1. Introducing our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe - a marvel of engineering! This steel-plastic composite product boasts exceptional anti-corrosion properties. Crafted from meticulously pre-treated steel pipe, it features an inner surface coated with fusion-bonded epoxy powder after heating, and an outer surface elegantly enveloped in polyethylene powder. A robust and reliable solution for all your pipeline needs.
2. Discover the pinnacle of innovation in the water conservancy pipeline industry with our product. This pipe sets the standard for excellence, offering a seamless blend of anti-corrosion performance between the pipe body and socket. Its flexible socket ensures a flawless combination of anti-corrosion features and convenience, making it the industry's top choice for both efficiency 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: Tailored to perfection, customizable to meet all customer requirements.
1. Corrosion Resistance
Our Bending Resistant API 5L Pipeline is crafted with premium anti-corrosion materials such as polyethylene and epoxy resin, both renowned for their exceptional corrosion resistance. These polymer materials are meticulously designed to shield the pipeline from soil and fluid damage, significantly extending the pipeline's service life and ensuring robust durability.
2. Excellent Hydraulic Properties
Featuring a smooth inner wall that resists scaling, our pipeline boasts a low coefficient of friction. This smooth, non-adhesive surface enhances the pipeline's conveying capacity, minimizes pressure loss, and reduces energy consumption for water transmission, ensuring efficient and reliable performance.
3. Superior Hygiene Performance
The epoxy resin coating on the interior of the pipeline offers a smooth, non-scaling surface that is both safe and hygienic. Complying with GB/T17219 health standards, the anti-corrosion material effectively prevents water quality contamination, ensuring clean and safe water delivery.
4. Exceptional Coating Adhesion
Utilizing modified epoxy resin and polyethylene powder, our pipeline forms strong chemical bonds with the metal, ensuring excellent adhesion. The outer polyethylene layer provides superb toughness and impact resistance, protecting against scratches from dragging and knocks, and even resisting plant root puncture.
5. Extended Lifespan
Designed for longevity, our anti-corrosion steel pipeline can perform reliably for 30 to 50 years under normal construction and usage conditions. This represents a significant improvement in lifespan compared to ordinary steel pipes, offering long-term value and reliability.
6. Superior Connection Security
Our pipeline offers diverse connection methods to suit various environments and pressure requirements. Options include flanged, quick coupling, butt welding, stainless steel lining, and socket connections. Each connection method is well-established, providing mature and reliable solutions for secure and dependable installations.
1. The final quality of any product is a testament to its process design and manufacturing precision. At Shandong Donghong Pipe Industry Co., Ltd., we leverage state-of-the-art equipment and decades of manufacturing expertise to ensure exceptional quality control throughout critical processes. Our commitment to excellence makes us a reliable partner, delivering high-quality products you can trust.
Recognizing the surging demand for large-diameter pipelines, Donghong proudly introduces our large-diameter anticorrosion steel pipes. Crafted to meet stringent international standards, these pipes promise unparalleled quality and durability, positioning us as leaders in the industry.
2. To cater to diverse project requirements, Donghong has innovatively developed multiple connection methods for large-diameter anticorrosive steel pipes. Our offerings include flexible socket connections, butt welding, socket lap welds, ball lap welds, customized bevel forms, and more. Pioneering the industry, we introduced the large-diameter socket flexible connection, with socket calibers up to 1.8M, first implemented in major Chinese water conservancy projects. We are proud to be trailblazers and leaders in large-diameter steel pipe socket connections in China.
At Donghong, we house a dedicated factory specializing in large-diameter, high-pressure pipe fittings. Our expertise not only covers standard production but also extends to bespoke solutions, tailored to meet specific customer requirements and unique project environments.
Explore Various 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 renowned city of Qufu, the hometown of Confucius, China. Founded in 1997, Donghong has established itself as a premier manufacturer of engineering pipelines, a pioneering pipeline engineering service provider, and a leading general contractor in the pipeline engineering sector. Our primary business encompasses four major categories of functional and bespoke pipelines: rainwater and sewage drainage pipes, municipal pipelines, industrial and 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.
Donghong boasts an impressive team of over 200 R&D personnel and holds more than 100 patents. Leveraging the resources of the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Postdoctoral Workstation, Donghong excels in the research of digitalization, informatization, and intelligence within pipeline engineering. We are at the forefront of industry development, setting new standards and advancing the engineering pipeline industry.
Donghong is a key player in national strategic and livelihood projects. We have made significant contributions to initiatives such as 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. By leading the development of the engineering pipeline industry, we continue to serve these vital national projects with unwavering dedication and excellence.
Donghong has established strategic partnerships with over five prestigious 5A-level logistics companies, leveraging years of unparalleled transportation experience. Our sophisticated network integrates automobile transportation, railway logistics, port handling, and maritime shipping. Whether facing heatwaves or icy conditions, remote locations or challenging environments, we guarantee exceptional service. Our comprehensive transportation strategy ensures that every shipment reaches your site swiftly and efficiently, embodying our commitment to excellence in delivery.
1. Is your product meets the international standard ?
Our products have passed CE, BV, ISO, and multiple other certifications, demonstrating superior quality and compliance with international standards. Please let us know the specific national standard you require, and we will verify or test accordingly.
2. What kind of service do you offer ?
As a leading manufacturer, we offer a wide range of services including the provision of high-quality pipe products, pipe fittings, and comprehensive packaging and shipping solutions. As a professional consulting company, we deliver expert project advice, innovative pipe system solutions, and design recommendations. Additionally, as an engineering-centric enterprise, we provide exemplary pipeline contracting services, pipe repair services, and free maintenance guidance.
3. Do you support OEM/ODM service?
Yes, we specialize in customization across various parameters such as material, specifications, logo, packaging, and connection methods. Our expert team is equipped to offer tailored solutions for your specific projects, with numerous successful case studies to our credit.
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 cordially invite all customers to visit our facility to inspect our products firsthand. We also conduct rigorous tests as per customer requirements prior to order confirmation. Additionally, we can dispatch samples before bulk production for customer testing and approval, ensuring the highest quality standards are met.
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