PSV system interlock application
PSV system maintenance operation in operation equipment, whether on land or at sea, to ensure pressure relief channel is unblocked during any time scope in work period. General pipe equipment has release system, maintenance operation at same time maintain continuous production.
Pipe system which has two or more safety relief valve generally there is break valve in up and down end for every safety relief valve. Must ensure shut off valve which in spare pipeline open, then could close shut off valve on pressure relief valve in operation pipe line. Special when distance between pressure relief and shut off valve is far or couldn’t see mutual, sequence problem for safety operation will become more acute，Various API and ASME specification all acknowledge
this harmful thing, and suggest to use valve safety interlock to eliminate producing harm.
Interlock application for transceiver in pigging station
With more and more pipe construction project, long-distance pipeline construction、operation and management will become one of importance works for domestic oil company.
long-distance pipeline general load high pressure or toxic and harmful substance according to different conveying medium. During pipe pigging, pig assembly and remove must intervention operation manual, and this process must correct isolation through receiver and launcher, pressure release and discharge operation, working personnel could safely open blind plate.