The Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe stands as a marvel of modern engineering. This steel-plastic composite pipe boasts exceptional anti-corrosion properties, meticulously crafted using a pre-treated steel pipe as its foundation. The inner surface is flawlessly coated with fusion-bonded epoxy powder after precise heating, while the outer surface gleams with a robust layer of polyethylene powder. This innovative coating duo ensures maximum durability and protection, making it an ideal choice for projects demanding resilience and longevity.
| 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: Designed with flexibility in mind, this product can be tailor-fitted to meet specific customer requirements and preferences, ensuring a perfect match for every unique application.
1. Corrosion Resistance
Crafted with anti-corrosion materials like polyethylene and epoxy resin, this steel pipe boasts exceptional corrosion resistance. These polymer materials form a robust barrier against soil and fluid damage, significantly extending the pipeline's service life.
2. Excellent Hydraulic Properties
Featuring an ultra-smooth inner wall, this pipe minimizes scaling and boasts a low friction coefficient. Its sleek surface and non-adhesive attributes maintain optimal conveying capacity, while effectively reducing pressure loss and energy consumption during water transmission.
3. Good Hygiene Performance
The interior epoxy resin coating ensures a smooth, scale-resistant surface, promoting safety and hygiene. Meeting the GB/T17219 health standard, it prevents any contamination, safeguarding water quality throughout its usage.
4. Superior Adhesion of Coating
Through the modification of epoxy resin and polyethylene powder, a powerful chemical bond forms with the metal, resulting in outstanding adhesion. The outer polyethylene layer showcases excellent toughness and impact resistance, adept at resisting scratches, knocks, and even plant root penetration.
5. Long Life
Designed for longevity, these anti-corrosion steel pipes can serve efficiently for 30 to 50 years under normal conditions, vastly exceeding the lifespan of standard steel pipes.
6. Good Connection Security
Engineered for versatility, our pipes support various connection methods to suit diverse environments and pressure demands. With options like flanged, quick coupling, butt welding, lined with stainless steel, and socket connections, each method ensures mature and reliable linkages.
1. At Shandong Donghong Pipe Industry Co., Ltd., the pinnacle of product quality is achieved through meticulously crafted process designs and cutting-edge manufacturing techniques. Equipped with highly advanced machinery, we exercise rigorous control over every critical phase of production. Drawing on our extensive years of expertise, we are unwavering in our commitment to delivering products of exceptional quality, establishing ourselves as a reliable and trustworthy partner in the industry.
Recognizing the escalating demand for large-diameter pipelines, Donghong has innovatively introduced large-diameter anti-corrosion steel pipes. These products are precisely engineered to meet, and often exceed, international standards, ensuring that we deliver nothing but first-class solutions tailored for modern infrastructure requirements.
2. To adeptly cater to diverse project demands, Donghong has ingeniously devised a multitude of connection methods for large diameter anticorrosive steel pipes. Our offerings include flexible socket connections, precise butt welding, socket lap welds, ball lap welds, and bespoke bevel forms, among others. These options provide an expansive range of choices tailored for specific project needs. Notably, we were the pioneering force in developing a large-diameter socket flexible connection, capable of accommodating a socket caliber up to an impressive 1.8M. This groundbreaking innovation was first deployed in vital water conservancy projects across China, heralding our leadership in the realm of large-diameter steel pipe socket connections.
At Donghong, we boast a dedicated facility for the production of large-diameter, high-pressure pipe fittings, perfectly suited for a variety of projects. Beyond standard offerings, our expert team is adept at customizing unique pipe fittings to meet specific customer requirements and adapt to challenging project environments, ensuring a perfect fit for any application.
Exploring Alternative Connection Methods
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.), prominently recognized by its abbreviation Donghong and esteemed stock code 603856, takes pride in its roots in the culturally rich hometown of Confucius, Qufu, China. Established in the year 1997, Donghong has burgeoned into a distinguished manufacturer specializing in engineering pipelines. As a comprehensive pipeline engineering service provider and esteemed general contractor, Donghong excels in delivering a multitude of functional and tailor-made pipeline solutions. Our core offerings encompass rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and specialized pipelines for significant national projects. On the notable date of November 6, 2017, Donghong achieved the prestigious milestone of being listed on the main board of Shanghai, heralding the distinction of being China's inaugural main board-listed engineering composite pipeline manufacturer.
Donghong is powered by a formidable team of over 200 dedicated R&D specialists and proudly holds ownership of more than 100 innovative patents. Through its affiliations with the national enterprise technology center, CNAS-certified national laboratory, academician expert workstation, and postdoctoral research facilities, Donghong advances the frontier of digitization, informatization, and intelligent solutions in pipeline engineering. We are at the forefront of steering the evolution within the engineering pipeline industry.
Donghong plays a pivotal role in pioneering national key strategic and livelihood projects. By spearheading advancements in the engineering pipeline industry, Donghong contributes to transformative initiatives like the South-to-North Water Diversion, Hanjinwei, and Beijing-Xinjiang Expressway. Our influence extends to the One Belt, One Road initiative, modernized farmland projects, urban and rural water supply integration, Liren gas, centralized heating, and beyond, ensuring a profound impact on national progress and community well-being.
At Shandong Donghong Pipe Industry Co., Ltd., we pride ourselves on our robust and reliable logistics capabilities. We've forged strategic alliances with over five top-tier 5A-level logistics providers, guaranteeing seamless transportation solutions honed over years of industry expertise. Our dynamic logistics network masterfully integrates automobile, railway, port, and shipping services, ensuring that regardless of the climate-be it scorching heat or freezing cold-or the remoteness and ruggedness of the destination, we deliver optimal service. Our comprehensive transportation strategy is meticulously crafted to ensure that every single shipment arrives at your location promptly and efficiently, meeting your highest expectations for delivery excellence.
1. Is your product meets the international standard ?
Our products have pass CE, BV, ISO and wars certificate, and all figures indicates higher than standard, you can feel free to let us know which national standard you required, we will check or test it for you.
2. What kind of service do you offer ?
As a manufacture fatory, we provide pipe products, pipe fittings, package and shipping; as a professional consulation company we provide project consulting advise, pipe system solutions and design suggestions; as an engineering focused enterprise , we also provide pipeline contractor service and pipe repair service, also can give free maintance guidance.
3. Do you support OEM/ODM service?
Yes, we offer customization in material, specification, logo, package , connection methods andothers. Meanwhile, our professional team can offer solution suggestion for your specified projects, we have successfull cases of that service.
4. What's your terms of payment?
T/T or L/C at sight.
5. How can you gurantee the goods you offered is qualified?
We warmly welcome all customers arrange the visit to our company and see our goods in sight, we can also provide strict test as per customer required before order. Meanwhile, before the bulk production, we can dispatch samples for customer to do their own tests to qualify the products.
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