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PE polyethylene spray anti-corrosion steel pipes usually adopt multi-layer composite structures, commonly including 3PE anti-corrosion structure and TPEP anti-corrosion structure. The 3PE anti-corrosion steel pipe is composed of a bottom layer of fusion bonded epoxy powder (FBE), an intermediate layer of adhesive, and an outer layer of polyethylene (PE). The three layers of material are combined with the steel pipe through winding or coating processes to form a protective layer that is corrosion-resistant, wear-resistant, and has high mechanical strength. TPEP anti-corrosion steel pipes add an inner wall fusion bonded epoxy powder coating on the basis of 3PE, achieving dual anti-corrosion of the inside and outside, significantly improving the overall corrosion resistance and service life of the pipeline.
keyword PE polyethylene spray anti-corrosion steel pipe Category Anti-coating pipe name Related products Get a quotePE polyethylene spray anti-corrosion steel pipe
Structural characteristics of PE polyethylene spray anti-corrosion steel pipe
PE polyethylene spray anti-corrosion steel pipes usually adopt multi-layer composite structures, commonly including 3PE anti-corrosion structure and TPEP anti-corrosion structure. The 3PE anti-corrosion steel pipe is composed of a bottom layer of fusion bonded epoxy powder (FBE), an intermediate layer of adhesive, and an outer layer of polyethylene (PE). The three layers of material are combined with the steel pipe through winding or coating processes to form a protective layer that is corrosion-resistant, wear-resistant, and has high mechanical strength. TPEP anti-corrosion steel pipes add an inner wall fusion bonded epoxy powder coating on the basis of 3PE, achieving dual anti-corrosion of the inside and outside, significantly improving the overall corrosion resistance and service life of the pipeline.
Production process and technical standards
During the production process, the surface of the steel pipe needs to undergo shot blasting and rust removal treatment to ensure coating adhesion. Using electrostatic spraying technology to evenly apply epoxy powder to the pipe body, and then covering the polyethylene layer through extrusion process. The process standards follow technical specifications such as SY/T0413-2002 and GB/T23257-2009, and some international projects adopt DIN30670 or CAN/CSA-Z245.21-M92 standards. The production line includes key equipment such as preheating, spraying, and cooling, and can process pipe diameters ranging from Φ 104mm to Φ 1600mm to meet different engineering requirements.
Application areas and performance advantages
This type of steel pipe is widely used in fields such as petroleum, natural gas, chemical, urban water supply and drainage, and electricity. Its advantages include acid, alkali, salt corrosion resistance, excellent waterproof performance, resistance to mechanical impact, and adaptability to high temperature environments (-30 ℃ to 80 ℃). In buried pipelines, 3PE anti-corrosion coating can extend the time to 50 years, while TPEP steel pipes have 3-5 times higher corrosion resistance than traditional steel pipes due to their internal and external anti-corrosion design, making them particularly suitable for high standard scenarios such as long-distance pipelines and drinking water transportation.
Comparison with other anti-corrosion technologies
Compared to single epoxy coatings or liquid epoxy anti-corrosion coatings, PE spray anti-corrosion coatings (such as 3PE) combine the chemical stability of epoxy powder with the mechanical protection of polyethylene, solving the problems of easy peeling and uneven thickness of traditional coatings. TPEP steel pipe further fills the gap in synchronous anti-corrosion technology at home and abroad, with a cost close to single-layer polyethylene steel pipe, but with better comprehensive performance, becoming an advanced anti-corrosion solution for buried pipelines at present.
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