John,
Thanks,yes, I am also used to annual testing elswhere too,especially for offshore. The location is onshore Korea, and its a small Gas/condensate plant used as a gathering point for offshore. The equipment is the usual;slugcatcher,Inlet Separator, Mol Sieves,JT valve,condensate tower,gas compressor,gas fired hot oil heater,flare system.
Im trying to pursuade our maintenance dept. to check all the PSV's and Im not sure of their National requirements but would like to know other countries requirements.
veec