WPS - Partial Penetration
WPS - Partial Penetration
(OP)
Hi,
Can anybody guide me that, can i devlop WPS "with a partial penetration weld" as per ASME IX?
If yes, any code refernce or any pertinent information in ASME IX?
Prompt reply will be highly appreciated!
Regards
BPVN
Can anybody guide me that, can i devlop WPS "with a partial penetration weld" as per ASME IX?
If yes, any code refernce or any pertinent information in ASME IX?
Prompt reply will be highly appreciated!
Regards
BPVN





RE: WPS - Partial Penetration
You can start by reviwing the AWS's SWPS listed in APPDX E of Section IX and see if any of those meet your requirements. If you decide that one of them meets your requirements, the procedure for adopting it is in Article V of section IX.
I recommend you consult a welding engineer during this process.
RE: WPS - Partial Penetration
Only one caveat: Pay attention to 'big-T'. On an ASME WPS, basemetal thickness is given as T and weld metal deposited as t. You cannot make partial-penn welds on unlimited thicknesses, you have to stay within the 'big-T' limits of the WPS being used.
If you need to develop a new WPS due to P# or welding process, just write the WPS as for "open-root or backed groove welds". As you found reading Sect IX, for the WPS is is a Non-Essential Variable.
Backed vs. open-root becomes a very essential variable when qualifying *welders*, as that is a test of skill. A WPS is only proof that one piece of metal can be successfully welded to another using the specified process and filler material, using a specified preheat and interpass temperature. A PQR/WPS is a test for soundness of the welding process, and skill has no bearing on a WPS.