输气管线阴极保护问题与治理

Enhancement of Cathodic Protection System for Gas Pipeline

实践证明有效的阴极保护是埋地钢质管道防腐蚀控制的一种重要措施,但是随着城镇化的进程加快,处于郊外与农田地区的管道逐渐被工业园区、工厂、学校、医院等圈占,管道改线、穿越铁路、公路以及河流日渐增多,管道也随之出现了众多阴极保护不达标的区段。针对某输气管线电位出现的阴极保护不达标的问题,从管道改线、套管穿越与水泥配重、阴保站附近的防腐蚀层质量等方面进行了详实的分析,利用馈电模拟试验对增设阴极保护站进行了可行性研究,并取得了良好的治理效果。

It is proved that cathodic protection is an effective method for anti-corrosion of buried steel pipelines.With the rapid development of suburban districts,the buried steel pipeline rerouting,rail-crossing,road-crossing and river-crossing are growing,thus many pipelines can not meet the requirements of cathodic protection criteria.Aiming at the problem of cathodic protection potential did not reach the standard in a pipeline,the problems of pipeline rerouting and crossing,balance weight of concrete and anti-corrosion coating quality were analyzed in detail.Feed test was used to study the feasibility of builting one more CP station,and good governance effect was obtained.