Inspection and Repair Technology for External Corrosion in Buried Pipeline
Quan Jia (China Petroleum Engineering Co.,Ltd. Southwest Company,Chengdu,Sichuan,610041,China) Tan Quanling,Yue Liangu(PetroChina Tarim Oilfield Company,Korla,Xinjiang,841000,China) Li Shuyi(SINOPEC Yulin-Ji’nan Gas Pipeline Company,Ji’nan,Shandong,250101,China) Zhang Chi(SINOPEC Beijing Oil Company,Beijing,100022,China)
With development and completion of pipeline integrity management system,more and more attention is paid to the detection and assessment techniques for external coatings on oil and gas pipelines. Described is the basic principle and main content of common detection techniques for external coatings,introduced are repair techniques for points of failure in external coatings and summarized are repair plans and steps. Pipeline operating companies shall conduct oil and gas pipeline external corrosion coating detection regularly in order to make clear pipeline corrosion conditions and prepare reasonable maintenance plan,which can reduce pipeline running risks and realize scientific management.