3PE Coating Anticorrosive Steel Pipe

3PE coating, which stands for Three-Layer Polyethylene, is an anticorrosive coating applied to steel pipes to protect them from corrosion and extend their service life. This coating system is widely used in various industries, including oil and gas, water transportation, and underground pipelines. United Steel Industry will briefly introduce 3PE coated anticorrosive steel pipe in this passage.

3PE anti-corrosion steel pipe base materials include seamless steel pipes, spiral steel pipes and straight seam steel pipes. 3PE anti-corrosion generally consists of 3 layers of structure:

The first layer of epoxy powder (FBE>100um)

The second layer of adhesive (AD) 170~250um

The third layer of polyethylene (PE) 2.5~3.7mm

In actual operation, the three materials are mixed into one, and after processing, they are firmly combined with the steel pipe to form an excellent anti-corrosion layer. Its processing methods are generally divided into two types: winding type and round die coating type.

Advantages of 3PE anticorrosive steel pipe anticorrosion layer:

The coating of 3PE anti-corrosion steel pipe includes an epoxy powder anti-corrosion coating in contact with the bottom layer and the steel pipe surface, an intermediate layer of copolymerized adhesive with branched structural functional groups, and a top layer of high-density polyethylene anti-corrosion coating. Here are its main advantages:

- Excellent corrosion protection:

The three-layer structure effectively provides excellent corrosion protection, allowing steel pipes to be used for long periods of time in harsh environments.

- Excellent adhesion:

The epoxy powder anti-corrosion coating ensures strong adhesion to the underlying layer and the surface of the steel pipe, enhancing the stability of the overall coating.

- Enhanced effects of copolymer adhesives:

Copolymerized adhesives with branched structural functional groups play an important role in the middle layer, enhancing the adhesion between different layers and improving the overall corrosion resistance.

- Mechanical protection of HDPE layer:

The top layer of high-density polyethylene coating provides strong mechanical protection for the steel pipe, effectively resisting external wear and impact.

- Chemical resistance:

3PE coating has excellent chemical corrosion resistance and is suitable for use in pipeline systems transporting corrosive substances.

- Advanced production technology:

3PE anti-corrosion coating combines the advantages of European 2PE coating and widely used epoxy powder anti-corrosion coating, and adopts advanced production technology to ensure its reliability and wide application worldwide.

3PE anticorrosive steel pipe inspection process:

- Comprehensive inspection:

Conduct a comprehensive inspection of anti-corrosion steel pipes to ensure that they meet the conditions for making insulated steel pipes.

- Corrosion inspection:

Check the steel pipe for corrosion and remove any embroidery or dirt from the surface.

- Form a pipeline:

Put rust-removed and anti-corrosion steel pipes into polyethylene sleeves to form pipelines.

- Polyurethane foam injection:

After head repairing the pipe, polyurethane foam is injected to ensure the gaps are completely filled to provide full insulation.

- Product testing:

Carry out inspection of anti-corrosion steel pipes and finished products of thermal insulation steel pipes to ensure that products meet standard requirements.

3PE coating provides a robust and effective solution for protecting steel pipes from corrosion and other environmental factors. Its layered structure combines the corrosion resistance of epoxy with the mechanical and chemical resistance of polyethylene, making it a popular choice for diverse applications in the industry.