1. Discover the unparalleled excellence of our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe. This innovative steel-plastic composite marvel boasts superior anti-corrosion properties. Crafted meticulously from pre-treated steel pipe, it features an inner surface coated with fusion-bonded epoxy powder after a precise heating process, and an outer surface adorned with polyethylene powder. This dual-layer protection ensures remarkable durability and longevity for your piping needs.
2. Elevate your water conservancy pipeline projects with the epitome of perfection. Our pipe's body and socket anti-corrosion layers provide unmatched consistency and performance. The flexible socket seamlessly integrates with our advanced anti-corrosion technology, delivering the industry's premier solution for both protection and convenience. Experience the best-in-class anti-corrosion method and the most user-friendly connection system available.
| 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: Customization available to meet your specific requirements. Tailor our products to fit your unique needs effortlessly.
1. Corrosion Resistance
Utilizing advanced anti-corrosion materials such as polyethylene and epoxy resin, our Standard Carbon Steel Pipe offers exceptional corrosion resistance. These high-grade polymers effectively shield the pipeline from soil and fluid-induced damage, significantly extending its service life.
2. Excellent Hydraulic Properties
With a smooth inner wall that resists scaling and boasts a low friction coefficient, our pipes ensure optimal conveying capacity. This results in reduced pressure loss and minimized energy consumption during water transmission.
3. Superior Hygiene Performance
The pipeline's inner epoxy resin coating provides a smooth, non-scaling surface that is both safe and hygienic. Meeting the stringent GB/T17219 health standard, it effectively prevents contamination of water quality.
4. Superior Adhesion of Coating
Our modified epoxy resin and polyethylene powder form a robust chemical bond with the metal, ensuring exceptional adhesion. The outer polyethylene layer demonstrates excellent toughness and impact resistance, capable of withstanding dragging, knocks, and plant root punctures.
5. Extended Durability
Designed for longevity, our anti-corrosion steel pipes can reliably serve for 30 to 50 years under standard construction and usage conditions, markedly outlasting ordinary steel pipes.
6. Reliable Connection Security
Offering a variety of connection methods such as flanged, quick coupling, butt welding, stainless steel lining, and socket connections, our pipes are engineered to cater to diverse environmental and pressure requirements. These mature and dependable connections ensure superior security.
1. The ultimate quality of our product is determined by intricate process design and meticulous manufacturing. At Donghong, we leverage state-of-the-art equipment to ensure critical process control and integrate decades of manufacturing expertise. This allows us to deliver premium products and establish ourselves as a reliable and esteemed enterprise.
Recognizing the increasing demand for large-diameter pipelines, Donghong has expanded its product line to include large-diameter anticorrosion steel pipes. These products are crafted to meet and exceed international standards, ensuring top-notch quality and performance.
2. To cater to diverse project requirements, Donghong has innovated various connection methods for large-diameter anticorrosion steel pipes. These include flexible socket connection, butt welding, socket lap weld, ball lap weld, and customized bevel forms, offering a wide array of options for any project. Donghong pioneered the large-diameter socket flexible connection, with the maximum socket diameter reaching up to 1.8 meters. This breakthrough has been successfully implemented in major water conservancy projects across China, positioning Donghong as a trailblazer and leader in the large-diameter steel pipe socket connection industry.
Donghong boasts a dedicated high-pressure pipe fittings factory specializing in the production of large-diameter, high-pressure pipe fittings for various projects. Additionally, we offer customization services to adapt pipe fittings to specific customer requirements and unique project environments.
Exploring Other Connection Methods
| Socket type connection |
Flange Connection |
Clamp Connection |
AboutUs
Donghong (Shandong Donghong Pipe Industry Co., Ltd.), abbreviated as Donghong (stock code: 603856), is proudly headquartered in the culturally rich hometown of Confucius - Qufu, China. Established in 1997, Donghong has risen as a leading manufacturer of engineering pipelines, a dedicated pipeline engineering service provider, and a general contractor specializing in pipeline engineering projects. Our core business segments include four primary types of functional and customized pipelines: rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects. On November 6, 2017, Donghong distinguished itself by being listed on the main board of Shanghai, becoming the first main board-listed engineering composite pipeline manufacturer in China.
Donghong is at the forefront of innovation with over 200 R&D personnel and more than 100 patents. Leveraging national enterprise technology centers, CNAS-accredited laboratories, academician expert workstations, and postdoctoral workstations, Donghong delves deep into the digitalization, informatization, and intelligent advancement of pipeline engineering. We are committed to leading the evolution of the engineering pipeline industry.
Donghong proudly contributes to national key strategic projects and vital livelihood programs. As a leader in the engineering pipeline sector, we have been pivotal in significant initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, the Belt and Road Initiative, standardized farmland development, urban and rural water supply integration, Liren gas projects, centralized heating systems, and many more.
Donghong has established strategic partnerships with over five 5A-level logistics companies, boasting extensive experience in comprehensive transportation. Our logistics network integrates automobile, railway, port, and shipping solutions, ensuring unparalleled service regardless of weather conditions, remoteness, or challenging environments. Our holistic approach guarantees that every shipment reaches your site promptly and efficiently.
1. Does your product meet international standards?
Our products are rigorously tested and have passed CE, BV, ISO, and WAR certifications, exceeding standard requirements. Feel free to specify any national standard you need, and we will verify or test it accordingly for you.
2. What services do you offer?
As a manufacturing factory, we offer pipe products, fittings, packaging, and shipping services. As a professional consultancy, we provide project consulting, pipe system solutions, and design advice. Additionally, as an engineering-focused enterprise, we offer pipeline contracting, repair services, and free maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we provide customization in material, specifications, logos, packaging, and connection methods. Our expert team also offers project-specific solutions, with 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 goods?
We warmly invite all customers to visit our company and inspect our products firsthand. We can also conduct strict tests as per your requirements before order placement. Additionally, we can send samples for your own testing to ensure product quality before commencing bulk production.
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