1. Introducing our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe - a marvel of engineering! This steel-plastic composite product boasts exceptional anti-corrosion properties. Crafted from meticulously pre-treated steel pipe, it features an inner surface coated with fusion-bonded epoxy powder after heating, and an outer surface elegantly enveloped in polyethylene powder. A robust and reliable solution for all your pipeline needs.
2. Discover the pinnacle of innovation in the water conservancy pipeline industry with our product. This pipe sets the standard for excellence, offering a seamless blend of anti-corrosion performance between the pipe body and socket. Its flexible socket ensures a flawless combination of anti-corrosion features and convenience, making it the industry's top choice for both efficiency and reliability.
| 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, customizable to meet all customer requirements.
1. Corrosion Resistance
Our Bending Resistant API 5L Pipeline is crafted with premium anti-corrosion materials such as polyethylene and epoxy resin, both renowned for their exceptional corrosion resistance. These advanced polymer materials are meticulously designed to shield the pipeline from soil and fluid damage, significantly extending the pipeline's service life and ensuring robust durability.
2. Excellent Hydraulic Properties
Featuring a smooth inner wall that resists scaling, our pipeline boasts a low coefficient of friction. This smooth, non-adhesive surface enhances the pipeline's conveying capacity, minimizes pressure loss, and reduces energy consumption for water transmission, guaranteeing efficient and reliable performance.
3. Superior Hygiene Performance
The epoxy resin coating on the interior of the pipeline offers a smooth, non-scaling surface that is both safe and hygienic. Complying with GB/T17219 health standards, the anti-corrosion material effectively prevents water quality contamination, ensuring clean and safe water delivery.
4. Exceptional Coating Adhesion
Utilizing modified epoxy resin and polyethylene powder, our pipeline forms strong chemical bonds with the metal, ensuring excellent adhesion. The outer polyethylene layer provides superb toughness and impact resistance, protecting against scratches from dragging and knocks, and even resisting plant root puncture.
5. Extended Lifespan
Designed for longevity, our anti-corrosion steel pipeline can perform reliably for 30 to 50 years under normal construction and usage conditions. This represents a significant improvement in lifespan compared to ordinary steel pipes, offering long-term value and unwavering reliability.
6. Superior Connection Security
Our pipeline offers diverse connection methods to suit various environments and pressure requirements. Options include flanged, quick coupling, butt welding, stainless steel lining, and socket connections. Each connection method is well-established, providing mature and reliable solutions for secure and dependable installations.
1. The final quality of any product is a testament to its process design and manufacturing precision. At Shandong Donghong Pipe Industry Co., Ltd., we leverage state-of-the-art equipment and decades of manufacturing expertise to ensure exceptional quality control throughout critical processes. Our unwavering commitment to excellence makes us a reliable partner, delivering high-quality products you can trust.
Recognizing the surging demand for large-diameter pipelines, Donghong proudly introduces our large-diameter anticorrosion steel pipes. Crafted to meet stringent international standards, these pipes promise unparalleled quality and durability, positioning us at the forefront of the industry as leaders in innovative pipeline solutions.
2. To cater to diverse project requirements, Donghong has innovatively developed multiple connection methods for large-diameter anticorrosive steel pipes. Our offerings include flexible socket connections, butt welding, socket lap welds, ball lap welds, customized bevel forms, and more. Pioneering the industry, we introduced the large-diameter socket flexible connection, with socket calibers up to 1.8M, first implemented in major Chinese water conservancy projects. We are trailblazers and leaders in large-diameter steel pipe socket connections in China, setting new benchmarks in the industry.
At Donghong, we operate a dedicated factory specializing in large-diameter, high-pressure pipe fittings. Our expertise extends beyond standard production to encompass bespoke solutions tailored to meet specific customer requirements and unique project environments. We are committed to delivering precision-engineered products that exceed expectations.
Explore Our Innovative Connection Methods
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) is headquartered in the illustrious city of Qufu, the birthplace of Confucius, China. Since our inception in 1997, Donghong has emerged as a premier manufacturer of engineering pipelines, a pioneering provider of comprehensive pipeline engineering services, and a leading general contractor in the pipeline engineering sector. Our core business spans four major categories of specialized and high-performance pipelines: rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects. Notably, on November 6, 2017, Donghong became the first engineering composite pipeline manufacturer to achieve a listing on the main board of the Shanghai Stock Exchange.
Donghong's R&D division is formidable, comprising over 200 dedicated personnel and holding an impressive portfolio of more than 100 patents. Utilizing the cutting-edge resources of the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and a Postdoctoral Workstation, Donghong excels in the research and development of digitalization, informatization, and intelligence within pipeline engineering. Our relentless pursuit of innovation ensures that we remain at the forefront of industry advancements, setting new benchmarks and propelling the engineering pipeline sector forward.
Donghong is a pivotal contributor to national strategic and livelihood projects. We have played integral roles in landmark 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, Donghong continues to support these critical national endeavors with unwavering commitment and exceptional quality.
Donghong has established strategic partnerships with over five prestigious 5A-level logistics companies, leveraging years of unparalleled transportation experience. Our sophisticated network seamlessly integrates automobile transportation, railway logistics, port handling, and maritime shipping. Whether facing scorching heatwaves or freezing icy conditions, navigating remote locations or challenging environments, we guarantee exceptional service. Our comprehensive and robust transportation strategy ensures that every shipment reaches your site swiftly and efficiently, embodying our steadfast commitment to excellence in delivery.
1. Does your product meet international standards?
Our products have achieved prestigious certifications including CE, BV, and ISO, highlighting our commitment to superior quality and full compliance with international standards. If you have a specific national standard in mind, kindly inform us, and we will ensure verification or conduct necessary testing to assure compatibility.
2. What kind of service do you offer?
As a premier manufacturer, we provide an extensive suite of services encompassing high-quality pipe products, pipe fittings, and meticulous packaging and shipping solutions. Additionally, our professional consulting team offers expert project advice, innovative pipe system solutions, and bespoke design recommendations. As an engineering-centric enterprise, we excel in delivering exceptional pipeline contracting services, reliable pipe repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely! We excel in providing customized solutions across various parameters such as material, specifications, logo, packaging, and connection methods. Our team of experts is adept at formulating tailor-made solutions for your unique projects, backed by numerous 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 the goods you offer?
We warmly welcome all customers to visit our facility for an in-person inspection of our products. We also perform rigorous testing in accordance with customer requirements before order confirmation. Furthermore, we can provide samples prior to bulk production for customer testing and approval, ensuring our products meet the highest quality standards.
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