ASME IX, QW-403.6
ASME IX, QW-403.6
(OP)
For a SMAW process according ASME IX, QW-403.6, a WPS qualified with a test coupon of 7.5mm thickness qualifies 15mm thickness? Between thickness of 6 and 15mm how should we interpret QW-403.6?
Thanks in advance
Luis Marques
Thanks in advance
Luis Marques





RE: ASME IX, QW-403.6
RE: ASME IX, QW-403.6
RE: ASME IX, QW-403.6
According QW-253 a change in qualified thickness is an essential variable. According QW-403.6 the minimum base metal thickness is T of the test coupon or 16mm. For T less than 6mm the minimum test thickness qualified is T/2.
Bellow 16mm down to 6mm the minimum qualified thickness is also T/2? In other words A WQR with a qualified test coupon of 7.5mm can be used to weld all the thickness from 7.5mm up to 15mm?
Thank you for the empathy
Luis Marques
RE: ASME IX, QW-403.6
If yes, QW-403.6 is treated as an essential variable, and as such, the minimum thickness qualified for impact testing is T (coupon thickness) or 5/8", whichever is less. If the thickness of the weld coupon is less than 1/4", the minimum thickness qualified is 1/2 of T. The limitation does not apply if PWHT results in a re-heat treatment of the base material.
If No - QW-403.6 does NOT apply.
RE: ASME IX, QW-403.6
RE: ASME IX, QW-403.6
Agree with Stanweld (material)