Automatic 3LPE Coating Pipe Production Line with PLC Control System for Internal FBE and External 3LPE Anti-Corrosion
Product Description
The Internal FBE & External 3LPE Anti-Corrosion Coating Production Line developed by HUASHIDA is specially designed for applying advanced anti-corrosion coatings to steel pipes of various diameters. This integrated system provides reliable internal and external protection, significantly improving the durability and service life of pipeline infrastructure.
This production line is widely used in various pipeline engineering projects, including:
- District heating pipeline systems
- Natural gas transmission pipelines
- Municipal water supply pipelines
- Oil and other fluid transportation pipelines
The internal FBE (Fusion Bonded Epoxy) coating provides excellent adhesion, chemical resistance, and corrosion protection for the inner surface of the steel pipe. At the same time, the external 3LPE (Three-Layer Polyethylene) coating system forms a strong multi-layer barrier that protects the pipe against moisture, soil pressure, mechanical impact, and corrosive environments.
After coating, the steel pipe surface becomes smooth, uniform, and highly resistant to wear and corrosion. This not only improves the efficiency of fluid transportation by reducing friction, but also greatly extends the pipeline’s service life.
Main Components of the Production Line
The coating line mainly consists of the following units:
- Steel pipe conveyor system
- Shot blasting / sand blasting system
- Dust collector system
- Pipe induction heating system
- Epoxy powder spraying system
- PE & adhesive coating system
- Water cooling system
- Pipe end cutting system
- Hydraulic and pneumatic system
- Testing system
- Electronic control system
Production Process
External 3LPE & Internal FBE Coating Line Process
Pipe loading → Spiral conveyor → Internal rust removal → External rust removal → Medium-frequency heating → Internal epoxy powder coating → External epoxy powder coating → Adhesive & polyethylene outer coating → Water cooling → Pipe conveying → Pipe end beveling / grinding → Pipe unloading
This complete process ensures that both the inner and outer surfaces of the steel pipe are treated and coated efficiently, accurately, and consistently.
Product Parameters
A. Surface Cleaning Equipment
| No. | Name | Specification |
|---|---|---|
| 1 | Steel pipe conveyor | Adjustable speed and angle, pipe loading and unloading controlled by PLC |
| 2 | Shot blasting machine | For internal and external surface cleaning |
| 3 | Cyclone dust collector | High-efficiency cyclone dust removal |
| 4 | Impulse cartridge dust collector | Fine dust filtration |
| 5 | Centrifugal fan | Ventilation support |
| 6 | PLC control system | Automatic control of the line |
B. Coating Equipment
| No. | Name | Specification |
|---|---|---|
| 1 | Spiral pipe conveyor | Adjustable speed and angle |
| 2 | Induction heating machine | For pipe preheating before coating |
| 3 | Powder spraying device | Spraying thickness: 80–800 μm |
| 4 | Automatic feeder & dryer | For powder supply and drying |
| 5 | SJ-65/30 Extruder | Adhesive extrusion |
| 6 | SJ-180/30 Extruder | PE extrusion |
| 7 | Adhesive extruder die mold | High-quality die steel |
| 8 | PE sheet extruder die mold | High-quality die steel |
| 9 | Adhesive / PE sheet coating device | Pressing roller with silicone coating and internal cooling |
| 10 | Environmental protection ventilation equipment | Exhaust and environmental protection |
| 11 | Cooling spray equipment | Rapid cooling after coating |
C. Platform Equipment
| No. | Name | Specification |
|---|---|---|
| 1 | Steel pipe platform | High-quality support platform |
D. Groove / Pipe End Equipment
| No. | Name | Specification |
|---|---|---|
| 1 | PE Beveling Machine | Steel brush disk |
| 2 | Hydraulic Lifting and Turning Machinery | For lifting and turning the pipe |
| 3 | Hydraulic Equipment | Supporting hydraulic operation |
Application
The 3-layer polyethylene anti-corrosion coating technology is one of the most advanced protective solutions for buried steel pipelines. It is widely used in:
- Oil and gas transmission pipelines
- Urban gas supply pipelines
- Water supply pipelines
- Other fluid transportation pipelines
The 3LPE anti-corrosion coating significantly improves the pipeline’s:
- Mechanical strength
- Electrical insulation performance
- Waterproof capability
- Wear resistance
- Aging resistance
It provides long-term protection and ensures reliable performance in harsh operating environments.
Features
1. Integrated Automation
The entire production line is controlled by a centralized PLC and microcomputer system, ensuring synchronized operation, stable production, and high efficiency.
2. Superior Surface Preparation
Advanced internal and external shot blasting technology effectively removes rust, oxide scale, and contaminants, ensuring excellent coating adhesion.
3. Durable Coating Application
The electrostatic powder spraying system delivers a uniform, dense, and impact-resistant anti-corrosion layer.
4. Strong External Protection
The 3LPE polyethylene extrusion coating forms a highly durable barrier against soil corrosion, moisture, and mechanical stress.
5. Efficient Internal Coating
The internal FBE powder coating system provides complete and energy-efficient coverage for long-term internal corrosion protection.
6. Long Service Life
The combined internal and external anti-corrosion system effectively extends the pipeline’s operational lifespan and reduces maintenance costs.
Company Profile
Qingdao Huashida Machinery Co., Ltd., founded in 2003, is a professional developer, manufacturer, and solution provider of plastic extrusion equipment and anti-corrosion pipeline machinery.
With years of experience in international markets, 70% of our customers come from overseas, including Europe, America, the Middle East, and Southeast Asia.
We are committed to providing high-quality equipment, customized solutions, and reliable after-sales service to customers worldwide.
Welcome to visit our factory and discuss cooperation with us!
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