Introducing our premier Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe! This marvel of engineering is a sophisticated steel-plastic composite, expertly designed for superior anti-corrosion performance. Meticulously crafted using pre-treated steel pipes as the foundation, the interior is seamlessly coated with fusion-bonded epoxy powder post-heating, while the exterior boasts a resilient layer of polyethylene powder. This dual-layered protection promises unparalleled durability and longevity in various 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: Tailored customization available to perfectly align with your specific requirements.
1. Corrosion Resistance
Our pipes are armored with anti-corrosion materials like polyethylene and epoxy resin, remarkable polymer materials known for their outstanding corrosion resistance. These materials form a formidable shield against soil and fluid damage, significantly extending the pipeline's service life.
2. Excellent Hydraulic Properties
Designed with a meticulously smooth inner wall, our pipes resist scaling and boast a low coefficient of friction. This seamless surface and non-adhesive properties not only enhance the pipeline's conveying capability but also significantly reduce pressure loss and energy consumption during water transmission.
3. Good Hygiene Performance
The epoxy resin coating within our pipelines presents a smooth, non-scaling, and hygienic surface. Compliant with GB/T17219 health standards, this corrosion-resistant material ensures the pipeline does not compromise water quality, providing a safe and contaminant-free passage.
4. Superior Adhesion of Coating
Our advanced epoxy resin and polyethylene powder formulations create a robust chemical bond with metal, resulting in exceptional adhesion. The exterior polyethylene layer exhibits excellent toughness and impact resistance, proficiently guarding against scratches from handling, and is resilient to plant root penetration.
5. Long Life
Engineered for longevity, our anti-corrosion steel pipes boast a service life of 30 to 50 years under normal construction and usage conditions. This represents a substantial enhancement over the lifespan of ordinary steel pipes.
6. Good Connection Security
Our pipes are designed for secure and versatile connections, accommodating various environments and pressure requirements. Connection methods include flanging, quick coupling, butt welding, stainless steel lining, and socket connection, all proven to deliver mature and reliable bonding.
1. The superior quality of our products is a direct result of our meticulous process design and advanced manufacturing techniques. Shandong Donghong Pipe Industry Co., Ltd. utilizes state-of-the-art equipment to meticulously manage key process controls, leveraging our extensive manufacturing experience. Our mission is to consistently deliver products of exceptional quality, establishing ourselves as a trustworthy partner in the industry.
Recognizing the increasing demand for large-diameter pipelines, Donghong has proactively expanded our offerings to include large-diameter anticorrosion steel pipes. These pipes are meticulously crafted to meet and exceed international standards, ensuring premium quality that stands the test of rigorous applications.
2. To cater to the diverse needs of various projects, Donghong has ingeniously developed a plethora of connection methods for our large-diameter anticorrosive steel pipes. These include flexible socket connection, butt welding, socket lap welding, ball lap welding, and customizable bevel forms, providing a versatile selection for project requirements. We take pride in pioneering the large-diameter socket flexible connection, with a maximum socket diameter reaching 1.8M. This innovative solution has been first implemented in key water conservancy projects across China, cementing our status as industry pioneers and leaders in large-diameter steel pipe connection technology.
At Donghong, our specialized facility for large-diameter, high-pressure pipe fittings is at the forefront of innovation. We are equipped to produce robust pipe fittings for high-pressure applications, while also offering tailored customization services to meet the unique demands of our customers and the specific conditions of their projects.
Additional Connection Solutions.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Shandong Donghong Pipe Industry Co., Ltd., also known by its stock code 603856, proudly stands at the heart of Qufu, the celebrated hometown of Confucius in China. Established in 1997, Donghong has carved a niche as a pioneering manufacturer and provider of engineering pipeline services. As a leading general contractor in the pipeline industry, Donghong specializes in four key categories of tailor-made pipelines: rainwater and sewage drainage, municipal, industrial and mining, as well as pipelines designed for national key projects. The company's illustrious journey reached a significant milestone on November 6, 2017, when it became the first engineering composite pipeline manufacturer to be listed on the main board in China, marking its status as an industry trailblazer.
With a formidable team of over 200 research and development experts and an impressive portfolio of more than 100 patented innovations, Donghong is at the forefront of technological advancement. The company thrives on its robust infrastructure, including a national enterprise technology center, a CNAS-certified laboratory, an academician expert workstation, and a postdoctoral workstation. Through these esteemed platforms, Donghong is committed to pioneering research in the digital transformation, information technology, and intelligent engineering of pipeline systems, driving the industry forward with unmatched expertise and vision.
Donghong has been a crucial player in executing national strategic initiatives and key livelihood projects. As a leader in the engineering pipeline arena, the company has contributed significantly to monumental projects like the South-to-North Water Diversion, Hanjinwei, and the Beijing-Xinjiang Expressway. Its footprint extends to initiatives under One Belt, One Road, the development of standardized farmland, the integration of urban and rural water supply systems, Liren gas projects, and centralized heating solutions. Through these endeavors, Donghong continues to enhance its reputation as an eminent force in the pipeline engineering industry, focusing on innovation and quality to serve critical national needs.
At Donghong, we pride ourselves on our formidable logistics network founded on strategic alliances with over five elite 5A-level logistics companies. With our extensive expertise spanning many years, we seamlessly blend various transportation modes-be it automobile, railway, or maritime logistics-ensuring unparalleled service regardless of weather conditions or geographical challenges. Our robust transportation strategy guarantees prompt and reliable delivery of each shipment to your doorstep, no matter how remote or demanding the location. Experience the peace of mind that comes with our commitment to swift and efficient delivery.
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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