H 20
[Subsidiary]
Fire main, water service pipes and hydrants.
CAP. 281] Merchant Shipping (Fire Appliances) Regulations.
[1969 Ed.
Provided that when more fire pumps operated by power than are required by these regulations are provided in any ship, the Director may permit the capacity of any such additional fire pumps to be less than 80 per centum.
(6) Every fire pump required by these regulations which is operated by power shall be capable of producing from any fire hydrant or hydrants in the ship, at least the minimum number of jets of water required by these regulations as appropriate to the class and tonnage of the ship, while maintaining the pressure required by paragraph (2) of regulation 33.
(7) Relief valves shall be provided in conjunction with all fire pumps if the pumps are capable of developing a pressure exceeding the design pressure of the fire main, water service pipes, hydrants and hoses.
(8) Such relief valves shall be so placed and adjusted as to prevent excessive pressure in any part of the fire main system.
(9) Every centrifugal pump which is connected to the fire main shall be fitted with a non-return valve.
(10) In every ship of Groups 1 and 2 to which these regulations apply, every emergency fire pump shall be situated in positions aft of the ship's collision bulkhead.
33. (1) In every ship which is required by these regulations to be provided with fire pumps operated by power, the diameter of the fire main and of the water service pipes connecting the hydrants thereto shall be sufficient for the effective distribution of the maximum discharge required by these regulations from--
(a) where only one pump is required by the regulations, that pump; or
(b) where two such pumps are so required, both pumps operating simultaneously; or
(c) where more than two such pumps are so required, the two largest of such pumps operating simultaneously:
Provided that in any ship other than a passenger steamer the diameter of the fire main and of the water service pipes shall be required to be sufficient only for the discharge of 140 tons per hour.
(2) When the fire pumps required by these regulations are discharging the quantity of water required by paragraph (1) through adjacent fire hydrants in any part of the ship from nozzles of sizes specified in regulation 34 the following minimum pressure shall be capable of being maintained at any hydrant-
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H 20
[Subsidiary]
Fire main, water service pipes and hydrants.
CAP. 281] Merchant Shipping (Fire Appliances)
Regulations.
【1969 Ed.
Provided that when more fire pumps operated by power than are required by these regulations are provided in any ship, the Director may permit the capacity of any such additional fire pumps to be less than 80 per centum.
(6) Every fire pump required by these regulations which is operated by power shall be capable of producing from any fire hydrant or hydrants in the ship, at least the minimum number of jets of water required by these regulations as appropriate to the class and tonnage of the ship, while maintaining the pressure re- quired by paragraph (2) of regulation 33.
(7) Relief valves shall be provided in conjunction with all fire pumps if the pumps are capable of developing a pressure ex- ceeding the design pressure of the fire main, water service pipes, hydrants and hoses.
(8) Such relief valves shall be so placed and adjusted as to prevent excessive pressure in any part of the fire main system.
(9) Every centrifugal pump which is connected to the fire main shall be fitted with a non-return valve.
(10) In every ship of Groups 1 and 2 to which these regu- lations apply, every emergency fire pump shall be situated in positions aft of the ship's collision bulkhead.
33. (1) In every ship which is required by these regulations to be provided with fire pumps operated by power, the diameter of the fire main and of the water service pipes connecting the hydrants thereto shall be sufficient for the effective distribution of the maximum discharge required by these regulations from--
(a) where only one pump is required by the regulations, that
pump; or
(b) where two such pumps are so required, both pumps
operating simultaneously; or
(c) where more than two such pumps are so required, the
two largest of such pumps operating simultaneously:
Provided that in any ship other than a passenger steamer the diameter of the fire main and of the water service pipes shall be required to be sufficient only for the discharge of 140 tons per
hour.
(2) When the fire pumps required by these regulations are discharging the quantity of water required by paragraph (1) through adjacent fire hydrants in any part of the ship from nozzles of sizes specified in regulation 34 the following minimum pressure shall be capable of being maintained at any hydrant-
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