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  1. KD007

    SA-193 Gr.B7M bolt material used in Wet H2S service is not passing requirement of UG44b clause.

    Hello All, I have to design high pressure vessel as per Div 1 for wet H2S service in which bolt material requirement is to use 'M' grade material for bolt i.e SA-193 Gr.B7M. However when using UG44b for flange derating the B7M bolting is not fulfilling the requirement of having higher allowable...

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