Pipelines are the preferred method of transporting liquids over long distances due to their proven track record of safety and efficiency. However, pipelines are prone to corrosion and subsequent failure, especially in corrosive environments. Therefore, it is essential to apply a proper coating system to reduce the corrosion rate and prolong the service life of the pipeline. One of the most widely accepted pipe coating systems is the 3PE coating system. In this article, we will discuss in detail the advantages and applications of 3PE coatings. 

What is 3PE coating?

3PE (Triple Layer Polyethylene) coating systems consist of three layers - a Fusion Bonded Epoxy (FBE) layer, an adhesive layer, and a polyethylene layer.  The FBE layer is the outermost layer and has excellent adhesion to the steel pipe surface. The adhesive layer is the middle layer, bonding the FBE layer and the polyethylene layer. The polyethylene layer is the inner layer and protects the steel pipe from external corrosive agents.

Advantages of 3PE coating system:

3PE coating systems have several advantages that make them the coating system of choice for pipelines. These advantages include: 

Excellent corrosion resistance: 3PE coating system provides excellent corrosion resistance.  The FBE outer layer protects against corrosive agents such as water, oxygen, and chloride ions. The adhesive layer enables the FBE layer to bond to the steel surface, while the polyethylene layer provides a further corrosion barrier.

Impact resistance: The polyethylene layer of 3PE coating provides excellent impact resistance. This feature is essential for pipes that are susceptible to mechanical damage during handling, transport, and installation.

High-temperature resistance: The 3PE coating system can withstand high temperatures up to 80°C, which is sufficient for most pipeline applications.

Longevity: The 3PE coating system has a long service life, and the expected service life can reach more than 50 years if used correctly.

High-cost performance: Compared with other coating systems such as concrete weight coating, the 3PE coating system is cost-effective.

Application of 3PE coating system:

3PE coating systems are used in various industries where liquids need to be transported through pipelines. These industries include: 

Oil and gas industry: 3PE coating systems are widely used to protect pipelines transporting crude oil, natural gas, and other petroleum products.

Water supply industry: 3PE coating system is used for pipelines transporting drinking water, wastewater, and industrial water. This coating system reduces the risk of corrosion and ensures the purity of the delivered water.

Mining industry: 3PE coating systems are used to protect pipelines conveying mud, tailings, and other fluids used in mining operations.

Chemical industry: 3PE coating system is used to protect pipelines transporting various corrosive chemicals such as acids, alkalis, and solvents.

The 3PE coating system has become the preferred coating system for pipelines due to its excellent corrosion resistance, impact resistance, and high-temperature resistance. The coating system is used in a wide variety of industries including oil and gas, water supply, mining, and chemical industries. Proper application and maintenance of a 3PE coating system can significantly extend the service life of pipes and reduce the risk of accidents.

Cangzhou Shenlong Pipe has a lot of experience in the design and production of water treatment pipelines, and can produce various specifications of steel pipes and fittings according to the project requirements, and do anti-corrosion treatment.

The difference and advantage of 3PE coating and 3PP coating

Methods for connecting 3PE coated steel pipes

How is 3PE coating produced?

Characteristics and process flow of 3PE coating