Introduction to the 3PE steel pipe anti-corrosion structure

3PE anti-corrosion steel pipe, also known as 3-layer structure polyolefin coating (MAPEC) anti-corrosion steel pipe, is a prevalent choice for corrosion protection in China, particularly for applications in the oil and gas industry as well as for water supply systems. This type of pipe is appreciated for its robustness and longevity, which can be attributed to its three-tiered protective coating system.

The 3PE coating system consists of:

- Epoxy Powder Layer (FBE >100um): This first layer serves as a chemical barrier, preventing moisture and corrosive substances from coming into contact with the steel surface. The epoxy powder is fusion-bonded to the steel pipe, providing a strong adhesive bond .

- Adhesive Layer (AD) 170~250um: The adhesive layer acts as a transition between the epoxy layer and the polyethylene layer, ensuring a strong bond between them. It also provides additional resistance to moisture and chemicals.

- Polyethylene (PE) Layer 2.5~3.7mm: The outermost layer is a thick polyethylene coating that provides mechanical protection and excellent resistance to environmental factors such as UV radiation, abrasion, and impact .

The combination of these three layers results in a coating system that is highly impermeable and resistant to a variety of corrosive agents. This makes 3PE anti-corrosion steel pipes suitable for use in environments where the pipeline is exposed to soil, water, and bacterial corrosion, as well as in areas with high humidity or significant temperature fluctuations.

Furthermore, 3PE anti-corrosion steel pipes offer additional advantages:

- Long Service Life: With proper installation and minimal maintenance, 3PE-coated pipes can last for several decades, reducing the need for frequent replacements and repairs.

- High Mechanical Strength: The polyethylene layer adds a significant level of impact resistance, safeguarding the pipe from external damages.

- Cost-Effectiveness: Although the initial cost of 3PE pipes may be higher than traditional steel pipes, the extended service life and reduced maintenance requirements make them a cost-effective solution in the long run .

- Environmental Compatibility: 3PE coatings are designed to be environmentally friendly, posing minimal risk to the surrounding environment, which is particularly important for projects related to renewable energy and water supply .

In summary, 3PE anti-corrosion steel pipes are an excellent choice for a variety of applications where corrosion resistance and longevity are paramount. Their multi-layered protective system ensures that the pipes remain in optimal condition for an extended period, providing a reliable solution for fluid transportation across different industries.