### Gas Safety (Gas Supply) Regulations 《氣體安全 (氣體供應)規例》

14. Testing and examination of vaporisers
(1) The owner of a vaporiser shall not use the vaporiser to vaporise liquefied petroleum gas unless the vaporiser has been tested and examined not less than once—
(a) in the case of a direct-fired vaporiser, within the 12 months period immediately preceding such use; and
(b) in the case of any other vaporiser, within the 5 years period immediately preceding such use,
to ascertain whether the vaporiser is safe to be so used.
(2) The owner of a vaporiser shall keep a written record of the results of any test and examination carried out on the vaporiser pursuant to subregulation (1) until the vaporiser ceases to be used to vaporise liquefied petroleum gas.
(3) Where any test and examination carried out on a vaporiser pursuant to subregulation (1) shows that the vaporiser is not safe to be used to vaporise liquefied petroleum gas, the owner of that vaporiser shall not so use the vaporiser unless work has been subsequently carried out on the vaporiser which renders the vaporiser safe to be so used.
(4) Any test and examination carried out before the commencement* of the Ordinance on a vaporiser provided for a gas installation, in accordance with the terms and conditions endorsed on a licence to store liquefied petroleum gas in that gas installation granted under the Dangerous Goods Ordinance (Cap. 295), shall be deemed to be a test and examination carried out on that vaporiser in accordance with subregulation (1).

Editorial Note:
* Commencement date: 1 April 1991.

15. Application
For the purposes of this Part, gas pipe (氣體喉管) shall not include an installation pipe.

16. Only competent persons to carry out work on or in relation to gas pipes
No person shall carry out any work on or in relation to a gas pipe unless he is—
(a) competent, by virtue of his training and substantial practical experience, to carry out that work; or
(b) under the supervision of a person to whom paragraph (a) applies.

### Gas Safety (Gas Supply) Regulations 《氣體安全 (氣體供應)規例》

18. Enclosed gas pipes
(1) No person shall install any part of a gas pipe through a floor or standing of solid construction unless the pipe is enclosed in a sleeve which does not prevent the normal movement of the pipe.
(2) No person shall install any part of a gas pipe through a wall of solid construction unless, so far as is reasonably practicable, the pipe is so constructed and installed as to be protected against failure caused by movement.
(3) No person shall install any part of a gas pipe in the cavity of a cavity wall unless the pipe—
(a) is to pass through the wall from one side to the other by the shortest practicable route; and
(b) is enclosed in a gastight sleeve which—
(i) prevents, so far as is reasonably practicable, gas passing along any space between—
(A) the pipe and the sleeve; and
(B) the sleeve and the cavity wall; and
(ii) does not prevent the normal movement of the pipe.

19. Protection of premises
No person shall install a gas pipe in a way which would impair the structure of any premises or impair the fire resistance of any part of its structure.

20. Pressure tests on gas pipes, etc.
(1) A person who installs a gas pipe shall, forthwith after such installation and before the pipe is commissioned, carry out a pressure test on such pipe to ensure that it is structurally sound and gastight.
(2) A person who carries out a pressure test required under subregulation (1) on a gas pipe shall ensure that precautions have been taken to protect—
(a) the persons carrying out such test;
(b) any persons working in the vicinity of the place where such test is being carried out; and
(c) members of the public,
against any dangers which may arise if such pipe should fail the test.
(3) Upon the completion of any pressure test required under subregulation (1), the person who carried out that test shall, as soon as is reasonably practicable, reduce to zero the pressure in the gas pipe in respect of which such test was carried out.

### Gas Safety (Gas Supply) Regulations 《氣體安全 (氣體供應)規例》

21. General safety requirements for pressure-regulating installations
(1) Subject to subregulation (2), no person shall install a pressure-regulating installation in a gas supply system unless—
(a) the installation is so designed that the malfunction of any part thereof, where there is no other malfunction at the same time of any other part thereof, does not cause an unsafe situation to arise in respect of the pressure of the gas supplied downstream of that installation;
(b) any pressure-regulators or auxiliary systems used in connection with the installation are protected from any dust or debris carried by the gas supplied through the installation;
(c) where the difference in pressure between the gas supplied to the installation and the gas supplied by the installation is such that the temperature of the gas may fall below 0° centigrade, the installation is protected against damage which may be caused by the formation of ice inside or outside the installation;
(d) the volumetric capacity of the installation is such that it can take, at the lowest pressure at which gas will be supplied to it, and transmit, at the highest pressure at which it will supply gas, the volume of gas required for the gas supply system of which it is a part; and
(e) where a by-pass is fitted to the installation, devices are also fitted to the installation to ensure that if there is a mal-operation of any valve fitted to that by-pass, an unsafe situation does not arise in respect of the pressure of the gas supplied downstream of that installation.
(2) Subregulation (1) shall not apply to a pressure-regulating installation which will not be supplied with gas at a pressure other than low pressure.

### Gas Safety (Gas Supply) Regulations 《氣體安全 (氣體供應)規例》

22. Location of pressure-regulating installations
(1) Subject to subregulation (4), no person shall install a pressure-regulating installation at a location other than such that—
(a) any gas released from any relief valve used in connection with the installation will be safely dispersed;
(b) there is reasonable access for the purpose of carrying out maintenance on the installation;
(c) the installation will, so far as is reasonably practicable, not be subject to flooding, subsidence or other natural hazards unless it is, so far as is reasonably practicable, protected from damage which may be caused to it thereby; and
(d) if it is located near a road, it is, so far as is reasonably practicable, protected against damage to it which may arise from a traffic accident on that road.
(2) No person shall install a pressure-regulating installation in a room in any premises (and irrespective of whether there is any other room in the premises) unless—
(a) there is sufficient space within the room to permit maintenance of the installation;
(b) there is sufficient means of egress from the room to permit, so far as is reasonably practicable, the escape of personnel from the room if the installation becomes unsafe;
(c) each common wall of that room is gastight;
(d) each wall of that room is of solid construction;
(e) the room is well-ventilated; and
(f) explosion relief measures other than explosion relief panels are provided in the room.
(3) No person shall install a pressure-regulating installation in a location below the ground unless—
(a) the location is not subject to flooding or, if the location is subject to flooding, the pressure-regulator breathers used in connection with the installation are extended above the level at which flooding is likely to occur such that water will not enter the diaphragm chambers of the installation; and
(b) the location is in the form of a pit which is so designed and constructed that—
(i) it (and any surface covering) is able to withstand any expected surface loading without damage to the installation;
(ii) the ingress of surface water is prevented or, if not prevented, will not damage the installation; and
(iii) means are provided to permit access for maintenance and ventilation of the pit.
(4) Subregulation (1) shall not apply to a pressure-regulating installation which will not be supplied with gas at a pressure other than low pressure.