DIN EN ISO 17635:2025

Non-destructive testing of welds - General rules for metallic materials (ISO 17635:2025); German version EN ISO 17635:2025

This document gives guidelines for the choice of non-destructive testing (NDT) methods for welds in metals and for the evaluation of the results for quality control purposes, based on quality requirements, material, weld thickness, welding process and extent of testing. This document also specifies general rules and standards to be applied to the different types of testing, for the selection of the method, the techniques and the acceptance levels. Acceptance levels cannot be a direct interpretation of the quality levels defined in ISO 5817 or ISO 10042. They are linked to the overall quality of the produced batch of welds. Requirements for acceptance levels for NDT comply with quality levels stated in ISO 5817 or ISO 10042 (moderate, intermediate, stringent) only on a general basis and not in detail for each indication.