### Gas Safety (Installation and Use) Regulations 《氣體安全(裝置及使用)規例》

1. Citation
(E.R. 3 of 2022)(1) These regulations may be cited as the Gas Safety (Installation and Use) Regulations.
(2) (Omitted as spent—E.R. 3 of 2022)

2. Interpretation
In these regulations, unless the context otherwise requires—
domestic gas appliance (住宅式氣體用具) means a gas appliance which is designed, or intended, to be used primarily in domestic premises, irrespective of whether it is so used;
emergency control (緊急控制閥) means a valve for shutting off the supply of gas in an emergency;
flue (煙道) means a passage for conveying the products of combustion from a gas appliance to the external air, and includes any part of the passage in a gas appliance ventilation duct which serves the purpose of a flue;
flue pipe (煙道管) means a pipe forming a flue, but does not include a pipe built as a lining into a chimney or a gas appliance ventilation duct;
gas supply company (氣體供應公司) means a gas supply company within the meaning of the Gas Safety (Registration of Gas Supply Companies) Regulations (Cap. 51 sub. leg. E); (E.R. 3 of 2022)
isolation valve (切斷閥) means a gas valve which may be used to stop the supply of gas downstream of such valve;
low pressure (低壓) means a pressure of not more than 7.5 kPa;
meter box (氣體錶箱) means a receptacle or compartment designed and constructed to contain a gas meter and gas fittings used in connection with such meter;
operating pressure (操作壓力), in relation to a gas appliance, means the pressure of gas at which it is designed to operate;
pressure test point (試壓點) means a gas fitting to which a pressure gauge can be connected;
shut off (切斷), in relation to the supply of gas, includes disconnecting the supply of gas and ceasing to supply cylinders; (L.N. 222 of 1999)
work (工程) means gas installation work within the meaning of the Gas Safety (Registration of Gas Installers and Gas Contractors) Regulations (Cap. 51 sub. leg. D). (E.R. 3 of 2022)

### Gas Safety (Installation and Use) Regulations 《氣體安全(裝置及使用)規例》

3. Application
(1) Subject to subregulation (2), these regulations shall apply to the reinstallation of a gas fitting in any premises as they apply to the installation of a gas fitting in any premises.
(2) Where a gas fitting has been installed in any premises before the commencement* of these regulations such that, if such fitting had been so installed on or after that commencement, there would have been a contravention of any provision of these regulations, there shall be deemed not to be such a contravention of any such provision in relation to the reinstallation of such fitting in the premises following—
(a) the removal of such fitting for the purpose of carrying out maintenance on it; or
(b) the removal of such fitting necessitated by work (other than work as defined in regulation 2) carried out in or in relation to the premises.

Editorial Note:
* Commencement date: 1 April 1991.

4. Materials and workmanship
(1) No person shall install a gas fitting unless every part of it is of good construction and sound material and of adequate strength and size to secure safety.
(2) Without prejudice to the generality of subregulation (1), no person shall install in any premises a gas pipe which is—
(a) made of lead or lead alloy; or
(b) made of a non-metallic substance unless it is—
(i) connected to—
(A) a readily movable gas appliance designed for use without a flue; or
(B) a portable cylinder; and
(ii) not more than 2 metres in length.
(3) No person shall carry out work in relation to a gas fitting otherwise than in a proper and workmanlike manner.

### Gas Safety (Installation and Use) Regulations 《氣體安全(裝置及使用)規例》

5. General safety precautions
(1) No person shall carry out work in relation to a gas fitting in such a manner that gas could escape unless steps are taken to prevent any escape of gas which constitutes a danger to any person or property.
(2) No person carrying out work in relation to a gas fitting shall leave such fitting unattended unless every incomplete gasway has been sealed so as to be gastight or such fitting is otherwise safe.
(3) A person who disconnects a gas fitting shall seal off each outlet of each gas pipe to which it was connected so that each such outlet is gastight.
(4) No person carrying out work in relation to a gas fitting which involves exposing gasways which contain or have contained flammable gas shall smoke or use any source of ignition unless those gasways have been purged so as to remove all such gas or have otherwise been made safe from risk of fire or explosion.
(5) No person searching for an escape of gas from a gas fitting shall use any source of ignition.
(6) Where a person carries out work in relation to a gas fitting which might affect the gastightness of the gas supply system of which such fitting is a part, he shall immediately thereafter test such system for gastightness at least as far as the nearest gas valves upstream and downstream in such system.

6. Protection against damage
(1) A person installing a gas fitting shall ensure that each part of it is so supported, and so placed or protected, as to avoid any undue risk of damage to such fitting.
(2) No person shall install a gas fitting if he has reason to suspect that foreign matter may block or otherwise interfere with the safe operation of such fitting unless he has fitted a filter or other like protection to the gas inlet of, and any airway in, such fitting.
(3) No person shall install a gas fitting in a position where it is likely to be exposed to any substance which may corrode it unless such fitting is—
(a) constructed of materials which are inherently resistant to being so corroded; or
(b) otherwise protected against being so corroded.

7. Existing gas fittings
(1) No person shall make any alteration to any premises which would affect a gas fitting installed in the premises in such a manner that, if such fitting had been so installed after the alteration, there would have been a contravention of any provision of these regulations.
(2) No person shall do anything which would affect a gas fitting, or a flue or means of ventilation used in connection with such fitting, in such a manner that the subsequent use of such fitting constitutes a danger to any person or property.