ASME Sec VIII, Interpretation VIII-1-04-15
ASME Sec VIII, Interpretation VIII-1-04-15
(OP)
Did anyone happen to notice the interpretation referenced above? It seemed a bit strange in that I've always been under the impression that you couldn't jump more than one level of joint efficiency in adjoining welds. The way I see the case referenced in the interpretation, a Cat A with an E of 1 could intersect a Cat B with an E of .7.





RE: ASME Sec VIII, Interpretation VIII-1-04-15
I looked up interpretation VIII-1-04-15 (file BC03-1295) and did not find this information. According to my files, this interpretation deals with UG-46, Inspection Opening requirement for a vessel.
VIII-1-04-14 (file BC03-1657)is the one of interest. Yes.
RE: ASME Sec VIII, Interpretation VIII-1-04-15
RE: ASME Sec VIII, Interpretation VIII-1-04-15
I have never seen anything in ASME VIII that would suggest that "you couldn't jump more than one level of joint efficiency in adjoining welds". Nor have I had colleagues or AIs suggest that fact. I think you may have inherited a Code legend.
Steve Braune
Tank Industry Consultants
www.tankindustry.com
RE: ASME Sec VIII, Interpretation VIII-1-04-15
I was always under the impression in reading UW- 11 a)5 b) and UW-12 that one could move from column a to c for joint efficiency factors. The last sentence in UW-11 a)5 b) is key however, and indicates that spot RT of the weld intersection does not satisfy spot radiography examination requirements for the remainder of the weld. Thus you could have a Cat A Type 1 weld, E=1 intersect a Cat B weld having a joint efficiency factor of 0.7 (no RT) despite the spot RT of the weld intersection.