| 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 |
3PP Coating: Delivering Excellence in High-Temperature Media Transport and Desert Environments. Our advanced 3PP coating technology is engineered for superior anti-corrosion protection, making it ideal for pipelines carrying high-temperature media and those located in desert areas with high surface temperatures and extended sunlight exposure. This technology is increasingly employed in buried water, gas, and oil pipelines in such demanding conditions, offering unparalleled durability and reliability.
Epoxy & Plastic Coated Anti-Corrosion Steel Pipes: Versatile Solutions for Diverse Conditions. Our innovative epoxy and plastic-coated anti-corrosion steel pipes are designed to meet a variety of operational needs. Suitable for environments such as buried, trenchless traction, pipe jacking, and open-air applications, we offer a range of anti-corrosion solutions tailored to specific conditions:
- Buried Applications: Inner epoxy with outer PE, inner epoxy with outer 3PE, inner epoxy with outer 3PP, and inner & outer epoxy-coated options provide robust protection.
- Pipe Jacking: Enhanced protection with inner epoxy and outer 3PE, inner epoxy and outer 3PP, or inner epoxy with a double layer of epoxy for resistance and reliability.
- Trenchless Traction: Designed for durability, options include inner epoxy with outer 3PE, inner epoxy with outer 3PP, and inner epoxy with double layer epoxy coatings.
- Open-Air Application: Superior protection with solutions like inner epoxy and outer anti-UV coatings, ensuring long-lasting performance.
Inner Epoxy Resin Outer Polyethylene Coating Composite Steel Pipe: A Superior Fusion of Durability and Performance. Our composite steel pipes feature a pre-treated steel base, heated and coated on the inner surface with fusion-bonded epoxy powder, and on the outer surface with polyethylene powder. This dual-coating process results in a corrosion-resistant, steel-plastic composite product, designed to deliver exceptional performance and longevity in a wide range of applications.
The flexible cap and insert coated plastic steel pipe is crafted from premium-grade steel pipe. One end is meticulously bevelled, while the other end is expertly flared and then coated with a protective plastic layer. Utilizing a T-shaped rubber ring, similar in structure to a spherical ink pipe, ensures a seamless connection with the cap and insert. This innovative design not only retains the core benefits of coated steel pipes but also integrates the speed and reliability of ductile iron pipe flexible socket connections. Thus, it harmonizes the strengths of both systems to deliver superior performance and reliability.
| Clamp Connection |
Flange Connection |
Outstanding Compatibility and Effortless Connection
The inner and outer coatings of the double-layer epoxy are based on high-quality epoxy resin, ensuring excellent mutual compatibility. Our patented, solvent-free epoxy coating delivers exceptional compatibility and superior corrosion resistance, making it an ideal choice for demanding applications.
Exceptional Cathodic Protection
The double-layer epoxy coating is superbly compatible with cathodic protection systems, effectively preventing any shielding of the cathodic protection.
Superior Flexibility and Bend Resistance
Crafted from high molecular weight epoxy resin, our coating material exhibits outstanding flexibility and extraordinary resistance to bending, ensuring durability and longevity.
Unmatched Scratch Resistance
The outer layer features a modified epoxy coating embedded with a special scratch-resistant material, offering unparalleled scratch resistance for enhanced durability.
High Temperature Endurance
Our double-layer epoxy anticorrosive steel pipe can withstand extreme temperatures, with a maximum threshold of 110ºC, making it suitable for high-temperature applications.
1. Caliber range: DN50 ~ DN3600, with each pipe available in lengths from 6 to 16 meters.
2. Equipped with 2 powder coating production lines and 12 twin-screw extruders, we boast comprehensive capabilities in powder coating and polyethylene material modification R&D and production.
3. As the leading manufacturer in various powder anticorrosion processes, we specialize in suction coating, spraying, rolling coating, dip coating, and other advanced methods.
4. We are the sole enterprise in the nation that integrates large-caliber steel pipe production, anti-corrosion processing, and anti-corrosion materials manufacturing under one roof.
5. Ensuring the safety and reliability of our socket-type anti-corrosion steel.
| 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, renowned as the birthplace of Confucius. As an eminent engineering pipeline manufacturer, pipeline engineering service provider, and general contractor, our primary business encompasses four categories of specialized and custom pipelines: rainwater and sewage diversion pipelines, municipal area pipelines, industrial and mining area pipelines, and pipelines for national key engineering projects. We have cultivated a robust industrial ecosystem that includes design institutes, financial institutions, port logistics, construction units, and upstream and downstream enterprises. Our unwavering commitment is to evolve into a global leader in comprehensive pipeline system solutions, revolutionizing human life with intelligent pipelines and ensuring the enduring safety of pipeline transportation.
Donghong boasts an impressive team of over 200 R&D personnel and holds more than 100 patents. Leveraging esteemed national technology R&D platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, Donghong pioneers in advancing the digitization, informatization, and intelligence of pipeline engineering. By spearheading industry developments, we significantly contribute to national key strategic projects and vital public welfare projects including the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road, standardized farmland, urban and rural water supply integration, Liren gas, and centralized heat supply. Our dedication ensures robust support for national priorities and the crucial infrastructure of public livelihood.
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