Requirement for emergency fire pump on board as per SOLAS:
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- Capacity is not less than 40 % of the total required capacity of the fire pumps but in any case not less than 25 m3 / hr.
- Capable of delivering 2 jets of water with minimum pressure (at a 3rd hydrant – not a SOLAS requirement) 2.5 bar<6000 dwt, 2.7 bar> 6000 DWT
- The diesel power source of pump started in cold conditions of 0° C by hand or by power at least 6 times within a period of 30 minutes and at least twice within 1st 10 minutes.
- Tank to have sufficient fuel for at least 3 hours and reserve fuel outside the main machinery space to allow the pump to run for an additional 15 hours. (Total suction head and the net positive suction head of the pump to be such that they will provide for the required capacity and pressure under all conditions of list, trim, roll, and pitch likely to be encountered in service)
- No direct access between the engine room and the emergency fire pump. If access is provided, through an airlock.
- Isolation valves in tankers are to be fitted on the fire main on poop and tank deck at intervals not more than 40 meters to pressure the integrity of the fire main system.(Diameter of fire main: sufficient for maximum discharge from 2 pumps operating simultaneously except for cargo ships the diameter needs to be sufficient for a discharge of 140 m3 / hour.
not DWT it will be gross tonnage “2.5 bar 6000 DWT”