The 3PE anti-corrosion coating consists of an epoxy powder layer, an adhesive layer, and a polyethylene layer. The epoxy powder layer provides adhesion and chemical resistance. The thickness of the epoxy powder layer varies depending on the pipe diameter and grade requirements: no less than 120 μm for DN≤500 mm and no less than 150 μm for DN>500 mm; the total thickness can reach 2.7–2.9 mm in reinforced anti-corrosion applications.

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