Evaluation of automatic girth weldability of pipeline in special conditions  

作　　者：LIU Shuo 

机构地区：[1]Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China

出　　处：《Baosteel Technical Research》2021年第2期1-10,共10页宝钢技术研究（英文版）

摘　　要：To meet the requirements of pipeline consumers abroad,in this study,an automatic gas metal arc welding type of girth welding was performed with a heat input of no more than 0.25 kJ/mm and high-strength solid-wire matching for an X70M large-diameter UOE pipeline.An integral evaluation of the X70M pipeline girth weldability was performed with respect to the girth-weld cold-cracking sensitivity during the welding process and the strengthening,hardening,and embrittlement of the girth weld joint after girth welding in especially rigorous welding conditions with accelerated failure characteristics.The performance of the above girth weld joint with joints welded using the main construction-field girth welding procedure was compared to ensure the good girth weldability of the X70M pipeline.The results of this study have important supervisory significance for field-construction girth welding.Finally,the girth weldability of the X70M pipeline was found to satisfy the field construction requirements even when the welding conditions are especially rigorous.

关 键 词：PIPELINE X70M special condition automatic welding girth weld joint WELDABILITY 

分 类 号：TE973.3[石油与天然气工程—石油机械设备]