... adhesive (AD) 170-250μm, the third layer is polyethylene(PE) 2.5-3.7μm, the fusion of three kinds ... layer is viscose adhesive (AD), the second layer is polyethylene(PE), two kinds of materials melt together, the thick of every ... coating line is also called 3PE steel pipe anti-corrosion coating line,3PE steel pipe anti-corrosion coating machine, etc. 3PE Anti-corrosion Steel Pipe Production Line