3PE coated steel pipes are made from seamless steel pipes, spiral steel pipes, and straight seam steel pipes. The three-layer polyethylene (3PE) anti-corrosion coating, with its excellent corrosion resistance, moisture vapor permeability, and mechanical properties, is widely used in the oil pipeline industry. The anti-corrosion layer of 3PE coated steel pipes is crucial for the lifespan of buried pipelines. Pipes made 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 use. 3PE Coated Steel Pipe, 3PE Coated Steel Pipe Manufacturer, 3PE Coated Steel Pipe Price
Pipe outer wall anti-corrosion method
3PE corrosion protection is typically composed of a 3-layer structure:
One layer of epoxy powder (FBE > 100 um)
Double-sided adhesive (AD) 170-250μm
Three-layer Polyethylene (PE) 1.8～3.7mm
In actual operation, the three materials are mixed together to form an integrated blend, which is then processed to firmly bond with steel pipes, creating an excellent anticorrosive coating. The processing methods typically include winding and round mold wrapping.
The 3PE anti-corrosion steel pipe coating, also known as triple-layer polyethylene coating, is a new type of anti-corrosion steel pipe coating that ingeniously combines Europe's 2PE anti-corrosion layer with the widely used FBE (fusion-bonded epoxy) coating in North America. It has been recognized and used worldwide for over a decade.
The coating of the 3PE anti-corrosion steel pipe consists of an epoxy powder anti-corrosion coating in contact with the steel pipe surface, a middle layer of a copolymer adhesive with branching structural groups, and a surface layer of high-density polyethylene anti-corrosion coating.
The three-layer anti-corrosion coating integrates the high impermeability and mechanical properties of epoxy resin and polyethylene materials. To date, it is globally recognized for its excellent performance and effectiveness as a pipeline anti-corrosion coating, and is thus widely used in various engineering projects.
