| 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 |
Our advanced 3PP coating technology is meticulously engineered to serve as a robust anti-corrosion solution, specifically designed for pipelines transporting higher temperature media. This premium coating excels in desert areas, where extreme surface temperatures and prolonged sunshine prevail. As a result, it has become the preferred choice for buried water, gas, and oil pipelines in such challenging environments.
Our state-of-the-art Epoxy & Plastic coated anti-corrosion steel pipes offer versatile anticorrosive solutions tailored to meet diverse working condition requirements. Ideal for a range of environments, including buried installations, trenchless traction, pipe jacking, and open-air applications, these innovative solutions ensure unparalleled durability and performance under various environmental conditions:
- Buried: Inner epoxy, outer PE | Inner epoxy, outer 3PE | Inner epoxy, outer 3PP | Inner & outer epoxy coated
- Pipe Jacking: Inner epoxy, outer 3PE | Inner epoxy, outer 3PP | Inner epoxy, outer double layer epoxy
- Trenchless traction: Inner epoxy, outer 3PE | Inner epoxy, outer 3PP | Inner epoxy, outer double layer epoxy
- Open-air application: Inner epoxy, outer anti-UV coated
Our Inner Epoxy Resin Outer Polyethylene Coating Composite Steel Pipes start with a meticulously pre-treated steel pipe base. These pipes are heated, then the inner surface is coated with fusion bonded epoxy powder, while the outer surface is covered with polyethylene powder. The result is a superior, corrosion-resistant steel-plastic composite product that delivers exceptional performance and reliability.
Our flexible cap and insert coated plastic steel pipe showcases an innovation in design. Built upon a foundation of premium-quality steel pipe, one end is carefully bevelled while the other is flared and then meticulously coated with plastic. This sophisticated assembly, featuring a T-shaped rubber ring akin to the spherical ink pipe, ensures a seamless connection with cap and insert. Retaining the inherent advantages of coated steel pipe, it simultaneously adopts the swift and reliable connection traits of ductile iron pipe's flexible socket and socket. Thus, this design harmoniously merges and amplifies the strengths of both systems.
| Clamp Connection |
Flange Connection |
Good compatibility, convenient connection
The dual-layer epoxy coating, both internally and externally, leverages an epoxy resin base, ensuring exceptional compatibility. Enhanced by a patented, solvent-free epoxy coating, it delivers superior compatibility alongside remarkable resistance to corrosion.
Good cathodic protection
Our double-layer epoxy coating seamlessly integrates with cathodic protection systems, ensuring it does not obstruct the cathodic protection, thereby offering unparalleled defense against corrosion.
Good flexibility and resistance to bending
Crafted from high molecular weight epoxy resin, the coating material boasts impressive flexibility and outstanding bending resistance, making it ideal for challenging applications.
Scratch Resistance
The exterior layer features a modified epoxy coating embedded with special scratch-resistant materials, offering superior protection against abrasions.
High Temperature Resistant
Our double-layer epoxy anti-corrosive steel pipe is engineered to endure temperatures up to 110ºC, making it suitable for high-temperature applications.
1. The caliber range is DN50 ~ DN3600, with each pipe measuring 6 - 16m in length.
2. We operate two advanced powder coating production lines and 12 twin-screw extruders, offering comprehensive capabilities in powder coating and polyethylene material modification R&D.
3. As a leading manufacturer in the powder anti-corrosion process, we offer an extensive variety of methods including suction coating, spraying, rolling coating, and dip coating.
4. We are the sole enterprise in the nation integrating large-caliber steel pipe production, anti-corrosion processing, and anti-corrosion materials manufacturing under one roof.
5. Ensuring unparalleled safety and reliability, our socket-type anti-corrosion steel pipes set the benchmark in the industry.
| 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, pipeline engineering service provider, and general contractor, we offer four main categories of functional and customized pipelines: specialized pipelines for rainwater and sewage diversion, municipal areas, industrial and mining areas, and national key engineering projects. Our industrial ecosystem thrives through collaboration with design institutes, financial institutions, port logistics, construction units, and various upstream and downstream enterprises. We are dedicated to becoming a globally leading comprehensive pipeline system solution provider, using intelligent pipeline technology to enhance human life and ensure the safety of pipeline transportation.
Donghong boasts a team of over 200 R&D personnel and holds more than 100 patents. Leveraging national technology platforms such as the National Enterprise Technology Center, CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, we advance research in the digitalization, informatization, and intelligence of pipeline engineering, steering the industry's development. Our efforts support national strategic projects and public welfare initiatives 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. Donghong remains committed to contributing to these critical endeavors.
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