3PE anti-corrosion steel pipe (i.e. three-layer polyethylene anti-corrosion steel pipe) is a material commonly used for pipeline anti-corrosion, and is widely used in industries such as petroleum, natural gas, chemical industry, water supply and heating. It adopts a three-layer structure, providing excellent corrosion resistance, mechanical strength and temperature and pressure resistance. The following is a detailed analysis of the material of 3PE anti-corrosion steel pipe:

1. Three-layer structure

The "three layers" of 3PE anti-corrosion steel pipe refer to the three layers of anti-corrosion coating of the pipeline, which are:

First layer: epoxy powder layer (FBE)

Material: epoxy resin (Epoxy Powder)

Function: This layer is the innermost layer, directly coated on the surface of the steel pipe, with strong adhesion and anti-corrosion properties, and can effectively prevent corrosion of the inner wall of the pipeline.

Features: It has excellent corrosion resistance and chemical resistance, and can resist various corrosive media such as water, acid, alkali, etc.

Second layer: bonding layer (AD)

Material: polyethylene (PE)

Function: This layer serves to enhance the bonding force between the epoxy layer and the outer polyethylene layer to ensure that the coating will not fall off.

Features: The adhesive layer is usually made of hot melt adhesive or epoxy resin with other chemical materials, which can ensure the durability and stability of the coating.

Third layer: Polyethylene (PE) protective layer

Material: Polyethylene (Polyethylene)

Function: This layer mainly plays a protective role and can effectively resist external physical impact, chemical corrosion and mechanical damage.

Features: Heat-resistant, pressure-resistant, impact-resistant, able to resist various mechanical wear and tear, and has strong UV resistance.

2. Material analysis

Epoxy resin (FBE): Epoxy resin is a high-performance anti-corrosion material with strong corrosion resistance to acids, alkalis, salts and other chemical media. Its cross-linked structure gives it strong adhesion and durability.

Polyethylene (PE): Polyethylene is a thermoplastic plastic that is often used for outer layer protection. It has good corrosion resistance, temperature resistance and UV resistance, and can effectively prevent moisture and oxygen penetration, thereby protecting the steel pipe.

3. Performance characteristics

Excellent anti-corrosion performance: Due to the three-layer coating structure, 3PE anti-corrosion steel pipe can effectively prevent the erosion of pipelines by external corrosive substances, especially suitable for underground pipelines, submarine pipelines and high-corrosion environments.

Temperature resistance and pressure resistance: The polyethylene layer has strong high and low temperature resistance, and has high compressive strength, and can withstand greater external pressure.

Mechanical strength: The outer layer of polyethylene has high impact resistance and wear resistance, which can effectively avoid mechanical damage.

Anti-ultraviolet ability: The outer layer of polyethylene also has strong anti-ultraviolet ability, can withstand long-term sunlight exposure, and is not easy to age.

Convenient construction: The construction of 3PE anti-corrosion steel pipe is simple, the anti-corrosion layer is not easy to fall off after welding, and the maintenance cost is low.

4. Application field

Oil and gas pipelines: 3PE anti-corrosion steel pipes are widely used in long-distance oil and gas pipelines, which can effectively prevent the corrosion of pipelines during long-term use in buried or underwater.

Water supply pipelines: In the water supply system, 3PE anti-corrosion steel pipes can effectively ensure that the water quality is not polluted.

Chemical medium transportation: 3PE anti-corrosion steel pipes can provide long-term anti-corrosion protection for pipelines used to transport chemicals, especially for highly corrosive media (such as acids and alkalis).

Urban thermal network: Due to its good temperature resistance, 3PE anti-corrosion steel pipes are also widely used in heating pipelines.

5. Summary

3PE anti-corrosion steel pipes have become the preferred material for modern pipeline anti-corrosion due to their excellent corrosion resistance, temperature resistance and mechanical properties. By adopting a three-layer structure of epoxy resin inner layer, bonding layer and polyethylene outer layer, it can provide long-term protection in different corrosive environments, and has strong mechanical impact resistance, which is suitable for pipeline construction in various complex environments.

The wide application of this pipeline material, especially in the oil, natural gas and water conservancy industries, has improved the service life and safety of the pipeline, and is one of the indispensable key materials in modern infrastructure construction.