ASME IX WPS Joint Design Clarification
ASME IX WPS Joint Design Clarification
(OP)
Hello,
I am hoping I can get some help understanding the joint design details required on a WPS using SMAW with a groove weld.
What details are required in terms of the root spacing, land, bevel, backing, etc?
QW-253 shows all nonessential, so does that mean that a WPS with an illistration of a groove joint is sufficient? If not, where can I find the governing factors with the specific information?
Thanks.
I am hoping I can get some help understanding the joint design details required on a WPS using SMAW with a groove weld.
What details are required in terms of the root spacing, land, bevel, backing, etc?
QW-253 shows all nonessential, so does that mean that a WPS with an illistration of a groove joint is sufficient? If not, where can I find the governing factors with the specific information?
Thanks.





RE: ASME IX WPS Joint Design Clarification
You can also refer to a number of AWS D10.X recommended practices for pipe joints. An example of one of the D10.X RP is AWS D10.12 Recommended Practice and Procedures for Welding Plain Carbon Steel Pipe.
Best regards - Al
RE: ASME IX WPS Joint Design Clarification
RE: ASME IX WPS Joint Design Clarification
RE: ASME IX WPS Joint Design Clarification
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN
RE: ASME IX WPS Joint Design Clarification
The information needed by the welder to properly fit-up the weld joint are typically considered to be nonessential variables. That means the engineer can change them without having to requalify the welding procedure, but that doesn't mean the information doesn't need to be provided to the welder. While ASME codes provide the engineer with considerable latitude, it doesn't mean the engineer doesn't have to address the problem and lay it all at the welder's feet with a comment like, "You're a welder, you should know this stuff." That's a cop-out by an engineer that doesn't know what he/she is doing.
Best regards - Al