scope:

These rules apply to piping systems, including valves, fittings and pumps, which are necessary for the operation of the main propulsion plant together with its auxiliaries and equipment. They also apply to piping systems used in the operation of the vessel whose failure could directly or indirectly impair the safety of vessel or cargo, and to piping systems which are dealt with in other parts of the rules.

Cargo pipelines on vessels for the carriage of chemicals in bulk are additionally subject to the provisions of Pt.6 Ch.1 Sec.2

 Cargo and process pipelines on vessels for the carriage of liquefied gases in bulk are additionally subject to the provisions of Pt.6 Ch.1 Sec.1 and Pt.6 Ch.1 Sec.3.