成品油管道直流杂散电流干扰及治理分析

Analysis of DC Stray Current Interference and Treatment in a Product Oil Pipeline

针对成品油管道与地铁等存在交叉或并行日益增多的状况,给成品油管道造成较大的直流杂散电流干扰,造成管道运行期间阴极保护失效,存在运行风险。介绍了常见的四种排流方法,分别阐述了每种排流方法的优缺点,重点介绍了强制排流法,并对比了某公司接地排流法和新采用的直流强制排流法的效果。

Aiming at the condition that more and more crossings or parallels taking place between the pipelines of product oil pipelines and subways,causing great DC stray current interference to the product oil pipelines,which may cause cathodic protection fail during pipeline operation and running risks,four common drainage methods are introduced.The advantages and disadvantages of each drainage method are introduced individually.The enforced drainage method is stressed.The drainage effect of one company s ground drainage method and the newly adopted DC enforced drainage method are compared.