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Welder Certification.

06/08/2010 10:45 AM

I am checking the design of a welded stainless steel structure. What official confirmation can I ask for to assure the welder is qualified? A copy of his American Welding Society (AWS) certificate? Or something from his employer? Thx.

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Anonymous Poster
#1

Re: Welder Certification.

06/08/2010 11:36 AM

He should have a welders qualification approved by a notified body and held on record from his company this qualification should state what he is qualified to weld i.e Stainless Steel 316 or Carbon Steel as stated you require him to hold a WPQ in Stainless Steel and you should also check the positions in which he can weld and the thickness range which all should be on the WPQ (Weld Procedure Qualification) This Should be stamped up by a notified body on a regular Basis (6 months)

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#3
In reply to #1

Re: Welder Certification.

06/09/2010 12:36 AM

Welder qualification is his ability to weld in various positions, thickness range as required (check WPS/ PQR) for the job etc. He is said to be certified when he meets the minimum prescribed norms as per the code of use in that fabrication.

Hence you have to check the code of use in the fabrication, say Sec. IX of ASME, or AWS D 1.1 and see the welder concerned has passed his qualification as per that standard. The joints are radiographed or mechanically tested (Face & root bend tests or macro etching for fillet welding) as per the code and approved accordingly.

AWS code also requires qualification of the welder as per the pre qualified WPS/PQR used at the site by the contractor. All these details are incorporated in his certificate and you have to cross verify.

Welder certification also mean that (as per Sec. IX of ASME), he has been qualified by the contractor for his job in a position and not elsewhere. The qualification is valid for 6 months to one year or at times up to 2 years and a re-certification is required if he is not continuously on the welding job. Hence you have to verify all these factors and qualify him again if he is short of above.

If you are from a third party Inspection Agency and very particular, he can be subjected to re qualification under your agency if required.

Sridhar.

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#4
In reply to #3

Re: Welder Certification.

06/09/2010 12:39 AM

Hence you have to check the code of use in the fabrication, say Sec. IX of ASME, or AWS D 1.1 and see the welder concerned has passed his qualification.

A Correction:

It should be AWS D 1.6 and not AWS D1.1 for SS welding.

Thanks.

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Anonymous Poster
#2

Re: Welder Certification.

06/08/2010 11:30 PM

Contact your local Boilermaker Union Hall

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#5

Re: Welder Certification.

06/09/2010 2:37 AM

I think that in addition to the welder's qualification, the welder's employer should have a book of pre-qualified welds and this particular weld should be among them. You could ask to see that certification. I'm not certain, but I think that is correct.

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#6
In reply to #5

Re: Welder Certification.

06/09/2010 3:47 AM

The quality of the weld is the welders qualification—my thought too.

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#7

Re: Welder Certification.

06/11/2010 10:02 PM

No offense, but stpeping back on the scenario you said your only checking the design of a welded stainless steel but how come you are looking for the welders qualification? You need to fry the bigger FISH! go for the employer and your contract dpartment what is specified from your company's QMS to the welder's employer.

Now if you suspect a weld has defects or any nonconformance to WPS then you need to trace back the welder's qualification from his employer. Employer has QMS standards that meets prequalification of welders before they are employed i.e. applicant for structural steel clasification has to pass the qualification test prescribed in Section 4, Part C of the publication Structural Welding Code-Steel, AWS D1.1 (current edition), with the following modifications: a. All welders shall qualify with the shielded metal arc welding (SMAW) process using a group F4 electrode. b. Test plates, shown in AWS D1.1, Figure 4.21 for unlimited thickness, shall be ASTM A-36 steel and welded in the 3G (Vertical) and 4G (Overhead) position. c. Tests specified in AWS D1.1 Table 4.9 are required.

If the employer do not posses any record of WQ, then issue NCR and get back you your management and review your QMS and contract.

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Anonymous Poster
#8

Re: Welder Certification.

08/28/2010 11:58 PM

both

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