Introducing our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe, a masterful fusion of steel and plastic innovation! This advanced steel-plastic composite comes endowed with outstanding anti-corrosion properties. Engineered from a meticulously pre-treated steel pipe as the foundational base, it showcases a seamless fusion-bonded epoxy powder coating that graces the inner surface. The exterior is elegantly enveloped with a robust polyethylene powder coating, creating a superior shield against environmental elements. Experience the pinnacle of durability and protection with this state-of-the-art creation.
| 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 requirements. Customization available to meet your precise needs.
1. Unmatched Corrosion Resistance
Our spiral welded steel pipe is fortified with advanced anti-corrosion materials like polyethylene and epoxy resin, both of which are renowned for their outstanding corrosion resistance. These polymer materials effectively shield the pipeline from soil erosion and fluid damage, significantly extending the pipeline's operational lifespan and ensuring long-term reliability.
2. Exceptional Hydraulic Properties
Designed with a flawlessly smooth inner wall, this pipe resists scaling while maintaining a low friction coefficient. Its non-adhesive surface properties guarantee optimal flow capacity. This design not only enhances the pipeline's efficiency in transport but also minimizes pressure loss and energy consumption during water transmission.
3. Remarkable Hygiene Performance
Featuring an epoxy resin coating on the interior, the pipe ensures a smooth, scale-resistant surface that is both safe and hygienic. The use of high-standard anticorrosion materials complies with the GB/T17219 health standard, effectively preventing any contamination of water quality, thereby offering clean and safe water transportation.
4. Superior Coating Adhesion
Utilizing modified epoxy resin and polyethylene powder, the coating forms a robust chemical bond with the metal, ensuring exceptional adhesion. The outer polyethylene layer boasts excellent toughness and impact resistance, safeguarding against scratches, impacts, and even plant root penetration, ensuring durable protection.
5. Extended Longevity
Constructed for durability, this anti-corrosion steel pipe is engineered to last between 30 to 50 years under standard construction and usage conditions, representing a substantial enhancement over conventional steel pipes and providing a long-lasting solution for infrastructure needs.
6. Secure and Versatile Connections
Offering a multitude of connection options to accommodate diverse environments and pressure demands, our pipes can be securely connected through methods like flange, quick coupling, butt welding, stainless steel lining, and socket connections. These mature and reliable systems ensure robust and secure pipeline connections.
1. At Donghong, we believe that exceptional product quality is rooted in meticulously crafted process design and manufacturing excellence. Armed with advanced technology and a wealth of manufacturing experience, we deliver products of impeccable quality, establishing ourselves as a trusted enterprise dedicated to customer satisfaction.
With the surging demand for large-diameter pipelines, Donghong proudly offers top-tier large-diameter anticorrosion steel pipes crafted to meet international standards, ensuring unmatched performance and reliability.
2. To cater to diverse project requirements, Donghong has ingeniously engineered a spectrum of connection methods for large-diameter anticorrosive steel pipes. From flexible socket connections to butt welds, socket lap welds, and ball lap welds, along with customized bevel forms and more, we offer an array of choices. Pioneering the industry, we developed the large-diameter socket flexible connection, with a maximum socket caliber of up to 1.8M, proudly first utilized in significant water conservancy projects across China, cementing our leadership in the large-diameter steel pipe socket connection domain.
At Donghong, our state-of-the-art large-diameter, high-pressure pipe fittings factory is dedicated to producing components that meet the highest standards for demanding projects. We also offer bespoke solutions, tailoring special pipe fittings to align perfectly with the specific needs and environments of our valued customers.
Diverse and innovative connection methods tailored for every project need.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) is an eminent leader in the engineering pipeline sector, boasting a prestigious stock code: 603856. Nestled in the culturally rich and historic hometown of Confucius, Qufu, China, Donghong has its roots planted firmly since 1997. As a premier manufacturer and service provider, Donghong excels in offering engineering pipeline solutions, acting as a general contractor for a myriad of pipeline engineering projects. Our portfolio shines with four distinct categories of functional and tailor-made pipelines, encompassing rainwater and sewage drainage, municipal systems, industrial and mining applications, and national key project pipelines. On November 6, 2017, Donghong proudly marked its place on the main board of Shanghai's stock exchange, becoming the first engineering composite pipeline manufacturer in China to achieve this esteemed listing.
At the forefront of innovation, Donghong champions its robust team of over 200 R&D experts and holds a repository of more than 100 patents. Anchored by esteemed national platforms such as the enterprise technology center, the CNAS-accredited national laboratory, and workstations of distinguished academicians and postdoctoral researchers, Donghong is pioneering the wave of digital, informational, and intelligent transformations in pipeline engineering. We are committed to spearheading the engineering pipeline industry's progress.
Donghong is a pivotal player in numerous national key strategic and livelihood projects, asserting its influence across significant endeavors. We proudly contribute to transformative projects like the South-to-North Water Diversion, the Hanjinwei initiative, Beijing-Xinjiang Expressway, and the visionary One Belt, One Road. Our expertise extends into the development of standardized farmland, urban and rural water supply integration, Liren gas networks, and extensive centralized heating systems. Donghong is your trusted partner in shaping the future of pipeline engineering, enhancing infrastructure for a brighter tomorrow.
At Donghong, we proudly boast long-standing strategic alliances with over five premier 5A-level logistics providers. Our extensive experience in logistics and transportation ensures seamless delivery. Whether by road, rail, or sea, we navigate the challenges of extreme heat, biting cold, or distant and rugged terrains with ease. Our robust transportation strategy guarantees that every shipment reaches its destination promptly, every time, ensuring optimal service excellence.
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.
Audited Supplier 
){kind=link}