This document gives the requirements for plates, sections, pipes, forgings, castings and
weldments used in the construction of cargo tanks, cargo process pressure vessels, cargo and process
piping and secondary barriers. This document also gives the requirement for plates and sections of hull
structural steels which are subject to reduced temperature due to the cargo and which are not forming part
of secondary barrier. (See G1 para. G1.9.1 and G1.9.4).