本文件规定了相控阵技术在最小厚度为6mm的金属材料熔焊接头半自动或全自动超声波检测中的应用。它适用于板材、管道和容器中几何形状简单的全熔透焊接接头，其中焊缝和母材均为低合金钢和/或细晶粒钢。对于其他钢材料的焊缝测试，本文件给出了指导。除本文件外，ISO 22825还适用于粗晶粒钢或奥氏体钢。 本文件就相控阵技术在熔焊接头不连续性检测、定位、尺寸确定和表征方面的具体能力和局限性提供了指导。相控阵技术可以作为一个支架使用- 单独使用或与其他无损检测（NDT）方法或技术结合使用，用于制造检验、使用前和使用中的检验。 本文件规定了四个测试级别，每个级别对应不同的缺陷检测概率。 本文件允许基于振幅（等效反射器尺寸）和长度，或基于高度和长度，为验收目的评估不连续性。 本文件不包括不连续性的验收等级。 本文件不适用于ISO 10893-8、ISO 10893-11和ISO 3183涵盖的钢产品生产过程中的焊缝自动测试。

This document specifies the application of the phased array technology for the semi- or fully automated ultrasonic testing of fusion-welded joints in metallic materials of minimum thickness 6 mm. It applies to full penetration welded joints of simple geometry in plates, pipes, and vessels, where both the weld and the parent material are low-alloy and/or fine grained steel. For the testing of welds in other steel materials this document gives guidance. For coarse-grained or austenitic steels, ISO 22825 applies in addition to this document. This document provides guidance on the specific capabilities and limitations of the phased array technology for the detection, location, sizing and characterization of discontinuities in fusion-welded joints. Phased array technology can be used as a stand-alone technology or in combination with other non-destructive testing (NDT) methods or techniques, for manufacturing inspection, pre-service and for in-service inspection. This document specifies four testing levels, each corresponding to a different probability of detection of imperfections. This document permits assessment of discontinuities for acceptance purposes based either on amplitude (equivalent reflector size) and length, or on height and length. This document does not include acceptance levels for discontinuities. This document is not applicable for automated testing of welds during the production of steel products covered by ISO 10893-8, ISO 10893-11 and ISO 3183.