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804 views
04:41 May-20-2005

Fred Raco, Jr.

Consultant, Partner in NDT Laboratory
RNDT, Inc.,
USA,
Joined Jul 2002
24
Welder Qualification

An interesting question was asked of us recently and we didn't have an answer. We were performing radiography on several WPQs and 2 out of 10 were rejected. The code (AWS D15.1) states that either radiography or two side bends may be performed for this qualification. Our customer asked us if we would perform the two side bends on the WPQs that failed radiography. Is this an acceptable practice to disregard the radiography failure? All comments are welcome. By the way, we did not perform the bend tests and the client took his business elsewhere.


 
06:22 May-20-2005
Buddy
Re: Welder Qualification It's my experience that if a component is known to fail one qualification method, another, possibly less severe examination method cannot be used to then qualify that component. In other words, once you know it fails, it fails. However, you might want to run this one by the experts at Inspection Trends magazine ( a publication from AWS), as I have limited knowledge of the AWS code.

----------- Start Original Message -----------
: An interesting question was asked of us recently and we didn't have an answer. We were performing radiography on several WPQs and 2 out of 10 were rejected. The code (AWS D15.1) states that either radiography or two side bends may be performed for this qualification. Our customer asked us if we would perform the two side bends on the WPQs that failed radiography. Is this an acceptable practice to disregard the radiography failure? All comments are welcome. By the way, we did not perform the bend tests and the client took his business elsewhere.
------------ End Original Message ------------




 
02:42 May-22-2005
Ed T.
Re: Welder Qualification ----------- Start Original Message -----------
: An interesting question was asked of us recently and we didn't have an answer. We were performing radiography on several WPQs and 2 out of 10 were rejected. The code (AWS D15.1) states that either radiography or two side bends may be performed for this qualification. Our customer asked us if we would perform the two side bends on the WPQs that failed radiography. Is this an acceptable practice to disregard the radiography failure? All comments are welcome. By the way, we did not perform the bend tests and the client took his business elsewhere.
------------ End Original Message ------------

Absolutely Not!!! That is not in line with the intent of giving you the option of the 2.


 
02:58 Jun-17-2005

mankenberg

Consultant
USA,
Joined Nov 2003
9
Re: Welder Qualification ----------- Start Original Message -----------
: An interesting question was asked of us recently and we didn't have an answer. We were performing radiography on several WPQs and 2 out of 10 were rejected. The code (AWS D15.1) states that either radiography or two side bends may be performed for this qualification. Our customer asked us if we would perform the two side bends on the WPQs that failed radiography. Is this an acceptable practice to disregard the radiography failure? All comments are welcome. By the way, we did not perform the bend tests and the client took his business elsewhere.
------------ End Original Message ------------

Sorry for the late reply to this question - I've been offline for a while.
Ed is right on the money on this. What your client is suggesting is clearly an unethical practice. The intent of the AWS codes in allowing different methods of evaluation of welder performance qualification test welds is to make life easier for the many different fabricators that use those codes.
For instance, a large fabricator with in-house radiography capabilities may choose to RT all of their welder tests. A smaller company may choose to use bend testing. A fabricator may consciously choose to use bend testing as a way to further evaluate the welder's skills (i.e. can the welder cut and gring the bend specimens to the proper dimensions?).
It would be an extremely unethical practice to RT a welder's test, find the "clean" areas, and then take bend specimens from these areas. Shame on them. I also have to wonder then about the work practices of this fabricator. Are these the type of welders that they want to do their work? A welder's test is performed in conditions that are far better than the welder can many times expect to find in production work. If the welder cannot even make a good test weld, how can they expect that that same welder will produce welds of acceptable quality in production?
Mankenberg


 


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