2), exposed to cylinder pressure should conform to an area for use by Fire Service Officers in an emergency. The
international standard, such as to BS 3601. valve shall be located in an accessible position and be labelled
(for example Appendix 2.1); or
Lengths of gas pipework installed within premises shall be
clearly identified; kept to a minimum; and separated from 2.2.9.2 Where a service riser supplies gas to a single kitchen within a
electric conduit, or cable, by at least 25mm. building (for example Appendix 2.2), this requirement can be
met by locating the "fire safety" valve external to the building
Gas supply pipework shall be installed in a safe and work- on an outside wall, providing it is accessible to Fire Services
manlike manner in accordance with Regulations 17, 18 and (i.e. at ground or podium level for example). An external
19 of the Gas Safety (Gas Supply) Regulations. Specific valve should be suitably protected against unauthorised
attention shall be given to means of protecting pipework interference and labelled. This valve may be additional to
against corrosion, mechanical damage; and provision of that required by (2.2.8), or a single valve may fulfil
ventilation for service ducts. Gas pipework shall not be requirements for (2.2.8) and (2.2.9), where it is possible to do
installed in unventilated voids nor in rooms accommodating so (for example Appendix 2.3); or
air conditioning or ventilation equipment for premises.
2.2.9.3 U it is not possibte,@,lo~nte the fire safety valve extcmal to 2.3 LPG Cylinder Supply (less tban 130 L i e WC)
thc building, or to th kitchen itself, then a valve may be
installed immsdinWy.within the kitchen entrance for this 2.3.1 LPG cylinders should only be installed to supply fixed
purpose (Appendix2.4)..A permanent notice, advising Fire appliances where a piped gas supply is not available within a
Service Officers of the valve location, shall be placed outside premises (see 1 4 .
the kitchen entrance.
2.3.2 LPG cylinders shall be located in a purpose designed
chamber (Appsldix 3). Care ahall be taken to ensure that the
total thermal input o f kitchen gas appliances can be supplied
In the case of non-domestic premises having high gas from LPG cylindm operating at normal vaporisation rates
consumption, pipework shall be installed and labelled in
(2.1.7) and with an aggregate water capacity not exceeding
accordance with Regulation 22 of the Gas Safety (Installation 130 litres (Appendix 1 shows water capacities of each
and Use) Regulations cylinder type; and Appendix 11 shows typical vaporisahon
rates of cylinders and thermal inputs of kitchen equipment.)
2.2.11 Gas Meters
2.3.3 Any LPG cylinder installed to supply gas from a chamber
2.2.1 1.1 Primary gas meters shall be installed as close as practical to
within a premises should not be exchanged on more than one
the point of service entry into the premises and be suitably
occasion in 24 hours unless the operator is able to demon-
labelled in acwrdance with Regulation 13 of the Gas Safety
strate special LPG cylinder deliverylcollection arrangements
(Installation and Use) Regulations
with a gas distributor so as to minimise risk to public safety.
2.2.11.2 Gas meters shall not installed in areas designated as the
only means of escape from premises. For meters installed in 2.3.4 Cylinders shall not be used at serving areas located in
such locations prior to 1 April 1991. future replacements shall enclosed air-conditioned, wmmon walkways within wmmer-
be in accordance with Regulation lO(1) of the Gas Safety cia1 shopping areas of two storeys or more, which are deemed
(Installation and Use) Regulations. to be a means of escape in the event of fire; nor indoor public
swimming pools
2.2.12 Connection to Appliaocs
2.3.5 Far commercial premises, the gas operating pressure for
2.2.12.1 The final connection to appliances may be rigid. or flexible, internal installation pipework shall not exceed *7Mhnm water
depending upon appliance type and size. gauge (I psi) outside the cylinder chamber and should be
limited to *300mm(0.4psi) water gauge wherever possible.
2.2.12.2 Rigid metallic pipework shall consist of steel or copper
(compression) fittings to a mognised international standard '760mm W.G. = 7.5kPa
(e.g steel fittings to BS 1387, copper to BS 2871 Part I). *300mm W.G. = 3.OkPa
Rigid copper pipwork shall not be used for connecting
movEable appliances to the gas supply. 2.3.6 LPG Cylloder Storage Chamber: h a t i o n and
c-eon
2.2.12.3 All low pressure flexible tubing used for this purpose shall be
of a type approved by the Gas Authority (e.8. GSO-RT-2) in 2.3.6.1 A chamber shall be designed specifically for the storage of
accordance with Regulation 3 of the Gas Safety (Mixellane- LPG cylinders having an aggregate water capacity not
ous) Regulations It should be noted that GSO-RT-2 tubing is exceeding 130 litres It should be located outside, in open air
suitable for gas pressures up to M mbar (*510mm water where possible, or may be inside a building provided that
gauge) only. Where gas pressure exceeds 50 mbar ( x e 2.3.5) adequate ventilation is provided (see 2.3.7).
then tubing shall be in accord with a recognised standard e.g.
BS 3212 Type 2 or equivalent. 2.3.6.2 The location of a chamber shall not i m ~ e d ethe means of

