EVS-EN 764-7:2002

This European Standard specifies the requirements for safety systems which protect a vessel, a system of vessels, piping, accessories or assemblies from exceeding operating conditions. It is also applicable to safety related indicators and alarms, signals and warning devices when used in safety systems. Equipment connected together by piping of adequate capacity, free from potential blockages and which does not
contain any valve that can isolate any part from the safety system may be considered as a single pressure system when considering the requirements for overpressure protection.