Stud Welds in ASME Section VIII-1 Pressure Vessel
Stud Welds in ASME Section VIII-1 Pressure Vessel
(OP)
Hello all,
I would like to seek your insights on the topic of welding non-pressure bearing attachments, which do not have a load carrying function, to pressure parts. Specifically, I am interested in understanding whether such welding should be exclusively performed by an ASME Certificate Holder.
The scenario I have in mind involves stud welding between a pressure vessel shell and a small stud that is not subjected to stress due to pressure. The welding process in question employs an automatic stud welding machine.
Based on my understanding of ASME VIII-1 UW-28(c)(2), it appears that procedure qualification testing is not required for this type of weld. However, I am uncertain whether the welding itself must be conducted by an ASME Certificate Holder.
I would greatly appreciate your input on this matter and kindly request that you provide references to the relevant Code paragraph, if possible.
Thank you in advance for your assistance.
I would like to seek your insights on the topic of welding non-pressure bearing attachments, which do not have a load carrying function, to pressure parts. Specifically, I am interested in understanding whether such welding should be exclusively performed by an ASME Certificate Holder.
The scenario I have in mind involves stud welding between a pressure vessel shell and a small stud that is not subjected to stress due to pressure. The welding process in question employs an automatic stud welding machine.
Based on my understanding of ASME VIII-1 UW-28(c)(2), it appears that procedure qualification testing is not required for this type of weld. However, I am uncertain whether the welding itself must be conducted by an ASME Certificate Holder.
I would greatly appreciate your input on this matter and kindly request that you provide references to the relevant Code paragraph, if possible.
Thank you in advance for your assistance.
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RE: Stud Welds in ASME Section VIII-1 Pressure Vessel
Not sure if this helps but,
Even though a Procedure Qualification is not necessary per UW-28(c)(2), a WPS and subsequent WPQ's are mandatory in accordance with UW-29(b). As a matter of fact, the Welding Operators have to re-qualify at the beginning of each shift and certified records have to be kept.
RE: Stud Welds in ASME Section VIII-1 Pressure Vessel