Table 4.2

By Lawrence (*****)

Date 04-06-2009 14:38

D1.1 Table 4.2

Looking at a PQR for pipe Less than 24" dia.... 1/2 inch thick

This tells me that the Nominal Plate thickness qualified is T/2 to 2T

So if we were to generate a welder performance qualification test from this PQR... Lets say a common 1" V groove which is exactly 2T on the PQR..

Even though Table 4.11 says welder will be qualified from 1/8" to unlimited... All production thicknesses must remain between 1/4" and 1" because of the limitations placed on the PQR.....

Right?

By hogan

Date 04-06-2009 15:44

It is a little early on Monday, so I'm not sure that I follow what your asking. It sounds like the welder will be qualified 1/8" to unlimited, but the pqr will limit the ability to generate a wps beyond 1/4" to 1", sounds correct.

By Lawrence (*****)

Date 04-06-2009 16:43

Thanks Hogan!

It was an early Monday morning question for me!

So I thought a little sounding board action would be a good thing.

By bozaktwo1 (***)

Date 04-06-2009 16:46

Maybe this is just the rookie in me speaking up, but I would think that the WPS developed from the PQR would have to fall in that thickness range; the WPQTR might be a different story. So the welder may be qualified to weld 1/8" to UNL, but if he/she runs that WPS, then 1/4" to 1" is the range to stay in, right? gawd, I think I just chased my tail.