油气长输管道消磁方法与实践  

Demagnetization Method and Practice of Long-Distance Oil and Gas Pipeline

作　　者：文松青 谷东方 刘延昌 廖臻 时彦杰 WEN Songqing;GU Dongfang;LIU Yanchang;LIAO Zhen;SHI Yanjie(Oil&Gas Storage and Transportation Company,PetroChina Xinjiang Oilfield Corporation,Karamay,Xinjiang 834000,China;Wuhan Management Department,Western-East Gas Branch Company,National Pipe Network Group United Pipeline Co.,Ltd.,Wuhan,Hubei 430000,China)

机构地区：[1]中国石油新疆油田分公司油气储运分公司,新疆克拉玛依834000 [2]国家管网集团联合管道有限责任公司西气东输分公司武汉管理处,湖北武汉430000

出　　处：《石油工业技术监督》2023年第4期68-71,共4页Technology Supervision in Petroleum Industry

摘　　要：针对油气长输管道焊接作业存在的磁偏吹现象,分析了油气长输管道带磁的原因,介绍了油气长输管道常用的3种消磁方法,阐述了几种方法在工程实际中的运用实例。研究认为:受作业环境限制,单一的消磁方法一般难以满足复杂条件下的工程施工,多种消磁方式的灵活组合能够满足大多数情况下的焊接要求。同时,对于开展过漏磁内检测的管道,应将消磁机纳入施工准备范畴,避免因准备不充分影响施工进度。研究结论为工程技术人员的油气长输管道施工提供了有益的借鉴。Aiming at the phenomenon of magnetic bias blowing in the welding of long-distance oil and gas pipelines,the paper analyzes the reason for the magnetism of long-distance oil and gas pipeline,introduces three demagnetization methods commonly used in long-distance oil and gas pipeline,and describes the examples of the application of several methods in the engineering practice.It is believed that:owing to the restrictions of operation environment,a single demagnetization method is generally difficult to meet engineering construction under complex conditions;the flexible combination of multiple demagnetization methods can meet welding requirements in most cases.At the same time,for pipelines that have been detected by magnetic flux leakage(MFL),the demagnetizer should be included in the scope of construction preparation so as to avoid affecting the construction progress due to insufficient preparation.The research conclusions provide a useful reference for engineers and technicians in the construction of long-distance oil and gas pipelines.

关 键 词：长输管道 磁偏吹 消磁方法 

分 类 号：TE973[石油与天然气工程—石油机械设备]