电流法在站场阴极保护绝缘故障排查中的应用  

Application of Current Method in Checking for Station Field with Cathodic Protection Insulation Faults

作　　者：滕延平[1] 李斌 刘文会[1] 刘猛[1] 隋兆博 刘广兴 裴青 TENG Yan-pin;LI Bin;LIU Wen-hui;LIU Meng;SUI Zhao-bo;LIU Guang-xing;PEI Qing(PetroChina Pipeline Company, Langfang 065000, China;China Petroleum Pipeline Inspection Technologies Co., Ltd., Langfang 065000, China;PetroChina Pipeline Changchun Oil＆Gas Transportation Sub-company, Changchun 130000, China)

机构地区：[1]中国石油管道公司,河北廊坊065000 [2]中油管道检测技术有限责任公司,河北廊坊065000 [3]中国石油管道长春输油气分公司,吉林长春130000

出　　处：《管道技术与设备》2018年第3期37-40,共4页Pipeline Technique and Equipment

摘　　要：输油气站场管道及接地系统较多,采用电流环或者钳型电流表等电流测量设备,可以精确测量管道或者接地扁钢的电流大小及方向,结合开挖验证,从而查找出站场阴极保护的绝缘故障位置。应用实例表明:采用电流环或钳型电流表等电流测量设备可以查找出站场阴极保护绝缘故障的位置;某输气站场的阴极保护绝缘故障的原因是站场内的干线管道1101截断阀底部的吊耳与接地扁钢搭接,导致电流导通。Due to the large number of pipeline and grounding systems of the oil gas pipeline,current measuring devices such as current ring or clamp type ammeter were used,which can accurately measure the pipe or the current size and direction of grounding flat steel,combining with excavation,so as to find out the station insulation fault location of cathodic protection. Application examples show that current measuring devices such as current ring or clamping type ammeter can find the position of the cathode protection insulation faults. The reason for the cathodic protection insulation failure of a gas station is that the hanging ear at the bottom of the main line 1101 truncation valve is connected with the grounding flat steel,leading to the current conduction.

关 键 词：输气管道 阴极保护 电流环 钳型电流表 PCM Shafer执行器 

分 类 号：TE9[石油与天然气工程—石油机械设备]