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Edition and Publication:
< Natural Gas and Oil > Editorial Department
Hosted by:
China Petroleum Engineering & Construction Corporation Southwest Company
Authorized by:
China Petroleum Engineering & Construction Corporation
Co-hosted by:
Overseas Research Center of Research Institute of Petroleum Exploration and Development
Editor in Chief:
Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
Address:
No.6, Shenghua Road, High-tech District, Chengdu, Sichuan, China
Postal Code:
610041
Tel:
028-86014709
028-86014500
Email:
cnpc-ngo@cnpc.com.cn
Issue:ISSN 1006-5539
CN 51-1183/TE

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PCM Inspection on Corrosion Control Coating of Buried Pipeline in Gas Transportation Station

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Key Words： Gas transportation station； Corrosion control inspection； PCM inspection； Corrosion； Buried pipeline

Abstract：PCM inspection is a relatively mature method used for defects inspection of external protective coatings of buried long-distance pipelines. However， it is not used usually due to difficult operation in practical inspection on coating defects in gas transportation facilities. Inspection accuracy has direct effects on repair and maintenance workload， in order to improve the accuracy， it is necessary to analyze the characteristics of in-site inspection. Combined with practical inspection， analyzed are difficulties in PCM inspection on coating defects in gas transportation facilities within gas transmission station， such difficulties lie in dense and complex pipeline distribution， various signal interferences and signal weakening resulted from large-scale equipment earthing. Proposed are several operating points and experience for PCM inspection. Actual operation and application of a certain station show that good inspection methods and rich experience are very important for PCM inspection.