本欧洲标准规定了电影和数字射线照相的基本技术，其目的是使经济上获得4568令人满意和可重复的结果。这些技术是基于普遍公认的实践和基础理论的主题。 本欧洲标准适用于金属材料管道的射线检查，用于腐蚀点蚀，普遍腐4568蚀和侵蚀等工况引起的缺陷。除了常规含义之外，本标准中使用的“管道”应理解为覆盖其他圆柱体，如管，管道，锅炉鼓和压力容器。 典型的焊接过程引起的焊缝缺陷的焊接检查不包括在内，但是焊接检查包括腐蚀/腐蚀类型的缺陷。 这些管道可能是绝缘的，也可以在内部或外部怀疑由于腐蚀或侵蚀造成的材料损失的情况下进行评估。 EN 16407的这一部分涵盖了用于检测墙体损失的双壁检测技术，包括双壁单图像（DWSI）和双壁双图像（DWDI）。 请注意，EN 16407本部分中描述的DWDI技术通常与EN 16407-1中涉及的切向技术相结合。 本欧洲标准适用于在职服务

This document specifies fundamental techniques of film and digital radiography with the object of enabling satisfactory and repeatable results to be obtained economically. The techniques are based on generally recognized practice and fundamental theory of the subject. This document applies to the radiographic examination of pipes in metallic materials for service induced flaws such as corrosion pitting, generalized corrosion and erosion. Besides its conventional meaning, "pipe" as used in this document is understood to cover other cylindrical bodies such as tubes, penstocks, boiler drums and pressure vessels. Weld inspection for typical welding process induced flaws is not covered, but weld inspection is included for corrosion/erosion type flaws. The pipes can be insulated or not, and can be assessed where loss of material due, for example, to corrosion or erosion is suspected either internally or externally. This document covers double wall inspection techniques for detection of wall loss, including double wall single image (DWSI) and double wall double image (DWDI). Note that the DWDI technique described in this document is often combined with the tangential technique covered in ISO 20769-1. This document applies to in-service double wall radiographic inspection using industrial radiographic film techniques, computed digital radiography (CR) and digital detector arrays (DDA).