DISTRIBUTION OF STRAY CURRENT DURING WELDING OF PIPELINES
管道电焊过程中杂散电流分布规律研究

Stray current during welding of pipelines and around soils in Xinjiang off field was measured and evaluated. The results indicate that the stray current is not steady, its change range is very large. Stray current in pipe gradually decreases along with the increase of distance to the welding point, and at the same time the stray current gradually increases along with increase of electric welders and pipe diameter. However during welding process the potential gradient in soil appropriatly increases and which gradually decrease with the increase of the distance to the pipeline.