Discover the epitome of innovation and resilience with our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe. This extraordinary steel-plastic composite marvel stands as a testament to superior anti-corrosion engineering. Crafted from expertly pre-treated steel pipe as the foundation, it boasts an inner surface enveloped in fusion-bonded epoxy powder, following a meticulous heating process. The outer surface is adorned with a robust polyethylene powder coating, ensuring unmatched durability and protection. Experience the pinnacle of performance and longevity with this state-of-the-art 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: Tailor this exceptional product to your specific needs, as customization options are readily available to ensure it meets all your unique requirements.
1. Corrosion Resistance
Our spiral welded steel pipes are crafted with premium anti-corrosion materials like polyethylene and epoxy resin. These superior materials boast exceptional resistance against corrosion, effectively safeguarding the pipeline from the damaging effects of soil and fluids, thereby significantly extending the pipeline's service life.
2. Excellent Hydraulic Properties
The inner wall of our pipes is impeccably smooth and resistant to scaling, boasting a low friction coefficient. This sleek, non-adhesive surface ensures not only enhanced conveyance capacity but also minimizes pressure loss and reduces energy consumption during water transmission.
3. Exceptional Hygiene Performance
Featuring a smooth epoxy resin coating within, our pipes resist scaling and are completely safe and hygienic. The anti-corrosion materials meet GB/T17219 health standards, effectively preventing any contamination of water quality.
4. Superior Adhesion of Coating
Our innovative epoxy resin and modified polyethylene powder establish a robust chemical bond with metal, ensuring exceptional adhesion. The outer polyethylene layer offers outstanding toughness and impact resistance, protecting against scratches from drag or knocks and resisting plant root puncture.
5. Extended Longevity
Engineered for durability, our anti-corrosion steel pipes promise a remarkable lifespan of 30 to 50 years, even under normal construction and usage conditions, far surpassing ordinary steel pipes.
6. Reliable Connection Security
Our pipes offer versatile connection methods to accommodate varying environmental and pressure requirements, including flanged, quick coupling, butt welding, stainless steel lining, and socket connections. Each method ensures a mature, reliable, and secure pipeline connection.
1. At Shandong Donghong Pipe Industry Co., Ltd., we recognize that exceptional product quality hinges on meticulous process design and advanced manufacturing techniques. Equipped with state-of-the-art machinery, Donghong expertly oversees key stages of quality control, combining cutting-edge technology with decades of proficient experience. This commitment ensures we deliver products of unparalleled quality, positioning us as a reliable and esteemed partner in the industry.
Acknowledging the increasing demand for large-diameter pipelines, Donghong has expanded its product line to include large-diameter anticorrosion steel pipes. These pipes are meticulously crafted to meet and exceed international standards, promising excellence and durability that stands the test of time.
2. To cater to the diverse needs of various projects, Donghong has innovatively developed a spectrum of connection methods for large-diameter anticorrosive steel pipes. From flexible socket connections to butt welding, socket lap welding, and even ball lap welding, the choices are vast. With options like customized bevel forms, Donghong leads the industry, notably pioneering the large-diameter socket flexible connection. This groundbreaking advancement, with a maximum socket caliber of 1.8M, has been successfully implemented in prominent water conservancy projects across China, marking Donghong as a trailblazer and authority in large-diameter steel pipe socket connections.
Donghong boasts a dedicated factory specializing in large-diameter, high-pressure pipe fittings, designed to meet the rigorous demands of various projects. Beyond standard offerings, we excel in crafting bespoke pipe fittings tailored to specific customer needs and unique project environments, ensuring unmatched customization and adaptability.
Further adaptable connection methods.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.)-commonly referred to as 'Donghong' with the stock code 603856-prides itself on its prestigious heritage, nestled in the cultural heart of Qufu, China, the revered hometown of Confucius. Established in 1997, Donghong stands as a beacon in the engineering pipeline sector, offering unparalleled expertise as both a manufacturer and a comprehensive service provider. Our business showcases four pivotal categories of customizable and functional pipelines: rainwater and sewage drainage, municipal infrastructure, industrial and mining applications, and pipelines for national key projects. A landmark achievement was marked on November 6, 2017, when Donghong was proudly listed on the main board in Shanghai, distinguishing itself as the first engineering composite pipeline manufacturer in China to achieve this honor.
With a robust team exceeding 200 dedicated R&D professionals and a portfolio of over 100 proprietary patents, Donghong is at the forefront of innovation. Our endeavors are supported by prestigious national platforms including the National Enterprise Technology Center, the National CNAS Laboratory, an Academician Expert Workstation, and a Postdoctoral Workstation. These collaborations propel our pioneering research in the digitalization, informatization, and intelligent transformation of pipeline engineering, solidifying Donghong's leadership in the industry.
Donghong is a pivotal contributor to both national strategic and livelihood-enhancing projects. As a vanguard in the engineering pipeline industry, our expertise is integral to monumental projects like the South-to-North Water Diversion, Hanjinwei, the Beijing-Xinjiang Expressway, the One Belt, One Road initiative, and many more. We are at the helm of enhancing standardized farmlands, integrating urban and rural water supply systems, advancing Liren gas projects, and optimizing centralized heating solutions, consistently driving forward the infrastructure that fuels our nation's progress.
At Donghong, we have forged strategic alliances with over five elite 5A-level logistics companies, ensuring an unparalleled breadth of transport expertise. Leveraging a multifaceted logistics network that encompasses automobile, railway, and port shipping solutions, we expertly navigate the challenges of extreme temperatures and remote or difficult terrains. With our robust and integrated transportation strategy, we promise to deliver each shipment to your doorstep swiftly and efficiently, offering you seamless service 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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