抚顺-鲅鱼圈成品油管道因与营口市城市规划建设冲突,需要迁移部分管道。在新旧管道对接时,出现了磁偏吹现象。其原因是:在管道进行内部漏磁检测时,管道中存在剩磁。介绍了剩磁产生的原因,以及管道磁偏吹的形成原理和危害。通过采用简单、有效的焊机电缆消磁法,成功解决了磁偏吹对新旧管道焊接的影响,可供今后的管道施工借鉴。 Fushun - Bayuquan refined oil pipelines and urban planning and construction of Yingkou conflict, the need to relocate some of the pipeline. In the old and new pipe butt, there has been magnetic partial blowing phenomenon. The reason is: in the pipeline for internal magnetic flux leakage testing, there is residual magnetism in the pipeline. The causes of residual magnetism are introduced, and the formation principle and harm of pipeline magnetic partial blow are introduced. Through the use of simple and effective welding cable demagnetization method, the magnetic bias blow on the new and old pipe welding has been successfully solved, which can be used for future pipeline construction.