> For machinery spaces nozzle size shall obtain the maximum pressure from two jets from the smallest pump. > For accommodation and service spaces nozzle size >12mm need not be used > Standard nozzle shall be 12mm, 16mm and 19mm > In passenger ships, at least one fire hose for each hydrant. 25m for open decks on ships max breath>30m > Fire hose length of at least 10m, but not more than, > Fire hoses of approved non-perishable material and be sufficient length to project a jet of water to any of the space required. Hydrant valves fitted in fire mains should be designed to open with an anti-clockwise rotation of the hand wheel. > They should be fitted with a valve for controlling the discharge. Pillar Hydrants, Fire Hose/Hose with Cabinets, Fire hose Reel/Hose Reel With Cabinets, Empty Fire Cabinets, Stand Pipe key and bar, Landing Valves, Male and Female Coupling, Duck Foot Bend, Hose Reel Nozzles and Diffuser nozzles. > They should be positioned in such a way that the fire hose may be easily coupled to them. > Number and position of hydrants shall be such that at least two jets of water, not emanating from the same hydrant, one of which shall be from a single length of hose, may reach any part of the ship. > The maximum pressure at any hydrant shall not exceed that at which the effective control of a fire hose can be demonstrated. Fire Hose > Fire hoses of approved non-perishable material and be sufficient length to project a jet of water to any of the space required. > Pump should be able to deliver water at a continuous pitot tube pressure of at least 3.4bar at least two fire hose nozzles that are connected to the highest two fire hydrants on the unit.Ĥ,000 gross tonnage and upwards 0.40 N/mm2Ħ,000 gross tonnage and upwards 0.27 N/mm2 Hydrant valves fitted in fire mains should be designed to open with an anti-clockwise rotation of the hand wheel.
A Fire Main System must have at least two independently driven fire pumps
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