... -Φ1220.3PE Anti-corrosionAnti-corrosion structure of 3PE layer for the pipeline, the first layer is epoxy powder (FBE>100μm), the ... corrosionAnti-corrosion structure of 2PE layer for the pipeline, the first layer is viscose adhesive (AD), the second layer is polyethylene(PE), two kinds ... of materials melt together, the thick of every layer is the same as the 3PE Anti-corrosion.The steel ...