WPS 3G Vertical up
WPS 3G Vertical up
(OP)
Hi can anyone advise on the following to code AWS D1.1. There have been project WPQR run and approved. I have been handed copies of the approved WPS which cover unlimited thickness & have been run in 3G Vertical up position.
Do these cover overhead & down hand positions?
Do these cover overhead & down hand positions?





RE: WPS 3G Vertical up
Basic misconception - the PQR / WPS is to prove that filler metal "A" will successfully weld base metal "B" togather. Period. It has nothing to do with testing a welder's skill. Just that successful welds can be made using the material(s) and essential variables specified.
The welder qual - WPQ - is the skill test. For skill, a 3G [vert] weld will only qualify for 1G, 2G, and 3G. Uphill welding qualifies for uphill only. Downhand for downhand only. Overhead welding requires more, and different, skill. Thus the only way a welder can get certified for 4G [overhead] is to weld a 4G coupon.
VERY common error to confuse WPS requirements with WPQ requirements.
RE: WPS 3G Vertical up
RE: WPS 3G Vertical up
Best regards - Al
RE: WPS 3G Vertical up
Table 4.1 states a 3G WPS is valid for Vertical welding only,
Regards,
Kiwi
RE: WPS 3G Vertical up
That should read " A 3G PQR is only valid for production welding in the vertical position"
Regards,
Kiwi
RE: WPS 3G Vertical up