High Speed FBE 3LPE Internal External Coating Line for Oil Gas Pipelines
Product Overview
This High Speed FBE 3LPE Internal External Coating Line is a full-automatic, high-throughput internal and external anti-corrosion coating production line purpose-engineered for simultaneous factory-grade internal FBE powder coating and external 3LPE coating of steel pipes at 0-6m/min adjustable high speed - the internationally recognized dual-wall protection standard for oil and gas pipeline construction, long-distance buried pipeline networks, municipal water supply infrastructure, and offshore/onshore EPC pipeline projects worldwide.
Unlike external-only coating systems, this DNV certified high speed FBE 3LPE coating line processes both pipe walls in one continuous automated pass at 3-8 km/day processing output - delivering simultaneous internal Fusion Bonded Epoxy (FBE) coating for chemical media resistance and external three-layer polyethylene (3LPE) protection for mechanical impact resistance and cathodic disbondment protection.
Certified to DNV, SY/T0413, GB/T23257, DIN 30670, DIN 30678, SY/T0315-2005, and CNPC38-2002 - the most comprehensive multi-standard compliance available for oil and gas pipeline coating lines in this category.
Technical Process
Coating Principle
The High Speed Internal FBE + External 3LPE Dual-Wall Anti-Corrosion System:
Internal Wall - Fusion Bonded Epoxy (FBE) Coating:
Fusion Bonded Epoxy (FBE) powder is a thermosetting, non-toxic anti-corrosion coating material. After high-temperature curing, it forms a high-molecular cross-linked dense protective structure with outstanding chemical anti-corrosion performance, wear resistance, anti-aging properties, and mechanical strength.
- Exceptional chemical resistance against transported oil, gas, water, acid, and alkali media in buried oil and gas pipeline service
- Strong cathodic disbondment resistance - the critical DNV-verified performance standard for buried oil and gas pipeline internal coating
- Low friction inner wall surface - reducing fluid transmission resistance and improving long-distance oil and gas pipeline conveying efficiency
- Zero toxicity - safe for potable water supply pipeline internal coating applications
External Wall - Three-Layer Polyethylene (3LPE) Coating System:
Layer 1 - FBE Epoxy Base Layer: Forms a high-molecular cross-linked dense protective structure after high-temperature curing, closely bonding with the Sa2.5 shot-blasted outer steel pipe surface - delivering excellent adhesion, acid/alkali resistance, and cathodic disbondment resistance meeting DNV and DIN 30670 standards.
Layer 2 - Polymer Adhesive Middle Layer: Hot melt adhesive layer perfectly combines with uncured FBE epoxy powder while simultaneously bonding to the outer polyethylene layer - forming the critical structural bridge that ensures long-term delamination resistance of the finished 3LPE anti-corrosion coating in buried oil and gas pipeline service conditions.
Layer 3 - High-Density Polyethylene (HDPE) Outer Protective Layer: Provides mechanical impact resistance, abrasion protection, and a waterproof barrier against soil stress and groundwater - delivering the complete three-layer polyethylene (3LPE) anti-corrosion system required by DIN 30670, BS EN 10329, AWWA C215, and DNV international pipeline coating standards.
Product Characteristics
- 0-6m/min High Speed Output: Adjustable line speed sustains 3-8 km/day processing throughput - the highest speed configuration in this product category
- DNV Certified Internal External Coating Line: The only high speed coating line configuration in this product family holding DNV certification
- Simultaneous Internal FBE + External 3LPE Coating: Processes both pipe walls in one continuous high-speed automated pass
- 99.8% Operation Stability: Confirmed by 100% factory trial run before delivery
- Sa2.5 Internal and External Shot Blasting: Achieves Sa2.5 international surface cleanliness on both pipe walls simultaneously
- Multi-Standard EPC Compliance: Meets SY/T0413, GB/T23257, DIN 30670, DIN 30678, DNV, SY/T0315-2005, and CNPC38-2002 simultaneously
- Zero-Emission Powder Recovery System: Equipped with cyclone and pulse dust collector and zero-emission powder recovery, fully compliant with CE and ISO14001 environmental standards
Equipment Core Components
| No. |
Name |
Set |
| A. Derusting Equipment |
| 1 | Pipe-conveying 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 |
Process Adaptability
Flexible to support internal FBE only, external 3LPE only, or simultaneous internal FBE + external 3LPE dual-wall high-speed coating; compatible with 2LPE and 2LPP external configurations - fully adapting to long-distance oil and gas pipeline anti-corrosion, municipal water supply buried pipelines, offshore pipeline construction, and multiple large EPC infrastructure pipeline engineering scenarios.
