Dive into Excellence with our Inner Epoxy Resin, Outer Polyethylene Coated Composite Steel Pipe! This marvel of engineering combines robust steel with advanced anti-corrosion technology, resulting in a steel-plastic composite masterpiece. Starting with meticulously pre-treated steel as its core, each pipe is meticulously coated on the inside with fusion bonded epoxy powder, ensuring unmatched durability and resistance. The outer layer boasts a protective polyethylene powder coating, delivering an extra shield against environmental factors. Experience the harmony of strength and protection, perfect for long-lasting applications.
| 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 your solution with ease! Our products can be customized to meet your specific needs and requirements.
1. Corrosion Resistance
Crafted with advanced anti-corrosion materials such as polyethylene and epoxy resin, these premium polymer materials boast outstanding corrosion resistance. They are skillfully designed to guard against soil and fluid damage, significantly extending the pipeline's longevity and ensuring a durable service life.
2. Excellent Hydraulic Properties
With an impeccably smooth inner wall, this pipe is engineered to resist scaling and boasts a low coefficient of friction. Its sleek, non-adhesive surface optimizes the pipeline's conveying capacity while minimizing pressure loss and reducing energy consumption during water transmission.
3. Good Hygiene Performance
The epoxy resin coating inside the pipeline offers a smooth, non-scaling surface that is not only safe and hygienic but also meets stringent GB/T17219 health standards. This impeccable design helps in effectively preventing any contamination of the water quality conveyed through the pipeline.
4. Superior Adhesion of Coating
Enhanced with modified epoxy resin and polyethylene powder, the coating forms a robust chemical bond with metal, delivering exceptional adhesion. The outer polyethylene layer exhibits remarkable toughness and impact resistance, guarding against scratches, drags, and plant root punctures.
5. Long Life
Engineered for longevity, this anti-corrosion steel pipe is built to last 30 to 50 years under normal construction and usage conditions, offering a dramatic increase in lifespan compared to standard steel pipes.
6. Good Connection Security
Versatility is key, with a variety of reliable connection methods to cater to different environments and pressure needs. Options include flanged, quick coupling, butt welding, lined with stainless steel, and socket connection, all of which provide mature and dependable connectivity.
1. The pinnacle of our product's quality is a direct reflection of our meticulous process design and advanced manufacturing techniques. At Donghong, we leverage cutting-edge equipment to ensure rigorous control over crucial quality processes. This, combined with our extensive manufacturing experience, enables us to consistently deliver products of unparalleled quality, establishing us as a trusted partner in the industry.
Acknowledging the increasing demand for large-diameter pipelines, Donghong has expanded its offerings to include large-diameter anticorrosion steel pipes. These products are crafted to meet and exceed international standards, ensuring that our customers receive nothing short of excellence.
2. To cater to the diverse requirements of various projects, Donghong has engineered an array of connection methods for large-diameter anticorrosive steel pipes. These include flexible socket connections, butt welding, socket lap welds, ball lap welds, and custom bevel forms, among others. Notably, we pioneered the large-diameter socket flexible connection in the industry, achieving a maximum socket caliber of 1.8M. This innovation was first implemented in key water conservancy projects across China, solidifying our position as trailblazers and leaders in the field of large-diameter steel pipe socket connections.
Donghong boasts a dedicated facility for producing large-diameter, high-pressure pipe fittings. This factory is geared towards delivering pipe fittings that meet the specific demands of various projects. Furthermore, we offer customization services to tailor special pipe fittings according to individual customer requirements and unique project environments.
Other connection methods.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.), proudly known by its stock code 603856, stands as a beacon of innovation and excellence in the heart of the culturally rich city of Qufu, China, the birthplace of Confucius. Established in 1997, Donghong has carved a niche as a premier manufacturer and service provider in the realm of pipeline engineering. Offering a comprehensive suite of solutions, our expertise spans across four main categories of functional and bespoke pipelines: rainwater and sewage drainage, municipal systems, industrial and mining pipelines, and those crucial for national key projects. As a testament to our pioneering spirit, we made history on November 6, 2017, by becoming the first manufacturer of engineering composite pipelines to be listed on the main board of Shanghai-a milestone that underscores our leadership in this dynamic industry.
With a formidable team of over 200 R&D experts and a portfolio boasting more than 100 patents, Donghong is at the forefront of innovation. Our commitment to research excellence is reinforced by collaborations with esteemed national technology platforms, including the national enterprise technology center, CNAS-accredited laboratories, an academician expert workstation, and a postdoctoral workstation. Through these initiatives, Donghong is pioneering advancements in the digitization, informatization, and intelligent transformation of pipeline engineering, setting new benchmarks and leading the industry into the future.
Donghong is a cornerstone in the realm of national key strategic and livelihood projects, making significant contributions to pivotal initiatives like the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and the visionary One Belt, One Road. Our expertise extends to enhancing standardized farmland, urban and rural water supply integration, Liren gas, and centralized heating solutions. As leaders in the engineering pipeline industry, we remain committed to driving progress and sustainability in these critical areas.
At Donghong, we have meticulously crafted strategic alliances with over five elite 5A-level logistics companies, ensuring that our transportation network is second to none. With extensive experience in automotive, railway, port, and maritime logistics, we guarantee seamless delivery regardless of weather conditions or geographical challenges. Whether navigating the sweltering heat or icy cold, reaching remote or rugged locations, our superior service is unwavering. Our robust transportation strategy is designed to ensure every shipment arrives at the customer site promptly and efficiently.
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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