ASME IX QW-423.1 QUESTION

[inspectorGR]

Hello,

what is the range of approval for a welder he tested in pipe with P-No. 1 to 1??

I think interpreting ASME IX, QW-423.1 following:
1 through 11, 34, 41 through 49.

Is that correct???
Can he welds, for example, P47?

Thank you

 

[Gapinspect]

"Is that correct???Can he welds, for example, P47?"

Yes, and Yes.

 

[inspectorGR]

Thank you very much.

But, is that reason? I mean, is it the same difficulty, if a welder weld carbon steel and stainless steel?

distinction elsewhere in the asme code?

Thank you again

 

[weldtek]

inspectorGR,
Keep in mind this is only one variable - base metals. Filler metals is another separate variable that must be considered.
A welder who qualified on carbon steel ( P1) using F6 would be qualified to weld stainless ( P8 with F6), but, also bear in mind that these are minimum Code requirements.
P4x would require separate qualification using F4x filler.

 

[MathGuy]

Though your answer is yes and yes,

Note that your welder is qualified for P-No. 1 through 15F, 34, and 41 through 49.

 

[Duwe6]

Mathguy is correct, meets ASME IX. However, in the 'Real World', P8 [stainless] to P8 is actually harder than P1 to P1. And P4x [inconels, etc.] to P4x is enormously harder. If your welders are using a P1-P1 qual on these other materials, X-ray the first few welds of each guy. Try to get UT ultrasound brought in for any P4x welds. Inconels are very likly to have side-wall Lack-of-Fusion so 'tight' that X-ray will not image it.