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  1. S

    Pipe wall thickness calculation method for t≥D/6 or for P/SE>0.385

    Hello there, ASME B31.3 eq. (3a) or eq. (3b) below is for t＜D/6, while for t ≥ D/6 or for P/SE > 0.385, the standard only said “require special consideration of factors such as theory of failure,effects of fatigue, and thermal stress”. How should I calculate it when in this situation？ Thanks
  2. S

    How to choose pressure relief device for piping pneumatic leak test

    Hello guys, one question has confused me for a long time. As the requirement of ASME B31.3 345.5.2, a pressure relief device shall be provided during pneumatic leak test. 1. What cases will cause the test pressure to increase, the misoperation of pressure - raising equipment? Or uncontrolled...
  3. S

    Piping wall thickness calculation during hydrotest condition

    Hi，Forums Piping wall thickness calculation according ASME B31.3 is using the design pressure of pipeline，while the hydrotest pressure is at least 1.5×design pressure. The question is why B31.3 doesn't require to do the calculation check under hydrostatic test pressure？
  4. S

    Module and skid technical manager work study

    What is the work scope of technical manager? Take in charge all designers, arrange design works, or review plan & DOCs? Are there corresponding study courses or books? Thanks Sean
  5. S

    API 6A standard 10000psi ball valve material selection

    Can ASTM A-182 F316/316L material be used for ball valve body which follows API 6A standard and 10,000psi rating ? API 6A table-7 shows body material designations for pressure rating 69.0MPa(10,000psi) is 36K,60K,75K,NS while the yield strength of ASTM A-182 F316/316L is 205 MPa(30K). So this...

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