输气管道阴极保护系统存在的问题及解决方法

发布时间：2018-06-07 12:32

本文选题：输气管道 + 阴极保护系统　；参考：《油气储运》2017年05期

【摘要】：目前,我国长输天然气管道外防腐多数采用较成熟的防腐层外加强制电流阴极保护防腐技术。针对四川某输气作业区8条输气管道外加强制电流的阴极保护现状,分析了阴极保护系统存在的问题:供电电源不独立;部分管道不具备断电电位测试条件;断电电位达不到保护准则要求;部分绝缘接头漏电严重;部分管道防腐层存在严重缺陷;阴极保护系统设施不完善等。为了确保输气管道处于良好的阴极保护状态,结合生产实际,提出了以下解决方法:将阴极保护站单电源更换为具有多路输出功能、能够独立调节的阴极保护电源;安装完善的管道阴极保护电位自动采集系统;更换漏电严重的绝缘接头和安装位置;对防腐层进行修复;完善阴极保护设施。
[Abstract]:At present, the anticorrosion technology of external anticorrosion of long distance natural gas pipeline in China is more mature. In view of the current situation of cathodic protection of 8 gas pipelines in a gas transmission operation area in Sichuan Province, the existing problems of cathodic protection system are analyzed: the power supply is not independent, and some pipelines do not have the test conditions for power off potential. The failure potential can not meet the requirements of the protection criterion; the leakage of some insulating joints is serious; the anticorrosion coating of some pipelines has serious defects; the cathodic protection system is not perfect and so on. In order to ensure that the gas pipeline is in a good state of cathodic protection, the following solutions are put forward: changing the single power supply of the cathodic protection station into a cathodic protection power supply with multiple output functions, which can be adjusted independently; The installation of the pipeline cathodic protection potential automatic acquisition system; the replacement of the leakage of serious insulation joints and installation location; the anticorrosion layer repair; improve the cathodic protection facilities.
【作者单位】：中国石油西南油气田公司安全环保与技术监督研究院;
【分类号】：TE988.2

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