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Steel pipe polyethylene 3PE, 2PE anti-corrosion

Steel pipe polyethylene 3PE, 2PE anti-corrosion

Epoxy powder is electrostatically sprayed onto the surface of steel pipes, followed by lateral wrapping with an adhesive and lateral wrapping with a polyethylene anti-corrosion layer. By combining the excellent properties of these three components, the overall quality of the anti-corrosion pipeline is significantly enhanced. The pipeline exhibits outstanding resistance to chemical corrosion, resistance to cathodic disbonding, and resistance to mechanical damage.

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Anti-corrosion Steel Pipe

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Product Description

2PE/3PE Anti-corrosion Steel Pipe

Specifications: Φ89mm–Φ3200mm
Material: Q235B, Q345B, No. 10 Steel, No. 20 Steel, Grades X42–X80
Standard: GB/T23257-2017

2PE/3PE anti-corrosion structure:

Epoxy powder is electrostatically sprayed onto the surface of steel pipes, followed by lateral wrapping with an adhesive and lateral wrapping with a polyethylene anti-corrosion layer. By combining the excellent properties of these three components, the overall quality of the anti-corrosion pipeline is significantly enhanced. The pipeline exhibits outstanding resistance to chemical corrosion, resistance to cathodic disbonding, and resistance to mechanical damage.

Before applying the anti-corrosion treatment, the base material of 2PE/3PE coated steel pipes must undergo inspection and recording upon entering the pipe-handling platform. The outer surface of the steel pipe is then blast-cleaned to remove rust. Next, the cleanliness and anchor profile depth of the pipe’s outer surface are checked to ensure they meet the specified requirements. If they do not meet the requirements, the surface is manually ground with a handheld grinding wheel until it passes inspection. Tape is wrapped around the pipe ends, followed by dust removal. The pipe is then heated using medium-frequency induction to reach the required temperature, after which an epoxy powder coating is applied. A glue extruder is used to apply adhesive along the side of the pipe, while a PE extruder is employed to perform the fusion bonding on the opposite side. The coated pipe is subsequently cooled with water. Finally, qualified products are marked with identification labels, transferred to the pipe-handling platform, stacked, and prepared for shipment.

The applications of 3PE-coated steel pipes are extremely broad, making them suitable for various pipeline systems including underground water supply and drainage in coal mines, underground grouting, positive and negative pressure ventilation, gas extraction and drainage, fire-fighting water sprinkling, and more. They are also ideal for conveying waste residues and return water in thermal power plants. These pipes exhibit outstanding performance when used as water supply lines in spray and sprinkler systems. Additionally, they serve as protective conduits for cables in power, telecommunications, and highway projects. They are well-suited for high-rise building water supply systems, district heating networks, municipal water supply projects, gas transmission pipelines, and underground water pipelines. Furthermore, they are employed in process pipelines that convey corrosive media in industries such as oil transportation, chemical and pharmaceutical manufacturing, and textile dyeing. They are also utilized in wastewater treatment and discharge systems, sewage pipelines, and anti-corrosion projects for biological treatment ponds. Other applications include agricultural irrigation networks, deep-well pipes, drainage systems, and numerous other pipeline networks. It can be said that 3PE-coated steel pipes have become indispensable in today’s construction projects, and we believe that with further advancements in technology, they will achieve even greater success in the future.

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