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Recent content by sandstars

  1. sandstars

    API 520 Multiple PSV Clarification

    Not sure how to edit posts but forgot to mention we're upgrading the pump's impeller to compensate for the pressure losses at the higher flow rates.
  2. sandstars

    API 520 Multiple PSV Clarification

    Thanks to everyone for the feedback! You certainly brought to light a few things I hadn't thought of (sometimes, I get so focused on the pressure and flow ratings, I forget about things like chatter). So maybe explaining the system would help. Then again, maybe it'll just be more confusing...
  3. sandstars

    API 520 Multiple PSV Clarification

    I have 2 PSVs that protect the same vessel. One is 2J3, the other is 6R8. The vessel in question has a MAWP of 75 psig and both valves are set at 75 psig. We are running up against the relief flow rate (calculated using API 520 and 521 at 116% overpressure) and the lift pressure of the valves...
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