Schedule Sch 3 - Navigation (Fire Appliances) Regulations 1968 - Carbon-dioxide fire extinguishers

Schedule 3 Carbon-dioxide fire extinguishers

(regulation 61 (2))

(1) A carbon-dioxide fire extinguisher shall be provided with cylinders constructed in accordance with approved standards.

(2) Each cylinder shall be provided with an internal discharge tube and a valve to release the gas.

(1) A carbon-dioxide fire extinguisher shall be provided with a discharge hose reinforced so as to withstand a pressure of 12.4 megapascals when the necessary couplings are fitted.

(2) The bore of the discharge hose shall be not less than the size specified in the following table in relation to the capacity of the extinguisher:

Capacity of extinguisher	Minimum bore of discharge hose
Not more than 4.5 kg .........................	6 mm
More than 4.5 kg but not more than 15 kg ...........	9 mm
More than 15 kg ............................	12 mm

(3) The discharge hose shall be provided with a horn that is insulated and of a design that will reduce the velocity of the gas discharged.

At any temperature between 10 Celsius and 21 Celsius inclusive, a carbon-dioxide fire extinguisher shall be capable of discharging gas at such a rate that carbon-dioxide equal in weight to three-quarters of the capacity of the container will be discharged in the period set forth in the following table in relation to the capacity of the extinguisher:

Capacity of extinguisher	Period in seconds
Not more than 4.5 kg .........................	20
More than 4.5 kg but not more than 15 kg ...........	35
More than 15 kg ............................	70

The outside of a carbon-dioxide fire extinguisher shall be clearly and permanently marked with a statement setting out —

(a) the name of the vendor of the extinguisher;

(b) instructions for operating the extinguisher;

(d) the year in which the extinguisher was manufactured.

Sch 3Carbon-dioxide fire extinguishers