ASTM/ASME SA-193 P-Number ????
ASTM/ASME SA-193 P-Number ????
(OP)
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 for any assistance you can provide!
Jake, E.I.T.
Jake, E.I.T.





RE: ASTM/ASME SA-193 P-Number ????
RE: ASTM/ASME SA-193 P-Number ????
BTW, we had a fairly serious injury sometime back because the shop had taken it upon itself to weld two -B7 studs together end-to-end to make a longer one for drawing some parts together or something like that. It let go when no-one was ready. Welding studs together is not permitted these days.
Regards,
Mike
RE: ASTM/ASME SA-193 P-Number ????
I would recommend an ASTM A 194 2H carbon steel nut (P-No 1) to tack weld on the valve indicator body, versus a low alloy grade nut. If you decide to use a stud instead of a nut, go with a carbon steel grade stud versus Grade B7.
RE: ASTM/ASME SA-193 P-Number ????
Jake