Automatic PLC Controlled 3LPE Coating Line With 3 Layers Anti-Corrosion For

Product Description

The 3PE (Three-Layer Polyethylene) coating system represents one of the most advanced anti-corrosion technologies for steel pipelines. Its optimized multilayer structure consists of:

• Fusion Bonded Epoxy (FBE) inner layer for excellent adhesion and chemical resistance
• Adhesive (AD) middle layer for strong molecular bonding
• High-density Polyethylene (PE) outer layer for superior mechanical protection and long-term durability

This scientifically engineered coating structure offers:

• Excellent corrosion resistance
• Strong mechanical impact resistance
• Outstanding electrical insulation performance
• Stable and reliable processing quality
• Environmentally friendly production

It is widely applied in:

• Oil and gas transmission pipelines
• Municipal water supply systems
• Urban gas pipelines
• District heating networks
• Underground industrial anti-corrosion projects

Technological Process

Pipe Loading
→ Conveying
→ Shot Blasting & Rust Removal
→ Induction Heating
→ FBE Powder Coating
→ Adhesive & PE Extrusion Coating
→ Water Cooling
→ Pipe Conveying
→ Pipe End Grinding
→ Pipe Unloading

Surface Treatment System

• Shot blasting machine
• Cyclone dust collector
• Pulse cartridge dust remover
• Centrifugal exhaust blower

Ensures excellent surface cleaning quality and improves coating adhesion.

Advanced Heating System

Adopts high-efficiency induction heating equipment to provide stable and uniform heating for coating processing.

Comprehensive Coating System

Includes:

• FBE powder coating unit
• Adhesive extruder
• PE extruder
• Hot melt adhesive extrusion die head
• PE sheet extrusion die head

Guarantees uniform and durable coating application.

Efficient Cooling System

Water spraying and cooling devices ensure rapid cooling and stable coating quality.

Intelligent Conveying System

Equipped with:

• Pipe loading/unloading platforms
• Conveying rollers
• Hydraulic turnover systems

Ensures smooth and efficient operation throughout the production line.

PLC Automatic Control System

The intelligent PLC system monitors:

• Production speed
• Pipe position
• Temperature
• Energy consumption

Achieving fully automatic, precise, and stable production.

Auxiliary Equipment

• PE beveling/grooving machine
• Hydraulic lifting and pipe turning system
• Exhaust and ventilation system

Supporting safe and efficient operation.

Advanced Technology

Adopts internationally advanced 3LPE / 3LPP coating technology with stable operation and excellent coating quality.

Rich Production Experience

More than 20 years of manufacturing experience and over 400 global customer cases.

Professional Technical Team

Supported by:

• 9 senior professional engineers
• High-end plastic machinery expert workstation

Providing strong technical support and customized solutions.

Complete Service System

Provide full-process services including:

• Process design
• Equipment manufacturing
• Installation
• Commissioning
• Technical training
• After-sales support

Helping customers quickly start production.

Energy Saving & Environmental Protection

High sealing performance and efficient ventilation systems greatly reduce energy consumption and environmental pollution.

Long Service Life

The coating system offers a service life of up to 30–50 years with excellent durability and reliability.

Excellent Impact Resistance

Maintains strong mechanical performance and low water absorption even under low-temperature conditions.

Superior Anti-Corrosion Performance

The multilayer coating structure provides:

• Excellent adhesion
• Chemical corrosion resistance
• Cathodic disbondment resistance
• Wear resistance

Widely recognized in the global pipeline industry.

Fully Automatic Operation

PLC intelligent control system with sensors ensures:

• High automation
• Reduced labor cost
• Stable production quality
• Precise operation management

Steel Pipe Shot Blasting & Derusting Line

Steel Pipe Spiral 3PE Production Line

Platform System

Grooving System

Oil & Gas Transmission Pipelines

Provides long-term corrosion protection and mechanical protection for buried steel pipelines.

Urban Gas & Water Supply Systems

Ensures safe, reliable, and clean fluid transportation.

District Heating Networks

Offers excellent insulation and corrosion resistance under high-temperature conditions.

Industrial & Underground Projects

Suitable for underground pipelines and industrial anti-corrosion engineering applications.

The 3LPE coating technology has been successfully applied in large-scale infrastructure projects worldwide.

Products are exported to:

• Europe
• Middle East
• Central Asia
• Africa
• Russia
• Southeast Asia
• South America

Including countries such as:
Kazakhstan, Uzbekistan, Iran, Turkey, Russia, Nigeria, UAE, Sudan, and many others.

Qingdao Huashida Machinery Co., Ltd.

Qingdao Huashida Machinery Co., Ltd. is a professional manufacturer specializing in:

• Plastic pipe machinery
• Municipal pipe machinery
• Pipe insulation equipment
• Steel pipe anti-corrosion equipment
• Pipeline anti-corrosion materials

With more than 20 years of manufacturing experience, Huashida has served over 400 customers worldwide.

Main Products

1. HDPE jacket pipe production lines for pre-insulated pipes (110–2000mm)
2. Rigid pre-insulated pipe production lines
3. Flexible pre-insulated PERT pipe production lines
4. Steel pipe anti-corrosion coating lines (FBE / 2LPE / 3LPE)
5. Steel pipe derusting production lines
6. PE water & gas supply pipe extrusion lines
7. PP/PE board, sheet, and geomembrane production lines
8. NBR/PVC rubber foam insulation tube and sheet production lines
9. Pipeline anti-corrosion materials and welding equipment

Huashida products are exported globally and widely recognized for stable quality, advanced technology, and professional service.