1. Discover the exceptional Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe, a revolutionary steel-plastic composite marvel. Crafted using pre-treated steel pipe as the base, this product boasts unparalleled anti-corrosion attributes. The inner surface is meticulously coated with fusion-bonded epoxy powder, while the outer surface is enveloped in durable polyethylene powder, ensuring longevity and resilience.
2. Introducing the ultimate solution in the water conservancy pipeline sector. Our pipe's body and socket are enveloped in a consistent anti-corrosion layer, showcasing both flexibility and superior protection. The flexible socket seamlessly integrates with our top-tier anti-corrosion system, offering the industry's most advanced and convenient connection method.
| 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 available to meet specific customer needs.
1. Corrosion Resistance
Our pipelines utilize anti-corrosion materials such as polyethylene and epoxy resin, which are renowned for their superior corrosion resistance. These high-quality polymer materials effectively shield the pipeline from soil and fluid-induced damage, significantly extending its operational lifespan.
2. Excellent Hydraulic Properties
With a smooth inner wall that resists scaling and exhibits a low coefficient of friction, our pipelines ensure optimal flow efficiency. The non-adhesive surface not only maintains the pipeline's conveying capacity but also minimizes pressure loss and reduces water transmission energy consumption.
3. Superior Hygiene Performance
The epoxy resin coating inside our pipelines provides a smooth, scale-resistant surface that is both safe and hygienic. Complying with GB/T17219 health standards, our anti-corrosion materials prevent contamination, ensuring the purity of transported water.
4. Robust Coating Adhesion
Our modified epoxy resin and polyethylene powder form strong chemical bonds with metal, resulting in exceptional adhesion. The outer polyethylene layer is tough and impact-resistant, capable of withstanding scratches from dragging and knocks, as well as resisting punctures from plant roots.
5. Prolonged Lifespan
Designed for durability, our anti-corrosion steel pipes offer a remarkable service life of 30 to 50 years under typical construction and usage conditions, far surpassing the longevity of standard steel pipes.
6. Secure and Versatile Connections
Our pipelines feature a variety of connection methods to accommodate diverse environmental and pressure requirements. Options include flanged, quick coupling, butt welding, stainless steel lining, and socket connections. Each method ensures a mature, reliable, and secure connection.
1. The final quality level of the product is a direct result of meticulous process design and advanced manufacturing. At Donghong, we leverage state-of-the-art equipment and draw upon years of manufacturing expertise to ensure that each product we deliver is of the highest quality. This unwavering commitment allows us to provide our customers with reliable, top-tier products, solidifying our reputation as a trustworthy enterprise.
Recognizing the increasing demand for large-diameter pipelines, Donghong has introduced large-diameter anticorrosion steel pipes. These pipes are crafted to meet stringent international standards, ensuring that we provide first-class products that stand the test of time and rigorous conditions.
2. To cater to the diverse needs of various projects, Donghong has engineered multiple connection methods for large-diameter anticorrosive steel pipes. Options include flexible socket connections, butt welding, socket lap welds, ball lap welds, and customized bevel forms, among others. Notably, we pioneered the large-diameter socket flexible connection technology, achieving a maximum socket caliber of 1.8M. This innovation was first implemented in significant water conservancy projects in China, establishing us as leaders and pioneers in large-diameter steel pipe socket connections.
Donghong boasts a dedicated factory for large-diameter, high-pressure pipe fittings. This facility specializes in producing bespoke pipe fittings designed to meet the specific requirements of various projects. Our ability to customize fittings based on customer needs and project environments further underscores our commitment to delivering tailored solutions.
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 proudly headquartered in the historic hometown of Confucius - Qufu, China. Established in 1997, our company is a distinguished manufacturer of engineering pipelines, a premier pipeline service provider, and a reputable general contractor in pipeline engineering. Our diverse portfolio encompasses four major pipeline categories: rainwater and sewage drainage, municipal pipelines, industrial and mining pipelines, and specialized pipelines for national key projects. On November 6, 2017, Donghong achieved a significant milestone by being listed on the main board of Shanghai, marking a pivotal moment as the first engineering composite pipeline manufacturer in China to do so.
Donghong boasts a robust R&D team of over 200 experts and holds more than 100 patents. Leveraging prestigious platforms like the National Enterprise Technology Center, the National CNAS Laboratory, the Academician Expert Workstation, and the Postdoctoral Workstation, we pioneer advancements in the digitalization, informatization, and intelligence of pipeline engineering, spearheading the industry's evolution.
Our company plays a critical role in national key strategic and livelihood projects, exemplifying leadership in the engineering pipeline sector. We proudly serve monumental initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road projects, standardized farmland development, urban and rural water supply integration, Liren gas, centralized heating solutions, and more.
Donghong has proudly forged strategic alliances with over five elite 5A-level logistics companies, boasting extensive expertise in transportation. Leveraging a multifaceted approach that includes automobile, railway, port, and shipping logistics, we excel in delivering top-notch service regardless of extreme temperatures or challenging terrains. Our robust and comprehensive transportation strategy ensures that every shipment reaches your desired location with unmatched speed and efficiency.
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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