3PE Coating Equipment For Steel Pipe,Polyethylene Coating System,Low use cost

INTRODUCTION

A 3PE (Three-Layer Polyethylene) anti-corrosion coating production line is a process that involves applying three distinct layers of protective materials onto the surface of steel pipes. This advanced coating system is designed to significantly extend the service life of the pipes, often from a relatively short span of 5-10 years to an impressive 50-100 years or even longer.

Here's a brief overview of the three layers that make up the 3PE coating:

1. Epoxy Resin Layer (Adhesive Layer): The first layer, typically a fusion-bonded epoxy (FBE), acts as an adhesive between the steel pipe and the subsequent layers. It provides excellent adhesion strength and corrosion resistance, ensuring that the coating system adheres firmly to the pipe surface.

2. Adhesive Layer: The second layer is a specialized adhesive that bonds the epoxy resin layer to the outer polyethylene layer. This layer is critical in preventing the delamination of the coating system under various environmental and operational stresses.

3. Polyethylene Layer: The outermost layer is made of high-density polyethylene (HDPE), which provides the primary barrier against corrosion, moisture, and other external factors that can deteriorate the pipe's integrity. HDPE is known for its durability, flexibility, and resistance to chemical attack and mechanical damage.

The 3PE coating system is widely used in the oil and gas, water supply, and other industries where steel pipes are exposed to harsh environments and require long-term corrosion protection. The application of this coating involves sophisticated equipment and processes, such as sandblasting to prepare the pipe surface, heating the epoxy resin to its fusion temperature, and extruding the polyethylene layer around the pipe.

In summary, the 3PE anti-corrosion coating production line represents a highly effective method of prolonging the service life of steel pipes by providing a robust, multi-layered barrier against corrosion and other forms of degradation.

The technological processes employed by Huashida Machinery for the 3LPE coating of steel pipes involve a series of meticulous steps designed to ensure the highest level of quality and durability. Here's a detailed overview of the process:

1. Upload Pipes:
   • The process begins with the loading of the steel pipes onto the production line. This step ensures that the pipes are positioned correctly and ready for processing.
2. Pipes Screw Conveyor:
   • Once loaded, the pipes are transported through the production line using a screw conveyor. This efficient system gently moves the pipes forward, allowing for continuous and uninterrupted processing.
3. Rust Removal via Intermediate Frequency Heating:
   • To ensure a smooth and even coating, it's crucial to remove any rust or impurities from the pipe surface. This is achieved through intermediate frequency heating, which raises the temperature of the pipe surface to effectively burn off rust and contaminants.
4. Epoxy Powder Coating:
   • Following rust removal, the pipes are coated with an epoxy powder primer. This layer acts as a corrosion-resistant barrier, providing a strong foundation for the subsequent coatings.
5. Outer Layer Solidification & Polyethylene Coating:
   • Next, the pipes undergo the application of the outer layer, which consists of a solidified coating and a polyethylene layer. The solidification process ensures that the coating adheres firmly to the pipe surface, while the polyethylene layer provides additional protection against corrosion and wear.