I escape from a premises nor breach any structure which

provides for interior fire separation.
A chamber shal hot:be located in any area where natural, 2.3.7.2 Where LPG cylinders, of aggregate water capacity exceeding
low level ventilation cannot be provided. This precludes 72 litres (approx, 32 kg LPG), but not exceeding 130 litres
locations in basement ~ r e a for
s example. (approx. 50 kg LPG), are stored, the chamber shall be
ventilated direct to open air (Appendices 4.1 and 4.2).
A chamber shall not be located above, or less than 1 metre,
from drains. 2.3.7.3 Where the aggregate water capacity of LPG cylinders stored
does not e x 4 72 Iitres:-
A chamber shall be located such that i'ts doors do not open
directly into a restaurant seating area inside a premises; into (a) the &amber should still be vented directly to open air if
an air-conditioned pedestrian walkway; nor on to a highway. possible, or if this is not possible, it may be vented to
open air by a duct; pf
Where a chamber accommodates two or more cylinders
within a commercial kitchenlfood preparation area, it shall be (b) only where each LPG cylinder in the chahber has an
located at least 2m away from any fixed source of naked individual low pressure cylinder regulator fitted, the
flame. chamber may be vented directly into the kitchen,
providing the kitchen itself is well ventilated to open air
A chamber shall be constructed of concrete, or a material (Appendix 4.3).
having at least 2 hour fire resistance (e.g. BS476) and
sufficient mechanical strength to afford proper protection to 2.3.7.4 Ventilation openings shall be provided at both high and low
the LPG cylinders and related equipment. level. The minimum free area shall be:-

Steel door(s) are preferred, particularly for chambers inside (a) low level: 100 cm2or 11100th of the chamber enclosed
kitchen premises. However, as a minimum, chamber door(s) floor area, whichever is the greater;
shall be constructed of material having at least 1 hour fire
resistance (e.g. BS 476) and sufficient mechanical strength to (b) high level: 50 cm2 or 11200th of the chamber enclosed
afford proper protection to the LPG cylinders and related floor area, whichever is the greater;
equipment. Doors shall normally be kept closed, and locked
if the chamber is external to the premises. 2.3.8 LPG Cylinder Storage Chamber: Permanent Warning Notices

A chamber shall be suitably sized to allow for storage of all 2.3.8.1 The words "LPG CHAMBER", in English and Chinese
required LPG cylinders in an upright position; easy exchange characters shall be prominently indicated on the outside of
of LPG cylinders; and safe operation of LPG control valves. the chamber doors.

The chamber shall not contain electrical apparatus unless 2.3.8.2 Instructions concerning the safe exchange of LPG cylinders,
flameproof to an international standard (e.g. BS 4683). in English and Chinese characters, shall be prominently
displayed at all times within the chamber (Appendix 6.1).
LPG Cylinder Storage Chamber: Ventilation
2.3.8.3 A label advising the users that the gas supply should be
The ventilation openings of a chamber shall normally turned off at the cylinders whenever the premises is closed for
communicate directly with open air areas which afford business, in English and Chinese characters, shall be provided
adequate air movement (see 2.3.7.4). Such ventilation at the chamber (Appendix 6.2).
openings shall not be directed into adjacent buildings;
designated means of escape.from premises; indoor seating
areas; or hazardous areas.
 2.3.9 LPG Cylinder Storage Chamber: Internal Gas Flow Controls 2.3.10 LPG Cylinder Supply: F3pework and Control Valves
and Internal Piping
2.3.10.1 Gas pipework running from the LPG cylinder chamber to
2.3.9.1 The outlet gas supply pressure from the chamber should not appliances shall be of steel construction to a standard
exceed normal inlet pressure for low pressure appliances (i.e. included within the LPG supply Industry of Hong Kong
*300mm water gauge (0.4psi)). However up to *760mm Standard Practice Manual Volume 1 (e.g. BS 1387); be
water gauge (lpsi) is allowed providing the supply to suitably protected against corrosion; and securely fixed to
appliances, designed to operate at 300mm water gauge, walls.
incorporates a service regulator, or each appliance is
equipped with an individual regulator (note special require- 2.3.10.2 An isolation valve, labelled in Chinese and English characters,
ments in 3.2.4). The outlet pressure may be controlled by shall be provided in the gas supply immediately outside the
means of individual cylinder regulators recommended by the LPG cylinder chamber.
Registered Gas Supply Company and compatible with the
LPG cylinder type (Appendix 5.1); or by a properly secured 2.3.10.3 The LPG supply pipe shall be clearly identified.
manifold arrangement using a single regulator recommended
by the Registered Gas Supply Company (Appendix 5.2). 2.3.10.4 The final connection of appliances may be rigid, or flexible,
depending upon appliance type and size.
*760mm W.G. = 7.5kPa
*300mm W.G. = 3.0kPa (a) Rigid metallic pipework shall consist of steel or copper
(compression) fittings to a recognised international
2.3.9.2 Where a manifold is connected to two or more LPG cylinders standard (e.g. steel fittings to BS 1387, copper to BS 2871
at a pressure exceeding low pressure (Appendix 5) then:- Part 1). Rigid copper pipework shall not be used for
connecting moveable appliances to the gas supply.
(a) non-return valves shall be fitted to each LPG cylinder
outlet connection: and (b) All low pressure flexible tubing used for this purpose
shall be of a type approved by the Gas Authority
(b) flexible tubing length shall not exceed Im for each LPG (e.g. GSO-RT-2) in accordance with Regulation 3 of the
cylinder installed; and Gas Safety (Miscellaneous) Regulations. It should be
noted that GSO-RT-2 tubing is suitable for gas pressures
(c) steel pipe shall be of a type approved by the Gas up to 50mbar only (*510mm water gauge). Where gas
Authority; and pressure exceeds 50mbar (see 2.3.5) then tubing shall be
in accord with a recognised standard (e.g. BS 3212 Type 2
(d) flexible tubing shall be of a type approved by the Gas or equivalent).
Authority (high pressure BS3212 Type 2 or equivalent).
*5 10mm W.G. = 5kPa
2.3.9.3 Adequate support shall be provided to pipework within the
chamber to take the weight of disconnected pressure regula-
tors during exchange of LPG cylinders.
 3. Fixed Gas Appliance Installations 3.1.5.2 All low pressure flexible tubing used for this purpose shall be
of a type approved by the Gas Authority (e.g. GSO-RT-2) in
3.1 General Requirements accordance with Regulation 3 of the Gas Safety (Miscellane-
ous) Regulations. It should be noted that GSO-RT-2 tubing is
3.1.1 All gas appliances shall be installed in accordance with Part suitable for gas pressured up to 50mbar only (*510mm water
V (Gas Appliances) of the Gas Safety (Installation and Use) gauge). Where gas pressure exceeds 5 h b a r (see 2.3.5) then
Regulations by Registered Gas Installers who have obtained tubing accord with a recognised standard (e.g. BS
at least Class 6 registration. 3212 1Lpe 2 or equivalent).

