... standards specified.5) adhesive wound: As the polyethylene layer and Fusion Bonded Epoxy Coating adhesion poor, improve ... strength of two materials with different polarity. Adhesive layer thickness of 170μm ~ 250μm. Adhesive ... According to the interface ID separated polyethylene coating layer, remove the pipe joints. Groove system for the ... , rain, to avoid ultraviolet radiation. 3PE layer coating line