摘要
分析某发生泄漏失效的成品油管线样品,发现泄漏失效裂纹位于环焊缝起弧、收弧处。分析认为导致钢管泄漏失效的原因是环焊缝存在焊接热裂纹且环焊缝内表面成型不良,在长期服役过程中受内、外载荷影响,位于焊瘤附近的焊接热裂纹产生应力集中并发生扩展导致环焊缝泄漏失效。
Analyzed in the article is the reasons for the leakage failure of the sample from a certain refined oil pipeline.It is found that the leakage-causing crack is located at the arc-starting and arc-ending points of the girth weld.As a result it is identified that the main reasons for the said leakage failure of the steel pipe are the existence of welding thermal crack in the girth weld,and the poor formation of the inner surface of the girth weld,and thus during a long time service,affected by both internal and external loads,the welding thermal crack near the weld beading gets the stress concentrated,and then expanded,which inevitably leads to the leakage failure of the girth weld.
作者
刘奎荣
任国琪
王高峰
张皓
LIU Kuirong;REN Guoqi;WANG Gaofeng;ZHANG Hao(CNPC Southwest Pipeline Co.,Chengdu 610041,China;CNPC Tubular Goods Research Institute,Xi'an 710077,China)
出处
《钢管》
2021年第4期67-70,共4页
Steel Pipe
