What are the unique properties of 3PE-coated steel pipes?
Release time:
2021-02-25
As everyone knows, the base materials for 3PE anti-corrosion steel pipes include seamless steel pipes, spiral welded steel pipes, and straight-seam steel pipes. The three-layer polyethylene (3PE) anti-corrosion coating—characterized by its excellent corrosion resistance, impermeability to water vapor, and superior mechanical properties—has been widely adopted in the petroleum pipeline industry. For buried pipelines, the anti-corrosion layer is critically important to the pipeline's service life. Even with pipes made of the same material, some remain corrosion-free underground for decades, while others leak within just a few years—this difference stems precisely from the varying external anti-corrosion coatings they employ. The 3PE anti-corrosion coating is an ideal external protective layer for buried pipelines. According to tests conducted by authoritative agencies, pipelines coated with 3PE anti-corrosion technology...
Everyone knows. 3PE anti-corrosion steel pipe The base materials include seamless steel pipes, spiral-welded steel pipes, and straight-seam steel pipes. The three-layer polyethylene (3PE) anti-corrosion coating—with its excellent corrosion resistance, impermeability to water vapor, and superior mechanical properties—has been widely adopted in the oil pipeline industry. For buried pipelines, the anti-corrosion layer is critically important to the pipeline's service life. Even with the same material, some pipelines buried underground remain corrosion-free for decades, while others start leaking within just a few years—this difference stems from the varying external anti-corrosion coatings used. The 3PE anti-corrosion coating is an ideal external protective layer for buried pipelines. According to tests conducted by authoritative agencies, pipelines buried using 3PE anti-corrosion technology can have a service life of up to 50 years. The two-layer PE anti-corrosion structure consists of: a first layer of adhesive (AD) and a second layer of polyethylene (PE). These two materials are fully integrated, and the thickness of each layer is identical to that of the three-layer PE system.
The 3PE anti-corrosion steel pipe industry is currently in a good state of development. As we all know in the anti-corrosion sector, the three-layer polyethylene (3PE) coating—characterized by its excellent corrosion resistance, impermeability to water vapor, and superior mechanical properties—has been widely adopted in the oil pipeline industry. For buried pipelines, the anti-corrosion layer is critically important to the pipeline's service life. Even with pipes made of the same material, some remain corrosion-free for decades when buried underground, while others start leaking within just a few years—this difference stems from the varying external anti-corrosion coatings used. Currently, 3PE anti-corrosion technology represents an advanced and mature approach to external pipe coating, offering outstanding anti-corrosion performance and a long service life. It is extensively employed in projects such as natural gas transmission, oil transportation, heating, and refrigeration systems. 3PE-coated steel pipes boast several advantages: they have high flow capacity, low engineering costs, smooth inner pipe surfaces that tend to accumulate less scale, and an equivalent roughness coefficient on both the inner and outer surfaces that is only one-twentieth that of steel pipes. Under the same pipe diameter, length, and pressure conditions, PE pipes exhibit a flow capacity approximately 30% greater than steel pipes, thus providing significant economic benefits.
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