PE Extrusion Three Layer Steel Pipe  3LPE Coating Machine

The structure of 3-layer PE coating (3PE)

3-layer PE anticorrosion coating consists of  three layers:
1. FBE (Fusion bonded epoxy) coating, FBE>100um
2. Adhesive layer, 170~250um
3. Polyethylene layer, 1.8~3.7mm
The three layers are integrated and firmly combined with the steel pipe to form an excellent anti-corrosion coating.

Advantages of 3-layer PE coating
The three-layer polyethylene anti corrosion coating combines the excellent properties of epoxy coating and extruded polyethylene layer: the interface characteristics and chemical resistance of epoxy coating and the mechanical protection characteristics of extruded polyethylene layer. Therefore, it is very superior as the outer protective layer of buried pipelines. After rigorous scientific testing, the three-layer PE coating can make the life of the buried pipeline reach 50 years. At present, it is recognized as an efficient external pipeline anti corrosion technology in the world.
Steel pipe with 3-layer PE coating (3PE) is widely used in pipeline systems for the transmission of oil, gas, water and other fluids. They have high resistance to corrosive from chemicals, moisture, harmful environment etc.

 Production Process Flow

Pipe Pre-Treatment – Shot blasting (SA 2.5) & degreasing

Epoxy FBE Coating – Electrostatic powder spraying

Adhesive Layer – Extruded copolymer bonding

PE Extrusion – Side-wrap or cross-head extrusion

QC Inspection – Holiday detection, thickness gauge

Technical Specifications

Advantages of equipment

✔ Complete Turnkey Solution – From surface treatment to final inspection

✔ Multi-Layer Protection – Epoxy + Adhesive + Polyethylene for maximum durability

✔ Wide Pipe Compatibility – Covers Ø50mm–Ø2000mm (customizable)

✔ Energy-Efficient Design – 20-30% lower power consumption vs conventional lines

✔ Smart Control System – PLC/HMI with real-time monitoring and data logging