1. Our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe represents the pinnacle of steel-plastic composite technology. This innovative product features anti-corrosion properties, crafted from meticulously pre-treated steel pipes. The inner surface is fortified with fusion-bonded epoxy powder after precise heating, while the outer surface is protected with a robust polyethylene powder coating. This dual-layer protection ensures maximum durability and longevity.
2. A Revolutionary Water Conservancy Pipeline Solution: This pipe is heralded as the ultimate product within the water conservancy pipeline sector. Its body and socket feature a consistent anti-corrosion layer, delivering unmatched protection. The flexible socket seamlessly integrates with the anti-corrosion coating, offering the dual benefit of superior corrosion resistance and the most convenient connection method in the industry today.
| 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 your specific requirements.
1. Corrosion Resistance
Our anti-corrosion materials, including polyethylene and epoxy resin, are advanced polymers with outstanding corrosion resistance, effectively shielding the pipeline from soil and fluid damage. This significantly extends the pipeline's service life.
2. Excellent Hydraulic Properties
With a smooth inner wall that resists scaling and a low coefficient of friction, our pipes ensure optimal conveying capacity. The non-adhesive properties further reduce pressure loss and minimize water transmission energy consumption.
3. Superior Hygiene Performance
The epoxy resin coated inner surface is smooth and resists scaling, meeting GB/T17219 health standards for safety and hygiene. This ensures the pipeline does not contaminate the water quality, maintaining it pure and safe.
4. Superior Coating Adhesion
Modified epoxy resin and polyethylene powder form strong chemical bonds with the metal, ensuring robust adhesion. The outer polyethylene layer offers excellent toughness and impact resistance, preventing damage from dragging, knocking, and plant root punctures.
5. Extended Lifespan
Our anti-corrosion steel pipes can last 30 to 50 years under normal construction and usage conditions, greatly surpassing the lifespan of ordinary steel pipes.
6. Secure Connections
Multiple connection methods are available to suit various environments and pressure requirements. Options include flanged, quick coupling, butt welding, stainless steel lining, and socket connections. Each method ensures mature and reliable connectivity.
1. The final quality of the product is determined by the process design and manufacturing precision. At Donghong, we leverage sophisticated equipment and years of expertise to ensure key process control, delivering high-quality products. Our dedication to excellence makes us a trustworthy enterprise.
In response to the increasing demand for large-diameter pipelines, Donghong has introduced large-diameter anticorrosion steel pipes that meet international standards, offering first-class products to our discerning customers.
2. To cater to diverse project requirements, Donghong has developed various connection methods for large-diameter anticorrosive steel pipes. These include flexible socket connections, butt welding, socket lap weld, ball lap weld, customized bevel forms, and other connection options. Notably, we pioneered the large-diameter socket flexible connection, achieving a maximum socket caliber of 1.8M, which was first utilized in key water conservancy projects in China. This innovation positions us as leaders in large-diameter steel pipe socket connections.
Donghong boasts a specialized factory for large-diameter, high-pressure pipe fittings, tailored for various projects. We also offer customization services to meet specific customer requirements and project environments, ensuring optimal performance and satisfaction.
Other connection methods.
| Socket type connection |
Flange Connection |
Clamp Connection |
Aboutus
Donghong(Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) is headquartered in the illustrious hometown of Confucius - Qufu, China. Established in 1997, Donghong has evolved into a premier manufacturer of engineering pipelines, a comprehensive pipeline engineering service provider, and a distinguished general contractor for pipeline engineering projects. Our core offerings encompass four major categories of functional and customized pipelines: rainwater and sewage drainage, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects. On November 6, 2017, Donghong achieved a milestone by being listed on the main board of Shanghai, marking its distinction as China's first main board-listed engineering composite pipeline manufacturer.
Donghong boasts an impressive team of over 200 R&D personnel and holds more than 100 patents. Leveraging national technology research and development platforms such as the National Enterprise Technology Center, the National CNAS Laboratory, the Academician Expert Workstation, and the Postdoctoral Workstation, Donghong pioneers advancements in the digitalization, informatization, and intelligence of pipeline engineering, steering the future of the industry.
Our company is dedicated to supporting national key strategic and livelihood projects. By spearheading the development of the engineering pipeline industry, Donghong contributes to major initiatives including the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road, standardized farmland development, integration of urban and rural water supply, Liren gas, centralized heating, and many more.
Donghong has established strategic partnerships with over five elite 5A-level logistics companies, boasting extensive years of transportation expertise. By integrating automobile, railway, port, and shipping logistics, we ensure unparalleled service in any climate, whether in sweltering heat or freezing cold, across remote or challenging terrains. Our all-encompassing transportation strategy guarantees prompt delivery of every shipment directly to the customer's site, ensuring efficiency and reliability at every step.
1. Does your product meet international standards?
Our products have passed rigorous certifications, including CE, BV, ISO, and the Wars certificate. All our specifications exceed standard requirements. Feel free to inform us of the specific national standard you need; we are ready to verify or test it for you.
2. What types of services do you offer?
As a manufacturing factory, we provide high-quality pipe products and fittings, along with packaging and shipping services. As a professional consultation company, we offer comprehensive project consulting, pipe system solutions, and design recommendations. As an engineering-focused enterprise, we also provide pipeline contracting, repair services, and free maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely! We offer customization in materials, specifications, logos, packaging, and connection methods. Additionally, our expert team can provide tailored solutions for your specific projects, backed by our track record of successful case studies.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How can you guarantee the quality of your products?
We warmly welcome all customers to visit our facility and inspect our products firsthand. We can also conduct rigorous tests per customer requirements before the order. Additionally, we can dispatch samples for customer testing to ensure product quality before bulk production.
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