津华线埋地管道防腐涂层——三层PE

Preliminary discussion on anti-corrosion coating for buried pipeline of Jin Hua pipeline—three-layer PE

从天津港-华北石化原油管道工程管道防腐涂层的选择出发,介绍了埋地管道三层PE防腐涂层的特点,分析了埋地管道三层PE防腐涂层各部分的化学组成。指出埋地管道三层PE中,环氧粉末起主要防腐作用,聚乙烯层的作用是阻挡外界介质,胶黏剂是"桥梁",可以将熔接环氧粉末和聚乙烯有机连接在一起。最终,项目在特殊地段选择了三层PE防腐层,在一般地段选择了环氧粉末防腐层。

Based on the selection of anticorrosion coating for oil pipeline from Tianjin port to North China Petrochemical Company,the characteristics of three-layer PE anti-corrosion coating for buried pipeline is introduced. The chemical composition of each layer is also analyzed. It is pointed out that fusion-bonded epoxy（ FBE） plays a major role in the anti-corrosion property of 3-layer PE coating,while exterior PE（ polyethylene） acts as a barrier layer to prevent the outside medium. The adhesive acts as a bridge connecting the FBE and PE together. Finally,3-layer PE is chosen as anti-corrosion coating in special areas,and FBE is selected as anti-corrosion coating in general areas.