3LPE Coating Production Line for Bend and Elbow Steel Pipes with 400-1500 mm Specification and Automated Control

The 3PE Coating Equipment Line for Steel Pipe Elbow 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. The equipment is designed to meet international standards, ensuring reliability in harsh environments and extending the service life of pipelines. 

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

Basic work condation:
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.

Elbow conveyor line

Independent center of rotation drive

Gear ring gear drive

frequency control 

The main parts adopt protective supporting wheel

The supporting wheel is equipped with slide rail, which is easy to install

Fixed angle of self-locking structure of transmission line

Height lift adjustment

Medium frequency heating

Angle handwheel adjustment

Front and rear electric adjustment

The height is adjusted through the conveyor line

Narrow thickness to avoid uneven heating in bending section

If power 350kW

Voltage and current double close regulation

Powder spraying for elbow

Annular dusting chamber

Front and rear electric adjustment of powder spraying chamber

The spray gun swings left and right

CNC adjustment of powder quantity

There are 12 powder guns

U-shaped bottom blowback recovery

Overall material 304 stainless steel

The hard negative pressure of recovery air duct does not deform

Powder injection recovery

The drawing air duct is suitable for the change of pipe diameter.

Cyclone + filter cartridge dust removal standard discharge.

U-shaped bottom structure + pulse back blowing to recover powder more thoroughly.

304 stainless steel fluidization tank, vibrating screen powder filter, equipped with 12 venturi powder pumps.

Wrapping machine

Automatic belt locking

One side with corrosion protection

Continuous operation of winding tape

The strip is wound tightly

High degree of automation

Automatic calculation of strip by computer

The deviation of straight pipe from the center does not affect the wrapping work

PLC control systerm

Data collection

Editting

With memory function

Automatic calculation of strip consumption

Automatic acquisition and correction of transmission speed

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.

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. 
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 are always 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 home and abroad, we now rank one of 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. 

 

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Thank you for your interest in Qingdao Huashida Machinery Co., Ltd. equipment.

For further details, please feel free to contact us at any time. Our team will respond promptly and provide a fully customized solution tailored to your specific requirements and project needs.