Addition and deletion of backing in ASME IX
Addition and deletion of backing in ASME IX
(OP)
Hi all,
In ASME IX QW 253, deletion of a backing in a weld joint design is considered Non-essential, does that mean that
1. If the procedure is qualified with a backing, you can weld without backing
2. If the procedure is qualified without backing, you can weld with a backing
3. The main question is, I have a procedure qualified without a backing, and there's a need to weld with a sleeve to protect internal coating, does that require re-qualification or the sleeve can be used based on this part of the code;
Thanks a lot.
In ASME IX QW 253, deletion of a backing in a weld joint design is considered Non-essential, does that mean that
1. If the procedure is qualified with a backing, you can weld without backing
2. If the procedure is qualified without backing, you can weld with a backing
3. The main question is, I have a procedure qualified without a backing, and there's a need to weld with a sleeve to protect internal coating, does that require re-qualification or the sleeve can be used based on this part of the code;
Thanks a lot.





RE: Addition and deletion of backing in ASME IX
RE: Addition and deletion of backing in ASME IX
2. Yes.
3. No, per metengr
RE: Addition and deletion of backing in ASME IX
2. Yes.
3. Probably doesn't require requalification, but a little more info will help. What kind of weld does the sleeve require?
RE: Addition and deletion of backing in ASME IX
@DVWE the weld is butt stick welding, and the backing is a tuboscope sleeve that's used to protect internal coating.
RE: Addition and deletion of backing in ASME IX