1. Our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe is an advanced steel-plastic composite marvel. Engineered with precision, this product features a pre-treated steel pipe base, meticulously coated with fusion-bonded epoxy powder on its inner surface, and a durable polyethylene powder coating on its outer surface. This sophisticated design ensures superior anti-corrosion properties, making it an ideal choice for demanding applications.
2. The pinnacle of innovation in the water conservancy pipeline industry, our product boasts unmatched performance. The pipe body and socket anti-corrosion layer are harmoniously consistent, providing a flexible socket with an impeccable blend of strength and anti-corrosion capabilities. This represents the industry's most effective anti-corrosion method, coupled with the utmost convenience in connectivity, setting a new standard of excellence.
| 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 requirements.
1. Corrosion Resistance
Crafted using premium anti-corrosion materials like polyethylene and epoxy resin, these advanced polymer substances exhibit outstanding resistance to corrosion. This exceptional durability shields the pipeline from soil and fluid damage, considerably extending its service life.
2. Excellent Hydraulic Properties
Featuring a smooth inner wall that resists scaling, this pipeline boasts a low coefficient of friction and non-adhesive properties. These attributes maximize the pipeline's conveying capacity, reducing pressure loss and minimizing water transmission energy consumption.
3. Superior Hygiene Performance
The epoxy resin coating's polished surface inside the pipeline is not only resistant to scaling but also safe and hygienic. Compliant with the GB/T17219 health standard, this anti-corrosion material effectively prevents contamination, ensuring the purity of water quality.
4. Exceptional Coating Adhesion
Modified epoxy resin and polyethylene powder form a robust chemical bond with the metal, ensuring strong adhesion. The outer polyethylene layer's toughness and impact resistance guard against scratches, dragging impacts, and plant root punctures.
5. Extended Longevity
Designed to endure, anti-corrosion steel pipes can function optimally for 30 to 50 years under normal construction and usage conditions, significantly outlasting ordinary steel pipes.
6. Secure Connection Methods
Offering various connection options to suit different environments and pressure demands, these pipes can be connected via flanges, quick couplings, butt welding, stainless steel lining, and socket connections. Each method guarantees reliable and secure connections.
1. The ultimate quality of our products hinges on meticulous process design and manufacturing excellence. At Donghong, our sophisticated equipment ensures key process control, integrating years of manufacturing expertise to deliver unparalleled quality. Trust in Donghong for reliable, top-tier products.
In response to the surging demand for large-diameter pipelines, Donghong proudly introduces our large-diameter anticorrosion steel pipes, adhering to the highest international standards to deliver superior products.
2. To cater to the diverse requirements of various projects, Donghong has innovated multiple connection methods for large-diameter anticorrosive steel pipes. Options include flexible socket connection, butt welding, socket lap weld, ball lap weld, customized bevel forms, and more. We pioneered the large-diameter socket flexible connection with a maximum caliber of 1.8M, first utilized in crucial water conservancy projects in China. Donghong stands as the trailblazer and leader in large-diameter steel pipe socket connections.
Donghong boasts a cutting-edge factory dedicated to producing large-diameter, high-pressure pipe fittings. These fittings are crafted for major projects, with customization options available 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 historic city of Qufu, China, the birthplace of Confucius. Established in 1997, Donghong has grown into a premier manufacturer of engineering pipelines, offering comprehensive pipeline engineering services and serving as a general contractor for major pipeline projects. Our core business encompasses four primary categories of functional and customized 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 listed on the main board of the Shanghai Stock Exchange.
Donghong boasts a team of over 200 dedicated R&D professionals and holds more than 100 patents. Leveraging national technology platforms such as the National Enterprise Technology Center, the CNAS National Laboratory, the Academician Expert Workstation, and the Postdoctoral Workstation, Donghong is at the forefront of digitalization, informatization, and intelligent pipeline engineering research, pioneering advancements in the engineering pipeline sector.
Committed to national key strategic initiatives and essential livelihood projects, Donghong has played a pivotal role in numerous high-profile projects. These include the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road initiative, standardized farmland development, urban-rural water supply integration, Liren gas projects, and centralized heating schemes. Donghong continues to lead and innovate in the engineering pipeline industry, contributing to the nation's infrastructure and development.
Donghong has established strategic partnerships with over five 5A-level logistics companies, boasting vast experience in transportation. Leveraging a comprehensive network that includes automobile, railway, port, and shipping logistics, we ensure seamless delivery regardless of the climate or location. Whether the destination is remote or conditions are harsh, we guarantee top-tier service. Our integrated transportation strategy is designed to ensure that every shipment reaches the customer site with unparalleled efficiency and speed.
1. Is your product meets the international standard ?
Our products have passed CE, BV, ISO, and WARS certifications, consistently surpassing standard requirements. We welcome your specific national standard inquiries and will gladly verify or test our products to meet your needs.
2. What kind of service do you offer ?
As a manufacturing factory, we offer a comprehensive range of pipe products, fittings, packaging, and shipping services. As a specialized consultancy, we provide expert project advice, pipe system solutions, and design recommendations. Additionally, as an engineering-driven enterprise, we extend pipeline contracting, pipe repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM service?
Yes, we provide extensive customization options in material, specifications, logos, packaging, and connection methods. Our experienced team can also offer tailored solutions for your specific projects, backed by a successful track record in this 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 invite all customers to visit our facilities and inspect our products firsthand. We can also conduct rigorous testing as per customer requests before order placement. Additionally, we provide samples before bulk production for customers to perform their own quality assessments.
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