The 3PE (Three-Layer Polyethylene) coating stands as a leading advancement in corrosion-resistant technology. Its engineered structure integrates a fusion-bonded epoxy (FBE) inner layer for superior adhesion, a tough adhesive (AD) intermediate layer for strong molecular bonding, and a high-durability polyethylene (PE) outer layer that delivers long-term external protection.
This carefully designed multi-layer system provides outstanding mechanical robustness, excellent electrical insulation properties, and stable, reliable processing performance. In addition, its environmentally conscious composition makes it an ideal solution for protecting oil and gas transmission lines, municipal water pipelines, and modern district heating networks.
Pipe Loading → Conveying → Shot Blasting (Rust Removal) → Induction Heating → FBE Coating → AD & PE Extrusion Coating → Water Cooling → Conveying → Pipe End Grinding → Unloading
Main Equipment Composition
Surface Treatment Excellence: Featuring a robust shot blasting machine, complemented by an efficient cyclone dust collector and a high-performance pulse dust remover, ensuring impeccable surface treatment.
Advanced Heating System: Utilizing state-of-the-art induction heating equipment to deliver consistent thermal energy, optimizing the coating process.
Comprehensive Coating System: Equipped with an FBE powder coating unit, an adhesive extruder, and a PE extruder, ensuring a seamless and durable coating application.
Effective Cooling System: Incorporating a water spraying and cooling device to maintain ideal temperatures and enhance coating quality.
Efficient Conveying System: Featuring a sophisticated pipe loading/unloading platform and turning rollers for smooth and seamless operations.
Intelligent Control System: Powered by a cutting-edge PLC automatic control system, delivering precise and reliable process management.
Auxiliary Equipment Excellence: Includes a PE beveling machine, a hydraulic lifting system, and a comprehensive exhaust & ventilation system to support seamless operations.
Cost Reduction - Achieve exceptional cost-effectiveness with our solution, which delivers superior sealing performance, reduces energy consumption, and supports environmentally responsible operation.
Extended Service Life - Designed for easy installation and streamlined construction, our product provides a remarkable service lifespan of 30-50 years, offering outstanding long-term reliability.
Outstanding Impact Resistance - Engineered for resilience, the product maintains excellent impact resistance even in low-temperature environments, while its very low water absorption further strengthens overall durability.
Enhanced Anti-Corrosion Protection - Enjoy reliable, high-level corrosion resistance through a simple yet highly economical process, ensuring long-term asset protection and performance stability.
Fully Automated Operation - Equipped with an advanced PLC control system and intelligent sensing technology, the system ensures precise, efficient operation by continuously monitoring position, speed, and energy usage.
| Steel pipe outside shot blasting derusting operation line | |||
| No. | Description | Qty. | Remarks |
| 1 | Transmission line | 1set | |
| 2 | Shot blasting derusting line | 1set | |
| 3 | Cyclone dust collector | 1set | |
| 4 | Pulse filter cartridge dust collector | 1set | |
| 5 | Centrifugal wind blower | 1set | |
| 6 | Derusting equipment electrical control system | 1set | |
| Steel pipe outside spiral 3PE production line | |||
| No. | Description | Qty. | |
| 1 | Coating transmit system | 1set | |
| 2 | Intermediate frequency heating system | 1set | |
| 3 | Epoxy spraying system | 1set | |
| 4 | Automatic feeding dryer | 2sets | |
| 5 | SJ-65/30 single screw high efficiency extruder | 1set | |
| 6 | SJ-120/30 extruder | 1set | |
| 7 | Hot melt adhesive extrusion die head | 1set | |
| 8 | PE sheet extrusion die head | 1set | |
| 9 | Hot melt adhesive/PE sheet press device | 1set | |
| 10 | Stainless steel spray powder chamber | 1set | |
| 11 | Cooling water spray system | 1set | |
Platform system |
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| No. | Description | Qty. | |
| 1 | Steel pipe up load platform | 1set | |
| 2 | Derusting transition platform | 1set | |
| 3 | Finished pipe storage system | 1set | |
| 4 | Hydraulic system | 3sets | |
| Grooving system | |||
| No. | Description | Qty. | |
| 1 | PE grooving device | 2sets | |
| 2 | Hydraulic elevating pipe turner | 2sets | |
| 3 | Operating cabinet | 1set | |
The remarkable 3-layer PE coated steel pipes from Qingdao Huashida Machinery Co., Ltd. are ingeniously designed for a diverse range of applications, including:
Oil and gas transmission pipelines - expertly engineered to deliver unparalleled long-term protection against both corrosion and external damage, ensuring the safe transport of vital resources.
Urban gas and water supply systems - meticulously crafted to guarantee safe, clean, and reliable transport of essential fluids, enhancing the efficiency and safety of urban infrastructure.
District heating networks - designed to excel in maintaining insulation and resistance to corrosion, even under challenging high-temperature conditions, ensuring seamless service delivery.
Underground and industrial anti-corrosion projects - providing robust, long-lasting protection for both buried and exposed steel pipelines, safeguarding structural integrity across diverse environments.
Global Application:
This state-of-the-art coating technology has been triumphantly applied in monumental infrastructure projects, securing its reputation both domestically and on an international scale.
Our products have successfully reached a global audience, with exports spanning Europe, the Middle East, Central Asia, Africa, Russia, and numerous other regions worldwide.
Our dedicated team
consistently ensures timely delivery,
participates in prestigious exhibitions,
and upholds industry-leading certifications.