3.1.2 Installation work shall comply with all relevant statutory *510mm W.G. = 5Wa
safety requirements. Where appliances incorporate electrical
components operating at mains voltage, work shall be 3.1.6 Ventilation
undertaken in accordance with provisions of the Electricity
Ordinance. Reference should be made to the Code of Practice 3.1.6.1 Adequate ventilation must be available to ensure ready supply
for the Electricity (Wiring) Regulations issued by Hong Kong of fresh air for wmbustion and safe removal of wmbustion
SAR Government. products in accordance with Regulation 23(1) of the Gas
Safety (Installation and Use) Regulations.
3.1.3 Gas appliances shall be installed so as to facilitate servicing
in accordance with Regulation 25 of the Gas Safety (Installa- 3.1.6.2 For those kitchen installations where natural ventilation is not
tion and Use) Regulations and shall not be located so as to sufficient, or not available, mechanical ventilation shall be
cause a fire hazard nor impede means of escape from a employed. A means shall be provided to ensure that the
building. mechanical ventilation system is always in operation when gas
appliances are in use.
3.1.4 Gas appliances should not be installed in contact with
combustible wall or floor surfaces and a minimum separation 3.1.6.3 Ventilation shall be provided in accordance with appliance
distance of 150mm (6 inches) may be allowed. Where it is not manufacturer's instructions to a recognised international
possible to achieve this separation distance, shielding with standard ag. BS 6644. (see 3.1.7.4)
non-combustible material is necessary if temperatures in
excess of 65°C are likely to be experienced in the vicinity of For mechanical ventilation systems
the gas appliance.
lm3 of LPG will require at least 30m3of fresh air for combus-
3.1.5 The final connection of appliances may be rigid, or flexible, tion and will produce approximately 33m3 of products for
depending upon appliance type and size. removal to open air by kitchen extract systems

I 3.1.5.1 Rigid metallic pipework shall consist of steel or copper 3.1.6.4 In addition to (3.1.6.3) above, adequate ventilation (e.g. 20-40
(compression) fittings to a recognised international standard air change per hour) must be provided to allow comfortable
(e.g. steel fittings to BS 1387, copper to BS 2871 Part 1). working conditions for occupants in kitchen areas etc. and
Rigid copper pipework shall not be used for connecting the proper removal of cooking odours, grease and steam.
moveable appliances to the gas supply.
3.1.7 Water Heating Appliances

3.1.7.1 Flueless gas water heaters shall not be installed within

premises for the purpose of providing hot water to comrner-
cia1 catering establishments.
3.1.7.2 Gas water heating appliances shall be installed in accordance CookingWood Warming Appliances Installed within
with the manufacturers' instructions and should preferably be Seating Areas . . .
flued independently to open air. Models rated less than 60kW
(input) should be installed in accordance with Gas Utilisation A gas isolation valve shall be provided in an easily accessible
Code of Practice 03 issued by the Gas Standards Office. position as near as possible to the point where the piped gas
supply enters the seating accommodation. The ONIOFF
3.1.7.3 Where independent flueing is not possible, the water heater indication and the undernoted instructions in Chinese and
flue may terminate inside the extract duct of a commercial English shall be prominently displayed, for the user:
kitchen mechanical ventilation system which discharges to
open air providing there is an interlock system to isolate the - "BEFORE TURNING ON GAS SUPPLY, ALWAYS
gas supply to the water heater in the event of extract fan CHECK THAT ALL GAS APPLIANCE TAPS ARE
failure or blockage, in accordance with Regulation 24(4) of CLOSED;
the Gas Safety (Installation and Use) Regulations.
- "SHUT OFF THE GAS SUPPLY AFTER USE".
3.1.7'4 Natural or mechanical ventilation for supplying air to a water
heater shall be in accordance with the manufacturer's All gas supply pipes inside the seating area, except the final
instructions to an international standard, such as BS 6644:- connection to each appliance, shall be rigid steel with screwed
joints, for example steel to BS 1387. Appropriate measures
(a) Natural Ventilation shall be taken to prevent corrosion where pipework is
installed in walls or floors in accordance with Regulation 17
low level: minimum 540cm2 + 4.5cm2kW in excess of of the Gas Safety (Installation and Use) Regulations
60kW total rated input.
All flexible tubing, connecting the gas appliance to the gas
high level: minimum 270cm2 + 2.25cm2kW in excess supply valve at the table shall be of an approved type (e.g.
of 60kW total rated input. GSO-RT-2).

