本文件规定了ISO？3834系列的概述，以及在ISO？3834-2、ISO？3834-3和ISO？3834-4规定的三个级别中选择金属材料熔焊质量要求的适当级别时应考虑的标准。 它适用于车间和现场安装现场的制造。 本文件未规定全面质量管理体系（QMS）的要求。然而，第6条确定了QMS元素，其中包含了对ISO 3834系列的补充。

This document specifies a general outline of the ISO 3834 series and criteria to be taken into account for the selection of the appropriate level of quality requirements for fusion welding of metallic materials, among the three levels specified in ISO 3834-2, ISO 3834-3 and ISO 3834-4. It is applicable to manufacturing, both in workshops and at field installation sites. This document does not specify requirements for a total quality management system (QMS). However, Clause 6 identifies QMS elements where their inclusion complements the ISO 3834 series.