High-Efficiency 3lpe & Epoxy Coating Line for Superior Steel Pipe Protection

• Extended Lifespan: Increases pipeline longevity dramatically with robust anti-corrosion layers.

• High Automation: Features PLC central control and an interactive HMI screen for precise management.

• Versatility: Handles pipes from 32mm to 3000mm in diameter, customizable to user requirements.

• Eco-Friendly Operation: Integrated dust removal and powder recovery systems minimize environmental impact.

• Proven Global Track Record: Nearly 50 lines sold worldwide, including in Russia, Iran, UAE, India, and Kazakhstan.

Application

The three-layer PE (3LPE) process utilizes an epoxy powder bottom layer for adhesion, followed by a copolymer adhesive and a polyethylene top layer. This system is widely used for:

• Oil and natural gas transmission pipelines

• Chemical material transport

• Water supply pipelines

• Slurry pipelines

Production Line Components

The 3LPE coating line is a fully integrated system comprising the following key modules:

1. Steel Pipe Conveyor System

• Automated Adjustment: Conveyor rollers automatically adjust based on pipe size; unified opening, closing, and angle control.

• Intelligent Control:  PLC with a central computer and interactive HMI.

• Robust Design: Each wheel set has independent power, allowing a spiral angle of up to 30° and variable transmission speed (0-6 m/min). Solid wide-surface tires (load capacity: 2.5 tons per wheel) with a glue layer thickness >85mm ensure stable, long-term operation.

2. Steel Pipe Blasting Equipment (Internal & External)

• Surface Preparation: Removes rust, scale, and contaminants to achieve a Sa2.5 descaling grade, ensuring optimal coating adhesion.

3. Dust Removal System

• Cleaning: Utilizes a fan and pulse back-blowing dust collector to clean dust and abrasives from the pipe surface post-blasting, preventing contamination during coating.

4. Steel Pipe Heating Equipment

• Preheating: Burner heating (gas/diesel) raises pipe temperature to 40-60°C before blasting to remove moisture and grease.

• Coating Heating: Intermediate frequency (IF) heating raises the pipe to 180°C - 230°C to meet FBE and adhesive coating standards.

5. Fusion Bonded Epoxy (FBE) Powder Coating & Recovery System

• Application: Stainless steel coating room equipped with electrostatic powder guns and a fluidization powder box.

• Recovery: Dual cyclone collecting structure paired with a pulse-blowback cylinder dust catcher for efficient powder recycling.

6. Extrusion & Wrapping System (Adhesive & PE Layer)

• Layering: Extrudes the adhesive and outer PE/PP layer onto the pipe. Available in cladding or wrapping types (side or upper configuration) to suit different production layouts.

7. Water Cooling System

• Rapid Cooling: Cools the coated pipe from high temperatures down to 40-60°C using a water cooling room, tower, and pump system to protect the newly formed anti-corrosion layer.

8. Cutback Machine (End Beveling)

• End Finishing: A double-head high-efficiency machine that removes the coating from pipe ends, forming a groove (<30°) for easy field welding. Includes steel brushes, polishing motors, and a high-efficiency dust collector.
  
  
  3 layer PE anti-corrosion coating consist of first FBE coating, middle adhesive layer, and outer polyethylene layer.

• Technical Parameters & Q&A

  Q1: What pipe diameters can your equipment handle?
  A: We offer four main models covering:

• 48-219mm

• 219-1220mm

• 800-1600mm

• 1000-2400mm

• Q6: What is your delivery time?
  A: 2-3 months after receiving the deposit.

  Q7: Where have you installed these lines?
  A: We have successfully delivered nearly 50 sets worldwide, including in Russia, Iran, UAE, India, Belarus, and Kazakhstan.

  Q8: What after-sales service do you provide?
  A:

• Warranty: 12 months for mechanical parts, 6 months for electrical parts (from the date of pick-up).

• Technical Support: We provide comprehensive technical services, including training and guidance for buyer's operators.

• Q2: What is the achievable descaling grade?
  A: Sa 2.5 (Near-White Metal).

  Q3: What coating standards do you meet?
  A: Our equipment meets international standards including SY/T0413-2002, GB/T23257-2009, German DIN 30670, DIN 30678, as well as specifications from the American Corrosion Association and DNV.

  Q4: What is your production output?
  A: Output varies by diameter. The maximum capacity is 3 to 8 km/day, with an annual processing capacity of up to 2 million square meters (based on Φ508 mm pipe).

  Q5: What is the typical coating thickness?
  A: 80 - 800 µm (microns).

Why Choose Huashida? 

With nearly 50 successful installations globally, Huashida is a trusted name in pipeline anti-corrosion solutions. We don't just sell machines; we provide turnkey solutions tailored to your project needs.

Contact us today to discuss your specific requirements!