Introducing our state-of-the-art Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe, a marvel of steel-plastic composite engineering. Engineered for ultimate durability, this innovative product boasts exceptional anti-corrosion properties, crafted from meticulously pre-treated steel pipe. The inner surface is seamlessly enhanced with a fusion-bonded epoxy powder coating after precise heating, while the outer surface is enveloped in a robust polyethylene powder coating for unparalleled protection.
| 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: This exceptional product can be tailored to meet the specific needs and preferences of our valued customers.
1.Corrosion resistance
Crafted from top-tier anti-corrosion materials such as polyethylene and epoxy resin, this pipeline boasts exceptional resistance against corrosion. These high-performance polymers shield the pipeline from the damaging effects of soil and fluid, significantly extending its lifespan.
2. Excellent hydraulic properties
With a remarkably smooth inner wall that resists scaling, this pipeline promises a low friction coefficient. Its sleek, non-adhesive surface enhances fluid conveyance capabilities while minimizing both pressure loss and energy consumption during water transmission.
3. Good hygiene performance
The pipeline's internal epoxy resin coating is designed to be exceptionally smooth and resistant to scaling, ensuring a safe and hygienic water supply. Meeting stringent GB/T17219 health standards, it effectively prevents any contamination, maintaining optimal water quality.
4. Superior adhesion of coating
The epoxy resin and polyethylene powder undergo modification to bond robustly with metal surfaces, creating a strong chemical bond. The outer polyethylene layer is highly durable, offering remarkable toughness and impact resistance to withstand scratches, impacts, and even plant root penetration.
5. Long life
Engineered for longevity, this anti-corrosion steel pipe has a phenomenal lifespan of 30 to 50 years under normal construction and use conditions, far surpassing that of conventional steel pipes.
6. Good connection security
Adaptable and reliable, this pipeline supports a variety of connection methods to suit diverse environments and pressure requirements. Options include flanged, quick coupling, butt welding, stainless steel lining, and socket connections-each mature and trustworthy.
1. The ultimate excellence of our products is crafted through meticulous process design and exceptional manufacturing practices. At Shandong Donghong Pipe Industry Co., Ltd., we utilize cutting-edge equipment to ensure key quality control, blending it seamlessly with our extensive experience in manufacturing. Our commitment is to deliver unparalleled products, making us a trustworthy enterprise that you can rely on for high-quality solutions.
In response to the surging demand for expansive pipelines, Shandong Donghong Pipe Industry Co., Ltd. proudly introduces our large-diameter anticorrosion steel pipes, engineered to meet and exceed international standards. We are dedicated to offering premier products that stand strong against the challenges of global technical expectations.
2. To cater to the diverse requirements of various projects, Shandong Donghong Pipe Industry Co., Ltd. has innovated multiple connection solutions for our large-diameter anticorrosive steel pipes. Our offerings include flexible socket connections, butt welding, socket lap welds, ball lap welds, customized bevel forms, and more. These provide extensive options to suit any project needs. Notably, we pioneered the large-diameter socket flexible connection in the industry, achieving a remarkable maximum socket caliber of up to 1.8M. Our innovation was first employed in key water conservancy projects throughout China, cementing our status as trailblazers and leaders in China's large-diameter steel pipe socket connection arena.
At Shandong Donghong Pipe Industry Co., Ltd., our factory is adept at producing large-diameter, high-pressure pipe fittings, tailored to meet the demands of various projects. We also offer bespoke customization of special pipe fittings, precisely designed to align with the unique specifications and environmental conditions of our clients' projects.
Other connection methods.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.), fondly referred to as Donghong, stands as a pillar of excellence in engineering pipeline solutions. With its roots planted in the historical and cultural heart of China, the charming city of Qufu-home to the venerable Confucius-this industry titan has been shaping the future of pipelines since its inception in 1997. As a pioneering force, Donghong not only manufactures engineering pipelines but also offers comprehensive pipeline engineering services. Our illustrious journey reached a momentous milestone on November 6, 2017, with our prestigious debut on the main board of the Shanghai Stock Exchange, under stock code 603856-making us the trailblazing composite pipeline manufacturer listed on the main board in China. Our core business spans across four integral categories: rainwater and sewage drainage pipelines, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects, defining us as a premier pipeline engineering general contractor.
Donghong leads the charge in innovation, boasting a formidable team of over 200 dedicated R&D professionals and a portfolio of more than 100 groundbreaking patents. We leverage prestigious national technology platforms, including the esteemed national enterprise technology center, CNAS-certified national laboratory, academician expert workstation, and postdoctoral research hub, to push the boundaries of digital, informational, and intelligent pipeline advancements. Our relentless pursuit of excellence cements our role as a vanguard in driving the evolution of the engineering pipeline industry.
A trusted partner in national progress, Donghong's expertise extends to pivotal strategic initiatives and vital community projects. As leaders in the engineering pipeline sector, we are proud to contribute to transformative endeavors such as the South-to-North Water Diversion, Hanjinwei, the Beijing-Xinjiang Expressway, and the visionary One Belt, One Road initiative. Our commitment to excellence also supports projects like standardized farmland development, urban and rural water supply integration, Liren gas deployment, centralized heating systems, and much more, empowering communities across the nation.
Donghong has forged robust strategic alliances with a host of prestigious 5A-level logistics giants, boasting an expansive portfolio of transportation mastery. With an unparalleled blend of automobile conveyance, railway transit, and port and maritime logistics, we guarantee unrivaled service across all terrains and climates, from sweltering heat to bone-chilling cold, and even in the most remote and challenging locations. Our meticulously crafted, all-encompassing transportation strategy ensures that every shipment is swiftly and reliably delivered to the customer site, embodying our commitment to excellence in timeliness and service quality.
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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