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  1. 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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