Knowledge Related to 3PE Anti-Corrosion Steel Pipes
Release time:
2021-05-13
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 is widely used in the petroleum pipeline industry due to its excellent corrosion resistance, vapor permeability, and mechanical properties. The anti-corrosion layer of 3PE-coated steel pipes plays a crucial role in determining the service life of buried pipelines. Some pipelines made of the same materials remain corrosion-free even after being buried underground for decades, while others start leaking within just a few years. This difference is attributable to the varying external anti-corrosion coatings they employ.
3PE anti-corrosion steel pipe The base materials include seamless steel pipes, spiral-welded steel pipes, and straight-seam steel pipes. Three-layer polyethylene (3PE) anti-corrosion coatings are widely used in the petroleum pipeline industry due to their excellent corrosion resistance, vapor permeability, and mechanical properties. The anti-corrosion coating of 3PE-coated steel pipes plays a crucial role in determining the service life of underground pipelines. Some pipelines made of the same materials do not corrode even after being buried underground for decades, while others begin leaking within just a few years. This difference is attributable to the use of different external anti-corrosion coatings.
In practical application, these three materials are mixed and integrated together. After processing, they bond firmly with the steel pipe, forming an excellent anti-corrosion coating. The processing methods typically fall into two main types: winding-type and circular-mold coating-type.
The 3PE anti-corrosion coating for steel pipes—also known as the three-layer polyethylene anti-corrosion coating—is a novel type of anti-corrosion coating that ingeniously combines Europe’s 2PE anti-corrosion coating with epoxy powder anti-corrosion coatings for steel pipes (FBE). It is widely used in North American steel pipe coatings. It has been recognized and employed worldwide for over a decade.
The coating of 3PE anti-corrosion steel pipes consists of a bottom layer in contact with the steel pipe surface—a epoxy powder anti-corrosion coating—and an intermediate layer made of a copolymer adhesive featuring branched functional groups. The outermost layer is a high-density polyethylene anti-corrosion coating.
The 3PE anti-corrosion coating combines the high impermeability and mechanical properties of epoxy resin and polyethylene materials. To date, it has been widely recognized as a pipeline anti-corrosion coating with excellent performance and high efficiency, and has been applied in numerous projects.
Many people are familiar only with the use of 3PE anti-corrosion steel pipes. Indeed, their functionality covers a wide range of applications, including underground coal mine water supply and drainage, underground spraying systems, positive and negative pressure ventilation, gas extraction, fire sprinkler systems, and pipeline networks for various purposes. They are also used for conveying process wastewater, waste residues, and return water in thermal power plants.
It boasts excellent applicability and is suitable for both anti-splash systems and sprinkler systems. Cable protection sleeves used in power, telecommunications, highways, and other sectors. Suitable for water supply in high-rise buildings, heating networks, tap water projects, natural gas transportation, groundwater conveyance, and other pipeline applications. Process pipelines used for conveying corrosive media in industries such as oil pipelines, chemical pharmaceuticals, and dyeing. Anti-corrosion projects for sewage treatment drainage pipes, sewer lines, and biological ponds. For agricultural irrigation pipelines, deep-well pipes, drainage pipes, and other network systems, it can be said that 3PE anti-corrosion steel pipes are indispensable in current construction projects. We believe that with the expansion of scientific and technological advancements, even greater achievements will be made in the future.
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