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The 3PP polypropylene anti-corrosion steel pipe adopts a three-layer composite structure design, consisting of epoxy powder (FBE), adhesive (AD), and polypropylene (PP) layers. The first layer of epoxy powder is tightly bonded to the surface of the steel pipe through electrostatic spraying, forming a chemically bonded anti-corrosion layer; The intermediate adhesive layer serves as the connecting medium, and the epoxy layer firmly adheres to the polypropylene layer; The outer layer of polypropylene provides high mechanical strength and resistance to environmental erosion. This structural synergy significantly enhances the anti-corrosion performance, especially suitable for harsh chemical and physical environments.
keyword 3PP polypropylene anti-corrosion steel pipe Category Anti-coating pipe name Related products Get a quote3PP polypropylene anti-corrosion steel pipe
Structure composition and anti-corrosion mechanism of 3PP polypropylene anti-corrosion steel pipe
The 3PP polypropylene anti-corrosion steel pipe adopts a three-layer composite structure design, consisting of epoxy powder (FBE), adhesive (AD), and polypropylene (PP) layers. The first layer of epoxy powder is tightly bonded to the surface of the steel pipe through electrostatic spraying, forming a chemically bonded anti-corrosion layer; The intermediate adhesive layer serves as the connecting medium, and the epoxy layer firmly adheres to the polypropylene layer; The outer layer of polypropylene provides high mechanical strength and resistance to environmental erosion. This structural synergy significantly enhances the anti-corrosion performance, especially suitable for harsh chemical and physical environments.
Performance advantages and core features
3PP anti-corrosion steel pipes have multiple advantages: their polypropylene layer has strong chemical corrosion resistance and can resist corrosion from media such as acid, alkali, and salt; Excellent mechanical performance, outstanding impact resistance and wear resistance, suitable for conveying high flow rates or granular materials; The outer layer of polypropylene has a low water absorption rate, effectively blocking moisture infiltration and extending the pipeline time to 30-50 years. In addition, it has good insulation performance, with heat loss only 25% of traditional pipes, and significant energy-saving effect.
Main application areas
3PP anti-corrosion steel pipes are widely used in fields such as petroleum, natural gas, chemical, municipal water supply and drainage, and underground coal mine pipelines. Specific scenarios include long-distance oil and gas pipelines, chemical equipment pressure vessels, fire sprinkler systems, deep well drainage, and agricultural irrigation pipelines. Its low temperature resistance (adaptable to -60 ℃ environment) allows it to be directly buried in frozen soil, making it suitable for engineering in high-altitude regions.
Production process and quality control
The production process includes key steps such as shot blasting and rust removal on the surface of steel pipes, epoxy powder spraying, adhesive extrusion winding, polypropylene layer coating, and water cooling and shaping. Adopting an automated production line with uniform thickness of each layer (total thickness 1.8-4.0mm), and strengthening the interlayer adhesion through curing treatment. Some enterprises have obtained ISO9001 certification and implemented SY/T standards, conducting strict testing on indicators such as peel strength and impact resistance.
International Standards and Certification System
3PP anti-corrosion steel pipes comply with the German DIN30678 standard, and some exported products have passed EN10204 3.1B certification, ensuring material traceability and quality reliability. Industry standards require adhesive layer thickness of 170-400 μ m, polypropylene layer thickness of 1.4-4.0mm, and long-term stability verification through thermal aging tests. Relevant enterprises are equipped with advanced testing equipment, such as electric spark leak detectors and peel strength testers, to ensure that products comply with engineering specifications.
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