Experience the superior protection of our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe. This cutting-edge steel-plastic composite marvel combines the strength of a pre-treated steel pipe foundation with exceptional anti-corrosion capabilities. The inner surface boasts a fusion-bonded epoxy powder coating applied after precise heating, while the outer surface features a resilient polyethylene powder finish. Embrace the future of robust and enduring piping solutions that stand the test of time.
| 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≤4000 |
>0.45 |
>1.5 |
>1.8 |
Note: Customization is available to meet your specific requirements and preferences.
1. Corrosion Resistance
Our state-of-the-art polyethylene and epoxy resin materials are at the forefront of corrosion resistance. These exceptional polymer materials provide an outstanding shield against soil and fluid damage, significantly prolonging the lifespan of the pipeline, ensuring durability and reliability.
2. Excellent Hydraulic Properties
The pipe's flawlessly smooth inner wall minimizes scaling and boasts a remarkably low coefficient of friction, guaranteeing efficient capacity for fluid conveyance. This ensures reduced pressure loss, optimizing water transmission and minimizing energy consumption.
3. Good Hygiene Performance
The interior epoxy resin coating is precision-engineered for smoothness and hygiene. Its non-scaling properties comply with the GB/T17219 health standard, safeguarding water quality by effectively preventing contamination from the pipeline.
4. Superior Adhesion of Coating
Through advanced modification, our epoxy resin and polyethylene raw materials form a robust chemical bond with the metal surface, delivering powerful adhesion. The exterior polyethylene layer provides exceptional toughness and impact resistance, defending against scratches and plant root punctures.
5. Long Life
Designed for longevity, these anti-corrosion steel pipes are engineered to last 30 to 50 years under normal use and construction conditions, marking a substantial improvement over standard steel pipes.
6. Good Connection Security
Versatile connection methods cater to diverse environmental and pressure requirements. Options such as flanging, quick coupling, butt welding, stainless steel lining, and socket connections are available, providing mature, secure, and reliable solutions.
1. The final quality excellence of our products hinges on an intricate process design and meticulous manufacturing methods. At Donghong, we employ state-of-the-art equipment to ensure superior quality control at every critical stage. Leveraging years of industry-leading manufacturing experience, we are dedicated to delivering products of exceptional quality, earning the trust and confidence of our valued customers.
Acknowledging the escalating demand for large-diameter pipelines, Donghong proudly introduces our large-diameter anticorrosion steel pipes. Built to meet and exceed international standards, we offer premium quality solutions designed for robust performance in demanding environments.
2. To cater to the diverse requirements of various projects, Donghong has pioneered the development of innovative connection methods for large-diameter anticorrosive steel pipes. Our offerings include flexible socket connections, precise butt welding, socket lap welds, ball lap welds, customized bevel forms, and other connection systems, providing a plethora of choices to fit any project need. We are industry trailblazers, having developed the first large-diameter socket flexible connection, with socket calibers reaching an impressive 1.8 meters. This innovation has been successfully implemented in China's key water conservancy projects, solidifying our position as the leaders and pioneers in large-diameter steel pipe socket connections.
Donghong boasts a specialized factory for the production of large-diameter, high-pressure pipe fittings. We offer tailored solutions, crafting bespoke pipe fittings to meet the specific requirements of our clients and adapt to any project environment.
Additional connection methods available.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.), proudly headquartered in the historical and culturally rich city of Qufu, known as the hometown of Confucius, stands as a monumental figure in the engineering pipeline industry. Established in 1997, this dynamic company, with its stock code 603856, has carved a niche as a premier manufacturer and service provider. Specializing in a diverse range of pipelines, Donghong excels in the engineering, customization, and management of rainwater and sewage drainage systems, municipal pipelines, industrial and mining conduits, and vital national project pipelines. As a trailblazer, Donghong etched its name in history on November 6, 2017, by becoming the first main board-listed engineering composite pipeline manufacturer in China, listed on the main board of Shanghai.
With an impressive cadre of over 200 dedicated R&D personnel and a rich portfolio of over 100 patents, Donghong is at the forefront of innovation. The company leverages prestigious national platforms, including a national enterprise technology center, CNAS laboratory, and esteemed academicians' expert and postdoctoral workstations, to pioneer advancements in the digitalization and intelligence of pipeline engineering. This commitment not only propels Donghong to lead the engineering pipeline industry but also sets new benchmarks in technological excellence.
Donghong is a cornerstone in national key strategic and livelihood projects, consistently pushing the envelope of the engineering pipeline sector. The company's visionary approach supports monumental projects such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and the ambitious One Belt, One Road initiative. Further contributions to standardized farmland, urban-rural water supply integration, Liren gas, and centralized heating projects underscore its pivotal role in shaping infrastructural progress and improving lives across China.
At Donghong, we've meticulously crafted a robust logistics network through strategic alliances with over five elite 5A-level logistics giants. With decades of seasoned transportation expertise, we seamlessly integrate automobile, railway, port, and shipping logistics. Regardless of extreme heat or biting cold, and even in the most remote or challenging terrains, our commitment to delivering unparalleled service remains unwavering. Our holistic transportation strategy is designed to guarantee that every shipment reaches your doorstep with speed and precision, ensuring our products are always at your service when you need them most.
1. Is your product meets the international standard ?
Our products have pass CE, BV, ISO and wars certificate, and all figures indicates higher than standard, you can feel free to let us know which national standard you required, we will check or test it for you.
2. What kind of service do you offer ?
As a manufacture fatory, we provide pipe products, pipe fittings, package and shipping; as a professional consulation company we provide project consulting advise, pipe system solutions and design suggestions; as an engineering focused enterprise , we also provide pipeline contractor service and pipe repair service, also can give free maintance guidance.
3. Do you support OEM/ODM service?
Yes, we offer customization in material, specification, logo, package , connection methods andothers. Meanwhile, our professional team can offer solution suggestion for your specified projects, we have successfull cases of that service.
4. What's your terms of payment?
T/T or L/C at sight.
5. How can you gurantee the goods you offered is qualified?
We warmly welcome all customers arrange the visit to our company and see our goods in sight, we can also provide strict test as per customer required before order. Meanwhile, before the bulk production, we can dispatch samples for customer to do their own tests to qualify the products.
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