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  1. Mohsen579

    Allowable pressure drop when testing valves per API 6D

    I am witnessing class 600 valve hydrotests (per API 6D) at around 2500 psi (customer required pressure) at the manufacturer shops. The valve size is normally between 4 to 12 inches so the test duration is between 2 to 15 minutes. There is a 2-10 psi pressure drop most of the times with no...

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