WPS/PQR/pre-qualification questions
WPS/PQR/pre-qualification questions
(OP)
I'm looking into these as a lower cost alternative to my development of the WPS/PQR with independent testing lab proofing of my procedures.
When purchasing pre-qualified procedures, is there any further testing required other than the testing of the welding machine or the welder (depending on the process)? i.e., appropriate certifications for testing like charpy?
Does your company purchase pre-qualified welding procedures?
What precipitated the decision to purchase them as opposed to developing your own - was the decision based solely on costs?
Do your customers accept pre-qualified welding procedures without issue or have you had them questioned by the client?
Were there any procedures you wanted to purchase but were not available?
When purchasing pre-qualified procedures, is there any further testing required other than the testing of the welding machine or the welder (depending on the process)? i.e., appropriate certifications for testing like charpy?
Does your company purchase pre-qualified welding procedures?
What precipitated the decision to purchase them as opposed to developing your own - was the decision based solely on costs?
Do your customers accept pre-qualified welding procedures without issue or have you had them questioned by the client?
Were there any procedures you wanted to purchase but were not available?
RE: WPS/PQR/pre-qualification questions
RE: WPS/PQR/pre-qualification questions
RE: WPS/PQR/pre-qualification questions
The guided bends can be prepared and bent in-house, the reduced section tensile specimens can be machined in house or subcontracted. The actual tensile specimens can then be pulled at any location with the equipment.
For ASME Sec IX there is no requirement for 3rd party or independent involvement. IF I have missed it, let me know where it is!
Good Day
G Austin
Iuka, Mississippi
RE: WPS/PQR/pre-qualification questions
RE: WPS/PQR/pre-qualification questions
RE: WPS/PQR/pre-qualification questions
Article V of Section IX allows use of SWPSes as prepared by the Welding Research Council. While it is not a "prequalified" procedure in the same sense as AWS D1.1, which allows you to write your own within allowable ranges, Section IX does let you use a SWPS without verifying mechanical properties. (you do have to do what is in essence a soundness test)