(b) Mechanical Ventilation The gas supply pressure to tables inside the seating area must
not exceed 300mm water gauge.
The system shall provide at least 1.1 litreslsecond of input1
output air per kW total rated output of gas (see 3.1.6.3). Gas appliances ,shall be installed so as to facilitate ease of
servicing and shall:
3.18 Safety Controls
3.2.5.1 incorporate an automatic means of ignition
3.1.8.1 All gas and flow controls employed shall be designed and e.g. piezo spark;
constructed to recognised international safety standards.
3.2.5.2 incorporate a pilot protected by a flame failure

3.1.8.2 Gas catering appliances which have enclosed combustion device.

chambers, or of a type which prevent burner flame@)being

easily observed by the user, shall incorporate flame protection. Additional ventilation must be provided within the seating
area to ensure adequate supply of fresh air for combustion
3.13.3 The gas supply to catering appliances which incorporate gas1 and safe removal of combustion products (see 3.1.6.3) in
pressurised air pre-mix systems shall be protected by the accordance with Regulation 23(1) of the Gas Safety (Installa-
installation of a non return valve in the inlet supply pipework. tion and Use) Regulations Means shall be provided to ensure
mechanical ventilation, installed for this purpose, is always in
operation when appliances are being used.
3.3 Cookinglpood Warming Appliances Installed at 4. Portable Gas Appliances
Serving Counters in RestauranWShopping Centres
Dim sum trolleys
3.3.1 All gas supply pipes at the sewing counter, except the final
connection to moveable appliance, shall be rigid steel with
screwed joints, for example steel to BS 1387. Appropriate
measures shall be taken to prevent corrosion where pipework The trolley to be used for food warming, shall be fabricated
is installed in walls or floors in accordance with Regulation in a workmanlike manner. No combustible material shall be
17 of the Gas Safety (Installation and Use) Regulations used in the construction of the trolley nor placed inside the
appliance. It shall be constructed such that it remains in a
3.3.2 All flexible tubing, connecting a gas appliance to the gas stable upright position at all times during normal use. The
supply valve(s) at the serving counter shall be of an approved base of the trolley shall not be enclosed.
type (e.g. GSO-RT-2).
There shall be complete separation between the LPG cylinder
3.3.3 The gas supply pressure to the sewing counter area must not storage compartment and the gas burner compartment
exceed low pressure i.e. *300mm water gauge. (combustion chamber). The storage compartment shall be
installed below the combustion chamber and properly sealed
3.3.4 Gas appliances shall be installed so as to facilitate ease of from it so as to provide an effective heat shield and to prevent
sewicing and shall:- gas or liquid entering the storage compartment (Appendix 7).
The storage compartment shall incorporate an external door
3.3.4.1 incorporate an automatic means of ignition e.g. piezo which can be secured in the closed position so as to protect
spark; the installed gas equipment but must allow the user to gain
easy access all the times (Typical designs are shown in
3.3.4.2 incorporate a flame failure device. Appendix 8.)

3.3.5 Additional ventilation must be provided at the sewing counter Metallic gas pipe fittings shall be manufactured to recognised
area to ensure adequate supply of fresh air for combustion international standards and be securely connected by screw
and safe removal of combustion products (see 3.1.6.3) in threads, compression fittings, brazing or welding, but not by
accordance with Regulation 23(1) of the Gas Safety (Installa- capillary joints relying on soft solder or adhesives Installed
tion and Use) Regulations. gas fittings shall be sound.

For reasons of fire safety, dim sum trolleys containing LPG

cylinders should not be used in restaurant areas located below
ground level.

LPG Cylinder Storage Compartment

The cylinder storage compartment shall be open at the base

to ensure provision of ventilation but must be constructed to
ensure adequate support and protection for the LPG cylinder.

Compartment door(s) shall afford the user ready access for

easy exchange of LPG cylinder, inspection1 repair of installed
gas equipment and turning off gas supply in an emergency.
4.1.2.3 The compartment shall be designed to accommodate a 2kg 4.1.5 Gas Supply Pipes
LPG cylinder and regulator (section 4.1.3 and 4.1.4), flexible
gas tubing (section 4.1.5) and pipework connections. 4.1.5.1 Metallic Pipe Fittide

4.1.3 LPG Cylinder The metallic burner supply pipe shall terminate at a suitable
location within the storage compartment to facilitate the
The LPG cylinder shall be of a type approved by the Gas connection of flexible gas tubing. All pipe fittings shall be
Authority, possess a current test certificate for the five year manufactured to intemitional standards Capillary fittings
hydraulic test and be charged with LPG by a Registered Gas utilising soft aolder are prohibited, only screwed,
Supply Company in accordance with the Regulation 7 of the compression, or brazedlwelded fittings are permitted. The gap
Gas Safety (Gas Supply) Regulations Cap. 51. The water around the supply pipe where it passes through the wall of
capacity of the cylinder shall not exceed 4.8 litres (2kg LPG) the storage compartment must be sealed in accordance with
and must incorporate a pressure relief valve as required by (4.1.1). The supply pipe shall terminate within the storage
Regulation 9(c) of the Gas Safety (Gas Supply) Regulations compartment in the form of a standard nozzle for GSOIRTI2
Cap. 51. The cylinder valve shall be replaced by the rubber tubing or a screwed connection in the case of
Registered Gas Supply Company every two years. reinforced tubing.

4.1.4 LPG C y l i e r Regulator. 4.1.5.2 Flexible Tubing

4.1.4.1 The LPG regulator must be compatible with the LPG All flexible gas tubing used shall be of a type approved by the
cylinder supplied by a Registered Gas Supply Company. It Gas Authority (for example GSO-RT-2 ). Its length shall be
shall comply with Gas Utilisation Code of Practice GU09 kept to a minimum and it shall only be located within the
"Law pressure regulatorsfor supplying gas from LPG cylinders cylinder storage compartment which is sealed from the
having less than 40 litres water capacity" to include for combustion chamber. The tubing must be connected at each
example an integral, excess flow device. The excess flow end by means of proper securing clips or screwed
device shall be manufactured to recognised Industry safety connections as appropriate. .
standards; be factory set; and non adjustable by the user. The
regulator shall not incorporate an internal pressure relief 4.1.6 The Burner Compartment (Combustion Chamber)
valve.

