Welder Qualification Expiry and Production Pressure
A welder's qualification for manual metal arc welding (MMAW) on carbon steel expired three months ago. The welder has been continuously working on non-code repairs and maintenance, but no formal revalidation has occurred. The shop has a critical production run of 50 pressure vessels that must be completed in two weeks. The welding coordinator is under pressure to use the welder to meet the deadline. The client requires compliance with ISO 3834-2, which mandates that welders be qualified for the work they perform. The welder's original qualification was based on ISO 9606-1, and the expiry was due to a lapse in tracking. The coordinator must decide whether to allow the welder to work on the pressure vessels.
1. What are the ISO 3834-2 requirements regarding welder qualification and its validity?
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ISO 3834-2 requires that welders be qualified by an appropriate test according to ISO 9606-1 or equivalent. The qualification must be valid for the specific welding process, material group, and conditions. Validity is typically for two years, provided the welder has been continuously working in the relevant scope without a break exceeding six months. If the qualification expires or the welder has not been active in the scope for more than six months, revalidation is required. In this case, the welder's qualification expired three months ago, and although the welder has been working on non-code repairs, that work may not be within the same scope (e.g., pressure vessels). Therefore, the welder is not qualified for the pressure vessel work. The coordinator cannot simply rely on the expired certificate. The ISO 3834-2 standard emphasizes that the manufacturer must maintain records of welder qualifications and ensure they are current. Allowing an unqualified welder to work would be a non-conformance.
2. What options does the welding coordinator have to address the situation while meeting the deadline?
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The coordinator must not use the welder without valid qualification. Options: (1) Arrange for immediate revalidation of the welder according to ISO 9606-1. This may involve a practical test and/or theoretical examination. If the welder has been continuously working in a similar scope, some reduction in testing might be possible, but the expiry means a new test is likely required. (2) Assign the pressure vessel welding to other welders who hold valid qualifications for the required scope. (3) If the welder's recent work on non-code repairs is within the same scope (e.g., same process, material, thickness), and the coordinator can demonstrate continuous activity, a revalidation with limited testing might be acceptable, but this must be confirmed with the client or examiner. (4) Request an extension from the client if the deadline cannot be met. (5) Implement a tracking system to prevent future lapses. The coordinator should prioritize compliance over schedule and communicate transparently with the client. Using an unqualified welder would risk rejection of the vessels and damage the company's reputation.