L360M钢管钨极氩弧自动外根焊工艺  

Process of Automatic External Root Welding L360M Steel Pipe with Gas Tungsten Arc

作　　者：张西雷 邵洪波 闫光宁 ZHANG Xilei;SHAO Hongbo;YAN Guangning(The NO.2 Pipeline Construction Limited Company of China National Petroleum Corporation,Xuzhou 221006,Jiangsu,China)

机构地区：[1]中国石油天然气管道第二工程有限公司,江苏徐州221006

出　　处：《焊管》2022年第8期44-48,共5页Welded Pipe and Tube

摘　　要：以L360MΦ559 mm×12.7 mm钢管为例介绍了钨极氩弧自动外根焊工艺,该工艺采用脉冲特性向上焊接,实现单面焊双面成形,确保了根焊焊接质量。经过对焊接接头进行检测分析,其焊缝外观检测、无损检测、力学性能试验结果均能满足相关标准要求。采用钨极氩弧自动外根焊工艺可用于中小直径长输管线的焊接,降低焊工劳动强度,减少焊接过程中的停顿,提高施工效率,具有推广应用价值。Taking L360MΦ559 mm×12.7 mm steel pipe as an example,the automatic external root welding process with tungsten argon arc is introduced.The process adopts pulse characteristic upward welding to realize single-sided welding and double-sided forming and ensure the welding quality of root welding.Through the inspection and analysis of the welded joint,the detecting resuits of weld appearance inspection,nondestructive testing and mechanical property test can meet the requirements of relevant standards.The automatic external root welding process of tungsten argon arc can be used for the welding of middle and small diameter long-distance transmission pipelines,reduce the labor intensity of welders and the pause in the welding process,and improve the construction efficiency,which has the value of popularization and application.

关 键 词：管道对接焊 根焊 钨极氩弧焊 自动焊 

分 类 号：TG444[金属学及工艺—焊接]