Available diameter configurations: Φ325-1200mm, Φ325-1620mm, Φ325-1820mm, Φ508-1620mm, Φ508-2540mm, Φ508-3600mm, Φ508-4200mm.
Energy-Efficient and Stable High-Speed Performance
Precise medium-frequency induction heating system reaches ±2°C temperature accuracy while consuming less power than conventional heating methods - ensuring uniform FBE epoxy powder melting and firm 3LPE coating adhesion at 0-6m/min adjustable high speed. Adjustable spiral conveyor speed fits different steel pipe diameters, keeping stable ≤250m²/h processing capacity and consistent internal external oil and gas pipeline anti-corrosion coating quality throughout continuous high-speed production runs.
Environmental Compliance
Equipped with a professional cyclone and pulse dust collector and zero-emission powder recovery system, fully compliant with CE and ISO14001 environmental standards for steel pipe internal external derusting and coating production. Zero dust pollution meets global factory environmental requirements - supporting green manufacturing initiatives and international EPC oil and gas pipeline project environmental compliance requirements.
Global Service Network
We have completed 50+ high speed internal external FBE 3LPE coating line projects at home and abroad, with equipment installed and operating in oil and gas pipeline, municipal water supply, and EPC infrastructure projects across Russia, Iran, the United Arab Emirates, India, Belarus, Kazakhstan, and more - gaining wide recognition from global oil and gas pipeline contractors and EPC project teams.
Frequently Asked Questions
Q1. What pipe diameter range does this external 3LPE coating line cover?
A: 325-4200mm - the full small-to-large bore spectrum for oil & gas pipeline external coating, available in configurations including Φ325-1200mm, Φ325-1620mm, Φ325-1820mm, Φ508-2540mm, Φ508-3600mm, and Φ325-4200mm.
Q2. Does this line apply internal coating as well?
A: No - this line is configured exclusively for external shot blasting and 3LPE coating, making it the right-sized solution for projects specifying external-only anti-corrosion protection.
Q3. What surface cleanliness standard does external shot blasting achieve?
A: Sa2.5 international surface cleanliness standard, ensuring maximum 3LPE coating adhesion and zero delamination risk in buried oil & gas service.
Q4. What is the processing capacity?
A: ≤250m²/h sustained throughput across the full 36-4200mm diameter range.
Q5. What is the coating thickness?
A: FBE base layer 80-800μm; total 3LPE coating thickness customizable according to project pipeline specifications and international standards (DIN 30670, BS EN 10329).
Q6. What is the delivery time?
A: 2-3 months after deposit confirmation.
Q7. What is the warranty and service scope?
A: 12-month mechanical warranty / 6-month electrical warranty. Pre-sale: free workshop planning and capacity assessment; Sale: on-site engineer installation and commissioning, free operator training; After-sales: 24-hour remote technical support for the operating life of the equipment.
Company Profile
Qingdao Huashida Machinery Co., Ltd. was established in 2003. For over 21 years, Huashida has focused on R&D and production of high speed FBE 3LPE internal external coating lines, DNV certified oil and gas pipeline coating systems, polyurethane insulation pipe production lines, large-diameter underground pipeline equipment, and plastic pipe fitting production machinery.
We maintain long-term technical cooperation with Tsinghua University, Beijing University of Chemical Technology, South China University of Technology, and other national research institutions. By integrating advanced global technologies and international standards, we have become one of the top 3 pipeline coating machinery manufacturers in the Chinese industry, with 50+ international oil and gas pipeline EPC coating projects completed across 60+ countries worldwide.
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