36
37
THIRD SCHEDULE
NON-FORTABLE CARBON Dioxide Fire ExtinguisheRS,
[Teg. 36)
(1) Every carbon dioxide fire extinguisher, other than a portable fire extinguisher, provided in compliance with these regulations shall be pro- vided with cylinders constructed in accordance with any one of the follow- ing specifications of the British Standards Institution-
Numbers B.S. 401: 1931.
B.S. 1287: 1946.
B.S. 1288: 1946.
(2) Each cylinder shall be provided with an internal discharge tube and a valve to release the gas.
(3) The extinguisher referred to in paragraph (1) shall be provided with a discharge hose which shall be reinforced so as to withstand a pressure of at least 1,300 pounds per square inch when the necessary couplings are fitted.
(4) The bore of the discharge hose referred to in paragraph (3) sball not be less than the sizes respectively set forth in the following table-
Capacity of extinguisher.
35 lb.
100 lb.
Minimum bare of discharge hose.
inch. inch,
(5) The discharge hose shall be provided with a hom which shall be of electrically non-conducting material and of a design which will reduce the velocity of the gas discharged.
(6) The metal part of the operating handle shall be suitably sheathed to protect the hands of the operator from extreme cold.
(7) At any comperature between 60°F. (IS°C.) and 63°F. (18°C) inclusive, the extinguisher shall discharge gas at such a rate that carbon dioxide equal in weight to ✈ of the capacity of the container will be dis charged in the periods respectively set forth in the following table-
Capacity of extinguisher.
35 lb. 100 lb.
Period.
30 to 45 seconds. 60 to 90 seconds.
(8) The outside of the extinguisher shall be clearly and permanently marked in accordance with Section Four of the specification of the British Standards Institution Number B.S. 3326; 1960.
FOURTH SCHEDULE.
BREATHING APPARATUS.
[reg. 42.)
1. Every breathing apparatus provided in compliance with these regulations may be either-
(c) a smoke helmet or a smoke mask, each of which shall be pro-
vided with an ait pump or bellows and an air hose; or
(b) a self-contained breathing apparatus,
Smoke helmet and smoke mask.
* (1) Every smoke helmet or smoke mask provided in compliance with these regulations shall be provided with a hose for the supply of air from the outside atmosphere.
(2) An air pump or bellows shall be provided which shall be suitable for pumping air through the hose referred to in sub-paragraph (1).
(3) Such hose shall be of the noncollapsing type and shall be sufficient in length to enable the air pump or bellows to be on the open deck in clean air well clear of any batch or doorway while the wearer of the helmet or mask is in any part of the accommodation, service, cargo or machinery spaces,
(4) Efficient couplings shall be provided if two or more lengths of hose are to be joined in order to reach the aforesaid spaces.
(5) The air inlet to the pump or bellows shall be so protected as to ensure that the supply of air cannot be obstructed.
Self-contained breathing apparatus.
3. (1) Every self-contained breathing apparatus provided in com- pliance with these regulations shall be of the open circuit compressed air type.
(2) The storage capacity of the compressed air cylinder or cylinders attached to the apparatus and carried by the wearer shall be at least 1,200 litres (42 cubic feet) of free air. The storage cylinders shall be constructed of suitable material and shall be of efficient design and of sufficient strength to withstand with an adequate factor of safety the internal air pressure to which they may be subjected, and each cylinder shall be capable of with- standing a test by hydraulic pressure suitably in excess of the maximum working pressure,
(3) Means shall be provided for the automatic regulation of the air supply to the wearer of the apparatus in accordance with his breathing requirements when he is breathing any volume of Free air of up to 85 litres (3 cubic feet) per minute at any time when the pressure in the supply cylinder or cylinders is above 150 pounds per square inch. Means shall be provided for overriding the automatic air supply valve.
(4) A pressure gauge with an anti-bursting orifice shall be incorporated in the high-pressure air supply system to enable the wearer to read directly and easily the pressure of air to the supply cylinder or cylinders
(1) Meana shall be provided for warning the wearer audibly when 80 per centum of the usable capacity of the apparatus has been consumed.
(6) The maximum weight of any such apparatus shall not exceed 35 lb. excluding any life-line and, if they do not form an integral part of the apparatus, any safety belt or harness.
(7) Every self-contained breathing apparatus shall be provided with fully charged spare cylinders having a spare storage capacity of at least 2,400 litres (84 cubic feet) of free air except that-
(*) If the ship is carrying five sets or more of such apparatus the Lotal spare storage capacity of free air shall not be required ta exceed 9,600 litres (336 cubic feet); or