1. Introducing our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe - a marvel of modern engineering! This extraordinary steel-plastic composite product is renowned for its unparalleled anti-corrosion properties. Meticulously crafted from scrupulously pre-treated steel pipe, it features an inner surface coated with fusion-bonded epoxy powder after heating, while the outer surface is gracefully enveloped in polyethylene powder. Offering a robust and reliable solution for all your pipeline needs, this product stands at the forefront of innovation and quality.
2. Discover the pinnacle of innovation in the water conservancy pipeline industry with our revolutionary product. This pipe sets the gold standard for excellence, seamlessly blending anti-corrosion performance between the pipe body and socket. Its flexible socket ensures a flawless integration of anti-corrosion features and user convenience, making it the top choice in the industry for both efficiency and reliability. Experience unmatched performance and reliability with our cutting-edge solution.
| 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 to perfection, our products are customizable to meet all specific customer requirements with unmatched precision and excellence.
1. Corrosion Resistance
Our Bending Resistant API 5L Pipeline is meticulously engineered with top-tier anti-corrosion materials such as polyethylene and epoxy resin, both celebrated for their incredible corrosion resistance. These advanced polymer materials are expertly designed to shield the pipeline from soil and fluid damage, significantly extending its service life and ensuring robust durability across demanding environments.
2. Excellent Hydraulic Properties
Boasting a smooth inner wall that resists scaling, our pipeline features a low coefficient of friction. This seamless, non-adhesive surface not only amplifies the pipeline's conveying capacity but also minimizes pressure loss and reduces energy consumption for water transmission, guaranteeing efficient and reliable performance.
3. Superior Hygiene Performance
The epoxy resin coating lining the interior of our pipeline provides a smooth, non-scaling surface that is both safe and hygienic. Adhering to the stringent GB/T17219 health standards, the anti-corrosion material effectively prevents water quality contamination, ensuring the delivery of clean and safe water.
4. Exceptional Coating Adhesion
By employing modified epoxy resin and polyethylene powder, our pipeline achieves superior chemical bonding with the metal. The outer layer of polyethylene furnishes exceptional toughness and impact resistance, guarding against scratches from dragging and knocks while even resisting plant root puncture, ensuring long-lasting protection.
5. Extended Lifespan
Engineered for longevity, our anti-corrosion steel pipeline operates reliably for 30 to 50 years under normal construction and usage conditions. This marks a substantial improvement in lifespan compared to conventional steel pipes, delivering enduring value and dependability.
6. Superior Connection Security
Our pipeline supports a variety of connection methods tailored to diverse environments and pressure requirements. Connection options include flanged, quick coupling, butt welding, stainless steel lining, and socket connections. Each method is tried and tested, offering mature and reliable solutions for secure and dependable installations.
1. The ultimate quality of any product is a direct reflection of its process design and manufacturing precision. At Shandong Donghong Pipe Industry Co., Ltd., we utilize cutting-edge equipment and draw from decades of manufacturing expertise to ensure remarkable quality control throughout every critical process. Our unwavering commitment to excellence positions us as a trusted partner, consistently delivering high-quality products that you can depend on.
Acknowledging the rising demand for large-diameter pipelines, Donghong proudly presents our large-diameter anticorrosion steel pipes. Meticulously crafted to adhere to stringent international standards, these pipes offer unmatched quality and durability, solidifying our status as industry leaders.
2. To meet diverse project requirements, Donghong has ingeniously developed various connection methods for large-diameter anticorrosive steel pipes. Our comprehensive offerings include flexible socket connections, butt welding, socket lap welds, ball lap welds, customized bevel forms, and more. Leading the industry, we pioneered the large-diameter socket flexible connection, with socket calibers reaching up to 1.8M, first applied in major Chinese water conservancy projects. We take pride in being trailblazers and leaders in large-diameter steel pipe socket connections in China.
At Donghong, we operate a dedicated factory specializing in large-diameter, high-pressure pipe fittings. Our proficiency extends beyond standard production to bespoke solutions, meticulously tailored to meet specific customer requirements and unique project environments.
Discover Various 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 prestigious city of Qufu, the celebrated hometown of Confucius, in China. Since its inception in 1997, Donghong has evolved into a distinguished manufacturer of engineering pipelines, a trailblazing pipeline engineering service provider, and an eminent general contractor in the pipeline engineering arena. Our core business encompasses four principal categories of functional and bespoke pipelines: rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects. On November 6, 2017, Donghong achieved a monumental milestone by becoming the first engineering composite pipeline manufacturer to be listed on the main board of Shanghai.
Donghong prides itself on an exceptional team of over 200 R&D personnel and the possession of more than 100 patents. Utilizing the resources of the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Postdoctoral Workstation, Donghong excels in the research and development of digitalization, informatization, and intelligent pipeline engineering solutions. We are at the cutting edge of industry advancements, setting new benchmarks and propelling the engineering pipeline industry to new heights.
Donghong plays a pivotal role in national strategic and livelihood projects. Our noteworthy contributions span across initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road, standardized farmland, urban and rural water supply integration, Liren gas, and centralized heating projects. By spearheading the evolution of the engineering pipeline industry, we persistently serve these critical national projects with unwavering commitment and unparalleled excellence.
Donghong has established strategic partnerships with over five prestigious 5A-level logistics companies, leveraging years of unparalleled transportation experience. Our sophisticated network integrates automobile transportation, railway logistics, port handling, and maritime shipping. Whether facing heatwaves or icy conditions, remote locations, or challenging environments, we guarantee exceptional service. Our comprehensive transportation strategy ensures that every shipment reaches your site swiftly and efficiently, embodying our commitment to excellence in delivery.
1. Do your products comply with international standards?
Our products proudly boast certifications from CE, BV, ISO, among others, underscoring their top-notch quality and adherence to global standards. Inform us of the specific national standard you need, and we will conduct the necessary verifications or testing to meet your requirements.
2. What types of services do you offer?
As an industry leader, we provide an extensive array of services that encompass high-caliber pipe products, pipe fittings, and all-inclusive packaging and shipping solutions. Our professional consulting services deliver expert project advice, innovative pipe system solutions, and detailed design recommendations. Furthermore, as an engineering-focused enterprise, we excel in pipeline contracting services, pipe repair services, and offer complimentary maintenance guidance.
3. Do you offer OEM/ODM services?
Absolutely. We specialize in customizations across a spectrum of parameters including material, specifications, logo, packaging, and connection methods. Our proficient team is adept at crafting bespoke solutions tailored to your unique project needs, with a portfolio of numerous successful case studies.
4. What are your payment terms?
We accept payments via T/T (Telegraphic Transfer) or L/C (Letter of Credit) at sight.
5. How do you ensure the quality of your products?
We warmly welcome all customers to visit our facility for an in-person inspection of our products. We also perform stringent tests according to customer specifications before order confirmation. Additionally, we can provide samples prior to bulk production for customer evaluation and approval, ensuring adherence to the highest quality standards.
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