管道外防护补口关系到整条管线的的防腐蚀质量,是导致管道失效的薄弱环节.在众多补口材料当中,如何选择能满足防腐蚀性能、施工条件等多种要求的补口材料尤显重要.本文首先分析了埋地管道补口存在的问题,对常见的近十种防护补口材料的性能进行了评价:在此基础上,构建了防护补口材料比选的指标体系,依据材料对指标体系的符合程度进行评价,最后推荐3PE、2层FBE以及聚脲作为当前最佳的补口材料.

The external anticorrosive joint coating of pipeline referred to the preservative quality of the whole pipeline is the weak links resulting in the pipeline failure.Among the numerous anti-corrosion materials,how to choose joint coating material to meet the many requirements such as the anti-corrosion properties and construction conditions is of the utmost importance.Many problems existing in the pipeline anticorrosion joint-coating were analyzed.The properties of about 10 types of anti-corrosion joint-coating materials were evaluated.On this basis,the compared research concept was used to construct comparison and selection index system of anticorrosion joint coating materials,and to evaluate material on the basis of the extent of various materials conforming to the index system.3 layers of PE,2 layers of FBE and polyurea are recommended as the current best anti-corrosion joint-coating materials.