Automatic 3LPE Coating Pipe Production Line with PLC Control System for 50-100 Years Service Life
Product Introduction
The three-layer polyethylene (3LPE) coating process consists of:
- First layer: Fusion Bonded Epoxy (FBE)
- Second layer: Adhesive (AD)
- Third layer: Polyethylene (PE)
This three-layer structure provides excellent corrosion protection for steel pipes and can extend pipeline service life from 5–10 years to 50–100 years.
It is widely used in:
- Oil and gas pipelines
- Urban gas transmission pipelines
- Water supply pipelines
- District heating projects
The 3LPE coating features:
- High mechanical strength
- Excellent electrical insulation
- Strong resistance to moisture, chemicals, and environmental aging
- Long-term anti-corrosion performance
Product Parameters
Coating Structure & Thickness
- First layer: Fusion Bonded Epoxy (FBE) ≥ 100 μm
- Second layer: Adhesive (AD) 170–250 μm
- Third layer: Polyethylene (PE) 2.5–3.7 mm
Applications
The production line is widely used for steel pipe external anti-corrosion coating in:
1. Oil pipelines
2. Natural gas pipelines
3. Water supply pipelines
4. District heating pipelines
5. Chemical and industrial pipelines
6. Underground buried pipelines
Main Equipment Configuration
1. Steel Pipe External Shot Blasting & Derusting Line
| No. | Description | Qty. | Remarks |
|---|---|---|---|
| 1 | Transmission line | 1 set | |
| 2 | Shot blasting derusting line | 1 set | |
| 3 | Cyclone dust collector | 1 set | |
| 4 | Pulse filter cartridge dust collector | 1 set | |
| 5 | Centrifugal blower | 1 set | |
| 6 | Derusting equipment electrical control system | 1 set |
2. Steel Pipe External Spiral 3PE Production Line
| No. | Description | Qty. |
|---|---|---|
| 1 | Coating transmission system | 1 set |
| 2 | Intermediate frequency heating system | 1 set |
| 3 | Epoxy spraying system | 1 set |
| 4 | Automatic feeding dryer | 2 sets |
| 5 | SJ-65/30 single screw high-efficiency extruder | 1 set |
| 6 | SJ-120/30 extruder | 1 set |
| 7 | Hot melt adhesive extrusion die head | 1 set |
| 8 | PE sheet extrusion die head | 1 set |
| 9 | Hot melt adhesive / PE sheet pressing device | 1 set |
| 10 | Stainless steel powder spraying chamber | 1 set |
| 11 | Cooling water spray system | 1 set |
3. Platform System
| No. | Description | Qty. |
|---|---|---|
| 1 | Steel pipe loading platform | 1 set |
| 2 | Derusting transition platform | 1 set |
| 3 | Finished pipe storage system | 1 set |
| 4 | Hydraulic system | 3 sets |
4. Grooving System
| No. | Description | Qty. |
|---|---|---|
| 1 | PE grooving device | 2 sets |
| 2 | Hydraulic elevating pipe turner | 2 sets |
| 3 | Operating cabinet | 1 set |
Company Profile
Qingdao Huashida Machinery Co., Ltd. is one of the leading professional manufacturers and exporters of anti-corrosion and insulation equipment in China.
With more than 20 years of industry experience and strong R&D and customization capabilities, we provide both standardized and tailor-made solutions for customers worldwide.
Our Main Products
- HDPE Jacket Pipe Production Line for pre-insulated pipes (110–2000 mm)
- Rigid Pre-insulated Pipe Production Line
- Flexible Pre-insulated Pipe (PERT) Production Line
- Steel Pipe FBE / 2LPE / 3LPE Anti-corrosion Coating Line
- Steel Pipe Derusting Line
- PE Pressure Pipe / Water & Gas Supply Pipe Production Line
- PP / PE Plastic Board / Sheet / Geomembrane Production Line
- NBR/PVC Thermal Insulation Tube / Sheet Production Line
- Pipeline Anti-corrosion Materials and Tools, including:
- Heat shrink sleeves
- Electro-fusion weldable sleeves
- Portable welding guns (extruders)
- PE / PP welding rods
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.