多频管中电流法在长宁输气管线上的应用  

Application of Pipeline Current Mapper to Changning Gas Pipeline

作　　者：刘海峰[1] 罗文华[1] 王勇[1] 李宇[1] 尤生勇 高道全 丁佐暖 

机构地区：[1]中国石油西南油气田分公司长输管道检测评价中心,四川成都610213 [2]宁夏长宁天然气有限责任公司,宁夏银川750001

出　　处：《天然气与石油》2003年第4期18-21,共4页Natural Gas and Oil

摘　　要：简单分析目前埋地管道防腐层地面检测上常用的多频管中电流法 ,结合作者实际工作 ,介绍该技术在宁夏长宁天然气公司长宁输气管线防腐层检测评价中的应用。通过检测 ,共查出管道防腐层破损点 137处 ,在对上述破损点进行开挖修补时 ,发现防腐层均存在不同程度老化及破损 ,证明该技术对于防腐层破损检测准确率达到 10 0 % ,验证了多频管中电流法的准确性及科学性 ,同时 ,对使用中积累的经验进行总结 。Briefly analyzed is the pipeline current mapper system used generally in inspection of buried pipeline corrosion-resistant coating and described is the application of the technology to coating inspection of Changning Gas Pipeline in Ningxia Changning Natural Gas Company.In inspection 137 breakage locations were detected.It is found that the coating has different degree aging and breakage when those locations were excavated for repair.This fact shows that the accuracy of application of the technology to inspection of buried pipeline corrosion-resistant coating can be as high as 100%,thus proven are the accuracy and scientificalness of the pipeline current mapper system.Some experiences and limitations are also summarized.

关 键 词：埋地管道 防腐层 地面检测 多频管中电流法 

分 类 号：TE978[石油与天然气工程—石油机械设备]