High-Quality 3PE Coating Equipment Line for Steel Pipe Bending
Product Overview
The 3PE Coating Equipment Line for Steel Pipe Bending is an advanced industrial solution designed to apply high-performance three-layer polyethylene (3PE) anti-corrosion coating on bent steel pipes. Engineered for precision and durability, this system ensures consistent coating quality even on complex pipe geometries, making it ideal for pipelines used in oil, gas, water supply, and infrastructure projects.
This specialized 3PE coating line is developed to handle steel pipe bends and elbows, overcoming the challenges of non-linear surfaces. The system integrates surface preparation, epoxy powder spraying, adhesive application, and polyethylene wrapping into a seamless automated process. Equipped with intelligent control systems and precision coating technology, it guarantees uniform thickness, strong adhesion, and long-term corrosion resistance.
Key Features
- Designed specifically for bent and curved steel pipes
- Uniform 3-layer coating (FBE + adhesive + PE)
- High adhesion strength and impact resistance
- Automated control for consistent quality
- Energy-efficient and stable operation
- Suitable for oil & gas, water, and industrial pipelines
Applications
- Oil & Gas Pipeline Systems
- Water Transmission Projects
- Chemical Industry Pipelines
- Infrastructure & Construction
Advantages
- Enhanced corrosion protection
- Adaptability to complex pipe shapes
- Reduced maintenance costs
- Long service life performance
Technical Specifications
| Item |
Name |
Specification |
| 1 |
Diameter of steel pipe |
400, 426, 630, 720, 820, 1000, 1200 mm |
| 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 μm |
| 6 |
AD copolymer adhesive thickness |
170-250 μm |
| 7 |
PE layer thickness |
2.5 - 3.7 mm |
Basic Work Conditions
Process parameters of winding anticorrosion:
Production line size: 20 m × 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
Elbow Conveyor Line Features:
- 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 for Elbow
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
- U-shaped bottom blowback recovery
- Overall material: 304 stainless steel
- Hard negative pressure of recovery air duct does not deform
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
Wrapping Machine
Wrapping Machine Features:
- Automatic belt locking
- One side with corrosion protection
- Continuous operation of winding tape
- Strip wound tightly
- High degree of automation
- Automatic calculation of strip by computer
- Deviation of straight pipe from center does not affect wrapping work
PLC Control System
PLC Control System Capabilities:
- Data collection and editing
- Memory function
- Automatic calculation of strip consumption
- Automatic acquisition and correction of transmission speed
Advanced Technical Features
- Variable Conveyor Line - Handles different pipe diameters, radii, and angles on one production line
- Precise Arc Technology - Eliminates internal stress, ensures accurate bending without springback or deformation
- Coaxial Winding Device - Enables continuous, precise winding for pipes with different diameters
- Advanced Spray Coating - Uniform electrostatic spraying with strong adhesion, hardness, and corrosion resistance
- Efficient FBE Heating - Fluidized boiling technology ensures stable melting, low energy use, and reliable performance
Manufacturer 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 more than 20 years of production experience.
We attach great importance to research and development, collaborating closely with Tsinghua University, Beijing University of Chemical Technology, South China University of Technology and scientific research institutions. By absorbing advanced technology from home and abroad, we now rank among the top 3 manufacturers in the industry in China.
We have been working with more than 400 overseas customers and exporting our products to Kazakhstan, Uzbekistan, Middle East, Russia, Nigeria and more countries.
Our Main Products Include:
- HDPE jacket pipe for pre-insulated pipe Production Line (110-2000mm)
- 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/plate production line
- Pipeline anti-corrosion materials and instruments: heat shrink joint coating sleeve, electro-fusion weldable joint sleeve, portable welding gun (extruder), PE PP welding rod
International Presence
International Trading Show
Client Projects
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