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RE: Coke Drum PSV's

Home Forums Coking Technical Fractionation & Process Process Coke Drum PSV's RE: Coke Drum PSV's



To avoid potential high H2S content backflow from Blowdown Header, since PSVs are not considered TSO valves. PSV MOVs must be closed before top unheading; the interlock is with Vent valves, so it can be closed only when Vent valves are open, and vent valves can not be closed unless PSV MOVs are open.

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