3LPE Coated Pipe Process / 3LPE Coated Steel Pipe Supply   

Functionality

• Three-Layer Coating Application
  • The first layer is typically a fusion-bonded epoxy (FBE) coating. This layer provides excellent adhesion to the steel surface and acts as a barrier against moisture and corrosive agents.
  • The second layer is a copolymer adhesive, which bonds the first layer to the third layer.
  • The third layer is a polyethylene (PE) coating. This layer provides mechanical protection, UV resistance, and further enhances the corrosion resistance of the pipeline.
     

    

    Automated Process

    • The production line is designed to automate the coating process. It usually includes sections for steel pipe pre-treatment (such as sandblasting to remove rust and impurities), coating application, curing, and quality inspection.
    • This automation ensures consistent coating quality and high production efficiency.

  Benefits

  • Enhanced Mechanical Strength
    • The polyethylene layer provides excellent impact resistance, protecting the pipeline from mechanical damage during transportation and installation.
    • The overall coating system also helps to prevent stress corrosion cracking, which can be a significant issue in pipelines exposed to harsh environments.
  • Electrical Insulation
    • The 3PE coating system has excellent electrical insulation properties. This is crucial for pipelines that are used in environments where electrical conductivity could lead to corrosion or other issues.
    • The insulation helps to prevent galvanic corrosion, which occurs when two dissimilar metals are in contact in the presence of an electrolyte.
  • Durability
    • The combination of the three layers provides long-term protection against corrosion. The epoxy layer provides a strong bond to the steel, the adhesive layer ensures good interlayer adhesion, and the polyethylene layer offers excellent resistance to environmental factors such as UV radiation, moisture, and chemical attack.
    • This durability means that pipelines coated with 3PE can have a significantly longer service life compared to those with less advanced coatings.

  Applications

  • Oil and Gas Pipelines
    • The 3PE coating is widely used in oil and gas transmission pipelines. These pipelines often need to transport fluids over long distances and through harsh environments, making the corrosion resistance and mechanical strength provided by the 3PE coating essential.
    • The coating helps to prevent leaks and maintain the integrity of the pipeline, which is critical for safety and environmental protection.
  • Water Transmission Pipelines
    • For water pipelines, the 3PE coating provides protection against water-related corrosion. It helps to ensure that the water remains uncontaminated and that the pipeline remains structurally sound.
    • The coating also helps to reduce the risk of biofouling, which can be a problem in water pipelines.
  • Other Fluid Transmission Pipelines
    • The 3PE coating can also be used for pipelines that transport other types of fluids, such as chemicals or wastewater. The coating's resistance to a wide range of corrosive substances makes it a versatile solution for various industrial applications.
  In summary, the 3PE anti-corrosion coating production line is a highly effective solution for enhancing the performance and longevity of steel pipelines. Its ability to provide mechanical strength, electrical insulation, and durability makes it an ideal choice for a wide range of fluid transmission applications.
  
  Coating Structure:
  First Layer: Fusion-bonded epoxy powder (FBE > 100µm)
  Second Layer: Adhesive (AD) 170 ~ 250µm
  Third Layer: Polyethylene (PE) 2.5 ~ 3.7mm
  Key Features:
  ·Enhances pipe lifespan from 5-10 years to 50-100 years
  ·High mechanical strength, excellent electrical insulation, waterproof, wear-resistant, and anti-aging properties
  ·Suitable for harsh environments and corrosive conditions
  Equipment Composition
  Rust Removal Equipment: Includes shot blast cleaning machine, dust collectors, and rust removal PLC control system.
  Coating Equipment: Features powder spraying device, heating system, coating devices, cooling spray, and extruders.
  Platform Equipment: Steel pipe platform, storage platform, hydraulic equipment.
  Groove Equipment: Includes PE beveling machines and lifting machinery.
  Compressed Air Equipment: Air compressors, precision filters, and gas tanks.
  Technological Process
  Pipe Input: Upload pipes
  Conveying: Pipe screw conveyor
  Rust Removal: Intermediate frequency heating
  Coating: Epoxy powder coating, adhesive, and polyethylene
  Cooling: Spray cooling system
  Finishing: Grinding and unloading pipes
  

  Product Parameters

  Specifications
  Pipe Diameter Range: Φ159 ~ Φ1220
  Coating Thickness: 80 ~ 800µm
  Production Output:
  Max. 3-8 km/day
  Annual processing capacity: 2 million square meters (Φ508mm)
  Coating Standards: Meets SY/T0413-2002, GB/T23257-2009, German DIN 30670, American Corrosion Association, and other international standards.
  
