Discover our innovative Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe-a triumph in steel-plastic composite engineering! This marvel of anti-corrosion technology is meticulously crafted using pre-treated steel as the foundation. The inner surface boasts a coating of fusion bonded epoxy powder, applied with precision after heating, while the outer surface is enveloped in a resilient layer of polyethylene powder. The result? A product that epitomizes durability 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: Customization options available to meet specific customer requirements.
1. Unmatched Corrosion Resistance
Our pipeline utilizes a sophisticated blend of polyethylene and epoxy resin, both renowned for their exceptional anti-corrosion properties. These advanced polymer materials act as a formidable shield against soil and fluid-induced deterioration, significantly extending the pipeline's durability and service life.
2. Remarkable Hydraulic Efficiency
Designed with a silkily smooth inner wall, our pipe excels in reducing scaling and features a minimal friction coefficient. This ensures optimal conveying capacity while simultaneously minimizing pressure loss and slashing energy consumption during water transmission.
3. Exceptional Hygiene Standards
The impeccable epoxy resin coating within the pipeline offers a pristine and non-scaling surface. It guarantees safety and hygiene, conforming to the GB/T17219 health standard, thus effectively preventing any contamination of water quality.
4. Outstanding Coating Adhesion
Through meticulous modification, epoxy resin and polyethylene powder establish a robust chemical bond with metals, ensuring extraordinary adhesion. The outer polyethylene layer delivers remarkable toughness and impact resistance, adeptly withstanding abrasions, root penetration, and ensuring prolonged durability.
5. Prolonged Service Life
Our anti-corrosion steel pipes boast an impressive lifespan of 30 to 50 years, under standard construction and usage conditions, representing a major enhancement over conventional steel pipes.
6. Reliable Connection Security
With versatile connection options such as flanged, quick coupling, butt welding, stainless steel lining, and socket connections, our pipes are engineered for reliability. Each connection is designed to meet diverse environmental and pressure requirements with proven dependability.
1. At Shandong Donghong Pipe Industry Co., Ltd., we believe that unparalleled quality is born from meticulous process design and precision manufacturing. Leveraging our cutting-edge equipment and decades of industry expertise, we ensure that every Heavy-Duty Spiral Welded Steel Pipe with Superior Cathodic Stripping Resistance meets the highest standards. Our commitment to excellence makes us a trusted partner for clients who demand reliability and durability.
In our quest to meet the rising need for large-diameter pipelines, Donghong proudly offers large-diameter anticorrosion steel pipes that adhere to the most stringent international standards. Our first-class products are designed to provide exceptional performance in even the most challenging conditions.
2. To cater to the diverse requirements of various projects, Donghong has engineered an array of innovative 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 many more. We pioneered the large-diameter socket flexible connection in the industry, with a maximum socket caliber of 1.8M. This breakthrough has been successfully implemented in key Chinese water conservancy projects, establishing us as pioneers and leaders in the field of large-diameter steel pipe socket connections in China.
Donghong's extensive facilities include a dedicated factory for large-diameter, high-pressure pipe fittings. This specialized factory not only produces robust pipe fittings for various projects but also offers customization services to meet specific client needs and project environments. Our versatility ensures that every project is equipped with the ideal 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 a beacon of innovation and excellence, proudly headquartered in the historic and culturally rich city of Qufu, China-the birthplace of Confucius. Established in 1997, Donghong stands as a premier manufacturer and visionary leader in the realm of engineering pipeline solutions. As a comprehensive pipeline engineering service provider and esteemed general contractor, Donghong specializes in crafting bespoke pipeline solutions across four pivotal categories: rainwater and sewage drainage, municipal infrastructure, industrial and mining applications, and pipelines for national key projects. Marking a significant milestone, on November 6, 2017, Donghong became the first engineering composite pipeline manufacturer to be listed on the main board in Shanghai, cementing its reputation as a trailblazer in the industry.
Donghong boasts a team of over 200 dedicated R&D professionals and holds an impressive portfolio of more than 100 innovative patents. Leveraging the prowess of national technology platforms such as the National Enterprise Technology Center, CNAS Laboratory, Academic Expert Workstation, and Postdoctoral Workstation, Donghong is at the forefront of pioneering advancements in digitalization, informatization, and intelligence within pipeline engineering. The company's commitment to cutting-edge research propels it to lead and shape the future of the engineering pipeline industry.
Renowned for its unwavering dedication to both national and community-oriented projects, Donghong actively contributes to pivotal national strategic and livelihood initiatives. Its influence spans across iconic projects like the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and the monumental One Belt, One Road initiative. Additionally, Donghong plays a crucial role in endeavors such as standardized farmland, the integration of urban and rural water supply, Liren gas, and centralized heating, reinforcing its position as a cornerstone in the national infrastructure landscape.
At Donghong, we pride ourselves on our unparalleled logistics excellence, honed through strategic partnerships with over five elite 5A-level logistics companies. With years of expertise in diverse transportation modes-be it the swift agility of automobile transport, the expansive reach of railway networks, or the global connectivity offered by port and shipping logistics-we guarantee premium service no matter the climate or destination. Whether navigating the scorching heat or braving the biting cold, and regardless of the remoteness or challenging nature of the location, our robust transportation strategy is meticulously designed to ensure your shipments arrive at their destination promptly and efficiently, every single time.
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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