1. Inner epoxy resin outer polyethylene coated composite steel pipe is a premium steel-plastic composite product renowned for its exceptional anti-corrosion properties. It is meticulously crafted using pre-treated steel pipes as the base material. The inner surface is coated with high-performance fusion bonded epoxy powder, while the outer surface is protected by a robust layer of polyethylene powder. This dual-coating process ensures unparalleled durability and longevity.
2. This product stands as the pinnacle of innovation in the water conservancy pipeline industry. It features a consistent anti-corrosion layer on both the pipe body and socket, ensuring uniform protection. The flexible socket offers an impeccable blend with the anti-corrosion layer, representing the finest anti-corrosion solution in the industry. Additionally, it provides the most convenient and reliable connection method, making it the top choice for water pipeline applications.
| 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 specific customer requirements.
1. Corrosion Resistance
Our epoxy-coated steel pipes utilize anti-corrosion materials like polyethylene and epoxy resin, both renowned for their superior corrosion resistance. These polymer materials effectively shield the pipeline from soil and fluid damage, significantly extending its service life.
2. Excellent Hydraulic Properties
Featuring a smooth inner wall that resists scaling, our pipes boast a low coefficient of friction and non-adhesive properties. This ensures a robust conveying capacity while minimizing pressure loss and reducing energy consumption in water transmission.
3. Good Hygiene Performance
The epoxy resin coating inside the pipeline creates a smooth, scale-resistant surface that is both safe and hygienic. Adhering to the GB/T17219 health standard, it effectively prevents water contamination, ensuring the purity of the conveyed water.
4. Superior Adhesion of Coating
Our modified epoxy resin and polyethylene powder form a strong chemical bond with the metal, resulting in exceptional adhesion. The outer polyethylene layer combines toughness with impact resistance, protecting against scratches, drags, knocks, and even root punctures.
5. Long Life
Designed for durability, our anti-corrosion steel pipes can last between 30 to 50 years under normal construction and usage conditions, far outlasting ordinary steel pipes.
6. Good Connection Security
Offering a variety of connection methods to suit different environments and pressure requirements, our pipes can be flanged, quick-coupled, butt-welded, lined with stainless steel, socket-connected, and more. Each connection type is mature and reliable, ensuring secure installations.
1. The superior quality of our High Yield Epoxy Coated Steel Pipe is the result of meticulous process design and advanced manufacturing techniques. At Shandong Donghong Pipe Industry Co., Ltd., we leverage state-of-the-art equipment for critical process control, blending it seamlessly with years of manufacturing expertise. This ensures we deliver high-quality products that our customers can trust, establishing us as a reliable enterprise in the industry.
In response to the escalating demand for large-diameter pipelines, Shandong Donghong Pipe Industry Co., Ltd. proudly offers top-tier large-diameter anticorrosion steel pipes that adhere to international standards. Our products are engineered to meet the highest quality benchmarks, ensuring durability and excellence.
2. To cater to diverse project requirements, Shandong Donghong Pipe Industry Co., Ltd. has innovated various 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, with a maximum socket caliber of up to 1.8M. This innovation was first implemented in key water conservancy projects in China, positioning us as leaders and trailblazers in large-diameter steel pipe socket connections.
Shandong Donghong Pipe Industry Co., Ltd. operates a dedicated factory for large-diameter, high-pressure pipe fittings. We manufacture high-quality fittings tailored for specific projects and offer customization services to meet unique customer requirements and project conditions.
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 hometown of Confucius - Qufu, China. Established in 1997, Donghong stands as a premier manufacturer, service provider, and general contractor in engineering pipeline solutions. Our expansive product range includes rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and specialized pipelines for national key projects. A noteworthy milestone was achieved on November 6, 2017, when Donghong became the first composite pipeline manufacturer listed on the main board of Shanghai, marking a significant achievement in our industry.
With a robust team of over 200 R&D personnel and a portfolio exceeding 100 patents, Donghong is at the forefront of innovation. Our strong foundation is built on national technology research and development platforms such as the National Enterprise Technology Center, the National CNAS Laboratory, and dedicated academician and postdoctoral workstations. By pioneering digitalization, informatization, and intelligent pipeline engineering, Donghong continually leads advancements in the engineering pipeline sector.
Donghong is a key player in national strategic and livelihood projects, cementing its leadership in the engineering pipeline industry. Our expertise supports significant initiatives like the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road, standardized farmland, urban and rural water supply integration, Liren gas, and centralized heating projects, contributing to the nation's infrastructural and developmental goals.
Donghong has forged enduring strategic alliances with over five top-tier 5A-level logistics companies, bringing years of transportation expertise to the table. Leveraging a blend of automobile, railway, port, and shipping logistics, we ensure seamless delivery regardless of the weather or terrain, whether it be scorching heat, frigid cold, or remote and challenging locations. Our robust and integrated transportation strategy guarantees that every shipment reaches your doorstep promptly and efficiently.
1. Is your product meets the international standard ?
Our products have successfully passed rigorous certifications such as CE, BV, ISO, and WAR. All performance metrics exceed international standards. Please inform us of the specific national standards you require, and we will verify or test them accordingly.
2. What kind of service do you offer ?
As a leading manufacturing factory, we offer a comprehensive range of services including the production of pipe products, pipe fittings, packaging, and shipping. Our expertise extends to professional consultation, providing project advice, pipe system solutions, and design recommendations. Furthermore, as an engineering-centric enterprise, we excel in pipeline contracting, pipe repair services, and offer complimentary maintenance guidance.
3. Do you support OEM/ODM service?
Absolutely, we provide extensive customization options in material, specifications, logos, packaging, and connection methods. Our expert team can also offer tailored solutions for your specific projects, backed by a portfolio of successful cases.
4. What's your terms of payment?
We accept T/T or L/C at sight.
5. How can you gurantee the goods you offered is qualified?
We warmly invite all customers to visit our company and inspect our products firsthand. We can conduct stringent tests as per your requirements before finalizing any order. Additionally, we offer sample dispatch prior to bulk production, allowing you to independently verify the product quality.
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