SAFETY OF LIFE AT SEA C73 



Regulation 56 



Pumps, Water Service Pipes, Hydrants and Hoses 



(a) Total Capacity of Fire Pumps 



(i) In a passenger ship, the required fire pumps shall be capable of 

 delivering for fire fighting purposes a quantity of water, at the appropriate 

 pressure prescribed below, not less than two-thirds of the quantity required 

 to be dealt with by the bilge pumps when employed for bilge pumping. 



(ii) In a cargo ship, the required fire pumps, other than the emergency 

 pump (if any), shall be capable of delivering for firefighting purposes a 

 quantity of water, at the appropriate pressure prescribed, not less than four- 

 thirds of the quantity required under Regulation 18 of this Chapter to be 

 dealt with by each of the independent bilge pumps in a passenger ship of the 

 same dimensions, when employed on bilge pumping. In place of the definitions 

 covering L, B and D referred to in paragraph (/) of Regulation 18 of this 

 Chapter, the following shall apply: — 



L= length between perpendiculars. 

 B=greatest moulded breadth. 

 D=depth to bulkhead deck amidships. 



Provided that in no cargo ship need the total required capacity of the fire 

 pumps exceed 1 80 tons per hour. 



(b) Fire Pumps 



(i) The fire pumps shall be independently driven. Sanitary, ballast, bilge 

 or general service pumps may be accepted as fire pumps, provided that they 

 are not normally used for pumping oil and that if they are subject to occasional 

 duty for the transfer or pumping of fuel oil, suitable change-over arrangements 

 are fitted. 



(ii) Each of the required fire pumps (other than any emergency pump 

 required by Regulation 65 of this Chapter) shall have a capacity not less than 

 80 per cent, of the total required capacity divided by the number of required 

 fire pumps — and shall in any event be capable of delivering at least the two 

 required jets of water. These fire pumps shall be capable of supplying the 

 fire main system under the required conditions. 



Where more pumps than required are installed their capacity shall be to 

 the satisfaction of the Administration. 



(iii) 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 water service pipes, hydrants and" hoses. These valves shall be so 

 placed and adjusted as to prevent excessive pressure in any part of the fire 

 main system. 



Ch. 2 



