埋地钢管外防腐层破损检测中的电位梯度法  

Current Voltage Gradient Survery of Buried Ferrous Pipeline Coating Holiday

作　　者：杨永[1] 

机构地区：[1]中国特种设备检测研究院管道与气瓶事业部,北京100013

出　　处：《管道技术与设备》2008年第3期55-56,共2页Pipeline Technique and Equipment

摘　　要：简述了埋地钢质管道外防腐层破损检测中的电位梯度法(包括直流和交流电位梯度法)原理,着重阐述了几种实际应用仪器及现场可能遇到的相关问题分析,最后对该方法的优缺点作了分析,认为该方法是当前埋地钢管外防腐层破损检测技术中最精确高效的。It describes briefly the principle of current voltage gradient surveys which includes direct and alternating current voltage gradient survey（DCVG/ACVG） and is intended for buried ferrous pipeline Coating holiday survey. It mainly introduces several common instruments based on the principle and gives some opinions about condition encountered during the survey, by judging that DCVG/ACVG is a most precise and efficient way to conduct buried ferrous coating holiday survey at present.

关 键 词：外防腐层 埋地管道 电位梯度法 

分 类 号：TE988[石油与天然气工程—石油机械设备]