QW 204.b ASME IX
QW 204.b ASME IX
(OP)
CAN ANY BODY EXPLAIN IT
(b) For GTAW, SMAW, GMAW, PAW, and SAW,
or combinations of these processes, a PQR for a process
recording a test coupon that was at least 1
⁄2 in. (13 mm)
thick may be combined with one or more other PQRs
recording another welding process and any greater base
metal thickness. In this case, the process recorded on the
first PQR may be used to deposit the root layers using
the process(es) recorded on that PQR up to 2t (for short-
circuiting type of GMAW, see QW-404.32) in thickness
on base metal of the maximum thickness qualified by the
other PQR(s) used to support the WPS. The requirements
of Note (1) of tables QW-451.1 and QW-451.2 shall apply.
(b) For GTAW, SMAW, GMAW, PAW, and SAW,
or combinations of these processes, a PQR for a process
recording a test coupon that was at least 1
⁄2 in. (13 mm)
thick may be combined with one or more other PQRs
recording another welding process and any greater base
metal thickness. In this case, the process recorded on the
first PQR may be used to deposit the root layers using
the process(es) recorded on that PQR up to 2t (for short-
circuiting type of GMAW, see QW-404.32) in thickness
on base metal of the maximum thickness qualified by the
other PQR(s) used to support the WPS. The requirements
of Note (1) of tables QW-451.1 and QW-451.2 shall apply.





RE: QW 204.b ASME IX
PQR # 2 Base metal thickness= 32 mm , Process: SMAW
Now explain above statement or quote other examples
RE: QW 204.b ASME IX
RE: QW 204.b ASME IX
If you had qualified the GTAW process on 1/2 inch plate making the root and hot pass with the GTAW process and fill passes with the SMAW process or the complete 1/2" thickness welded out with the GTAW process, you could make the root layers for T up to 64 mm using the SMAW process for the fill as presently qualified.
While I was around when this requirement was included in IX, I was not a Committee member and over the years have forgotten their exact reasoning.
RE: QW 204.b ASME IX
Case 1
WPS # 1 Base metal thickness = 16 mm, GTAW 6 mm , SMAW 10 mm
WPS # 2 Base metal thickness = 36 mm, GTAW 10 mm , SMAW 26 mm
How can i combine it according to QW-200.4(b)
Case 2
WPS # 1 Base metal thickness = 14 mm, SMAW 14 mm
WPS # 2 Base metal thickness = 24 mm, GTAW 8 mm , SMAW 16 mm
How can i combine it according to QW-200.4(b), which will be Process for Root
Case 3
WPS # 1 Base metal thickness = 14 mm, GTAW 14 mm
WPS # 2 Base metal thickness = 24 mm, GTAW 8 mm , SMAW 16 mm
How can i combine it according to QW-200.4(b) & which will be process for root deposit
Case 4
WPS # 1 Base metal thickness = 14 mm, SMAW 14 mm
WPS # 2 Base metal thickness = 24 mm, GTAW 24 nn
How can i combine it according to QW-200.4(b) & which will be process for root deposit
RE: QW 204.b ASME IX
The smart thing to do is to look at your PQR's. See if any combination of them will let you write the WPS you are *really* wanting. It is fully acceptable to use more than one PQR to support 1 WPS.
RE: QW 204.b ASME IX
RE: QW 204.b ASME IX
RE: QW 204.b ASME IX
And remember it is PQR thickness not process thickness. You can have a PQR that has a GTAW root with SMAW fill on 1/2" plate and this will satisfy the 1/2" thickness.