4.1.4.2. The regulator shall be capable of being connected to the LPG

cylinder without the use of a tool such that the replacement The burner compartment shall be constructed to ensure safe
of a cylinder shall not require unscrewing of any gas fittings . combustion of gas (COIC02 ratio at flue outlet under
(GU09: rapid coupling type) . Additionally a valve cap, normal operating conditions does not exceed 0.004) by:-
designed to take cylinder pressure, shall be attached to the
cylinder, at all times such that the user can seal-off the (a) providing sufficient air for combustion from the opening
cylinder valve outlet in the event of leakage. at the compartment base:

(b) minimising burner flame impingement on the under side

of the water trough

(c) providing adequate ventilation to remove combustion

products, by means of an integral flue. The flue outlet
(5000 mm2 minimum) shall be designed to prevent
blockage by dim sum containers etc or incorporate a
warning label to advise the user that the opening must be
kept clear.
4.1.6.2. The Gas Burner 4.1.7.4 Flame failure device

(a) The compartment shall only contain one burner which The flame failure device shall be manufactured to an
shall be manufactured to an international standard and international standard (for example JIS 2103) and may be an
be correctly adjusted to burn LPG (approx. 700% butane1 integral part of the user's control valve. It must be installed in
30% propane) distributed in Hong Kong. accordance with (4.1.6.1) above.

(b) The burner and connections, including spark igniter and 4.1.8 Data Plate
flame failure thermocouple, shall be firmly secured. I A data plate shall be securely located on the trolley displaying
(c) The burner shall be located in a position which minimises
direct flame impingement upon the base of the water
I the serial number, maker's name, address and date of
manufacture.
trough.
4.1.9. Safety Notice
(d) The diameter of the burner jet orifice shall not exceed
User instructions (Appendix 9), to ensure safety of s t d and
0.9 mm to operate at an inlet gas pressure not exceeding
customers, shall be adhered to the trolley at all times so as to
300mm W.G.
be easily read by the user. In particular LPG cylinders shall
only be exchanged by persons properly trained for this duty
4.1.7 User and safety controIs
in a well ventilated location without naked flames being
present. Cylinders must not be exchanged within the seating
4.1.7.1 General.
area of a restaurant.
The gas flow controls shall incorporate a flame failure device
4.1.10 Commissioning
and automatic (spark) ignition. The respective flame detection
and spark probe shall be securely and conveniently mounted A Registered Gas Contractor shall undertake to certify:
adjacent to the burner but the control valve shall not be
installed within the combustion chamber. The controls must 4.1.10.1 Prior to connecting the gas supply,
also be protected from radiated heat and from accidental
impact damage. There shall be a means to ensure the user can (a) all gas pipework and associated gas fittings are sound at
detect whether the water level in the trough is adequate in 1.5 x normal working pressure i.e. there is no leakage.
order to avoid overheating of the appliance.
(b) there are adequate provisions for ventilation and safe
4.1.7.2 Users control tap removal of combustion products (4.1.6.1)
b (c) all gas fittings are secured and in accordance with (4.1.5)
The user's control tap shall incorporate a valve manufactured
to an international standard (for example JIS2103) and must (d) the burner jet orifice is of the correct diameter (4.1.6.2)
incorporate automatic spark ignition. It shall be located at a
convenient position such that the burner flame is visible by (e) all warning labels and instructions are present (4.1.7.3
the user during the ignition process The tap shall be clearly and 4.1.9)
marked to show on and offpositions
4.1.10.2 Subsequent to connecting gas supply,
4.1.7.3 Users instruetiom
(a) normal working pressure is (286300) mm water gauge
User instructions shall be left with the responsible person for (b) the igniter is functioning satisfactorily
the premises in accordance with regulation 26 of the Gas
Safety (Installation and Use) Regulation Cap. 51. (c) the COIC02 combustion ratio does not exceed 0.004
after 5 minutes of operation at normal gas rate (4.1.6.2(d))
 (d) all gas flow controls, including flame failure device, are I 4.2.2.2 The store shall not be located below ground level.
operating correctly
I
4.2.2.3 The store shall not be located above, or in the immediate
4.1.11 Annual Safety Check vicinity of, drains

