Introducing our innovative Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe, a marvel of modern engineering and durability. This advanced steel-plastic composite product offers exceptional anti-corrosion features, meticulously crafted using pre-treated steel pipes as the foundation. The inner surface of each pipe is enhanced with a fusion-bonded epoxy powder coating, applied after precise heating, ensuring unrivaled resistance to corrosion. Meanwhile, the outer surface is shielded by a robust layer of polyethylene powder coating, fortifying the pipe against external elements. This harmonious blend of materials results in a product that stands the test of time, withstanding harsh environments while maintaining integrity and performance.
| 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: Our products are tailored to perfection and can be customized to meet the unique demands and specifications of our esteemed customers. Your needs drive our innovation.
1. Corrosion Resistance
Utilizing premium anti-corrosion materials like polyethylene and epoxy resin, our pipes offer unparalleled corrosion resistance. These advanced polymer materials effectively shield against soil and fluid damage, significantly extending the pipeline's service life.
2. Exceptional Hydraulic Properties
The smooth inner wall of our pipes is designed to minimize scaling and maintain a low coefficient of friction. This ensures excellent conveying capacity while reducing pressure loss and water transmission energy consumption.
3. Superior Hygiene Performance
Featuring a sleek epoxy resin coating within, our pipes are hygienically safe and resistant to scaling. They meet the GB/T17219 health standard, ensuring water quality remains uncontaminated.
4. Outstanding Adhesion of Coating
Our modified epoxy resin and polyethylene powder create strong chemical bonds with metal, ensuring exceptional adhesion. The outer polyethylene layer boasts remarkable toughness and impact resistance, defending against scratches, drag marks, and plant root penetration.
5. Extended Longevity
These anti-corrosion steel pipes are engineered to last between 30 to 50 years under standard construction and usage conditions, markedly surpassing the lifespan of ordinary steel pipes.
6. Secure and Reliable Connections
Our pipes support a variety of connection methods tailored for various environments and pressure requirements. Options include flanging, quick coupling, butt welding, stainless steel lining, and socket connections, all ensuring mature and reliable assemblies.
1. The pinnacle of product excellence is intricately tied to the process design and manufacturing precision. At Donghong, we leverage state-of-the-art equipment to meticulously oversee every critical phase of quality control. Combined with our years of seasoned manufacturing experience, we deliver products of unparalleled quality, establishing ourselves as a trustworthy enterprise you can rely on.
Recognizing the burgeoning need for robust solutions, Donghong has expanded its offerings by incorporating large-diameter anticorrosion steel pipes, ensuring our products set benchmarks against global standards, delivering nothing short of first-class quality.
2. To cater to diverse project requisites, Donghong has innovatively developed a wide array of connection methods for large-diameter anticorrosive steel pipes. These methods include flexible socket connections, butt welding, socket lap welds, ball lap welds, and custom bevel forms, offering projects a versatile choice. As pioneers, we introduced the large-diameter socket flexible connection, with a maximum socket caliber reaching an impressive 1.8M. This innovation was first implemented in pivotal water conservancy projects across China, establishing Donghong as the vanguard in large-diameter steel pipe socket connection technology.
Donghong boasts a dedicated factory for large-diameter, high-pressure pipe fittings, expertly crafting fittings tailored for diverse projects. We also provide bespoke solutions, customizing special pipe fittings to perfectly align with unique customer requirements and specific project environments.
Exploring diverse connection methods.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.), fondly abbreviated as Donghong, with the distinctive stock code 603856, is prominently situated in the historic and cultural heartland of Qufu, China - the revered birthplace of Confucius. Established in 1997, this trailblazing organization has emerged as a key player in the sphere of engineering pipeline manufacturing and services. Donghong stands as a trusted general contractor, offering an extensive spectrum of functional and tailor-made pipelines. These include rainwater and sewage drainage solutions, municipal pipelines, industrial and mining conduits, as well as pipelines serving national key projects. A momentous milestone in Donghong's illustrious journey was achieved on November 6, 2017, when it proudly became the first engineering composite pipeline manufacturer to be listed on the main board in Shanghai, marking a significant leap in its commitment to excellence and innovation.
With a dynamic innovation force comprising over 200 R&D experts and holders of more than 100 pioneering patents, Donghong is at the forefront of technological advancement. By leveraging prestigious national technology platforms, including the esteemed national enterprise technology center, CNAS laboratory, and academician expert workstation, as well as a dedicated postdoctoral workstation, Donghong is fervently pioneering the integration of digitalization, informatization, and intelligence within pipeline engineering. This unwavering dedication positions Donghong as a vanguard in propelling the engineering pipeline industry towards a future rich in technological evolution.
A beacon in the realm of national strategic initiatives, Donghong is profoundly committed to serving projects of paramount importance and societal benefit. Spearheading growth in the engineering pipeline sector, Donghong is pivotal in monumental projects such as the South-to-North Water Diversion and Hanjinwei. It also plays a crucial role in infrastructure endeavors like the Beijing-Xinjiang Expressway and the ambitious One Belt, One Road initiative. Furthermore, Donghong supports transformative undertakings like the development of standardized farmland, integrating urban and rural water supply systems, the Liren gas project, and centralized heating solutions. This unwavering dedication ensures that Donghong not only meets but surpasses the expectations set by national developmental agendas.
At Shandong Donghong Pipe Industry Co., Ltd., we've forged powerful alliances with over five elite 5A-level logistics companies, ensuring unparalleled transportation expertise and reliability. Leveraging our extensive experience in automobile, railway, port, and shipping logistics, we guarantee seamless delivery, regardless of weather extremes or challenging, remote destinations. Our meticulously crafted transportation strategy is designed to swiftly and securely transport every shipment, ensuring it reaches your site promptly with unmatched precision and care.
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.
Audited Supplier 
){kind=link}