The Superior Internal Epoxy External PE Coated Steel Pipe is an engineering marvel designed for durability and resilience in extreme temperature conditions. This innovative steel-plastic composite product integrates a meticulously pre-treated steel pipe as its core. To ensure maximum anti-corrosion protection, the inner surface is elegantly coated with fusion-bonded epoxy powder post heating, while the outer surface is enveloped with a robust layer of polyethylene powder. This dual-layered protection ensures exceptional longevity and reliability in challenging environments.
| 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: Fully customizable to meet specific customer requirements, ensuring versatility in application.
1. Corrosion Resistance
Our pipes are crafted using premium anti-corrosion materials like polyethylene and epoxy resin, renowned for their exceptional durability against environmental challenges. These advanced polymers form a robust shield, proactively preventing soil and fluid-induced damage, thereby substantially extending the pipeline's service life.
2. Excellent Hydraulic Properties
Designed with a flawlessly smooth inner wall, our pipes resist scaling and boast a low friction coefficient. This ensures optimal flow efficiency, minimizing pressure loss and reducing energy consumption for water transmission, thus enhancing the overall performance of the pipeline.
3. Good Hygiene Performance
The internal epoxy resin coating of our pipes is not only smooth but also adheres to the stringent GB/T17219 health standards. This guarantees that the water remains pure and uncontaminated while safely flowing through, protecting the water quality from any potential pipeline-induced impurities.
4. Superior Adhesion of Coating
Our innovative combination of modified epoxy resin and polyethylene powder ensures a formidable chemical bond with the metal surface, delivering exceptional coating adhesion. The outer polyethylene layer is engineered for superior toughness and impact resistance, effectively withstanding scratches from rough handling and plant root punctures.
5. Long Life
Engineered for longevity, our anti-corrosion steel pipes promise a reliable service life of 30 to 50 years, even under normal usage conditions. This significantly surpasses the lifespan of conventional steel pipes, offering an enduring solution for various applications.
6. Good Connection Security
Our pipes come with a versatile range of connection methods to cater to diverse environmental and pressure requirements. Whether it's flanged, quick coupling, butt welding, lined with stainless steel, or socket connections, each method is tried, tested, and dependable, ensuring secure and reliable pipeline integration.
1. The pinnacle of product excellence lies in the precision of process design and meticulous manufacturing. At Donghong, we leverage state-of-the-art equipment for pinpoint quality control and infuse decades of expertise to deliver products that resonate with excellence. We are your trusted partner in achieving unparalleled quality.
With the rising demand for expansive pipelines, Donghong proudly introduces large-diameter anticorrosion steel pipes, crafted to meet and exceed international benchmarks. Our products are designed to provide outstanding durability and reliability, ensuring they stand strong in the face of global standards.
2. To cater to the diverse requirements of various projects, Donghong has innovated a spectrum of connection methods for large-diameter anticorrosive steel pipes. From flexible socket connections to butt welding, socket lap welds, ball lap welds, and tailored bevel configurations, we offer an array of options. Notably, we pioneered the large-diameter socket flexible connection, achieving a remarkable socket caliber of up to 1.8M. This innovation was first implemented in China's major water conservancy projects, establishing us as trailblazers and leaders in large-diameter steel pipe socket connections.
Donghong boasts a specialized factory dedicated to large-diameter, high-pressure pipe fittings. This facility not only caters to the demands of extensive projects but also provides bespoke solutions, tailoring pipe fittings to meet specific customer needs and environmental conditions with precision and expertise.
Explore our diverse connection methods tailored to meet various project demands.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) stands tall in the illustrious hometown of Confucius, Qufu, China. Founded in 1997, Donghong is a powerhouse in the engineering pipeline sector, offering comprehensive pipeline engineering services and excelling as a general contractor. Our portfolio boasts an impressive array of functional and bespoke pipelines, including those for rainwater and sewage drainage, municipal needs, industrial and mining applications, as well as pivotal national projects. As the trailblazer in engineering composite pipeline manufacturing, Donghong made its mark by getting listed on the main board of Shanghai on November 6, 2017, setting a benchmark as the first in China to achieve such a distinction.
At Donghong, innovation is at the heart of everything we do. With a team of over 200 R&D experts and an impressive repertoire of more than 100 patents, we harness cutting-edge national technology R&D platforms. Our strategic assets include a national enterprise technology center, a national CNAS laboratory, and specialized workstations for academicians and postdoctoral researchers. These resources empower us to pioneer advancements in the digitalization, informatization, and intelligent transformation of pipeline engineering, thereby steering the industry's future.
Donghong is your partner in progress for national key strategic and essential livelihood projects. We are at the forefront of the engineering pipeline industry, contributing to iconic initiatives like the South-to-North Water Diversion, the Hanjinwei project, the Beijing-Xinjiang Expressway, and the globally influential One Belt, One Road. We also champion standardized farmland, urban-rural water supply integration, Liren gas pipelines, and centralized heating solutions, solidifying our role as a vital player in national infrastructure development.
At Donghong, we take pride in our unrivaled logistics capabilities, forged through strategic alliances with over five esteemed 5A-level logistics powerhouses. Drawing from our extensive years of transportation prowess, we weave together a seamless network of automotive, railway, port, and maritime logistics. Be it sweltering heat or biting cold, and regardless of how distant or challenging the destination, we are committed to delivering impeccable service. Our meticulous transportation strategy guarantees that each shipment arrives at the customer site with unparalleled speed and precision.
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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