Industrial 3LPE Coating Pipe Production Line with Intermediate Frequency Heating
Product Overview
The 2PE, 3LPE, and FBE epoxy-coated steel pipes are widely applied in pipeline systems for oil, gas, water, and other fluid transportation. They provide excellent resistance against chemicals, moisture, and harsh environments.
The 3-layer PE coating consists of:
- First layer: FBE (Fusion Bonded Epoxy) coating
- Second layer: Adhesive layer
- Third layer: Polyethylene outer layer
The Steel Elbow 3PE Anti-Corrosion Production Line is designed to process bent steel pipes. It integrates rust removal, epoxy powder coating, 3PE winding, cooling, and spraying into one line, ensuring high-quality and durable anti-corrosion protection.
Technical Specifications
| Item |
Name |
Specification |
| 1 |
Diameter of steel pipe |
426, 630, 720, 820, 1000, 1200 |
| 2 |
Curvature radius |
4-6 times D |
| 3 |
Elbow angle |
15-90 degrees |
| 4 |
Steel tube wall thickness |
8 mm - 12 mm |
| 5 |
Epoxy powder thickness |
more than 170 um |
| 6 |
AD copolymer adhesive thickness |
170-250 um |
| 7 |
PE layer thickness |
2.5 - 3.7 mm |
Basic Work Conditions
Process parameters of winding anticorrosion:
- Production line size: 20 m X 15 m
- Total water consumption: 30 cubic meters
- Total power consumption: 450 kilowatts
- Total gas consumption: 6 cubic meters / min.
- Temperature condition: the temperature inside the workshop is higher than 5 degrees
System Components
Elbow Conveyor Line
- Independent center of rotation drive
- Gear ring gear drive with frequency control
- Main parts adopt protective supporting wheel
- Supporting wheel equipped with slide rail for easy installation
- Fixed angle of self-locking structure of transmission line
- Height lift adjustment capability
Medium Frequency Heating
- Angle handwheel adjustment
- Front and rear electric adjustment
- Height adjustment through conveyor line
- Narrow thickness to avoid uneven heating in bending section
- Power: 350kW
- Voltage and current double close regulation
Powder Spraying System
- Annular dusting chamber
- Front and rear electric adjustment of powder spraying chamber
- Spray gun swings left and right
- CNC adjustment of powder quantity
- 12 powder guns configuration
- U-shaped bottom blowback recovery
- Overall material: 304 stainless steel
- Hard negative pressure of recovery air duct prevents deformation
Powder Injection Recovery
- Drawing air duct suitable for pipe diameter changes
- Cyclone + filter cartridge dust removal standard discharge
- U-shaped bottom structure + pulse back blowing for thorough powder recovery
- 304 stainless steel fluidization tank with vibrating screen powder filter
- Equipped with 12 venturi powder pumps
Winding Machine
- Automatic belt locking
- One side with corrosion protection
- Continuous operation of winding tape
- Tight strip winding
- High degree of automation
- Automatic calculation of strip by computer
- Deviation of straight pipe from center doesn't affect winding work
PLC Control System
- Data collection and editing capabilities
- Memory function
- Automatic calculation of strip consumption
- Automatic acquisition and correction of transmission speed
Key Features
Variable Elbow Pipe Conveyor Line
Innovative design allows different pipe diameters, curvature radii, and angles to be processed on the same production line.
Precise Arc Determination Technology
Alloy expansion heads eliminate internal stress and ensure accurate bending radius, overcoming springback and elongation issues.
Coaxial Winding Device
Uses asynchronous inner and outer shaft technology for precise, continuous winding at equal line speed across varying diameters.
Advanced Spray Coating
High-voltage electrostatic spraying ensures uniform coating thickness, excellent gloss, strong adhesion, and corrosion resistance.
Sulfide Boiling Technology
Fluidized bed heating for stable FBE powder melting, with low energy consumption and reliable performance.
Applications
Oil & Gas pipeline systems
Water supply pipelines
Sewage and wastewater transport
Chemical industry pipeline protection
Company Profile
Qingdao Huashida Machinery Co., Ltd was established in 2003. Since its inception, Huashida has focused on plastic polyurethane insulation pipe production line, 3PE anti-corrosion pipe production line, large diameter underground pipe production line and plastic pipe joints for 20 years.
We always attach great importance to research and development, collaborating closely with Beijing University of chemical technology, Qingdao university of technology and scientific research institutions. By absorbing advanced technology home and abroad, after 20 years of endeavor we now rank one of the top 3 manufacturers in the industry in China.
Huashida machines have been well received in Saudi Arabia, Kazakhstan, Uzbekistan, United Arab Emirates, Turkey, Russia, and other countries.
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