摘要
在油气长输管道维修更换作业中,为了缩短更换作业周期及减少剩磁对管道焊接质量的影响,需要对管道进行退磁作业。分析了导致油气管道带磁的原因:管道检测;外部存在磁场、电场;管道焊接与摩擦等。探讨了管道带磁对管道焊接、其他检测方法与管道寿命的影响。基于油气管道的退磁原理,提出3种管道退磁方法:直流退磁法、交流退磁法及永磁铁退磁法,以此提高油气管道在线焊接质量。研究结果对于工程实践中油气管道退磁方法的选择有一定的指导作用。
During the maintenance and replacement of long-distance oil and gas pipelines, it is necessary to demagnetize the pipelines in order to shorten the replacement cycle and reduce the effect of residual magnetism on the welding quality of pipelines. In this paper, the reasons for the magnetism of oil and gas pipelines were analyzed, e.g. pipeline inspection, external magnetic field and electric field, pipeline welding and friction. Then, the effect of the magnetism of pipeline on its welding and service life and other pipeline inspection methods were studied. Finally, with the demagnetization principle of oil and gas pipeline as the beginning, three pipeline demagnetization methods were proposed to improve the on-line welding quality of oil and gas pipelines, including DC demagnetization method, AC demagnetization method and permanent magnet demagnetization method. The research results play a certain role in guiding the selection of demagnetization methods for oil and gas pipelines in engineering practice.
作者
王维斌
赵弘
杨晓丽
辛真
WANG Weibin;ZHAO Hong;YANG Xiaoli;XIN Zhen(PetroChina Pipeline R & D Center;College of Mechanical and Transportation Engineering, China University of Petroleum (Beijing);CNOOC Petrochemical Engineering Co. Ltd.)
出处
《油气储运》
CAS
北大核心
2019年第6期623-628,共6页
Oil & Gas Storage and Transportation
基金
国家重点研发计划资助项目“国家石油及天然气储备库安全保障技术与装备研发”,2017YFC0805800
国家自然科学基金资助项目“海底油气管道封堵致振机理及气动减振控制方法研究”,51575528
中国石油管道分公司研发项目“中俄东线管道在线退磁可行性研究”,20180106
关键词
油气管道
退磁
退磁方法
永磁铁
oil and gas pipelines
demagnetization
demagnetization methods
permanent magnet