Dim sumlfood warming trolleys shall be checked for safe 4.2.2.4 The store shall not be located within a restaurant seating area
operation annually by a Registered Gas Contractor in nor within a designated means of escape from a building.
accordance with section (4.1.10) above and proper written
records must be kept for this purpose (Appendix 10). Flexible 4.2.2.5 The store shall not breach any fire separation structure within
rubber tubing shall be replaced as necessary but not exceeding a building.
a period of 3 years. The cylinder valve shall be checked for
compliance with (4.1.3) 4.2.2.6 The store shall be located at least 2 metres away from a fixed
source of naked flame.
4.1.12 Storage of LPG Cylinders I
4.2.2.7 The store shall be constructed of concrete, or any material
All LPG cylinders, when not installed, should be stored in having at least two hour fire resistance (BS 476) and sufficient
accordance with the requirements of Sections 2.3.6, 2.3.7 and mechanical strength to protect stored cartridges.
2.3.8 of this guide.
4.2.2.8 Door(s) shall be provided to the store being a material having
4.2 Disposable LPG Cartridges and Cassette Cookers at least one hour fire resistance (BS 476). The door(s) shall
normally be locked.
4.2.1 General
4.2.3 Ventilation of Store
4.2.1.1 Disposable LPG cartridges used in Hong Kong must be of a
type approved by the Gas Authority in accordance with 4.2.3.1 The ventilation openings of a store shall normally communi-
Regulation 7 of the Gas Safety (Gas Supply) Regulations. cate with open air and shall not be directed into adjacent
buildings; designated means of escape from buildings; indoor
4.2.1.2 Where the aggregate water capacity of LPG cartridges stored seating areas; nor any hazardous areas
in premises exceeds 130 litres, (Appendix 1) then prior
approval of the Gas Authority for construction and use is 4.2.3.2 The store shall be vented (wherever possible directly to open
required in accordance with Regulation 3 of the Gas Safety air) by natural or mechanical means Ventilation shall be
(Gas Supply) Regulations. provided at low and high level. In the case of mechanical
ventilation, the extract opening shall be at low level and the
4.2.1.3 Disposable LPG cartridges shall be kept in a dry, well fresh air intake opening shall be at high level.
ventilated store when not in use, in accordance with sections
4.2.2 to 4.2.5. The operator shall ensure stock rotation of low level 100 cm2 free area, or 11100th of the store floor
cartridges to avoid prolonged storage. For reasons of fire area, whichever is the greater.
safety the total water capacity of containers stored should not
exceed 28 litres (Appendix 1). high level 50 cm2 free area, or 11200th of the store floor
area, whichever is the greater.
4.2.2 Location and Construction of Store

4.2.2.1 The store should always be located in open air wherever

possible, or may be located within a building provided that
adequate ventilation is available (see 4.2.3).
 Mechanical Ventilation the system shall be capable of 5. Testing and Commissioning of New Installation Work
providing 25 litres, of air per second, or 5 litres, per second
per sq. meter of the store floor area, whichever is the greater. 5.1 Gas Installation Pipework and Flow Controls
The extract duct shall be at low level and the fresh air duct at
high level; all electrical equipment to be flame proof to an 5.1.1 Inlet service gas pipework, upstream of a primary meter; or
international standard for example BS 4683. pipework upstream of a service regulator (primary meter not
installed); shall be tested and purged in accordance with
4.2.3.3 A store located within, or adjacent to a kitchen area, may be
Regulations 20 and 23 of the Gas Safety (Gas Supply)
vented directly into the kitchen, or an area which does not
Regulations.
conflict with 4.2.3.1 providirg such an area is itself well
ventilated directly to open air and aggregate water capacity of
5.1.2 Internal installation gas pipework, downstream of a primary
containers does not exceed 28 litres. High and low ventilation
meter (carcassing); or low pressure internal pipework down-
should be provided in accordance with 4.2.3.2.
stream of a service regulator (primary meter not installed);
4.2.4 Warning Notice
shall be tested and purged in accordance with Regulation 20
of the Gas Safety (Installation and Use) Regulations
A permanent notice shall be prominently displayed on the
door(s) of the store in Chinese and English characters: 5.1.3 Soundness testing and purging shall be carried out generally in
accordance with the procedures outlined in Section 6 of the
- "LPG CARTRIDGES"; LPG Industry of Hong Kong Standard Practice Manual
Volume 1. In the case of an LPG cylinder chamber installation
- "NO SMOKING OR NAKED FLAMES".
incorporating a manifold arrangement, the high pressure
stage shall be tested in accordance with' BS 5482 : Part 1
4.2.5 Cassette Cookers
4.2.5.1 For reasons of fire safety cassette cookers should not be used 5.1.4 During soundness testing procedures the undernoted shall be
within commercial premises below ground level e.g. basement observed:-
kitchens, seating areas, etc.
5.1.4.1 All newly installed low pressure pipework, downstream of
4.2.5.2 Cassette cookers should not be used within, or at serving primary meter or service regulator (including appliance
counters forming part of enclosed air-conditioned main connections) shall be isolated and tested for leakage at 1.5
public walkways of commercial buildings having two or more times normal operating pressure.
storeys, if such areas are designated as means of escape in the
event of fire. 5.1.4.2 No pressure drop shall be observed during the soundness test,
after a period has been allowed for temperature stabilisation
4.2.5.3 Areas in which cassette cookers are permitted for use shall be
(in the case of larger installations; 5-15 minutes).
well ventilated (3.1.6.3 refers) so as to ensure:-
(a) sufficient fresh air for gas burning appliance; 5.1.4.3 Test duration, and results, shall be recorded on a job
(b) safe removal of products of combustion; document.
(c) safe dispersal of LPG in the event of leakage.
5.1.4.4 Where sections, isolated for soundness testing, are reconnected
4.2.5.4 Cassette cookers containing LPG cartridges shall be stored in to an existing gas supply then such joints shall be properly
accordance with section (4.2.2) whilst not in use. Replace- tested for leakage by leak detection fluid. Additionally any
ment of cartridge must be carried out in accordance with exposed pipework joints which may be located in corridors,
manufacturers' instructions. etc. shall be rechecked with leak detection fluid.

5.1.4.5 If leakage is detected at any stage, (5.1.4.1) to (5.1.4.4),

defects must be repaired and the test repeated until the
installation is sound.
 Appendix 1
5.1.5 Before commencing purging procedures the undernoted shall
be observed:- , Water Capacity of LPG Containers and permitted numbers
5.1.5.1 Inert Purging of New Piped Installations
(not exceeding 130 litres)

Inert gas purging, using nitrogen or carbon dioxide, shall be

carried out for new installations having lOOmm (4 inch)
diameter pipework or above, or where the total installation
volume (see Appendix 9) exceeds 0.59m3 (21 ft3). Direct
purging (using LPG) is a permitted for such installations.

