本文件规定了数字射线照相技术，旨在获得令人满意和可重复的结果。这些技术基于公认的实践和学科基础理论。 本文件适用于金属材料熔焊接头的数字射线检测。适用于板材和管道的接头。除传统意义外，本文件中使用的“管道”还包括其他圆柱体，如管道、压力管道、锅炉汽包和压力容器。 本文件规定了通过计算机射线照相（CR）或使用数字探测器阵列（DDA）对金属板和管道焊接接头进行射线照相检测以检测缺陷的数字射线照相X射线和伽马射线检测的要求。它包括DDA的手动和自动检查。 数字探测器提供数字灰度图像，可使用计算机查看和评估（附录E）。 本文件规定了探测器选择和射线照相实践的推荐程序。选择计算机、软件、显示器、打印机和查看条件很重要，但不是本文的重点。本文件中规定的程序提供了射线照相实践的最低要求，允许曝光和获取具有与胶片射线照相相同灵敏度的数字射线照相，以检测缺陷（ISO？17636-1中规定）。 本文件未规定数字射线照片上任何显示的验收等级。ISO？标准10675提供了焊接检查验收水平的信息。 如果缔约方采用较低的测试标准，所达到的质量可能会大大低于严格应用本文件时的质量。

This document specifies techniques of digital radiography with the object of enabling satisfactory and repeatable results. The techniques are based on generally recognized practice and fundamental theory of the subject. This document applies to the digital radiographic testing of fusion welded joints in metallic materials. It applies to the joints of plates and pipes. Besides its conventional meaning, “pipe”, as used in this document, covers other cylindrical bodies such as tubes, penstocks, boiler drums and pressure vessels. This document specifies the requirements for digital radiographic X- and gamma-ray testing by either computed radiography (CR) or radiography with digital detector arrays (DDAs) of the welded joints of metallic plates and tubes for the detection of imperfections. It includes manual and automated inspection with DDAs. Digital detectors provide a digital grey value image which can be viewed and evaluated using a computer (Annex？E). This document specifies the recommended procedure for detector selection and radiographic practice. Selection of computer, software, monitor, printer and viewing conditions are important, but are not the main focus of this document. The procedure specified in this document provides the minimum requirements for radiographic practice which permits exposure and acquisition of digital radiographs with equivalent sensitivity for the detection of imperfections as film radiography (specified in ISO？17636-1). This document does not specify acceptance levels for any of the indications found on the digital radiographs. ISO？10675 provides information on acceptance levels for weld inspection. If contracting parties apply lower test criteria, it is possible that the quality achieved will be significantly lower than when this document is strictly applied.