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  1. Vdubb98

    ASTM/ASME SA-193 P-Number ????

    I'm writing a weld procedure to tack a Nut (SA-193 gr. B7) to a valve indicator body. I have the P-number for the valve body but there is no p-number listed for SA-193 gr. B7. Can I do an equivalency for SA-193 based on chemical composition and if so what is the criteria? Thank you very much...

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