Initiation and prevention of crater cracks in pipeline automatic welding with solid wire

XIAO Jingfang; LI Zengzhen; HUANG Shengjie; GUO Jingwei; WANG Junhong; LI Guangmin; LU Fenghua

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Initiation and prevention of crater cracks in pipeline automatic welding with solid wire
Vol. 48, Issue 8, Pages: 125-127(2018)
DOI：

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XIAO Jingfang, LI Zengzhen, HUANG Shengjie, et al. Initiation and prevention of crater cracks in pipeline automatic welding with solid wire. [J]. 48(8):125-127(2018)
DOI：

XIAO Jingfang, LI Zengzhen, HUANG Shengjie, et al. Initiation and prevention of crater cracks in pipeline automatic welding with solid wire. [J]. 48(8):125-127(2018) DOI：

摘要

随着石油天然气长输管道朝着高钢级、大口径方向的发展,管道自动焊施工成为长输管道施工中主要的焊接作业方式,但对于不同钢级、不同管径、不同焊材厂家和不同自动焊设备厂家来说,自动焊工艺参数的选择、控制和优化至关重要。依托中俄东线天然气管道工程项目,进行大量的管道自动焊工艺焊接试验,分析长输管道实心焊丝自动焊收弧处裂纹产生的原因及危害,并针对管道局研究院CPP900自动焊设备焊接过程中出现的收弧裂纹进行工艺参数优化,通过控制自动焊电源TPS3200的相关参数设定和试验有效解决了弧坑裂纹,为现场焊接施工提供了质量保障。

Abstract

With the development of oil and natural gas long-distance pipeline towards high steel and large diameter,automatic welding has become the main welding operation method in long-distance pipeline construction.However,the selection,control and optimization of automatic welding process parameters are essential,especially for different steel grades,pipe diameters,welding material manufacturers and automatic welding equipment manufacturers. This paper relies on the Sino-Russian East Line Natural Gas Pipeline Project to carry out a large number of automatic welding process welding tests. The causes of the crater cracks in the automatic welding with solid wire of the long distance pipeline are analyzed. The process parameters were optimized for Prevention of crater crack occurred during welding.Through the parameters of the automatic welding power source TPS3200 Setting and testing,the crater crack for the site has been effectively solved,which provides a quality assurance for site welding.