埋地油气管道磁记忆检测机理及影响因素综述

Theoretical Mechanism and Influencing Factors of Magnetic Memory Testing for Buried Oil and Gas Pipelines

金属磁记忆检测技术作为一种新型的埋地油气管道非开挖无损检测手段,具有无须磁化、可预判缺陷等优势。但目前该技术主要围绕小型构件展开探究,且试验以实验室条件居多,服役环境下埋地管道的研究成果不多。鉴于此,本文纵观近年国内外研究进展及现状,概述了效应原理,梳理了基础理论的学说流派,分析了埋地管道工作环境下磁记忆信号的影响因素及作用效果。在此基础上,归纳出目前有待解决的问题,展望了未来的研究方向。

As a novel non-excavation and non-destructive testing(NDT)method,metal magnetic memory(MMM)testing technique has attracted extensive attention due to its ease of operation,dispensability of magnetization,and predictive ability of early defects.However,most researchers in this field focus on small components currently,and relative experiments are mainly performed in laboratories.There are few research results relevant to magnetic memory detection of buried pipelines in actual work environments.From this,this paper reviewed the recent international research achievements of magnetic memory detection technology,summarized the effect principle of the technology,sorted out the main theories of the basic theoretical mechanism,and then analyzed the influencing factors and effects of the magnetic memory signals of buried oil and gas pipelines in the work settings.On this basis,this paper presented the current problems and future research directions in the magnetic memory detection technology of buried pipelines.