Section 15(3) in The Merchant Shipping (Cargo Ship Construction And Survey) Rules, 1974
(3)In every ship, where main or auxiliary machinery or any parts of such machinery are subject to internal pressure, such machinery or such parts shall, before being put into service for the first time, be subjected to a hydraulic test to a pressure suitably in excess of their working pressure having regard to---(a)the design and the material of which they are constructed;(b)the purpose for which they are intended to be used;(c)the working conditions under which they are intended to be used.
