process pipe qualification range
process pipe qualification range
(OP)
help to settle dispute: we have a upcoming project , welding alloy 20 P-45 to carbon steel P1 nozzle , contractor has a WPS for p45 to p45 ,I interpret ASME IX 2015 para 432.1 as the following: if he has welder qualified to his P45 WPS they can perform the above P45-P1 weld by following all parameters in the P45 WPS ( filler metal ,gas etc) with no additional qualification test , some think we need to re-qualify a WPS by welding P45-P1 what say you





RE: process pipe qualification range
you must understand the difference between procedure qualification and welder qualification.
i don't find the paragraph 432.1 in ASME ix except the table 432.1 which indicates the F-No. of electrode.
Maybe you means QW423.1
if a welder qualified use an WSP combined with a base metal designed to P-45No, he is qualified to welding the combination of P-No45 and P-No, with other variations of the WPS constant.
RE: process pipe qualification range
If the welder is properly qualified, then according to table QW-423.1, he is qualified to make the dissimilar weld.
However, if your contractor's WPS was qualified for welding P-No. 45 to P-No. 45, then it cannot be used for the dissimilar joint. A P-No. 45 to P-No. 1 WPS is required in this case. See Table QW-424.1
RE: process pipe qualification range
RE: process pipe qualification range
done. You have to have a WPS and a PQR for the 2 materials welded together. Hope that helps
RE: process pipe qualification range
RE: process pipe qualification range
I think your problem is that you don't know how to ask a question very well or explain what it is that you're seeking an answer for, so let me ask you a few questions.
Tell me exactly what material, weld rod, and welding process the welder qualified with.
Does your contractor have a WPS for welding P-No. 45 to P-No. 1?
RE: process pipe qualification range
Think of it this way. The welder is qualified to a process (GMAW, SMAW etc.) within the constraints of the essential variables. The weld procedure is qualified to the material as grouped by P#'s within the constraints of the essential variables for that process.
RE: process pipe qualification range
RE: process pipe qualification range
RE: process pipe qualification range
RE: process pipe qualification range
RE: process pipe qualification range