Standard Designation:
BPV Section IX
Edition/Addenda:
2013
Para./Fig./Table No:
QW-451 & QW-452.3
Subject Description:
ASME Section IX, Tables QW-451.1, QW-452.3 and Table QW-461.9. applicability to typical nozzle welds
Date Issued:
02/02/2015
Record Number:
14-2343
Interpretation Number :
Question(s) and Reply(ies):
Background: A 1.125 in. OD stub tube having a wall thickness of 0.180 in. is to be welded into a header having a wall thickness of 2.677 in. The weld detail will apply a partial penetration groove weld in combination with an external fillet weld such as shown in Fig. UW-16.1, sketch (u) of Section VIII, Division 1 (2013 Edition). The weld will be completed in the flat position by a welder qualified on a weld test coupon prepared using plate and welded in the 2G position.
Question (1): Do the procedure qualification limits of Table QW-451.1 require the WPS selected to deposit the weld joint described above to be qualified for a base metal thickness range (T) encompassing the thicknesses of both the stub tube and the header?
Reply (1): Yes. See also paragraph QW-202.2(b).
Question (2): Do the performance qualification limits of Table QW-452.3 and Table QW-461.9 require a welder assigned to deposit the weld joint described above to be qualified for small diameter welds in pipe or tube?
Reply (2): No.
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