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3-layer polyethylene (3LPE) anti-corrosion steel pipe
3LPE anti-corrosion steel pipe consists of a three-layer structure, combining advanced technology and high-quality materials to provide excellent anti-corrosion protection for pipelines:
Base layer: epoxy powder coating, which is tightly bonded to the surface of the steel pipe and provides excellent anti-corrosion performance.
Middle layer: copolymer adhesive (with branched functional groups) to ensure that the base layer is firmly bonded to the surface layer.
Surface layer: high-density polyethylene (HDPE), providing mechanical protection, low water absorption and environmental adaptability.
Efficient sealing: extremely high sealing performance, long-term operation can significantly save energy, reduce costs and protect the environment.
Excellent anti-corrosion: strong corrosion resistance, simple and fast construction, and a service life of 30-50 years.
Low temperature adaptability: still has good corrosion resistance and impact resistance in low temperature environment.
Material characteristics: combined with the high strength of epoxy powder, the low water absorption of polyethylene and the flexibility of hot melt adhesive, it ensures high reliability.
Economical and efficient: simple production process, excellent anti-corrosion effect, high cost performance, and meets international standards.
Technical parameters
Pipeline diameter: 50-4200 mm
Processing capacity: ≥250 square meters/hour
Surface cleanliness: ≥Sa2.5
Production materials: epoxy powder, adhesive, polyethylene
Main Equipment List
| No. | Name | Set |
| A. Derusting Equipment | ||
| 1 | Pipe wheel conveyor | 1 |
| 2 | Shot Blasting Machine | 1 |
| 3 | Cyclone Dust Collector | 1 |
| 4 | Pulse dust collector | 1 |
| 5 | Centrifugal exhaust fan | 1 |
| 6 | Rust removal equipment PLC | 1 |
| B. Coating equipment | ||
| 1 | Pipe wheel conveyor | 1 |
| 2 | Induction heating device | 1 |
| 3 | Powder spraying device | 1 |
| 4 | Automatic loading dryer | 2 |
| 5 | SJ-65/30 Extruder | 1 |
| 6 | SJ-120/30 Extruder | 1 |
| 7 | Hot melt adhesive extruder die | 1 |
| 8 | PE sheet extruder head mold | 1 |
| 9 | Hot melt adhesive/PE sheet coating device | 1 |
| 10 | Environmental Protection Ventilation equipment | 1 |
| 11 | Cooling Spray equipment | 1 |
| C.Platform Equipment | ||
| 1 | Steel pipe uploading platform | 1 |
| 2 | Downloading platform | 1 |
| 3 | Pipe storage platform | 1 |
| 4 | Turnover machanism | 3 |
| D.Groove Equipment | ||
| 1 | PE Beveling Machine | 2 |
| 2 | Hydraulic Lifting and Turning Machinery | 1 |
| 3 | Hydraulic Equipment | 1 |
| 4 | PLC automatic control system | 1 |
Upload pipes→pipes screw conveyor→rust removal → intermediate frequency heating→Epoxy powder coating→outer layer adhesive polyethylene coating→cooling spray→pipes screw conveyor→grinding pipe ends→dowload pipes
3LPE anti-corrosion coating is an ideal outer protective layer for buried pipelines and is widely used in:
Oil and gas transportation: natural gas and oil long-distance pipelines.
Urban gas supply: urban gas pipeline network.
Water supply pipeline: urban and industrial water supply system.
Other fluid transportation: chemical, sewage treatment and other pipeline systems.
Performance improvement: high electrical insulation, waterproof, wear-resistant, anti-aging, and enhanced pipeline mechanical properties.
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