3LPE Coating Pipe Production Line with PLC Control System for 50-100 Years

Product Description

The three-layer PE process utilizes an epoxy powder coating as the bottom layer and is bonded with polyethylene (PE) and adhesive to provide robust anti-corrosion protection for steel pipes. This method is widely adopted both domestically and internationally for oil and gas pipelines as well as civil gas and water supply systems.

The system is designed to deliver stable coating quality, long-term protection, and efficient production performance for pipeline external corrosion protection projects.

Technological Process

Upload Pipes
→ Screw Conveyor for Pipes
→ Rust Removal
→ Intermediate Frequency Heating
→ Epoxy Powder Coating Application
→ Outer Layer Coating (Solid/Liquid & Polyethylene)
→ Cooling Spray
→ Screw Conveyor for Pipes
→ Grinding Pipes
→ Unload Pipes

Equipment Features

Extended Service Life

The three-layer PE coating can extend the lifespan of steel pipes from 5–10 years to 50–100 years, greatly improving return on investment.

Excellent Corrosion Resistance

Using epoxy powder as the base layer, combined with polyethylene and adhesive, the coating forms a strong and effective corrosion barrier against environmental exposure.

High Mechanical Strength

The 3PE coating has good mechanical strength and can withstand external impacts and wear, helping protect the pipe integrity.

Good Electrical Insulation

Excellent insulation properties help prevent electrical corrosion, making it suitable for power and communication pipeline environments.

Environmentally Friendly Process

The coating process minimizes pollution and does not release harmful substances, complying with modern environmental standards.

High Degree of Mechanization

The production process is highly mechanized, ensures stable process parameters, improves production efficiency, and reduces labor intensity.

Versatile Applications

Widely used in oil, gas, water supply, and gas supply industries, meeting diverse market needs.

Low Maintenance Costs

Due to durability and corrosion resistance, 3PE-coated pipelines typically require lower long-term maintenance, reducing operational expenses.

Strong Adhesion

The three-layer structure ensures tight bonding between the coating and steel pipe, minimizing peeling and delamination risk.

Good Thermal Stability

Able to withstand high and low temperature conditions while maintaining excellent physical properties under various climatic environments.

Product Parameters

Steel Pipe Outside Shot Blasting / Derusting Operation Line

Steel Pipe Outside Spiral 3PE Production Line

Platform System

Grooving System

FAQ

Q1. What is the size of pipe diameter your equipment can produce?
A: We can produce four main models:

• Diameter 48–219 mm
• Diameter 219–1220 mm
• Diameter 800–1600 mm
• Diameter 1000–2400 mm

Q2. What is the descaling grade?
A: SA2.5

Q3. What is your anti-corrosion coating standard?
A: Our equipment meets the following standards:

• SY/T0413-2002
• GB/T23257-2009
• German DIN 30670, DIN 30678
• Coating specifications from the American Corrosion Association and DNV
  Fully compliant with SY/T0315-2005 and CNPC38-2002

Q4. What is the delivery time?
A: 2–3 months after deposit.

Q5. What is the production output?
A: Output varies by pipe diameter. Maximum 3 to 8 km/day. Annual processing capacity up to 2 million m² (Φ508 mm).

Q6. What is the coating thickness?
A: 80–800 µm

Q7. In which countries have you sold your 3PE equipment?
A: We have produced nearly 50 sets of 3PE processing lines for countries including Russia, Iran, UAE, India, Belarus, Kazakhstan, and others.

Q8. What is your after-sales service?
A:

• Warranty period: Trial operation before delivery ensures quality.
• Mechanical parts warranty: 12 months from the date of pick-up.
• Electrical parts warranty: 6 months from the date of pick-up.
• Seller will send engineers to the buyer’s factory to test the new machine and train operators.

Company Profile

Qingdao Huashida is one of the largest professional manufacturers and exporters of anti-corrosion and insulation equipment in China. With over 20 years of experience and strong R&D capabilities, we provide both standardized and customized solutions for global clients.

Main products include:

1. HDPE jacket pipe for pre-insulated pipe Production Line (110–2000 mm)
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
7. PP / PE plastic board / sheet / geomembrane production line
8. NBR PVC thermal insulation tube / plate production line
9. Pipeline anti-corrosion materials and instruments: heat shrink joint coating sleeve, electro-fusion weldable joint sleeve, portable welding gun (extruder), PE PP welding rod