Steel Elbow Hot Bending Pipe 3PE Coating Production Line with Automatic Shot Blasting System

This equipment is specially designed for the surface treatment and 3-layer PE (3PE) coating of hot bending pipes, as well as certain section steel and structural parts with suitable dimensions. The integrated production line combines shot blasting, intermediate frequency heating, 3PE coating, and rapid cooling into one continuous process. It effectively removes surface rust, welding slag, and stress, while enhancing coating adhesion and improving the overall mechanical and anti-corrosion performance of the pipe.

• Pipe Transportation System: Ensures smooth and stable movement of the pipes throughout the entire coating process.
• Shot Blasting Machine: Removes rust, oxide scale, and welding slag from the pipe surface to improve coating adhesion and surface roughness.
• Intermediate Frequency Heating System: Maintains optimal pipe temperature to ensure proper fusion and curing of each coating layer.
• 3PE Coating System: Precisely applies the three coating layers: Fusion Bonded Epoxy (FBE), adhesive, and polyethylene (PE), ensuring strong bonding and consistent coverage.
• Spray Cooling System: Rapidly cools and solidifies the coating layer, improving adherence and surface finish.

• Fusion Bonded Epoxy (FBE) Layer: Provides excellent chemical resistance and strong adhesion. It forms a high-strength, cross-linked molecular structure after curing.
• Adhesive Layer: Acts as a bonding bridge between the epoxy layer and polyethylene outer layer, ensuring cohesive strength across all three layers.
• Polyethylene (PE) Outer Layer: Offers excellent resistance to abrasion, mechanical impact, and moisture. It serves as the main protective barrier in underground or exposed pipeline environments.

The equipment is suitable for hot bend pipes with diameters of 426 mm, 630 mm, 720 mm, and 820 mm. It supports bending radii of 4D to 6D and angles between 15 and 90 degrees. Pipe wall thickness should range between 8 mm and 12 mm.

Additional Parameters:

• Coating thickness meets international anti-corrosion standards
• General equipment dimensions: approximately 20 meters by 15 meters
• Water consumption: around 30 cubic meters per cycle
• Total power consumption: 450 kilowatts
• Gas usage: about 6 cubic meters per minute
• Recommended operating temperature inside workshop: no less than 5°C

• Oil and Gas Pipelines: Enhances corrosion resistance and ensures safe transportation of fuels over long distances.
• Municipal Water Supply Systems: Prevents internal contamination and ensures clean, long-lasting water delivery.
• Industrial Fluid Transport: Ideal for transporting chemicals and other industrial fluids with high reliability.

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, etc.