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  • Users: Pipingtop
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  1. Pipingtop

    Category D in B31.3

    Hi All, As I understand in B31.3 "Category D" piping can be applied ONLY when agreed with the Owner or Client otherwise most piping belongs to Normal Fluid. Much appreciated your response. Thanks
  2. Pipingtop

    NDT (radiography) and Hydrotesting

    Hi All, In order to comply with B31.3, do I need to carry out both hydrostatic testing and NDT (radiography) for a pressure piping system (say instrument air piping) or can I eliminate NDT and carry out hydrostatic testing only? please help Thanks

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