本标准介绍了用开口根部或自耗嵌件焊接金属管对接接头根部焊道的指南。讨论了接头设计、装配、自耗嵌件配置、母材、填充金属和吹扫。介绍了适用的弧焊工艺和技术。

This standard presents guidelines for welding the root pass of metal pipe butt joints with an open root or a consumable insert. Joint designs, assembly, consumable insert configurations, base metals, filler metals, and purging are discussed. Applicable arc welding processes and techniques are described.