1. Introducing our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe - a marvel of engineering! This premium steel-plastic composite product boasts exceptional anti-corrosion properties. Crafted from meticulously pre-treated steel pipe, it features an inner surface exquisitely coated with fusion-bonded epoxy powder after precise heating, and an outer surface elegantly enveloped in resilient polyethylene powder. This results in a robust, long-lasting, and reliable solution for all your stringent pipeline needs.
2. Discover the pinnacle of innovation in the water conservancy pipeline industry with our groundbreaking product. This pipe sets the gold standard for excellence, offering a seamless blend of unparalleled anti-corrosion performance between the pipe body and socket. Its highly flexible socket ensures a flawless amalgamation of top-tier anti-corrosion features and user convenience, making it the industry's premier choice for unmatched 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, with customizable features to meet all specific customer requirements.
1. Unrivaled Corrosion Resistance
Our Bending Resistant API 5L Pipeline is engineered with high-quality anti-corrosion materials, including polyethylene and epoxy resin. These premium coatings are renowned for their exceptional ability to guard against corrosion. Carefully designed to protect the pipeline from both soil and fluid damage, these advanced polymer materials dramatically extend the service life of the pipeline, ensuring unparalleled durability and performance.
2. Optimal Hydraulic Properties
Our pipeline features a meticulously smooth inner wall that prevents scaling and boasts a low coefficient of friction. This frictionless, non-adhesive surface significantly enhances the pipeline's conveying capacity, minimizes pressure drops, and reduces energy consumption during water transmission, guaranteeing efficient and dependable performance.
3. Supreme Hygiene Standards
The interior epoxy resin coating of our pipeline provides a smooth, non-scaling surface that is both safe and hygienic. Compliant with GB/T17219 health standards, this anti-corrosion material effectively prevents any contamination of water quality, ensuring the delivery of clean and safe water consistently.
4. Exceptional Coating Adhesion
Our pipeline employs modified epoxy resin and polyethylene powder to form robust chemical bonds with the metal, resulting in exceptional adhesion. The outer polyethylene layer is remarkably tough and impact-resistant, protecting the pipeline from scratches due to dragging, knocks, and even plant root punctures.
5. Prolonged Lifespan
Designed with longevity in mind, our anti-corrosion steel pipeline can reliably function for 30 to 50 years under standard construction and usage conditions. This significant extension in lifespan compared to ordinary steel pipes translates to long-term value and dependable performance.
6. Enhanced Connection Security
Our pipeline offers a variety of connection methods to meet diverse environmental and pressure requirements. Choices include flanged, quick coupling, butt welding, stainless steel lining, and socket connections. Each method is well-proven, 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 that consistently earn your trust.
Recognizing the surging demand for large-diameter pipelines, Donghong proudly introduces our robust large-diameter anticorrosion steel pipes. Crafted to meet stringent international standards, these pipes promise unparalleled quality and durability, firmly positioning us as the industry leaders you can depend on.
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 proud to be trailblazers and leaders in large-diameter steel pipe socket connections in China.
At Donghong, we house a dedicated factory specializing in large-diameter, high-pressure pipe fittings. Our unparalleled expertise not only covers standard production but also extends to bespoke solutions, meticulously tailored to meet specific customer requirements and unique project environments.
Discover a Variety of 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. Founded in 1997, Donghong has risen to prominence as a premier manufacturer of engineering pipelines, a pioneering pipeline engineering service provider, and a leading general contractor in the pipeline engineering sector. Our core business spans four major categories of specialized and custom pipelines: rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for critical national projects. On November 6, 2017, Donghong proudly became the first engineering composite pipeline manufacturer to be listed on the main board of the Shanghai Stock Exchange.
Donghong boasts an exceptional team of over 200 R&D personnel and holds more than 100 patents. Leveraging the cutting-edge resources of the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Postdoctoral Workstation, Donghong excels in the research of digitalization, informatization, and intelligence within pipeline engineering. We are at the vanguard of industry development, setting new benchmarks and advancing the engineering pipeline industry.
Donghong stands as a pivotal player in national strategic and livelihood projects. We have made substantial contributions to monumental 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 development of the engineering pipeline industry, we continue to serve these crucial national projects with unwavering dedication and distinction.
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. Our approach is meticulously designed to handle the nuances of various logistical challenges, ensuring that our clients receive their products in pristine condition, anywhere in the world, on time, every time.
1. Do your products meet international standards?
Our products have excelled in obtaining CE, BV, ISO, and several other prestigious certifications, underscoring their superior quality and full compliance with global standards. Please inform us of the specific national standard you require, and we will conduct the necessary verifications or tests to ensure alignment.
2. What kinds of services do you offer?
As a premier manufacturer, we pride ourselves on offering an extensive range of services, including the supply of top-tier pipe products, comprehensive pipe fittings, and all-encompassing packaging and shipping solutions. Our professional consulting services are designed to provide expert project advice, innovative pipe system solutions, and bespoke design recommendations. As a company with a strong engineering focus, we also excel in delivering superior pipeline contracting services, meticulous pipe repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely! We excel in offering customization across various parameters, including material selection, specifications, logo design, packaging, and connection methods. Our skilled team is adept at delivering tailored solutions specific to your projects, backed by numerous successful case studies that demonstrate our expertise.
4. What are your terms of payment?
We accept T/T (Telegraphic Transfer) or L/C (Letter of Credit) at sight.
5. How can you guarantee the quality of your products?
We warmly invite all customers to visit our state-of-the-art facility for a firsthand inspection of our products. We also perform stringent tests as per customer specifications before confirming any order. Additionally, we offer sample dispatch prior to bulk production for customer testing and approval, ensuring we consistently meet the highest quality standards.
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