1. Inner epoxy resin outer polyethylene coated composite steel pipe: This state-of-the-art steel-plastic composite pipe offers superior anti-corrosion properties. Meticulously crafted from pre-treated steel, the inner surface is coated with fusion-bonded epoxy powder post-heating, while the outer surface is protected by a polyethylene powder coating, ensuring unparalleled durability and longevity.
2. The ultimate solution in the water conservancy pipeline industry: Our product features a pipe body and socket anti-corrosion layer designed for perfect consistency. The flexible socket seamlessly integrates with the anti-corrosion layer, providing not only the industry's best anti-corrosion mechanism but also the most convenient connection method. This makes it the ideal choice for long-term reliability and ease of installation.
| 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 the unique requirements of our customers.
1. Corrosion Resistance
Crafted with high-performance anti-corrosion materials such as polyethylene and epoxy resin, our pipelines boast exceptional resistance to corrosion. These advanced polymer materials effectively shield the pipeline from soil and fluid damage, significantly extending its service life.
2. Exceptional Hydraulic Properties
Featuring an ultra-smooth inner wall, our pipelines minimize scale formation and possess a low friction coefficient. The non-adhesive surface ensures robust conveyance capacity while reducing pressure loss and minimizing energy consumption during water transmission.
3. Superior Hygiene Performance
The epoxy resin coating on the inner surface of our pipelines is smooth and resistant to scaling, ensuring it remains safe and hygienic. Complying with GB/T17219 health standards, this anti-corrosion material effectively prevents water quality contamination.
4. Outstanding Coating Adhesion
Engineered for excellence, the epoxy resin and modified polyethylene powder form a robust chemical bond with the metal, ensuring strong adhesion. The outer polyethylene layer offers remarkable toughness and impact resistance, effectively withstanding scratches, plant root punctures, and the rigors of dragging and knocking.
5. Extended Lifespan
Our anti-corrosion steel pipes are designed for durability, providing a continuous service life of 30 to 50 years under standard construction and usage conditions, significantly outlasting ordinary steel pipes.
6. Reliable Connection Security
Versatile connection methods are available to meet diverse environmental and pressure requirements. These include flanged, quick coupling, butt welding, stainless steel lining, and socket connections. Each connection type is designed for maturity and reliability.
1. The final quality level of the product depends on the process design and manufacturing process. At Shandong Donghong Pipe Industry Co., Ltd., we leverage sophisticated equipment for critical process control and integrate years of manufacturing expertise. This ensures we deliver exceptional, high-quality products, making us a trustworthy and reliable enterprise.
In response to the growing demand for large-diameter pipelines, Donghong has introduced large-diameter anti-corrosion steel pipes. We adhere strictly to international standards, providing first-class products that meet global benchmarks.
2. To accommodate diverse project needs, Donghong has developed a variety of connection methods for large-diameter anti-corrosion steel pipes. These include flexible socket connections, butt welding, socket lap welding, ball lap welding, customized bevel forms, and other innovative connection forms. Notably, we pioneered the large-diameter socket flexible connection, achieving a maximum socket diameter of 1.8M. This breakthrough was first utilized in key water conservancy projects in China, establishing us as leaders and pioneers in large-diameter steel pipe socket connections.
Donghong boasts a state-of-the-art factory specializing in large-diameter, high-pressure pipe fittings. We produce high-quality pipe fittings for various projects and offer customization to meet specific customer requirements and project environments.
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 illustrious hometown of Confucius - Qufu, China. Founded in 1997, Donghong has steadily grown to become a premier manufacturer of engineering pipelines, as well as a leading pipeline engineering service provider and general contractor. Specializing in four major categories of functional and customized pipelines-rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects-our business spans critical infrastructure needs. Notably, on November 6, 2017, Donghong proudly became the first engineering composite pipeline manufacturer to be listed on the main board of Shanghai, solidifying our position as an industry pioneer.
Boasting a remarkable team of over 200 R&D personnel and holding more than 100 patents, Donghong is at the forefront of technological innovation. Our efforts are supported by esteemed national technology research and development platforms, including the national enterprise technology center, national CNAS laboratory, academician expert workstation, and postdoctoral workstation. Through these platforms, we are advancing the research and application of digitalization, informatization, and intelligence in pipeline engineering, driving the industry forward.
Donghong is instrumental in numerous national key strategic and livelihood projects. Our expertise supports major initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and the One Belt, One Road initiative. We are also pivotal in efforts like standardized farmland development, urban and rural water supply integration, Liren gas distribution, and centralized heating. As a leader in the engineering pipeline industry, we are committed to serving and enhancing these critical projects, contributing to the nation's progress and the well-being of its people.
Donghong has established strategic partnerships with more than five prestigious 5A-level logistics companies, leveraging our extensive transportation expertise. Whether by road, rail, or sea, our integrated logistics solutions ensure seamless deliveries, regardless of weather conditions or remote locations. Our robust transportation strategy guarantees that every shipment arrives at the customer's site promptly, fulfilling our commitment to unparalleled service excellence.
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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