Section 18 in The Merchant Shipping (Cargo Ship Construction And Survey) Rules, 1974
18. Boiler feed system.
(1)In every ship, every boiler which provide services essential for the safety of the ship and which could be render dangerous by the the failure of its feed water supply, shall be provided with no less than two efficient and separate feed water systems so arranged that either of such systems may be opened for inspection or overhaul without affecting the efficiency of the other. In every such system means shall be provide which will prevent over-pressure in any part of the system.(2)If in any ship a possibility of oil entering the feed water system exists, the arrangements for the supply of boiler feed water shall provide the interception of oil in the feed water.(3)Every feed check valve, fitting or pipe through which feed was passes from a pump to such boilers shall be designed and constructed withstand the maximum working stresses to which it may be subjected, with a factor of safety which is adequate having regard to the material of why it is constructed and the working conditions under which it will be us. Every such valve, fitting or pipe shall, before being put into service for the first time, be subjected to a hydraulic test suitably in excess of the maximum working pressure of the boiler to which it is connected or of the maximum working pressure to which the feed line may be subjected, whichever is greater, and shall be maintained in an efficient condition.(4)The feed pipes referred to in sub-rule (3) shall be adquately supported.