5.1.5.2 Direct Purging of New Piped Installations

For small installations, having pipework diameters not

exceeding 75mm (3 inch) a total installation volume (see
Appendix 9) not exceeding 0.59m3 (21ft3), direct purging
using LPG may be undertaken. However, this is Q&
permissable when conditions allow purge burning (flaring) at
the purge point, and shall be undertaken subject to precau-
tions outlined in the LPG Supply Industry of Hong Kong
Standard Practice Manual Volume 1.

5.2 Gas Appliances

5.2.1 Gas appliances shall be tested and commissioned in accord-

ance with Regulation 30 of the Gas Safety (Installation and
Use) Regulations. If gas is not available at the time of
appliance installation, means shall be provided to ensure
compliance with Regulation 30(3).

5.2.2 Testing and commissioning of appliances shall be carried out

as directed by the appliance manufacturer to included:-

Soundness check i.e. no leakage;

Correct operating pressure;

Safe ignition;

(d) Adequate ventilation (3.1.6 and 3.1.7 refer);

(e) Safe removal of combustion products (3.1.6 and 3.1.7
refer);
( f ) Correct operation of all gas flow controls to include
thermostats and flame failure devices, etc.

5.2.3 Users' instructions and maintenance requirements provided

by the appliance manufacturer shall be left with the responsi-
ble person(s) for the premises in accordance with Regulation
26 of the Gas Safety (Installation and Use) Regulations.
 Appendix 2.1 Appendix 2.2
Example 1: Location of fire safety Example 2: Location of fire safety valve
valve inside premises external to premises. Single gas supply to
(Service riser supplying more than one customer)
restaurant (GIF level or above).
(Service riser supplying more than one customer)
Shopping arcadelcommon corridor
Shopping arcadelcommon corridor

External Wall
Service Rise1

Acceh\ible Fire Safely Ga\ Valve

(see Section 2.2 9 ) Service Regulator \

Venl~latedMetal Box
Of requ~rvd) for Protection
GROUND/PODIUM LEVEL
(Open Air)
 Appendix 2.3
Appendix 2.4
Example 3: Location of fire safety valve
Example 4: Location of fire safety
external to premises. Single gas supply to
valve close to kitchen exitlentrance
(Service riser supplying more than one customer

restaurant on GIF or podium level.

and unable to install fire safety valve outside kitchen)

(Fire safety and emergency control valves can be a single valve in this situation)

Shopping arcadelcommon corridor

LIIT LOBBYESCAPE ROUTE

-i Notice giving location of

SHOP
I Gas Meter (if rewired) vu I

Emergency Control
(see Section 1.2.8) x 11
Service R i w r d ABOVE GROUND/PODIUM
.. . LEVEL

(OpenAir) -\
Emergency controlffire Safety Gas Valve
(Valve must be close to kitchen door for easy access)

/ Service Regulator
/-
(if required)

Gas Meter (if required)

(see Section 2.2.1 1)
(OpenAir)

(see Section 2.2.9)

 Appendix 3 Appendix 4
Typical LPG Cylinder Storage Chamber Location and Ventilation of

r High Level Vents

c
LPG Cylinder Storage Chamber

OPEN AIR
INSIDE CHAMBER

BUILDING

DOORS
Location (see
Section 2.3.5)
+
I I

4.1 Chamber Located in Open Air / Venting into Open Air

Concrete or Steel INSIDE OPEN AIR

Construction (see BUILDING
Low Level Vents Section 2.3.6.7)
+
I (see Section 2.3.7.4a)
/ I
Pressure shall DOORS

not exceed I psi

(tight seal)

*(see Section
+
I I

I
I I

4.2 Chamber Located inside Building / Venting into Open Air

WELL-VENTILATED

KITCHEN
OPEN AIR

1 \ ~ o t i c e (see \ Paved Floor (not lower

I
I
Appendix 6.1) than ground level)

I
* Please refer to Section 2.3
I

L
I

4.3 Chamber Located inside Building / Venting into Kitchen

(permitted only under conditions specified in section 2.3.7.3)
A * Please refer m Section 23.6 and 23.7
 Appendix 5 Appendix 6.1
Gas Flow and Pressure Controls for
Notices for LPG cylinder Storage Chamber
(see 2.3.8.2)
LPG Chamber Installation

Instructions For The Safe Exchange Of LPG Cylinders

CHAMBER
Pipc Support Pre\\ure Gauee 1. Extinguish all naked flames in the vicinity. Turn off gas appliances.
2. Turn off all branch valves and LPG cylinder valves.
3. Disconnect the pigtails or the cylinder regulators.

i+ I T o Appliances
4. Replace with the new LPG cylinders.
5. Re-connect the pigtails or cylinder regulators.
6. Check that there is no smelllsound of gas leaking from the cylinder connection.
7. Re-open all branch valves and LPG cylinder valves.

Appendix 6.2
Notices for LPG cylinder Storage Chamber
I

I ' 5.1 Using Low Pressure Cylinder Regulators

'he Safe Use of LPG
(see 2.3.8.3)

CHAMBER I. Before leaving or when the gas is not in use, please turn off all the branch

Pipe Support Pressure Gauge

valves and the cylinder valves.

2. Always keep the chamber doors unobstructed and closedllocked (external chamber) when

exchange of cylinders is completed.

3. Do not store flammable substances in the vicinity of the LPG cylinders.

Non-return
4. Be alert to deal with gas leakage at any time. If in doubt, turn off the

valve emergency valve and cylinder valves. Keep the area well-ventilated and call

Appl~ances the gas supply company immediately. Extinguish any naked flames but do not

Service operate electrical switches.

Regulator

00-

Valbe The 24-hour Emergency Telephone numbers of your gas supply company is as

&T \ Hixh
Pressure follows:

Ruhher Tublng

1
(Approved gas distributor to provide telephone number)

case of emergency, call (999).

