1. Introducing the cutting-edge Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe, a marvel of modern engineering. This steel-plastic composite pipe boasts unmatched anti-corrosion properties. Constructed from meticulously pre-treated steel pipes, it features an inner surface coated with fusion-bonded epoxy powder after heating, and an outer surface enveloped in durable polyethylene powder.
2. Renowned as the pinnacle of excellence in the water conservancy pipeline industry, this product exemplifies the ultimate in anti-corrosion performance. The pipe body and socket anti-corrosion layers seamlessly harmonize, providing consistent protection. The innovative flexible socket design ensures the perfect fusion of anti-corrosion attributes and ease of connection, making it the industry's most advanced and convenient solution.
| 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
Leveraging the outstanding properties of polyethylene and epoxy resin, our anti-corrosion materials provide exceptional resistance against various forms of corrosion. These advanced polymer materials effectively safeguard the pipeline from soil and fluid damage, significantly extending its service life.
2. Excellent hydraulic properties
The meticulously smooth inner wall ensures minimal scaling and a low friction coefficient. This seamless surface, with its non-adhesive attributes, guarantees optimal conveyance capacity, drastically reducing pressure loss and minimizing energy consumption during water transmission.
3. Good hygiene performance
Our epoxy resin coating provides a smooth and hygienic inner surface, effectively preventing scaling. This anti-corrosion material adheres to GB/T17219 health standards, ensuring safety and hygiene while preventing water quality contamination.
4. Superior adhesion of coating
Through careful modification, our epoxy resin and polyethylene powder create a robust chemical bond with metal surfaces, ensuring excellent adhesion. The outer polyethylene layer offers remarkable toughness and impact resistance, effectively countering scratches and punctures, even from plant roots.
5. Long life
Under normal construction and usage conditions, our anti-corrosion steel pipes boast an impressive lifespan of 30 to 50 years, a substantial enhancement over conventional steel pipes.
6. Good connection security
Our pipes offer versatile connection methods to suit various environments and pressure requirements. Options include flanged, quick coupling, butt welding, stainless steel lining, and socket connections, ensuring mature and reliable connectivity.
1. The exceptional quality of our Anti-Corrosion Coating Carbon Steel Pipe is a direct result of our meticulously designed processes and advanced manufacturing techniques. At Shandong Donghong Pipe Industry Co., Ltd., we utilize state-of-the-art equipment for precise control over key production stages, combined with our extensive experience, to deliver products of unparalleled quality. Our commitment to excellence has established us as a reliable and trusted enterprise.
Recognizing the increasing need for large-diameter pipelines, Donghong proudly introduces our large-diameter anticorrosion steel pipes, crafted to meet and exceed international standards. Our dedication to excellence ensures that we deliver first-class products that stand up to the most rigorous demands.
2. To cater to the diverse requirements of various projects, Donghong has innovatively developed multiple connection methods for our large-diameter anticorrosive steel pipes. These include flexible socket connections, butt welding, socket lap welds, ball lap welds, and customized bevel forms, among others. We pioneered the large-diameter socket flexible connection technology, achieving a maximum socket caliber of 1.8M, which has been successfully implemented in major water conservancy projects across China. Our leadership in large-diameter steel pipe socket connections has solidified our status as industry pioneers.
Donghong boasts a specialized factory dedicated to producing large-diameter, high-pressure pipe fittings tailored for specific project needs. Our capabilities extend to customizing special pipe fittings to match customer specifications and project environments, ensuring optimal performance and reliability.
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 and culturally rich city of Qufu, the hometown of Confucius in China. Established in 1997, Donghong has grown into a premier manufacturer specializing in engineering pipelines. As a comprehensive provider and general contractor for pipeline engineering services, Donghong offers 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. The company was proudly listed on the main board of Shanghai on November 6, 2017, marking its status as the first main board-listed engineering composite pipeline manufacturer in China.
With a robust team of over 200 R&D personnel and more than 100 patents, Donghong leads the way in innovation. Leveraging national platforms such as the enterprise technology center, CNAS laboratory, academicians' expert workstation, and postdoctoral workstation, the company is at the forefront of digital, informational, and intelligent advancements in pipeline engineering. This commitment to pioneering research and development ensures Donghong's leadership in the engineering pipeline industry.
Donghong has been pivotal in national key strategic projects and vital livelihood initiatives. The company has significantly contributed to major projects including the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road, standardized farmland, urban-rural water supply integration, Liren gas, and centralized heating projects. By leading the development of the engineering pipeline industry, Donghong continues to support and enhance essential infrastructure and community projects across the nation.
Donghong has forged elite partnerships with over five top-tier 5A-level logistics companies, boasting an extensive history of seamless transportation. Our multifaceted logistics network spans automobile, railway, port, and maritime shipping, ensuring exceptional service regardless of weather extremes or remote, challenging locations. Our robust transportation strategy guarantees that every shipment reaches your doorstep with unparalleled speed and precision.
1. Does your product meet international standards?
Our products have successfully passed CE, BV, ISO, and WARS certifications, and all performance metrics exceed the standard requirements. You can confidently inform us of any specific national standard you require; we will diligently check and test it for you.
2. What services do you offer?
As a manufacturing factory, we provide high-quality pipe products, pipe fittings, packaging, and shipping. As a professional consultation company, we offer project consulting advice, integrated pipe system solutions, and design suggestions. As an engineering-focused enterprise, we deliver pipeline contractor services, pipe repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely, we offer customization options in material, specifications, logo, packaging, connection methods, and more. Additionally, our expert team is ready to provide tailored solution suggestions for your specific projects, with numerous successful cases to our credit.
4. What are your payment terms?
We accept payment via T/T or L/C at sight.
5. How can you guarantee the quality of the goods you offer?
We warmly welcome all customers to visit our company and inspect our products firsthand. We also offer stringent testing as per customer requirements before order placement. Furthermore, before bulk production, we can dispatch samples for customers to conduct their own tests to ensure product quality.
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