  Main Equipment of 3PE anticorrosion processing
  Configuration List

  No.	Name	Set
  A. Derusting Equipment
  1	Pipe-converying Equipment	1
  2	Shot Blast Cleaning Machine	1
  3	Cyclone Dust Collector	1
  4	Pulse dust collector	1
  5	Centrifugal exhaust fan	1
  6	Rust removal equipment PLC	1
  B. Coating equipment
  1	Coating transfer equipment	1
  2	IF heating device	1
  3	Powder spraying device	1
  4	Automatic loading dryer	2
  5	SJ-65/30 Extruder	1
  6	SJ-180/30 Extruder	1
  7	Hot melt adhesive extruder die	1
  8	PE sheet extruder head mold	1
  9	Hot melt adhesive/PE sheet coating device	1
  10	Environmental Protection Ventilation equipment	1
  11	Cooling Spray equipment	1
  C.Platform Equipment
  1	Steel pipe platform	1
  2	Post-rust removal transition platform	1
  3	Product tube storage platform	1
  4	Hydraulic Equipment	3
  D.Groove Equipment
  1	PE Beveling Machine	2
  2	Hydraulic Lifting and Turning Machinery	1
  3	Hydraulic Equipment	1
  4	PLC	1
  E.Compressed air Equipment
  1	Screw Air Compressor	1
  2	Cold dry machine	1
  3	Precision filters	3
  4	Gas tanks	1

  Detailed Photos

  FAQ

  Frequently Asked Questions
  What is the pipe diameter range the equipment can produce?
  -48-219mm, 219-1220mm, 800-1600mm, 1000-2400mm
  What is the sandblasting grade?
  -SA2.5
  What is the anti-corrosion coating standard?
  -Meets multiple international standards, including SY/T0413-2002 and DIN 30670.
  What is the delivery time?
  -2-3 months after deposit.
  What is the production output?
  -Max. 3-8 km/day, annual capacity of 2 million square meters (Φ508mm).
  What is the coating thickness?
  -80 ~ 800µm.
  Where has the 3PE equipment been sold?
  -Countries including Russia, Iran, UAE, India, Belarus, Kazakhstan, etc.
  What after-sales services are offered?
  -Warranty: 12 months for mechanical parts, 6 months for electrical parts.
  Support: Technical services, training, and guidance for operators.

  Packaging & Shipping

  
  Company Profile

  Exhibition

  

  등급 & 리뷰

  전체 평점

  5.0

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  모든 리뷰

  F

  Frank

  Australia Apr 17.2026

  도움 이 될 것 입니다 (3)

  Thank You Huashida

  R

  Rustam Karimov

  Uzbekistan Mar 31.2026

  도움 이 될 것 입니다 (5)

  Top-tier HDPE casing extrusion line for PUR injected pre-insulated pipes. Production speed is fast, pipe dimension accuracy is precise, and every finished casing meets international quality standards. The equipment is well-engineered, low-noise, and designed for long-term heavy-duty use. Ideal for heating networks, geothermal systems, and industrial thermal transmission pipelines. Truly professional production machinery.

  

  

  

  A

  Amir Hossein

  Iran (Islamic Republic of) Feb 4.2026

  도움 이 될 것 입니다 (7)

  5 stars for this high-performance HDPE jacket pipe extrusion line! It works perfectly with PU foam pre-insulated pipe systems, creating strong, weather-resistant outer casing for municipal and industrial heating projects. The extruder is powerful, forming is one-time finished, and raw material utilization rate is very high. Stable continuous operation, solid mechanical design, and great cost performance. Exactly what our pipeline manufacturing plant needed.

  

  

  

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