Polyethylene three layer anti-corrosion coating, know as 3PE coating, is the world advanced anti-corrosion technology.
3PE coating includes three layers:
1. Epoxy Primer Coating. Directly coated at the pipe surface. The thickness ranges from 60um to 80um. Ensure the overall coating has good adhesion at higher temperatures.
2. Copolymer adhesive. Mian componenet for this layer is polyolefin. The thickness of the adhesive is ranges from 170um to 250um. To make sure the top anti-corrosion coating is adhesived at the primer coating and also the pipe surface.
3. Anti-corrosion Coating (PE). The top layer is extruded polyethylene, the thickness of this lalyer is about 2mm. The total thickness of the 3PE coating is greater than 2.2~2.9mm.
3PE coating combines the excellent porperties of epoxy coating and extrusion coating of polyethylene in two. The interface properties of epoxy coatings and chemical resistance, the mechanical protection characteristics of extruded polyethylene coating combine to significantly improve the total performance of 3PE. Therefore, as buried pipelines external coating, 3PE have the most competitive advantages than other type of external coatng.
