Non-Destructive Weld Testing Standards cover multiple possible methods of testing welds or metallic materials. Non-destructive testing analysis techniques are used for QA, evaluations, research, in cases where the product is expensive or unique, failure analysis, and so on. With a focus on radiographic testing, these standards also cover magnetic, radioscopic, ultrasonic, and other methods. General rules, guides, terminology, are provided, as well as standard test methods, specific techniques, and acceptance levels, together covering both the broad strokes and the nuanced testing procedures.
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. The requirements specified in this document for acceptance levels for NDT conform 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. Annex A gives correlations between quality levels, testing levels and acceptance levels for specific testing techniques. Annex B gives an overview on specific testing techniques of standards linked to quality levels, acceptance levels and testing methods.
ISO 17637:2016 specifies the visual testing of fusion welds in metallic materials. It may also be applied to visual testing of the joint prior to welding.
This part of the European standard defines the common terms for two or more non-destructive testing methods.