1. Introducing the Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe: a pinnacle in steel-plastic composite engineering. This marvel of innovation boasts unparalleled anti-corrosion properties, crafted from meticulously pre-treated steel. The inner surface features a fusion-bonded epoxy powder coating, while the outer surface is enveloped in resilient polyethylene powder, ensuring robust protection from both the inside and out.
2. This product stands as the epitome of excellence within the water conservancy pipeline industry. Its pipe body and socket feature a uniform anti-corrosion layer, ensuring seamless performance. The flexible socket, combined flawlessly with superior anti-corrosion technology, represents the industry's finest methodology. Not only does it offer unmatched anti-corrosion benefits, but it also guarantees the most convenient and efficient connection process 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 |
Please Note: Customization options are available to cater to specific customer requirements.
1. Unmatched Corrosion Resistance
Our steel pipes are fortified with advanced anti-corrosion materials like polyethylene and epoxy resin. These high-performance polymers offer exceptional resistance to corrosion, effectively shielding the pipes from soil and fluid damage, thereby significantly extending their service life.
2. Superior Hydraulic Properties
Featuring a smooth inner wall that resists scaling, our pipes boast a low friction coefficient. This ensures optimal conveyance capacity, minimizing pressure loss and reducing energy consumption for water transmission.
3. Exceptional Hygiene Standards
The epoxy resin coating inside our pipes provides a smooth, non-scaling surface that is both safe and hygienic. Complying with the stringent GB/T17219 health standard, this coating effectively prevents water contamination, ensuring the purity of the transported water.
4. Superior Coating Adhesion
Adopting modified epoxy resin and polyethylene powder, our pipes form a robust chemical bond with the metal, resulting in strong adhesion. The outer polyethylene layer offers excellent toughness and impact resistance, withstanding scratches, knocks, and even plant root punctures.
5. Extended Service Life
Engineered for longevity, our anti-corrosion steel pipes can reliably serve for 30 to 50 years under standard construction and usage conditions, markedly outlasting conventional steel pipes.
6. Secure and Versatile Connections
Our pipes offer a variety of connection methods to suit diverse environments and pressure requirements, including flanged, quick coupling, butt welding, stainless steel lining, and socket connections. These mature and reliable connection techniques ensure secure and efficient installation.
1. The ultimate quality of our products is a direct result of meticulous process design and advanced manufacturing practices. At Donghong, we utilize state-of-the-art equipment for precise quality control at every critical stage. Coupled with decades of manufacturing expertise, we deliver superior products that establish us as a reliable and trustworthy enterprise.
To address the rising demand for large-diameter pipelines, Donghong has expanded its offerings to include high-grade, large-diameter anticorrosion steel pipes that meet international standards, ensuring top-tier performance and durability.
2. Catering to a variety of project requirements, Donghong has innovated multiple connection methods for large-diameter anticorrosive steel pipes. Options include flexible socket connections, butt welding, socket lap welds, ball lap welds, customized bevel forms, and more. Notably, Donghong pioneered the large-diameter socket flexible connection with a maximum socket caliber of 1.8M, first implemented in key water conservancy projects in China. This innovation positions us as industry leaders in large-diameter steel pipe socket connections.
Donghong also operates a factory dedicated to producing large-diameter, high-pressure pipe fittings. This facility not only supplies standard fittings but also specializes in customizing unique pipe fittings tailored to specific customer requirements and project environments.
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 is a premier manufacturer and service provider in the engineering pipeline industry, as well as a general contractor for pipeline engineering projects. Specializing in four major categories of functional and customized pipelines-rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects-Donghong has built a robust portfolio. A momentous milestone was achieved on November 6, 2017, when Donghong was listed on the main board of Shanghai Stock Exchange, making it the first engineering composite pipeline manufacturer in China to attain this prestigious status.
Donghong boasts a formidable team of over 200 dedicated R&D professionals and holds more than 100 patents. The company's R&D capabilities are bolstered by its national enterprise technology center, CNAS-accredited laboratory, academician expert workstation, and postdoctoral workstation. These cutting-edge research platforms empower Donghong to advance the digitalization, informatization, and intelligence of pipeline engineering, thus steering the entire industry towards innovation and growth.
Actively engaged in national key strategic and livelihood projects, Donghong continues to lead the engineering pipeline industry. The company has been instrumental in a series of critical initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road, standardized farmland development, urban and rural water supply integration, Liren gas projects, centralized heating systems, and more. Through these endeavors, Donghong exemplifies its commitment to both national development and public welfare.
Donghong has established strategic partnerships with over five premier 5A-level logistics companies, leveraging years of unparalleled transportation expertise. Whether it's automotive transport, railway logistics, or port and shipping solutions, we seamlessly integrate various modes to deliver exceptional service. Regardless of extreme heat, biting cold, or challenging and remote regions, rest assured that our robust and comprehensive transportation strategy ensures that every shipment reaches your site promptly and efficiently.
1. Does your product meet international standards?
Our products have passed CE, BV, ISO, and WARS certifications, with all parameters surpassing standard requirements. Please feel free to inform us of the national standard you need; we will verify and test it accordingly.
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 consulting company, we offer project consultancy, pipe system solutions, and design recommendations. As an engineering-focused enterprise, we additionally provide pipeline contracting, pipe repair services, and free maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely, we offer comprehensive customization options in material, specifications, logos, packaging, and connection methods. Our expert team can also provide tailored solutions for your specific projects, with numerous successful cases to our credit.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How can you guarantee the quality of the goods you offer?
We warmly invite all customers to visit our company and inspect our goods firsthand. We can also conduct rigorous tests as per customer requirements before order placement. Additionally, we can send samples before bulk production for customers to perform their own quality tests.
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