ISO 9606-1 is an international standard that provides guidance on the interpretation of radiographic images of welds. It is used by welding inspectors and radiographers to assess the quality of welds and to identify any defects that may be present. This article provides an overview of ISO 9606-1, including its scope, requirements, and interpretation guidelines. It also discusses the importance of accurate interpretation of radiographic images in ensuring the quality of welds.
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1. Introduction ISO 9606-1
ISO 9606-1 is an international standard that specifies the requirements for the qualification of welders and welding operators for manual arc welding, gas welding, and arc welding with consumable inserts. The standard is divided into two parts:
- Part 1: General requirements
- Part 2: Specific requirements for manual arc welding, gas welding, and arc welding with consumable inserts
This article provides an interpretation of ISO 9606-1, with a focus on the 2023 edition of the standard.
2. Welder classification ISO 9606-1
ISO 9606-1 classifies welders and welding operators into four categories:
- Category 1: Welders who are qualified to weld simple joints in simple positions.
- Category 2: Welders who are qualified to weld complex joints in simple positions.
- Category 3: Welders who are qualified to weld simple joints in any position.
- Category 4: Welders who are qualified to weld complex joints in any position.
The classification of a welder is determined by the type of joint, the position of the weld, and the material being welded.
3. Qualification tests ISO 9606-1
ISO 9606-1 requires welders to pass a series of qualification tests to demonstrate their ability to produce sound welds. The tests are divided into two categories:
- Visual inspection tests
- Non-destructive testing (NDT) tests
Visual inspection tests are used to assess the appearance of the weld. NDT tests are used to assess the internal quality of the weld.
4. Qualification procedure ISO 9606-1
The qualification procedure for welders under ISO 9606-1 is as follows:
- The welder must be trained in the principles and practices of welding.
- The welder must pass a series of qualification tests.
- The welder must be issued a qualification certificate.
5. Qualification certificate ISO 9606-1
The qualification certificate issued to a welder under ISO 9606-1 must include the following information:
- The name and contact information of the welder
- The date of the qualification tests
- The results of the qualification tests
- The classification of the welder
6. Revalidation
The qualification of a welder under ISO 9606-1 must be revalidated at regular intervals. The revalidation period is determined by the classification of the welder.
7. Conclusion
ISO 9606-1 is an important standard for the qualification of welders and welding operators. The standard provides a clear and concise set of requirements that can be used to ensure that welders are qualified to produce sound welds.
8. Additional information
In addition to the information provided in this article, ISO 9606-1 also includes the following information:
- Guidelines for the selection of test specimens
- Methods for the preparation of test specimens
- Methods for the performance of visual inspection tests
- Methods for the performance of NDT tests
By following the requirements and interpretation guidelines of ISO 9606-1, welding inspectors and radiographers can help to ensure that welds are of the highest quality and that they will meet the required safety standards.
