本文件规定了相控阵技术在厚度值在3.2 mm和8.0 mm之间的钢件熔焊接头半自动或全自动超声波检测中的应用。这符合锅炉管壁厚度值的典型范围，这是该测试技术的一个重要应用。当采用本文件的测试水平“D”时，可超过壁厚范围的最小值和最大值。本文件适用于板、管、管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和/或细粒钢。 注:“半自动测试”包括一个或多个探针沿着夹具（导向条、直尺等）在部件表面上的受控移动，由此使用位置传感器明确测量探针位置。手动移动探针。“全自动测试”还包括机械化推进。 如果本文件中规定了与材料相关的超声波参数，则这些参数基于纵波声速为（5920±50）m/s，横波声速为（3255±30）m/s的钢材。在以不同速度测试材料时，有必要考虑这一事实。 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。超声波相控阵技术可作为一种独立技术，或与其他无损检测（NDT）方法或技术结合使用，用于制造和检测新焊缝/补焊（使用前检测）。 本文件规定了两个测试级别: -标准情况下为C级； -不同情况/特殊应用的“D”级。 本文件描述了出于验收目的的不连续性评估，基于: -高度和长度； -振幅（等效反射器尺寸）和长度； -通过/不通过的决定。 本文件不包括不连续性的验收等级。

This document specifies the application of phased array technology for the semi- or fully automated ultrasonic testing of fusion-welded joints in steel parts with thickness values between 3,2 mm and 8,0 mm. This meets the typical range of tube wall thickness values in boilers, which is an important application of this testing technology. The minimum and maximum value of the wall thickness range can be exceeded, when testing level "D" of this document is applied. This document applies to full penetration welded joints of simple geometry in plates, tubes, pipes, and vessels, where both the weld and parent material are low-alloy and/or fine grained steel. NOTE "Semi-automated testing" encompasses a controlled movement of one or more probes on the surface of a component along a fixture (guidance strip, ruler, etc.), whereby the probe position is unambiguously measured with a position sensor. The probe is moved manually. "Fully automated testing" includes mechanized propulsion in addition. Where material-dependent ultrasonic parameters are specified in this document, they are based on steels having a sound velocity of (5 920 ± 50) m/s for longitudinal waves, and (3 255 ± 30) m/s for transverse waves. It is necessary to take this fact into account when testing materials with a different velocity. This document provides guidance on the specific capabilities and limitations of phased array technology for the detection, location, sizing and characterization of discontinuities in fusion-welded joints. Ultrasonic phased array technology can be used as a stand-alone technique or in combination with other non-destructive testing (NDT) methods or techniques, during manufacturing and testing of new welds/repair welds (pre-service testing). This document specifies two testing levels: — level "C" for standard situations; — level "D" for different situations/special applications. This document describes assessment of discontinuities for acceptance purposes based on: — height and length; — amplitude (equivalent reflector size) and length; — go/no-go decision. This document does not include acceptance levels for discontinuities.