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Recent content by chrisrich

  1. chrisrich

    Leak Testing ESDVs in HC Service

    Can anyone tell me the leak rate allowed during hydrotest for an emergency shutdown valve (16") in hydrocarbon (Methane) Gas Riser/Pipeline Service
  2. chrisrich

    PSV Sizing on Separators

    Well figured, you must be good, I did have the HP separator wrong - it is 450psi - the LP was correct at 160. Of interest, would you allow a check valve upstream of any PSV or would you insist on a block valve. I know a block is obviously better, but check valves have been fitted and will be...
  3. chrisrich

    PSV Sizing on Separators

    Thanks for all your help, to answer some of the questions above The separation is oil & gas, HP only 600psi, LP 160psi (operating). Gas goes eventually to compression via heat exchangers, oil goes to oil treater vessel. There is a blowdown line to flare on the separators. The system is HP/LP...
  4. chrisrich

    PSV Sizing on Separators

    If I have two vessels (Hp & LP Separator) separated by a an Emergency Shutdown Valve and a Flow Control Valve, do I need to size the PSV on the downsteam vessel of the two (LP Separator)to accommodate a gas blowby from BOTH vessels
  5. chrisrich

    double block and bleed

    what is the view on using a single block valve with a DPE (double piston effect) instead of using conventional DB&B valve arrangements. How does the double piston effect work. does it provide 3 genuine levels of safety similar to conventional DB&B valves [/b]
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