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  1. PDHPP

    Rever flow of Double Check Valves on discharge side of Pump and SV-Capacity on suction side

    Dear All, The interpretation of the new API-521 regarding the failure rate of two check valves in series (as 4.4.9.3) is leading to missunderstanding and need your technical support Foe example for the clean boiler feed water and high pressure BFW-Pump (50 Barg. discharge press.), asssuming...
  2. PDHPP

    Water Storage Tanks and Thermal Inbreathing acc. API-2000

    Thank you all for your reply
  3. PDHPP

    Water Storage Tanks and Thermal Inbreathing acc. API-2000

    Dear all, According API-2000-7th-Ed.: Is there a must to consider the thermal Inbreathing for water stored in an Un-Insulated Tank ? The Water Tank is equipped with Nitrogen-Blanketing line and has -5mBarg. Design-Vacuum Pressure. Thanks in advance
  4. PDHPP

    Does the PSV recalibration test at site necessary for all PSV types

    don1980 and e43u8: Thanks a lot for your reply.
  5. PDHPP

    Does the PSV recalibration test at site necessary for all PSV types

    Dear All, I'm a commissioning engineer and have a problem with my client at site regarding recalibration and/or live test of ALL PSVs. The client would like to see PSVs recalibrated at work-shop (before installation) or make a live test, if the PSVs already installed in a package unit like as...

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