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

13. Gas meters—emergency notices
(1) No person shall supply gas through a primary meter installed after the commencement* of these regulations unless he ensures that a notice in permanent form, in the English and Chinese languages, is prominently displayed on or near such meter—
(a) indicating that the consumer should—
(i) shut off the supply of gas immediately in the event of an escape of gas in the consumer’s premises;
(ii) where any gas continues to escape after the supply of gas has been shut off, immediately give notice of the escape to—
(A) the Emergency Services, by dialling telephone number 999; and
(B) the gas supply company concerned or its agent; and
(iii) not re-open the supply of gas until all necessary steps have been taken to prevent gas from escaping again; and
(b) stating—
(i) the name of the gas supply company concerned or its agent; and
(ii) the emergency telephone number of the gas supply company concerned or its agent.
(2) Where a gas meter is installed in any premises at a distance of more than 2 metres from, or out of sight of, the nearest upstream emergency control in the premises, no person shall supply gas through such meter unless he ensures that a notice in permanent form, in the English and Chinese languages, is prominently displayed on or near such meter indicating the position of such control.

Editorial Note:
* Commencement date: 1 April 1991.

14. Primary meters
(1) No person shall install a prepayment meter as a primary meter through which gas is supplied to a secondary meter.
(2) Where a primary meter is removed, the person who last supplied gas through such meter before its removal shall—
(a) where such meter is not forthwith reinstalled or replaced by another primary meter—
(i) close any service valve which controlled the supply of gas to such meter and did not control the supply of gas to any other primary meter; and
(ii) clearly mark, in the English and Chinese languages, any live gas pipe in the premises in which such meter was installed to the effect that such pipe contains gas; and
(b) where such meter has not been reinstalled or replaced by another primary meter before the expiration of a period of 12 months commencing on and from the date of removal of such meter and there is no service valve referred to in paragraph (a)(i), ensure that the service pipe for the premises concerned is disconnected as near, so far as is reasonably practicable, to the gas main and that any part of such pipe which is not removed is sealed at both ends.

15. Secondary meters
A person supplying gas through a secondary meter shall ensure that a notice in permanent form, in the English and Chinese languages, is prominently displayed on or near the primary meter indicating the number and location of secondary meters installed downstream of the primary meter.

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

16. Safe use of installation pipes
(1) No person shall install an installation pipe in any position in which it cannot be used with safety having regard to the position of other pipes, drains, sewers, cables, conduits and electrical apparatus and to any parts of the structure of any premises in which it is installed which might affect its safe use.
(2) A person who connects an installation pipe to a primary meter installation in any premises shall, in any case where electrical cross-bonding may be necessary—
(a) for the purpose of facilitating such cross-bonding, provide an earth terminal on such pipe at a position not more than 600 millimetres downstream from such installation; and
(b) inform the responsible person for the premises that such cross-bonding should be carried out.
(3) The Authority may, by notice in the Gazette, vary the distance specified in subregulation (2)(a).

17. Enclosed installation pipes
(1) No person shall install any part of an installation pipe through a wall, floor or standing of solid construction unless such part is so constructed and installed as to be protected against failure caused by movement.
(2) No person shall install an installation pipe so as to pass through a wall, floor or standing of solid construction from one side to the other unless that part of such pipe within such wall, floor or standing, as the case may be—
(a) takes the shortest practicable route;
(b) in the case of a wall, is protected against corrosion by painting and is enclosed in a sleeve or is wrapped; and
(c) in the case of a floor or standing, is protected against corrosion by painting and is enclosed in a sleeve.
(3) No person shall install any part of an installation pipe in the cavity of a cavity wall unless such pipe—
(a) is to pass through such wall from one side to the other by the shortest practicable route; and
(b) is enclosed in a gastight sleeve and such pipe and such sleeve are so constructed and installed as to prevent, so far as is reasonably practicable having regard to subregulation (1), gas passing along any space between—
(i) such pipe and such sleeve; and
(ii) such sleeve and such wall.
(4) No person shall install an installation pipe—
(a) under the foundations of any premises; or
(b) in the ground under—
(i) the base of a load bearing wall; or
(ii) footings.
(5) No person shall install an installation pipe in an unventilated shaft, duct or void.

18. Protection of premises
No person shall install an installation pipe in a way which would impair—
(a) the structure of any premises; or
(b) the fire-resistance of any part of the structure.

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

19. Clogging precautions
No person shall install an installation pipe in which deposition of liquid or solid matter is likely to occur unless—
(a) a suitable vessel for the reception of any deposit which may form is fixed to such pipe in a conspicuous and readily accessible position; and
(b) safe means are provided for the removal of the deposit.

20. Testing and purging of installation pipes
(1) Where a person carries out work in relation to an installation pipe which might affect the gastightness of any part of such pipe, he shall immediately thereafter ensure that—
(a) such part is—
(i) tested to verify that it is gastight; and
(ii) examined to verify that it has been installed in accordance with these regulations; and
(b) after such testing and examination, a protective coating is applied to the joints of such part if such joints are likely to be exposed to any substance which may corrode them.
(2) Where gas is being supplied to any premises in which an installation pipe is installed and a person carries out work in relation to such pipe, he shall ensure that—
(a) immediately after complying with subregulation (1), purging is carried out throughout every installation pipe through which gas can then flow so as to remove safely all air and gas other than the gas to be supplied;
(b) immediately after such purging, if such pipe is not to be put into immediate use, it is sealed off at each outlet;
(c) if such purging has been carried out through a loosened connection, such connection is retested for gastightness after it has been retightened; and
(d) each seal fitted after such purging is tested for gastightness.
(3) Where gas is not being supplied to any premises in which an installation pipe is installed at a time when work is carried out in relation to such pipe, no person shall supply gas to the premises unless he has caused such purging and other work as is specified in subregulation (2) to be carried out.

21. Marking of installation pipes
(1) A person installing in any premises, elsewhere than in any domestic premises, a part of an installation pipe which is accessible to inspection shall permanently mark such part, in the English and Chinese languages, in such a manner that it is readily recognisable as part of a gas pipe.
(2) The responsible person for any premises in which a part of an installation pipe referred to in subregulation (1) is situated shall ensure that such part continues to be recognisable in accordance with that subregulation for so long as it is used for supplying gas.