Weld Qualification
Weld Qualification
(OP)
As a non-welder, can someone please explain why we need to qualify welders and weld procedures and what is exactly involved in the qualification process.
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RE: Weld Qualification
http://www.aws.org/
http://www.welding.org/certification.html
RE: Weld Qualification
Can you imagine if there was no testing to demonstrate some level of welder competency? The potential for failures of welded components would be enormous resulting in possible loss of life or harm to equipment.
RE: Weld Qualification
I think the terminology was throwing me off, I was wondering how a procedure got a qualification (night school perhaps)
RE: Weld Qualification
A weld procedure defines stuff like joint perparation, weld filler metal to be used, voltage or current settings, shield gas, pre-heat, position, number of passes and speed...
Sample joints are then made and destructively tested to demonstrate that a weld produced to that procedure will produce the required joint strength. This qualifies the procedure.
Then, individual welders must demonstrate that they can produce that weld. Welder qualification.
RE: Weld Qualification
RE: Weld Qualification
I have seen many examples of bad looking welds but the real problems are the good looking welds which are full of porosity. If you ever get a chance X-ray some welds or section welds. You may be surprised at what you will find.