I
1 ' 1 5.2 Using High Pressure Regulator and Service Regulator 1
1 A k e a s e refer to Section 2.3.9 -
 Appendix 7 Appendix 8
Schematic Diagram of Dim Sum Trolley Typical Examples of Dim Sum Trolley
I. General View - -- - ~-

Flue Outlet
\'-. :J'I+I irWfl I:IO-
Flexible gad tqbing inside

Low level venuldllon

(ope11a1 base) for burnel
cornparlmelil
- Cornparunen! low level
ventllallon (open a1 base)

3. LPG Cylinder C o m ~ a r m e ~ t , , 3,2 *) I

' , I 1 ] I ] y/pf:
i

Alr Inlet

Rapid coupling type

cyl~nderregulalot
mcorporaliag excess 1
I valve replace every 2 yean

flow devlw
 Appendix 9 Appendix 10
Table %Typical Example of Dim Sum Trolley Safety Iqfrpgction Record
Safety Notice (Section 4.1.11)
Registered Gas Contractor: Address :

I Guidelines on Safe Use

(i) Replacement of LPG cylinders shall only be carried out by properly trained personnel in a
Customer:
Dim Sum Trolley
Manufacturer .
I
Date of
Address :

manufacture :
I
Serial No,:
,
>"
well-ventilated location which is away from the seating area of a restaurant. This location
must not be in the vicinity of naked flames and high temperature and should be in open air Location :
whenever possible. Visual Inspection Satisfactory Actl6h 'R&&

1 LPG Cylinder x Kg
73''
(ii) Before replacing a cylinder, turn off its valve/regulator.
2 Cylinder valve (shall be replaced every 2 years)
I
'

(iii) The cylinder should be kept in an upright position as it is installed.

(iv) Ensure that all c o n n e c t i o n s ~ c l a m ~joints
s e have been tightened properly.
I 3 Rubber tubing : Manufacture date
(To be replaced after 3 years at most)
0
:.'

.-
4 Regulator: Manufacture Date Model

(v) Care must be taken when turning on the valves, or regulators, of the cylinder (To be replaced in accordance with manufacturer's guidance)

5 Hose-clip connections
I
I
(vi) Check for leaks by listening and smelling. If in doubt, apply soapy water on
6 Heat shield between burner & gas control valves

connectiondjoints and the location where leakage is suspected. If bubbles are found, it
7 Flame inspection opening

means gas is leaking out.

8 User's instructions/label
I
I
9 Data plate

(vii)If a gas leak or a fault in LPG installations or pipework is detected, close the cylinder
10 Fire extinguisher(s)readily available in seating area

valvedregulators immediately. Do not operate any electrical switches. Keep the location

well-ventilated, and call the gas supplier immediately

Dimensional Check

11 Flue free exhaust area (5 000mm2minimum)

(* See (B) below). 12 Burner jet orifice diameter (shall not exceed 0.9mm)
'
'
I

13 User's control tap operation

14 Ignition performance and condition

15 Flame stability

Warning 16 Pilot performance and condition CI -.

17 Flame Failure Device (FFD) performance and condition 0
(A) Never attempt to repair any faulty regulator or cylinder valve by yourself, contact your gas 18 Soundness test on gas installation
0
supplier. 19 Leakage test for water tray

(B) If a gas leak cannot be stopped, move the cylinder to an open area immediately and
Note : Only dim sum trolleys which comply with COP GU06 should be used. . ._-:
urgently call Emergency Services on 999 and the gas supplier.
, .,
Action required (if any) 1 .

(C) If the burner cannot be ignited after three attempts, don't try to ignite it again until

unburnt LPG is dispersed.

Note: As LPG dim-sum and food warming trolleys containing LPG cylinders are potentially

hazardous, they should not be used anywhere below ground level.

Customer's signature:

I 1understand the content of the above

Registered Gas Installer's signature:

Registration Number:
II
recommendations and certify that the Date of safety check:

safety check has been completed.

 Appendix 11 Appendix 12
LPG Cylinder Draw-off Rates Volumes of Installation Pipework

The possible vaporisationldraw-off rate from a cylinder depends on many factors, Pipe Volume (cubic metres)
SI Units
such as air temperature, amount of LPG remaining in the cylinder, pattern of usage, and regulator
capacity. The designer will need to ensure that a safe continuous supply of gas to the appliances
can be maintained at all times.

As a rough guide, the following figures, which will vary according to conditions,
may be referred to when designing an installation:
- -

Cylinder Full Cylinder 50% full 50% full

Size Peak Rate Cylinder Rate Cylinder Rate
1&16 kg 3.0 kg/hr 1.6 kg/hr 1.2 kg/hr

(Note: Reduced draw-off rates will be encountered in the winter months because of lower air
temperatures.)

Design Ratings of Typical Appliances

- Imperial Units Pipe Volume (cubic feet)
Low Pressure Appliance Nominal Design (full-load)
LPG Consumption Rate
Hotplates (per ring) 0.3 kg/hr
Cooking RangelRing Burner 0.35-0.95 kghr
(per burner)
Stockpot Unit (per burner) 1.8-2.9 *kg/hr
Food Steamer (per burner) 2.1-3.3 *kg/hr
Wok Range (per burner) 2.9-4.4 *kg/hr
Meat Roaster 4-5 kg/hr*
* Combinations of these highly-rated appliances should normally be supplied by an NGI or
piped gas supply capable of sustaining the gas consumption.

(Note: Actual consumption rate will depend on manufacturer's design. Diversity factors and part-
loading may be considered when calculating the required gas consumption.)