Product Description
I. Product Structure
The 3LPE (Three-Layer Polyethylene) anti-corrosion steel pipe is primarily composed of the following three layers:
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First Layer: Epoxy Powder
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Second Layer: Adhesive
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Third Layer: Polyethylene
II. Advantages of 3LPE Pipe Coating Line
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Exceptional Sealing Performance: The 3LPE anti-corrosion steel pipe boasts extremely high sealing performance. Long-term operation can significantly save energy, reduce costs, and protect the environment.
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Strong Corrosion Resistance: The construction process is simple and quick, with a service life of 30 - 50 years.
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Excellent Low-Temperature Performance: It maintains good corrosion resistance and impact resistance even under low-temperature conditions, and the polyethylene has low water absorption.
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Superior Comprehensive Properties: It features high epoxy strength, low water absorption of polyethylene, good softness of hot melt adhesive, and high anti-corrosion reliability. This type of anti-corrosion is characterized by a simple production process, good anti-corrosion effect, and low price.
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Rational Coating Structure: The bottom layer is in contact with the surface of the steel pipe and is an epoxy powder anti-corrosion coating. The middle layer is a copolymerized adhesive with branched functional groups, and the surface layer is a high-density polyethylene anti-corrosion coating. In actual operation, the three materials are mixed and integrated, and after processing, they are firmly combined with the steel pipe to form an excellent anti-corrosion layer. The processing methods are generally divided into two types: winding type and round mold wrapping type.
III. Features of 3LPE Coating Line
The 3LPE pipe coating line integrates the high impermeability and high mechanical properties of epoxy resin and polyethylene materials. It is globally recognized as the pipeline anti-corrosion coating with the best use effect and performance, and has been widely used in many projects.
IV. Product Parameters
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Pipe Diameter: 50 - 4200mm
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Processing Capacity: ≥250m²/h
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Cleaning Level: ≥Sa2.5
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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 |
V. Our Advantages
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Advanced Technology Adoption: Utilizing advanced production technology to ensure the advanced performance of the equipment, meeting modern production requirements.
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High Operational Stability: The equipment operates stably and reliably, effectively reducing downtime due to failures.
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High Degree of Automation: Reducing labor costs and improving production efficiency.
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Reliable Anti-Corrosion Quality: The anti-corrosion quality is good, meeting international standards to ensure product quality.
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One-Stop Solution Provision: Offering a comprehensive package including design, installation, commissioning, and training.
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Rich Production Experience: Sharing the production experience from 389 sets of equipment worldwide.
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Professional Team Support: Equipped with 9 professional senior engineers to provide technical support.
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High-End Equipment Workstation: A high-end plastic machinery equipment expert workstation is established in China to provide strong support for equipment research and development and maintenance.
VI. Application Fields
The three-layer polyethylene anti-corrosion coating serves as an advanced technology for the outer protective layer of buried pipes. It is widely used in the anti-corrosion of gas and oil transmission pipelines, urban gas supply pipelines, water supply pipelines, and other fluid transmission pipelines. The 3-layer PE anti-corrosion coating can enhance the mechanical properties of the pipeline, featuring high electrical resistance, waterproofing, wear resistance, and anti-aging performance.
VII. Technological Processes
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Upload Pipes: Place the steel pipes to be processed at the starting position of the production line.
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Pipes Screw Conveyor: Transport the steel pipes to the next processing stage via a screw conveyor.
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Rust Removal: Perform rust removal on the surface of the steel pipes to ensure cleanliness, providing a good base for subsequent coating adhesion.
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Intermediate Frequency Heating: Utilize intermediate frequency heating technology to preheat the steel pipes, enhancing the adhesion of the coating.
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Epoxy Powder Coating: Spray epoxy powder onto the surface of the steel pipes to form the base anti-corrosion coating.
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Outer Layer Adhesive Polyethylene Coating: Apply adhesive and polyethylene on the outside of the epoxy powder coating to form a complete anti-corrosion layer.
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Cooling Spray: Cool the coated steel pipes to ensure the curing of the coating.
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Pipes Screw Conveyor: Transport the cooled steel pipes to the subsequent processing stage via a screw conveyor.
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Grinding Pipe Ends: Grind the ends of the steel pipes to ensure the integrity of the anti-corrosion layer.
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Download Pipes: Remove the processed steel pipes from the production line, preparing them for packaging and transportation.
Company Profile
Qingdao Huashida Machinery Co., LTD, is a manufacturer of series of plastic pipe machines, municipal pipe machines, pipe insulation&anticorrosion machines, and pipe jointing&anticorrosion materials, with 21 years of production experience.
Our main products are:
1. HDPE jacket pipe for pre-insulated pipe Production Line (110-2000mm)
2. Rigid pre-insulated pipe Production Line
3. Flexible pre-insulated pipe(PERT) production line
4. Steel pipe FBE/2LPE/3LPE anti-corrosion coating line
5. Steel pipe derusting line
6. PE pressure pipe/Water Gas supply pipe production line
6. PP/PE plastic board/sheet/geomembrane production line
7. NBR PVC Thermal insulation tube/plate production line
8.Pipeline anti-corrosion materials and instruments: heat shrink joint coating sleeve, electro-fusion weldable joint sleeve, portable welding gun(extruder), PE PP welding rod.
We have been working with more than 400 overseas customers and exporting our products to Kazakhstan, Uzbekistan, Iran, Turkey, Russia, Nigeria and other countries.
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