ISO 6520-1:2007是焊接缺陷精确分类和描述的基础。 为了避免任何混淆，在必要时对缺陷类型进行了定义，并给出了解释和图示。 冶金缺陷不包括在内。 根据ISO/TS 17845，可采用另一种缺陷命名系统。根据ISO 6520-1:2007，缺陷的现有分类与ISO/TS 17845:2004的命名系统之间存在对应关系。

ISO 6520-1:2007 serves as the basis for a precise classification and description of weld imperfections. In order to avoid any confusion, the types of imperfection are defined with explanations and illustrations where necessary. Metallurgical imperfections are not included. Another system for the designation of imperfections is possible according to ISO/TS 17845. A correspondence is given between the existing classification of imperfections according to ISO 6520-1:2007 and the designation system according to ISO/TS 17845:2004.