All cargo tanks should be provided with a pressure relief
system appropriate to the design of the cargo containment system and
the cargo being carried. Hold spaces, interbarrier spaces and cargo
piping which may be subject to pressures beyond their design capabilities
should also be provided with a suitable pressure relief system. The
pressure relief system should be connected to a vent piping system
so designed as to minimize the possibility of cargo vapour accumulating
on the decks, or entering accommodation spaces, service spaces, control
stations and machinery spaces, or other spaces where it may create
a dangerous condition. Pressure control systems specified by chapter 7 should be independent of the pressure
relief valves.