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A B C D E F H I K M N O P R S T V W

Weld seam testing

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Definition: Weld seam testing comprises all testing measures for assessing the quality and integrity of welded joints. It serves to verify that the joint meets the specified requirements. The selection of testing methods is governed by DIN EN ISO 17635.

Practical relevance: Non-destructive testing methods (NDT) such as ultrasonic testing (UT), radiography (RT), magnetic particle testing (MT) or penetrant testing (PT) identify internal and external defects. In addition, destructive tests such as tensile, bend or notched-bar impact tests can be carried out. Assessment criteria are derived from DIN EN ISO 5817 (quality levels for imperfections).

Decision-making perspectives:

  • Technical decision-makers: Selection of suitable testing methods according to component requirements and safety class.
  • Purchasing/project management: Definition of test classes, acceptance criteria and scope of documentation.
  • Science: Analysis of weld seam microstructure, residual stresses and defect types.
  • Insurance/law: Verification of standard-compliant testing and quality assurance in the event of damage.

Typical testing or verification methods: UT, RT, MT, PT, visual testing (VT), metallographic sections.

FAQ:

  • Which standard governs the assessment of weld seam defects?
  • DIN EN ISO 5817 defines quality levels and assessment groups for imperfections.
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