Introducing our premium Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe-a superior steel-plastic composite marvel expertly crafted for superior anti-corrosion performance. This innovative solution utilizes a meticulously pre-treated steel pipe as the foundational base, upon which we apply a fusion bonded epoxy powder coating to the inner surface after precise heating. To complete the ultimate protection, the outer surface is elegantly covered with a durable polyethylene powder coating, offering unmatched resilience and longevity.
| 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: This exceptional product can be tailored to meet specific customer requirements, ensuring bespoke solutions for your unique needs.
1. Corrosion Resistance
Our Spiral Welded Steel Pipe boasts the superior corrosion resistance of advanced polymer materials like polyethylene and epoxy resin, which are renowned for their exceptional ability to shield against corrosive elements. This impressive feature effectively safeguards the pipeline from the detrimental effects of soil and fluid, significantly extending its operational lifespan.
2. Excellent Hydraulic Properties
Designed with a smooth inner wall, our pipe minimizes scaling and sports a low friction coefficient. Coupled with its non-adhesive properties, this ensures optimal conveyance capacity, while simultaneously reducing both pressure loss and energy consumption during water transmission.
3. Good Hygiene Performance
The internal epoxy resin coating of the pipeline is impeccably smooth and resistant to scaling, ensuring a safe and hygienic environment. It complies with the stringent GB/T17219 health standards, thereby effectively preventing any contamination of water quality.
4. Superior Adhesion of Coating
The modified epoxy resin and polyethylene powder forge a robust chemical bond with the metal, offering exceptional adhesion. The outer polyethylene layer is remarkably tough and impact-resistant, adeptly withstanding scratches, knocks, and even plant root punctures.
5. Long Life
Engineered for durability, our anti-corrosion steel pipe promises a prolonged service life of 30 to 50 years under normal construction and usage conditions, marking a substantial enhancement over standard steel pipes.
6. Good Connection Security
Our pipes offer a versatile range of connection methods tailored to diverse environments and pressure requirements. With mature and reliable connections such as flanged, quick coupling, butt welding, stainless steel lining, and socket connections, they ensure unwavering security and adaptability.
1. The exceptional quality of our Spiral Welded Steel Pipe with High Cathodic Stripping Resistance and Bending Strength hinges on meticulous process design and precision manufacturing. At Shandong Donghong Pipe Industry Co., Ltd., we utilize cutting-edge equipment for critical process control, drawing from years of industry-leading expertise. This dedication to excellence ensures we deliver superior products that our customers can consistently rely on, establishing us as a trusted name in the field.
In response to the increasing demand for large-diameter pipelines, Donghong has expanded its offerings to include large-diameter anticorrosion steel pipes that meet the rigorous standards of international quality. Our commitment to excellence ensures we provide top-tier products that stand up to global expectations.
2. To address the diverse requirements of various projects, Donghong has innovated a range of connection methods for large-diameter anticorrosive steel pipes. Our solutions include flexible socket connections, butt welding, socket lap weld, ball lap weld, and custom bevel forms, offering versatile options for project needs. Remarkably, we pioneered the development of large-diameter socket flexible connections, with socket calibers reaching 1.8 meters. This innovation was first implemented in key water conservancy projects across China, establishing us as trailblazers and leaders in large-diameter steel pipe socket connections within the nation.
Donghong boasts a state-of-the-art facility dedicated to the production of large-diameter, high-pressure pipe fittings. These fittings are crafted to meet the stringent demands of various projects. Moreover, we offer custom design services to create specialized pipe fittings tailored to specific customer requirements and project environments, ensuring optimal performance and satisfaction.
Explore our diverse connection solutions.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Introducing Donghong (Shandong Donghong Pipe Industry Co., Ltd.), affectionately known as Donghong, a beacon of innovation with the stock code 603856. Nestled in the cultural heart of Qufu, China, this prestigious company was founded in 1997 and has since become a powerhouse in engineering pipeline solutions. As a leading manufacturer, service provider, and general contractor, Donghong specializes in a diverse array of pipes that cater to rainwater and sewage drainage, municipal needs, industrial applications, and even pivotal national projects. A historic milestone was achieved on November 6, 2017, when Donghong proudly became the first engineering composite pipeline manufacturer listed on the main board of Shanghai.
Donghong stands at the forefront of innovation with over 200 dedicated R&D professionals and a remarkable portfolio of more than 100 patents. Our commitment to advancing the digital, informational, and intelligent aspects of pipeline engineering is supported by prestigious platforms like the national enterprise technology center, CNAS-certified national laboratory, and collaborative workstations with esteemed academicians and postdoctoral researchers. Donghong is truly a leader in driving the future of the engineering pipeline industry.
Donghong is deeply embedded in national key strategic and livelihood projects, shaping the future of the engineering pipeline industry. We proudly support initiatives such as the South-to-North Water Diversion, Hanjinwei, and the expansive Beijing-Xinjiang Expressway. Our influence extends through transformative projects like One Belt, One Road, standardized farmlands, and the integration of urban and rural water supplies, including Liren gas and centralized heating. Donghong stands as a trusted partner in the development of essential infrastructure.
At Shandong Donghong Pipe Industry Co., Ltd., we prioritize efficiency and reliability in our packaging and shipping processes. Through our strategic alliances with over five elite 5A-level logistics companies, we harness a wealth of transportation expertise. Whether it's land, rail, or sea, our hybrid logistics solutions seamlessly combine automobile, railway, and port shipping to conquer any climate and reach even the most remote and challenging destinations. With our meticulous transportation strategy, we ensure that each and every shipment of our Spiral Welded Steel Pipe with High Cathodic Stripping Resistance and Bending Strength reaches your site promptly and in pristine condition, providing unparalleled service every step of the way.
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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