1. The Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe is an innovative, corrosion-resistant steel-plastic composite product. Crafted from pre-treated steel pipes, it boasts an interior layer of fusion-bonded epoxy powder, meticulously applied after heating. The exterior is enveloped in durable polyethylene powder, ensuring robust protection and longevity.
2. This is the pinnacle of excellence in the water conservancy pipeline industry. The pipe body and socket's anti-corrosion layers are expertly designed for consistent performance. The flexible socket pairs seamlessly with the superior anti-corrosion features, making it not only the most effective but also the most user-friendly connection method in the industry.
| 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: Customizable to meet specific customer requirements.
1. Corrosion Resistance
Crafted using advanced anti-corrosion materials like polyethylene and epoxy resin, this pipeline boasts unparalleled resistance to corrosion. These polymer materials protect against both soil and fluid-induced damage, drastically extending the pipeline's service life.
2. Exceptional Hydraulic Properties
Featuring a smooth inner wall that minimizes scaling and friction, this pipeline ensures optimal conveyance capacity. Its non-adhesive surface reduces pressure loss and energy consumption during water transmission, making it an efficient choice.
3. Superior Hygiene Performance
The epoxy resin coating inside the pipeline is not only smooth and resistant to scaling but also safe and hygienic. Compliant with GB/T17219 health standards, this material prevents any contamination of the water quality, ensuring clean and safe water delivery.
4. Outstanding Coating Adhesion
Modified epoxy resin and polyethylene powder form a robust chemical bond with the metal, ensuring strong adhesion. The outer polyethylene layer offers excellent toughness and impact resistance, protecting against scratches, knocks, and plant root punctures.
5. Extended Lifespan
With proper construction and usage, this anti-corrosion steel pipe can last between 30 to 50 years, significantly outlasting ordinary steel pipes. It promises a long-term, reliable solution for various applications.
6. Secure Connection Options
Designed to meet diverse environmental and pressure requirements, this pipeline supports multiple connection methods such as flanging, quick coupling, butt welding, stainless steel lining, and socket connection. Each method is mature and reliable, ensuring secure connections every time.
1. The ultimate quality of our products is a direct reflection of our meticulous process design and advanced manufacturing techniques. At Donghong, we are equipped with state-of-the-art machinery that ensures key process control, combined with our extensive years of manufacturing expertise. This enables us to deliver superior products, establishing us as a trustworthy enterprise that you can rely on for excellence.
Recognizing the increasing demand for large-diameter pipelines, Donghong has expanded its offerings to include large-diameter anticorrosion steel pipes. These products are crafted to meet and exceed international standards, ensuring first-class quality and reliability.
2. To cater to the diverse requirements of various projects, Donghong has innovated multiple connection methods for large-diameter anticorrosive steel pipes. These include flexible socket connections, butt welding, socket lap welds, ball lap welds, customized bevel forms, and more. Notably, we pioneered the large-diameter socket flexible connection, with a maximum socket caliber of up to 1.8 meters. This groundbreaking connection method has been adopted in key water conservancy projects across China, positioning us as the leaders and innovators in large-diameter steel pipe socket connections.
Donghong boasts a specialized factory dedicated to the production of large-diameter, high-pressure pipe fittings. We not only manufacture these critical components for various projects but also offer customization services to meet specific customer requirements and project environments, ensuring tailored solutions for every need.
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 historic and culturally rich hometown of Confucius - Qufu, China. Established in 1997, Donghong has grown into a prominent manufacturer of engineering pipelines, a provider of comprehensive pipeline engineering services, and a general contractor for pipeline engineering projects. We specialize in four major categories of functional and customized pipelines: rainwater and sewage drainage, municipal infrastructure, industrial and mining applications, and pipelines for national key projects. On November 6, 2017, Donghong proudly became the first engineering composite pipeline manufacturer in China to be listed on the main board of Shanghai Stock Exchange.
Donghong boasts a robust team of over 200 R&D personnel and holds more than 100 patents. Through leveraging our national enterprise technology center, CNAS laboratory, academician expert workstation, and postdoctoral workstation, we are at the forefront of research in the digitalization, informatization, and intelligence of pipeline engineering. These efforts underscore Donghong's leadership in advancing the engineering pipeline industry.
We actively participate in and contribute to numerous national key strategic projects and livelihood initiatives. Our engineering pipelines play a critical role in significant undertakings such as the South-to-North Water Diversion, Hanjinwei Project, Beijing-Xinjiang Expressway, and the One Belt, One Road initiative. Additionally, we support the development of standardized farmland, the integration of urban and rural water supply, Liren gas projects, and centralized heating systems, thereby enhancing the quality of life.
Donghong has established strategic partnerships with over five top-tier 5A-level logistics companies, backed by years of unparalleled transportation expertise. Whether you're looking at automobile, railway, port, or shipping logistics, we seamlessly integrate multiple modes of transport to cater to your needs. Regardless of extreme weather conditions or remote and challenging areas, we pledge to deliver unparalleled service. Our comprehensive and robust transportation strategy ensures that every shipment reaches the customer site swiftly and efficiently, guaranteeing satisfaction every step of the way.
1. Do your products meet international standards?
Our products have passed CE, BV, ISO, and WARS certifications, consistently exceeding standard requirements. Please inform us of any specific national standards you require, and we will verify or test accordingly to ensure compliance.
2. What type of services do you offer?
As a manufacturing factory, we provide high-quality pipe products and fittings, packaging, and shipping services. As a professional consulting firm, we deliver expert project consulting, pipe system solutions, and design recommendations. Additionally, as an engineering-focused enterprise, we offer comprehensive pipeline contracting and repair services, along with free maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer extensive customization options, including material, specifications, logos, packaging, connection methods, and more. Our expert team provides tailored solutions for specific projects and has a proven track record of successful implementations.
4. What are your payment terms?
We accept T/T or L/C at sight.
5. How can you guarantee the quality of your products?
We invite all customers to visit our facilities and inspect our products firsthand. We can also conduct rigorous testing as per customer requirements before orders are placed. Additionally, we offer sample dispatch for pre-production testing to ensure the highest quality standards.
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