Welding procedure specification/qualification and welders qualification for oil/gas pipes/facilities?
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I have a question about welding procedures please, and I deeply appreciate your insightful input/answers.
1. Welding procedure specification (WPS)
2. Procedure qualification record (PQR)
3. Welders performance qualification (WPQ)
I know (by definition) what the above three means, I'm fairly new to welding and/or oil and gas industry (just one year experience).
HERE IS MY QUESTION:
When I worked on piping standard for production pad, we used ASME B31.3, 31.4, 31.8 and we simply specified which applies to on and/or off-pad facilities for liquid hydrocarbon, water, and gas. The main thing that appeared in the code were the 3 different equations for B31.4, 31.3, and 31.8. In addition, we just made some recommendations like what pipe sizes should be threaded and which ones should not.
When it comes to welding standard, we have ASME sectoin IX, and API standard 1104. Those I think are the two most widely applied codes to production facilities and piping welding.
When writing a standard/guideline for WPS, PQR, and WPQ, what exactly does this entail?
1. Is it just saying for WPS, use this code, or..
2. I've seen some sample WPS, etc, but for a standard, what kind of information is contained in a company welding procedure standard that the construction folks make contract and/or company welders follow as a procedure, qualification, etc
3. Or do you (after reading through the two codes) say for such kind of weld, use this filler, pre-heat, etc. I've seen a lot of variables (both essential and non-essentials) in sample WPS, but ..
THE BOTTOM LINE IS
If you were asked to write a company standard/guideline on Welding procedures, what would be the content, so that it can be used to get the WPS, PQR, etc
The code already specifies what kind of fillers should used for what kind of base metals, and treatments, etc. So do you just say, use this code, or if you want to get more specific, what do you include...The codes are 100s of pages, the company standards/guideline based on the codes will of course be 3, 5, or more pages.
THANKS YOU FOR YOUR HELP.