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    Classification of Swing Check Valve Opening Type per API 6D Clause 4.4

    Hello, I'm relatively new to this topic, so please excuse me if my question seems basic — I just want to make sure I understand the standard correctly. We have a swing check valve designed in accordance with API 6D. I’m trying to correctly classify the valve under clause 4.4 (Valve Opening...
  2. I

    Hardfacing overlay welding - Procedure qualification

    I have a WPQR for GMAW overlay welding, filler mat AWS/ASME SFA - 5.21 ERCCoCr-A and base material WCB. and I have welder qualifications of this WPQR. However, customer needs filler material to be AWS/ASME SFA - 5.21 ERCCoCr-E. If every essetial variables are same and only change is the filler...

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