| Hot Selling Pipes |
| Steel Wire Reinforced PE Composite Pipe |
Fiberglass Steel Wire Reinforced Composite Pipe |
HDPE Pipe |
PVC Pipe |
| Antistaic Flame Redartant Composite Pipe for Mining |
Anti-corrosion Composite Pipe |
Thermal Insulated Pipe |
Big Carliber Composite Steel Pipe |
The 3PP coating stands as the ultimate guardian for pipelines conveying high-temperature media, making it an indispensable anti-corrosion ally in desert terrains where surface temperatures soar and sunshine is relentless. This superior coating has gained extensive acclaim and is now a preferred choice for protecting buried water, gas, and oil pipelines in regions with extreme heat and prolonged sunlight exposure.
Our Epoxy & Plastic coated anti-corrosion steel pipes offer versatile solutions tailored to meet various operational demands. These pipes are ideal for a range of environmental conditions including buried installations, trenchless traction, pipe jacking, and open-air applications. Explore our specialized anti-corrosion solutions designed to excel under specific conditions:
- Buried: Inner epoxy with outer PE, inner epoxy with outer 3PE, inner epoxy with outer 3PP, and both inner & outer epoxy coated.
- Pipe Jacking: Inner epoxy with outer 3PE, inner epoxy with outer 3PP, and inner epoxy with a double layer of epoxy.
- Trenchless Traction: Inner epoxy with outer 3PE, inner epoxy with outer 3PP, and inner epoxy with a double layer of epoxy.
- Open-air Application: Inner epoxy with an outer anti-UV coating.
The Inner epoxy resin outer polyethylene coating composite steel pipe begins with a pre-treated steel base. It undergoes meticulous heating, with its inner surface being flawlessly coated with fusion bonded epoxy powder, while the outer surface is enveloped in a polyethylene powder. The result is a corrosion-resistant steel-plastic composite pipe exhibiting unparalleled performance.
The flexible cap and insert coated plastic steel pipe starts with a superior steel pipe foundation. One end is bevelled, the other end is flared, and both are subsequently coated with plastic. A T-shaped rubber ring, mirroring the structure of a spherical ink pipe, directly connects with the cap and insert. While retaining the coated steel pipe's benefits, it also incorporates the rapid and dependable connection characteristics of ductile iron pipe flexible sockets. This fusion of strengths creates a superior, reliable connection method.
| Clamp Connection |
Flange Connection |
Exceptional Compatibility and User-Friendly Connection
Both the inner and outer layers of the double-layer epoxy are coated with an epoxy resin layer, ensuring excellent compatibility. Utilizing solvent-free epoxy coating technology, it offers good compatibility coupled with outstanding corrosion resistance.
Superior Cathodic Protection
The double-layer epoxy coating ensures seamless compatibility with cathodic protection, without compromising the protective shield.
Exceptional Flexibility and Bending Resistance
Crafted with high molecular weight epoxy resin, the coating material delivers remarkable flexibility and superior resistance to bending.
Outstanding Scratch Resistance
The outer layer features a modified epoxy coating enhanced with specialized scratch-resistant materials, providing excellent resistance to abrasion.
High-Temperature Durability
The double-layer epoxy anti-corrosive steel pipe can withstand extreme temperatures, up to a maximum of 110ºC.
1. Pipe sizes range from DN50 to DN3600, with lengths varying between 6 to 16 meters per piece.
2. Equipped with 2 powder coating production lines and 12 twin-screw extruders, we possess advanced capabilities for powder coating and polyethylene material modification R & D.
3. As the leading manufacturer of diverse powder anticorrosion processes, we offer suction coating, spraying, rolling coating, dip coating, and more.
4. We are the only enterprise in the nation that integrates large-caliber steel pipe production, anti-corrosion processing, and anti-corrosion material manufacturing.
5. Ensuring the safety and reliability of socket-type anti-corrosion steel pipes.
| Nominal Diameter/ mm |
Inner Coating Layer /mm |
Outer coating layer,mm |
| Ordinary level |
Strengthen level |
| DN ≤65 |
>0.3 |
>0.6 |
>0.8 |
| 65≤DN≤150 |
>0.35 |
>0.8 |
>1.0 |
| 150≤DN≤300 |
>0.35 |
>0.8 |
>1.2 |
| 300≤DN≤800 |
>0.4 |
>1.0 |
>1.3 |
| 800≤DN≤1200 |
>0.45 |
>1.2 |
>1.8 |
| 1200≤DN≤3600 |
>0.45 |
>1.5 |
>1.8 |
| Note: can be customized as customer's needs. |
Production Technology
| Uniform Plastic Coating |
Comprehensive Automative Line |
High Quality Steel Roll |
| Biggest 3600 Production Line |
CNAS Labratory |
One-code track |
About Us
Shandong Donghong Pipe Industry Co., Ltd. (referred to as: Donghong Co., Ltd., stock code: 603856) is headquartered in Qufu, China, the hometown of Confucius. As a premier engineering pipeline manufacturer, service provider, and general contractor, we specialize in four key categories of functional and customized pipelines: special pipelines for rainwater and sewage diversion, municipal areas, industrial and mining zones, and national key engineering projects. Our industrial ecosystem thrives with contributions from design institutes, financial institutions, port logistics, construction units, and both upstream and downstream enterprises. We are dedicated to becoming a global leader in comprehensive pipeline system solutions, aiming to revolutionize human life through intelligent pipelines and ensuring the constant safety of pipeline transportation.
Donghong boasts an impressive team of over 200 R&D experts and holds more than 100 patents. Leveraging national R&D platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, we are at the forefront of research in the digitization, informatization, and intelligence of pipeline engineering. We lead the industry, contributing to national key strategic projects and essential public works, including the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road initiatives, standardized farmland, urban and rural water supply integration, Liren gas, and centralized heat supply projects.
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