Introducing our innovative Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe - a marvel of modern engineering from Shandong Donghong Pipe Industry Co., Ltd. This steel-plastic composite pipe is designed to provide unmatched anti-corrosion protection. It starts with a meticulously pre-treated steel pipe as the foundation. The internal surface is expertly coated with fusion-bonded epoxy powder, ensuring robust resilience. The exterior gleams with polyethylene powder coating, enhancing durability and performance. Experience the epitome of protection and reliability with our cutting-edge product.
| 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: Our products offer flexibility and can be tailored to meet your specific requirements. Customization options are available to cater to your unique needs.
1. Corrosion Resistance
Crafted with the finest anti-corrosion materials, such as polyethylene and epoxy resin, this marvel of engineering offers unparalleled corrosion resistance. These high-performance polymers act as a robust shield, safeguarding pipelines from potential soil and fluid damage, thereby greatly extending the pipe's longevity and reliability.
2. Excellent Hydraulic Properties
Experience the pinnacle of hydraulic excellence with our pipes' smooth inner walls, which are designed to resist scaling. With a low friction coefficient and non-adhesive surface, our pipes enhance conveyance efficiency while minimizing pressure loss and reducing water transmission energy consumption.
3. Good Hygiene Performance
Our state-of-the-art epoxy resin coating ensures a pristine, scale-resistant surface, promoting safety and hygiene. Adhering to the stringent GB/T17219 health standards, it effectively prevents any contamination, maintaining the purity of water quality throughout its journey.
4. Superior Adhesion of Coating
The innovative combination of modified epoxy resin and polyethylene powder forms a durable chemical bond with metal, ensuring exceptional adhesion. The outer polyethylene layer boasts remarkable toughness and impact resistance, expertly fending off scratches from dragging, knocks, and even plant root intrusions.
5. Long Life
Designed for endurance, our anti-corrosion steel pipe confidently serves for an impressive 30 to 50 years, under normal construction and use conditions, offering a significant boost in lifespan over traditional steel pipes.
6. Good Connection Security
Engineered for versatility and security, our pipes accommodate a variety of connection methods to suit diverse environments and pressure needs. Whether through flanged, quick coupling, butt welding, lined with stainless steel, or socket connections, our solutions are mature, reliable, and effortlessly adaptable.
1. The ultimate quality of a product is intricately tied to the precision in its process design and manufacturing. Donghong excels with its advanced machinery and technology, ensuring meticulous control over key production processes. Backed by years of expert manufacturing experience, we are committed to delivering products of unmatched quality, establishing ourselves as a trustworthy enterprise in the industry.
In response to the rising demand for large-diameter pipelines, Donghong has expanded its offerings to include large-diameter anticorrosion steel pipes. These are crafted to meet and often exceed international standards, ensuring we provide top-tier products that cater to global requirements.
2. To cater to the diverse needs of various projects, Donghong has innovatively developed multiple connection methods for our large-diameter anticorrosive steel pipes. Options such as flexible socket connections, butt welding, socket lap weld, ball lap weld, and customized bevel forms are available, offering extensive choices to suit any project. Notably, we pioneered the large-diameter socket flexible connection technique, accommodating socket calibers up to 1.8M. This groundbreaking development was first implemented in significant water conservancy projects across China, positioning us as leaders and trailblazers in China's large-diameter steel pipe socket connection market.
Donghong boasts a specialized facility dedicated to the production of large-diameter, high-pressure pipe fittings. This factory is equipped to support an array of projects by providing not just standard but also custom-tailored pipe fittings. Our ability to customize based on specific client requirements and project conditions further cements our role as a pivotal player in the industry.
Beyond standard offerings, various other connection methods are also available to suit the unique demands of diverse projects.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) is a trailblazing enterprise headquartered in Qufu, China, the birthplace of Confucius. Established in 1997, Donghong (stock code: 603856) has emerged as a leading manufacturer and general contractor of innovative engineering pipelines and services. Our expertise encompasses a diverse range of functional and bespoke pipelines, catering to rainwater and sewage drainage, municipal needs, industrial and mining applications, and pivotal national projects. Recognizing our pioneering spirit, Donghong became the first engineering composite pipeline manufacturer to be listed on the Shanghai Stock Exchange main board on November 6, 2017.
With a robust team of over 200 R&D professionals and a portfolio of over 100 patents, Donghong is at the forefront of technological advancement. Our commitment to innovation is supported by a suite of national platforms including a national enterprise technology center, CNAS laboratory, an esteemed academician expert workstation, and a dynamic postdoctoral workstation. This infrastructure propels our efforts in digitalization, informatization, and intelligent pipeline solutions, positioning Donghong as a leader in engineering pipeline innovation.
Donghong is a cornerstone in the execution of national strategic and community-enhancing projects. Our influence spans across monumental initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and the pioneering Belt and Road Initiative. We are dedicated to transforming urban and rural water supply systems, advancing standardized farmland, and supporting vital infrastructure like Liren gas and centralized heating systems, thus reinforcing our leadership in the engineering pipeline sector.
At Donghong, we have cultivated an unparalleled network of strategic alliances with over five elite 5A-level logistics companies, ensuring that our expertise in transportation shines through every delivery. With countless years of experience in the industry, we masterfully blend automobile transportation, railway conveyance, and port and shipping logistics. Regardless of whether the journey takes us through sweltering heat, chilling cold, remote landscapes, or challenging terrains, our commitment to providing unparalleled service remains unwavering. Our meticulously crafted transportation strategy is designed to guarantee that every shipment swiftly reaches its destination, ensuring punctual delivery right to the customer's doorstep. Trust Donghong to make logistics seamless and efficient, every 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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