1. Inner epoxy resin outer polyethylene coated composite steel pipe is an advanced steel-plastic composite product designed with exceptional anti-corrosion properties. Crafted from expertly pre-treated steel pipes as the base, this pipe features a robust inner surface coated with fusion bonded epoxy powder after precise heating. The exterior is elegantly finished with a durable polyethylene powder coating, ensuring superior protection and longevity.
2. This is the most exemplary product in the water conservancy pipeline industry. It boasts consistent performance in both the pipe body and socket anti-corrosion layer. The innovative flexible socket harmonizes perfectly with the anti-corrosion layer, combining the industry's leading anti-corrosion techniques with the utmost convenience in connection. This pipe sets the standard for excellence and ease of use.
| 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 is available to meet customer-specific requirements.
1. Corrosion resistance
Our API 5L Welded Steel Pipeline Supplier boasts exceptional corrosion resistance due to the use of anti-corrosion materials such as polyethylene and epoxy resin. These advanced polymer materials offer unparalleled protection against soil and fluid-induced damages, significantly extending the pipeline's service life.
2. Excellent hydraulic properties
Designed with a smooth inner wall, our pipeline minimizes scaling with its low friction coefficient. The non-adhesive properties ensure optimal conveying capacity, reducing both pressure loss and energy consumption in water transmission.
3. Good hygiene performance
Featuring an epoxy resin coating, the interior surface of our pipeline remains smooth and hygienic, meeting GB/T17219 health standards. This design effectively prevents contamination, ensuring the purity of water quality throughout its use.
4. Superior adhesion of coating
With modified epoxy resin and polyethylene powder, our pipeline forms a robust chemical bond with the metal. The outer polyethylene layer offers excellent toughness and impact resistance, safeguarding against scratches, impacts, and plant root punctures.
5. Long life
Under normal construction and usage conditions, our anti-corrosion steel pipe delivers an impressive lifespan of 30 to 50 years, far surpassing that of ordinary steel pipes.
6. Good connection security
Our pipeline supports various connection methods to accommodate diverse environments and pressure requirements. Options include flanged, quick coupling, butt welding, stainless steel lining, and socket connections, all of which are mature and reliable.
1. The exceptional quality of our products is determined by precise process design and meticulous manufacturing protocols. At Shandong Donghong Pipe Industry Co., Ltd., we leverage advanced equipment for critical quality control and integrate years of manufacturing expertise. This ensures the delivery of premium products to our clients, solidifying our reputation as a reliable and trustworthy enterprise.
To meet the escalating demand for large-diameter pipelines, Shandong Donghong Pipe Industry Co., Ltd. has introduced large-diameter anti-corrosion steel pipes that adhere to the highest international standards, providing unparalleled quality and reliability.
2. Addressing diverse project requirements, we have innovated various connection methodologies for large-diameter anti-corrosion steel pipes. These include flexible socket connections, butt welding, socket lap welding, ball lap welding, custom bevel forms, and more. We were pioneers in developing the large-diameter flexible socket connection, with a maximum caliber of 1.8 meters, first utilized in significant water conservancy projects in China. This landmark achievement establishes us as leaders in large-diameter steel pipe socket connections.
Shandong Donghong Pipe Industry Co., Ltd. boasts a state-of-the-art facility for producing large-diameter, high-pressure pipe fittings tailored to specific project needs. We also offer bespoke pipe fittings custom-designed to meet the unique requirements of our clients and their project environments.
Additional Connection Methods
| Socket type connection |
Flange Connection |
Clamp Connection |
About Us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.), abbreviated as Donghong and listed with the stock code 603856, proudly stands at the heart of Qufu, China-the hometown of Confucius. Established in 1997, Donghong has flourished into a premier manufacturer, service provider, and general contractor for engineering pipelines. Our diverse portfolio includes essential and customizable pipeline solutions such as rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects. Our landmark achievement came on November 6, 2017, when we became the first engineering composite pipeline manufacturer listed on the main board of Shanghai.
With a formidable team of over 200 R&D professionals and a rich portfolio of more than 100 patents, Donghong is at the forefront of innovation. Leveraging national research frameworks such as the National Enterprise Technology Center, CNAS laboratory, academician expert workstation, and postdoctoral workstation, we are pioneering advancements in the digitalization, informatization, and intelligence of pipeline engineering, thereby setting industry benchmarks.
Donghong is committed to driving the advancement of engineering pipeline solutions for both national strategic projects and essential livelihood initiatives. We proudly contribute to prominent endeavors such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and One Belt, One Road initiatives. Our expertise also extends to standardized farmland, integrated urban and rural water supply systems, Liren gas, centralized heating projects, and more, thus addressing critical infrastructure needs with unparalleled expertise and dedication.
Donghong has forged powerful alliances with over five top-tier, 5A-level logistics giants. With years of unmatched expertise in transportation, we harmonize automobile transport, railway networks, port operations, and maritime shipping into a seamless delivery system. Whether faced with scorching heat or biting cold, and no matter how remote or challenging the destination, we guarantee unparalleled service. Our all-encompassing transportation strategy ensures that every shipment reaches your site swiftly and securely, fulfilling our commitment to excellence in logistics.
1. Does your product meet international standards?
Our products have passed CE, BV, ISO, and WAR certificates, with all indicators surpassing standard requirements. Feel free to inform us of the specific national standard you require, and we will verify or test it for you.
2. What kind of services do you offer?
As a manufacturing factory, we provide pipe products, pipe fittings, packaging, and shipping services. As a professional consulting company, we offer project consulting, pipe system solutions, and design suggestions. Additionally, as an engineering-focused enterprise, we provide pipeline contractor services, pipe repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely! We offer customization in materials, specifications, logos, packaging, connection methods, and more. Our professional team can also provide tailored solutions for your specific projects, with many successful cases showcasing our expertise.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How can you guarantee the quality of your goods?
We warmly welcome all customers to visit our company and inspect our goods firsthand. We can also conduct rigorous tests as per your requirements before you place an order. Additionally, before bulk production, we can dispatch samples for your independent testing to ensure product quality.
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