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  1. wintermute2008

    ASTM A672 Radiographic Examination Classes X1, X2

    Hello, The ASTM Standards book, Iron and Steel Products, Volume 01.01, Section 9 (Radiographic Examination), of the specification for A672, refers to "Classes X1 and X2". I can not seem to find the definition of these classes. Can someone point me in the right direction... Thank you.
  2. wintermute2008

    B16.5 over pressure issue

    Hi all, I have an older corporate standard that talks about the design pressure that is to be used for flanges, and that this pressure is 110% of the fluid system design pressure. It states that "B16.5 does not allow for variations in pressure in excess of the rated pressure..., e.g. relief...

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