焊接非破坏性测试 - 超声波测试 - 使用自动相控阵技术

[中文适用范围]： 本文件规定了相控阵技术在最小厚度 6 mm 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、管道和容器中简单几何形状的全熔透焊接接头，其中焊缝和母材均为低合金和/或细晶粒钢。 对于其他钢材的焊缝测试，本文件提供了指导。 对于粗晶钢或奥氏体钢，除本文件外还适用 ISO 22825。 本文件提供了有关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功能和限制的指导。 相控阵技术可以作为独立技术使用，也可以与其他无损检测 (NDT) 方法或技术结合使用，用于制造检查、使用前和使用中检查。 本文件规定了四个测试级别，每个级别对应于不同的缺陷检测概率。 本文件允许基于幅度（等效反射体尺寸）和长度或高度和长度来评估不连续性以用于验收目的。 本文件不包括不连续性的可接受水平。 本文件不适用于 ISO 10893-8、ISO 10893-11 和 ISO 3183 所涵盖的钢铁产品生产过程中焊缝的自动化测试。 [外文原描述]： 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.