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WPS 3G Vertical up

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?

RE: WPS 3G Vertical up

Yes, if the WPS states that.

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

I believe this is covered in AWS D1.1 Section 4.4 and Table 4.1 "WPS Qualification - Production Welding Positions Qualified by Plate, Pipe and Box Tube Tests".

RE: WPS 3G Vertical up

AWS is more restrictive with regards to the production positions qualified. The short answer is that each position requires a separate supporting PQR. The exception is the flat position.

Best regards - Al

RE: WPS 3G Vertical up

Al is correct.
Table 4.1 states a 3G WPS is valid for Vertical welding only,
Regards,
Kiwi

RE: WPS 3G Vertical up

Sorry,
That should read " A 3G PQR is only valid for production welding in the vertical position"
Regards,
Kiwi

RE: WPS 3G Vertical up

I 'stand' [sit?] corrected. Learning has occurred.

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