Experience the future of pipeline solutions with our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe. This innovative steel-plastic composite marvel is expertly crafted with superior anti-corrosion capabilities, using a meticulously pre-treated steel pipe as the foundation. Our cutting-edge process involves the application of a high-performance fusion-bonded epoxy powder coating on the inner surface followed by an advanced polyethylene powder coating on the outer surface, ensuring unmatched protection and durability.
| 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: Tailored customization available to perfectly meet your unique requirements.
1. Corrosion Resistance
Crafted with cutting-edge anti-corrosion materials such as polyethylene and epoxy resin, these polymers boast exceptional corrosion resistance. They act as formidable shields against soil and fluid damage, significantly extending the pipeline's service life by safeguarding it from environmental elements.
2. Excellent Hydraulic Properties
Our pipes feature an impeccably smooth inner wall that resists scaling and offers a low friction coefficient. This smooth and non-adhesive surface not only ensures optimal conveying capacity but also minimizes pressure loss and reduces energy consumption during water transmission.
3. Good Hygiene Performance
The epoxy resin coating inside the pipeline provides a sleek, scale-resistant, and hygienic surface. Compliant with GB/T17219 health standards, it prevents contamination, ensuring safe water quality through its robust anticorrosion properties.
4. Superior Adhesion of Coating
With expertly modified epoxy resin and polyethylene powder materials, the coating forms a potent chemical bond with the metal surface, ensuring exceptional adhesion. The sturdy outer polyethylene layer offers remarkable toughness and impact resistance, adeptly withstanding scratches and plant root penetration.
5. Long Life
Under normal conditions, our anti-corrosion steel pipes demonstrate impressive longevity, with a lifespan extending from 30 to 50 years, markedly surpassing that of ordinary steel pipes.
6. Good Connection Security
Designed to accommodate diverse environments and pressure needs, our pipes offer a variety of secure connection methods, including flanged, quick coupling, butt welding, stainless steel lining, and socket connections. Each method is established and dependable, ensuring robust pipeline security.
1. At Shandong Donghong Pipe Industry Co., Ltd., we understand that the final quality level of any product is intricately tied to the process design and manufacturing excellence. With our state-of-the-art equipment, we meticulously control key processes, leveraging years of manufacturing expertise to deliver top-tier products. Our unwavering commitment to quality makes us a trustworthy enterprise.
Capitalizing on the surging need for large-diameter pipelines, Donghong proudly introduces our large-diameter anticorrosion steel pipes. These pipes meet stringent international standards, ensuring first-class quality and exceptional performance.
2. To cater to diverse project requirements, Donghong has innovatively developed a variety of connection methods for our large diameter anticorrosive steel pipes. Options include flexible socket connections, butt welding, socket lap welds, ball lap welds, and customizable bevel forms, among others. As pioneers, we are the first in the industry to develop large-diameter socket flexible connections-capable of reaching a maximum socket caliber of 1.8M-and have been successfully utilized in China's key water conservancy projects, establishing us as leaders in large-diameter steel pipe socket connections.
Our high-capacity factory specializes in producing large-diameter, high-pressure pipe fittings tailored for demanding projects. At Donghong, we also offer customization services, creating specialized pipe fittings that align with unique customer requirements and specific project environments.
Other connection methods.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) is a prestigious name in the engineering pipeline sector, headquartered in the historic city of Qufu, China - the birthplace of Confucius. Established in 1997, our company, also recognized by the stock code: 603856, is a forerunner in engineering pipeline manufacturing and service provision. We offer a comprehensive range of services as a general contractor, specializing in rainwater and sewage drainage, municipal, industrial, mining pipelines, and pipelines for national key projects. On November 6, 2017, Donghong proudly became the first engineering composite pipeline manufacturer to be listed on the main board of Shanghai, setting a benchmark in the industry.
With a formidable team of over 200 R&D experts and more than 100 groundbreaking patents, Donghong is at the forefront of innovation. Our endeavors are supported by distinguished national platforms, including the National Enterprise Technology Center, CNAS laboratory, and advanced academician and postdoctoral workstations. We are pioneering the digital, informational, and intelligent transformation of pipeline engineering to lead the industry into the future.
Donghong is a trusted partner in advancing national key strategic and livelihood projects, contributing decisively to monumental initiatives like the South-to-North Water Diversion, Hanjinwei, and the Beijing-Xinjiang Expressway. We are proud to support the One Belt One Road initiative, standardized farmland development, urban-rural water supply integration, Liren gas projects, and centralized heating systems, reinforcing our commitment to progress and innovation in engineering pipeline solutions.
At Donghong, we have forged strong strategic alliances with over five elite 5A-level logistics companies, ensuring unparalleled transportation expertise. With years of experience under our belt, we seamlessly integrate automobile, railway, port, and shipping logistics to meet your needs. Whether under scorching heat or chilling cold, in remote areas or challenging terrains, we are committed to delivering exceptional service. Our robust and all-encompassing transportation strategy guarantees that every shipment reaches your doorstep promptly, ensuring customer satisfaction at its highest level.
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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