1. The Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe is a state-of-the-art steel-plastic composite marvel with outstanding anti-corrosion properties. It is crafted from meticulously pre-treated steel pipes as the base. The inner surface is enhanced with meticulously applied fusion-bonded epoxy powder after precise heating, while the outer surface gleams with a robust polyethylene powder coating.
2. This is the pinnacle product in the water conservancy pipeline industry. The performance of the pipe body and socket anti-corrosion layer are harmoniously consistent. Featuring a flexible socket, it achieves a flawless blend of anti-corrosion excellence and the industry's most convenient connection methods. It embodies the best anti-corrosion technology available, offering unparalleled convenience and reliability.
| 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: Customized options are available to meet customer-specific requirements.
1. Exceptional Corrosion Resistance
Crafted from superior anti-corrosion materials, our epoxy-coated steel pipes employ polyethylene and epoxy resin, renowned for their remarkable corrosion resistance. This ensures robust protection against soil and fluid damage, significantly extending the pipeline's service life.
2. Superior Hydraulic Properties
The smooth inner wall design minimizes scaling and boasts a low coefficient of friction. Its slick surface ensures efficient conveyance capacity, reducing both pressure loss and energy consumption during water transmission.
3. Impeccable Hygiene Performance
The epoxy resin coating inside the pipeline offers a smooth, non-scaling surface that is both safe and hygienic. Complying with GB/T17219 health standards, it effectively prevents water contamination, maintaining high water quality.
4. High Adhesion Coating
Our advanced epoxy resin and polyethylene powder raw materials create a durable chemical bond with metal, ensuring strong adhesion. The external polyethylene layer adds robustness, impact resistance, and protection against dragging, knocking, and plant root punctures.
5. Extended Lifespan
Engineered for longevity, our anti-corrosion steel pipes boast a continuous use lifespan of 30 to 50 years under normal construction and operating conditions, far surpassing that of standard steel pipes.
6. Secure Connections
Offering a variety of connection methods to suit diverse environments and pressure requirements, our pipes are compatible with flanged, quick coupling, butt welding, stainless steel lining, and socket connections. These methods ensure mature and reliable connections.
1. The exceptional quality of our products is inherently tied to our meticulous process design and manufacturing protocols. At Donghong, we leverage advanced equipment and decades of expertise to ensure rigorous quality control at every critical stage. This unwavering commitment enables us to deliver superior products, solidifying our reputation as a trustworthy and dependable enterprise.
Recognizing the surge in demand for large-diameter pipelines, Donghong proudly presents our state-of-the-art large-diameter anticorrosion steel pipes. These first-rate products meet and exceed international standards, ensuring durability and excellence in every project.
2. To cater to the diverse requirements of various projects, Donghong has engineered multiple innovative connection methods for large diameter anticorrosive steel pipes. These include flexible socket connections, butt welding, socket lap welding, ball lap welding, and bespoke bevel forms, offering a wide array of options. Notably, we pioneered the large-diameter socket flexible connection, with a maximum socket caliber of up to 1.8M, which has been successfully implemented in key water conservancy projects across China. This innovation positions us as the vanguard in large-diameter steel pipe socket connections.
Donghong boasts a dedicated factory for large-diameter, high-pressure pipe fittings, ensuring top-tier production quality. We also offer tailored solutions, crafting specialized pipe fittings to meet the unique demands and environmental conditions of each project.
Other connection methods.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) is headquartered in the historic city of Qufu, the hometown of Confucius in China. Founded in 1997, Donghong is a premier manufacturer and service provider specializing in engineering pipelines. Our expertise spans four major categories: rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for crucial national projects. As a general contractor for pipeline engineering, we offer comprehensive solutions tailored to meet diverse needs. On November 6, 2017, Donghong achieved a significant milestone by being listed on the main board of Shanghai, becoming China's first engineering composite pipeline manufacturer to do so.
Donghong boasts a robust team of over 200 R&D professionals and holds more than 100 patents. Our innovation is driven by advanced platforms including the national enterprise technology center, national CNAS laboratory, academician expert workstation, and postdoctoral workstation. We are at the forefront of digitalization, informatization, and intelligent solutions in pipeline engineering, spearheading the industry's progress.
Committed to national key strategic and livelihood projects, Donghong has played a pivotal role in major initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and the One Belt, One Road initiative. Our projects also support standardized farmland development, urban and rural water supply integration, Liren gas, centralized heating, and many more essential infrastructural endeavors, driving the industry's growth and benefiting communities across the nation.
Donghong has built robust strategic partnerships with over five top-tier 5A-level logistics companies, backed by our extensive experience in transportation. Leveraging a combination of automobile, railway, port, and maritime logistics, we ensure seamless delivery regardless of extreme weather or remote locations. Our comprehensive transportation strategy is designed to guarantee that every shipment reaches your site promptly and efficiently, providing you with unparalleled service every step of the way.
1. Do your products meet international standards?
Our products have passed CE, BV, ISO, and WAR certificates. All figures indicate performance higher than the standard. Please let us know which national standard you require, and we will check or test it for you accordingly.
2. What types of services do you offer?
As a manufacturing factory, we provide pipe products, pipe fittings, packaging, and shipping. As a professional consulting company, we offer project consulting, pipe system solutions, and design suggestions. As an engineering-focused enterprise, we provide pipeline contractor services, pipe repair services, and free maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer customization in material, specifications, logos, packaging, connection methods, and more. Our professional team can provide solution suggestions for your specific projects, with successful case studies available.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How do you guarantee the quality of your products?
We warmly welcome all customers to visit our company and inspect our products firsthand. We can also perform strict tests as required by our customers before order confirmation. Additionally, before bulk production, we can dispatch samples for customer testing to ensure product qualification.
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