对埋地金属管道外防腐的几点认识

Some Understandings of the Outer Corrosion Prevention of the Underground Buried Metal Pipeline

简要介绍了大庆油田埋地管道腐蚀和外防腐材料现状。对埋地管道外腐蚀原因并针对外防腐结构和外选材的不合理性 ,更新改造工程的“以换代修”等问题进行了分析。为提高埋地管道外防腐工程质量 ,建议根据管道工程实际条件 ,对外防腐方案进行充分的技术经济论证 ,并应尽快制定旧管道更换和维修标准及界限 ,加强长输管道外防腐的检测和评价等工作。

This Paper introduces the present situation of pipeline corrosion and outer corrosion prevention materials of the underground buried pipelines in Daqing oil field and analyzes the outer corrosion reasons of the buried pielines and unsuitability of the outer corrosion prevention structure and materials as well as the “Replacement of reparation with change”in the renewing and remaking engineering.In order to heighten the quality of outer corrosion prevention engineering of the baried pipelines,it is proposed to carry out fully the technical economy provement of the outer corrosion prevention approach in according to the practical conditions of pipeline engineering,work out as quickly as possible the standards and limitation for changing and repaining the old pipelines and to strengthen the checking and evaluating work of the long distance transmission pipeline.