7.3.3(a) General. All piping systems are to be tested in the presence of the Surveyor under working conditions after installation and checked for leakage. Where necessary, other techniques of tightness test in lieu of a working pressure test may be considered.
7.3.3(b) Specific Systems. The following piping systems are to be hydrostatically tested in the presence of the Surveyor after installation to 1.5P, but not less than 4 bar (4.1 kgf/cm2, 58 psi)