The base materials for 3PE anti-corrosion steel pipes include seamless steel pipes, spiral steel pipes, and straight seam steel pipes. The three-layer polyethylene (3PE) anti-corrosion coating, with its excellent corrosion resistance, water vapor permeability, and mechanical properties, has been widely used in the petroleum pipeline industry.

Introduction to the Anti-corrosion Coating of 3PE Corrosion-Resistant Steel Pipe

3PE coated steel pipes: The anti-corrosion layer is crucial for the lifespan of buried pipelines. Pipelines of the same material can last for decades underground without corrosion, while others may leak within a few years. This is due to the different external anti-corrosion coatings they employ.

3PE corrosion protection typically consists of a 3-layer structure:

One coat of epoxy powder (FBE > 100um)

Two-part adhesive (AD) 170-250um

Three-layer polyethylene (PE) 2.5～3.7mm

In actual operation, the three materials are mixed and integrated into one, processed to form a firm bond with steel pipes, creating an excellent anti-corrosion coating. The processing methods generally include winding and round mold wrapping.