3PE anti-corrosion spiral steel pipes feature a complete production technology overseas and their service life has garnered attention. The three-layer polyethylene anti-corrosion coating (3PE) combines the properties of fused epoxy powder coating and extruded polyethylene. The interface characteristics and chemical resistance of the fused epoxy powder coating, coupled with the mechanical protection properties of the extruded polyethylene anti-corrosion coating, significantly enhance the performance of each.
3PE coated spiral steel pipes are suitable for conveying corrosive media in industries such as high-rise building water supply, heating networks, potable water projects, natural gas transmission, buried water pipelines, oil transmission pipelines, petrochemicals, dyeing and printing, and more. 3PE coated spiral steel pipes refer to anti-corrosion steel pipes with a three-layer polyolefin coating (MAPEC) outside. The production process involves heating the bare pipe with a medium-frequency furnace, followed by rust removal and inspection before heating. They effectively prevent corrosion of the pipes by acids, bases, and salts in chemical fluid media. In the past, chemical pipelines were not resistant to corrosion and needed to be replaced annually, resulting in high maintenance costs later on.
3PE coated spiral steel pipes are pipes (steel pipes) used in various work sites. One common method of anti-corrosion for steel pipes is to apply a uniform and dense coating on the surface of the rust-removed anti-corrosion pipes, isolating them from various corrosive media. 3PE coated steel pipes are used in various work sites. To slow down or prevent the erosion and damage of the pipes due to chemical, electrochemical, or microbiological metabolic activities in external media, two or three layers of polyethylene (3PE) are coated on the outer wall of the pipes to achieve anti-corrosion.
3PE Corrosion-Resistant Steel Pipe Coating Structure:
Pipe exterior anti-corrosion treatment
3PE corrosion protection typically consists of a 3-layer structure:
One coat of epoxy powder (FBE > 100um)
Two-Component Adhesive (AD) 170-250 um
Three-layer Polyethylene (PE) 1.8-3.7mm
In actual operation, the three materials are blended together to form a cohesive mixture, which is then processed to firmly bond with steel pipes, creating an excellent anti-corrosion coating. The processing methods typically include winding and round mold wrapping.
1. The 3PE anti-corrosion steel pipe coating, also known as the three-layer polyethylene anti-corrosion coating, is a new type of anti-corrosion steel pipe coating that ingeniously combines Europe's 2PE anti-corrosion layer with the widely used North American epoxy powder coating (FBE) for steel pipes. It has been recognized and used worldwide for over a decade.
2. The coating of 3PE anti-corrosion steel pipes consists of an epoxy powder anti-corrosion coating in contact with the pipe surface as the base layer, a middle layer of a copolymer adhesive with branching structural groups, and a surface layer of high-density polyethylene anti-corrosion coating. The 3PE anti-corrosion coating combines the high impermeability and mechanical properties of both epoxy resin and polyethylene materials. To date, it is globally recognized as an effective and high-performance pipeline anti-corrosion coating, and is thus applied in numerous engineering projects.
