ASME IX QW-288.1 says "A change in 1

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ASME IX QW-288.1 says "A change in the weld joint configuration (beyond the manufacturing tolerance) such as the addition or deletion of preplaced filler metal, an increase in the depth of the groove, a decrease in the groove angle, or a change in the groove type."

Please help me to understand that what is the criteria to determine beyond the tolerance limit?

Increase in depth of groove, does it mean if I have a WPS qualifies on 3mm grove depth I am eligible to weld from 1 to 3mm groove depth but not more then that?

 

[Fizza453]

Say tube to tubesheet joint is groove plus fillet welded (see figure UW-20.1, sketch c or d).
Drawing shows that groove is V-Type (45 degree, say) and depth is 3 mm plus 0.2 and minus 0.1 mm.
Now, you qualify PQR with 3 mm groove depth. The qualification range would be as follows:
groove depth: 3 mm max. (but you can go to 3.2 mm because you are within the manufacturing tollerances)
Groove type: V, 45 degree minimum, if drawing shows 45 degree plus minus one degree, then you can even go to 44 degree because you are within the manufacturing tollerances.

Please also see 5th paragraph of the Foreword.
Any further comments shall be highly appreciated.

Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN