Joint qualification
Joint qualification
(OP)
If we qualify a procedure on a CJP bevel groove, does it also qualify all grooves except square grooves? I am referencing table 4.5 #31. Also, is it not correct that the only backing for pre-qaulified joints is steel? Ceramic would require Clause 4 qualifications?





RE: Joint qualification
5.10 Roots of groove or fillet welds may be backed by copper, flux, glass tape, ceramic, iron powder or similar matls.
RE: Joint qualification
AWS D1.1-2010 has clarified this requirement per clause 3.13.2.
Any WPS that utilizes backing other than steel does require qualification per clause 4.
Best regards - Al
RE: Joint qualification
However, this is not true of corner and T joints. See 4.10.1.1.
If you qualify your CJP single bevel groove weld using your corner and T joint geometry to be used in production however, then you are qualified for all groove details complying with 3.12 or 3.13, including T and corner joints, excluding square grooves, and within the limitations of Table 4.5 #33 if you move outside of the prequalified joint details.
For future reference, this is all based on the 2010 Edition.