AWS D1.1: Qualification by testing VS Procedure Qualifcation Record

[sw007]

In AWS D1.1 welding procedure qulification, what is the difference between the Qualification by tesing and Procedure Qualification Record (PQR). It looks like they are the same.

Please advise, thanks.

 

[Mr168]

Can you elaborate on your question?

Both weldors and procedures must be tested. PQR's are used to qualify a procedure to deem the welding variables acceptable, while personnel qualification is used to test the weldor's ability to perform a sound weld.

 

[hogan666]

sw007,
To qualify by testing you would need to perform a PQR. You are correct

 

[sw007]

I am reviewing a welding procedure which is supported by a document named "Qualification by testing", not "PQR". That's the reason I asked this question.

The variables in the WPS are specified based on Pre-qualification varaibles. I do not know why the vendor provided a tested report but still used the variables for pre-qualified WPS.

 

[hogan666]

sw007,
It sounds like you might be looking at a sample form in AWS D1.1 annex N. It is possible to have a prequalified and qualified by testing WPS with the same variables. It could be a typo that marked the form as qualified by testing accidental. I would ask the vendor for an explanation. Not having the ability to properly document a wps qualification raises a flag and I would want to investigate it further.

 

[sw007]

hogan666, Mr168

THANKS FOR YOUR REPLY.

 

[unclesyd]

You could or can write a PQR and have have a welder use the parameters of same to make a product weld and if this weld passes both the welder and PQR are qualified/certified.

In the same vain you can write a PQR for a say an assembly line weld and weld it on the line and if the weld passes inspection again the welder and PQR are certified/qualified.

In both cases there isn't a separate qualifying weld for the PQR.

 

[pipewelder1999]

The "Qualification By Testing" line is used to indicate that a WPS as indicated on the top was qualified by testing and NOT prequalified.

The PQR check box is used to indicate that the entire document is a PQR.

The form used to document the testing ranges may look exactly like the WPS except for having the test results and indicate that it is a PQR.

As an example the form shown at

http://files.aws.org/technical/forms/N-1.pdf

If the top box is checked for "WPS" then one of the two lines below need to be filled in to indicate whether the procedure is prequalified or qualified.

If the check box for PQR is filled in then the record is a PQR and nothing above it should be selected and the back page will need tio be filled out with the test results.

Also in refernce to qualification on production welds.

If you qualify a procedure the coupon, specimens and tests must conform to the requirements of D1.1.


Gerald Austin
Iuka, Mississippi

http://www.weldingdata.com

 

[sw007]

unclesyd, pipewelder1999

Thanks.

If line "Qualification By Testing" is checked, the welding Procedure qulification shall follow AWS D1.1 Section 4 using the parameters for the test coupon. Right?

 

[hogan666]

That is correct.

 

[HgTX]

"PQR" stands for Procedure Qualification Record. It's the test report for the qualification testing. So a PQR is part of the process of "qualification by testing".

(Yeah, I'm coming in late, but this seems not to have been stated explicitly in this thread so far.)

Hg

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