Inner epoxy resin outer polyethylene coated composite steel pipe is a steel-plastic composite product with anti-corrosion properties made from pre-treated steel pipe as the base pipe, fusion bonded epoxy powder coated on the inner surface of the pipe after heating and polyethylene powder coated on the outer surface of the pipe.
| 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: can be customized as customer's needs.
1.Corrosion resistance
Anti-corrosion materials polyethylene and epoxy resin are polymer materials with excellent corrosion resistance, effectively preventing soil and fluid damage to the pipeline to increase the service life of the pipeline.
2. Excellent hydraulic properties
Smooth inner wall, not easy to scale, low coefficient of friction, smooth surface and non-adhesive properties to ensure the pipeline conveying capacity, but also reduces the pressure loss of the pipeline and water transmission energy consumption.
3. Good hygiene performance
The surface of epoxy resin coating inside the pipeline is smooth, not easy to scale, safe and hygienic, and the anticorrosion material meets the requirements of GB/T17219 health standard, which effectively avoids the contamination of the pipeline to the water quality.
4. Superior adhesion of coating
Epoxy resin, polyethylene powder raw materials after modification, and metal to form a strong chemical bond, strong adhesion. The outer polyethylene layer has good toughness and impact resistance, able to resist scratching caused by dragging and knocking, and resistant to plant root puncture.
5. Long life
Anti-corrosion steel pipe can be used continuously for 30~50 years under the condition of normal construction and use, which is a significant increase in the life span of ordinary steel pipe.
6. Good connection security
A variety of connection methods to meet different environments, different pressure requirements. Pipes are generally flanged, quick coupling, butt welding, lined with stainless steel, socket connection, etc. The connection is mature and reliable.
1.The final quality level of the product depends on the process design and manufacturing process, Donghong with sophisticated equipment for product quality key process control and incorporate years of manufacturing experience, to provide customers with high quality products, to become a trustworthy enterprise.
In response to the growing demand for large-diameter pipelines, Donghong has added large-diameter anticorrosion steel pipe to provide first-class products against international standards.
2.In order to meet the needs of different projects, Donghong has developed various connection methods for large diameter anticorrosive steel pipe, such as flexible socket connection, butt welding, socket lap weld, ball lap weld, customized bevel form and other connection forms, which provide a variety of choices for the project. In the industry was the first to develop a large-diameter socket flexible connection, the maximum socket caliber can reach 1.8M, and the first to be used in key water conservancy projects in China, becoming China's large-diameter steel pipe socket connection pioneers and leaders.
Donghong has a large-diameter, high-pressure pipe fittings factory, which produces large-diameter, high-pressure pipe fittings for projects, and can also help customers customize special pipe fittings according to customer requirements and project environment.
Other 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 hometown of Confucius - Qufu, China. (Shandong Donghong Pipeline Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856), headquartered in the hometown of Confucius - Qufu, China, was founded in 1997, is a manufacturer of engineering pipeline, pipeline engineering service provider and general contractor of pipeline engineering, with the four major categories of functional and customized pipelines, namely, rainwater and sewage drainage pipe, municipal pipeline, industrial and mining pipeline, and pipeline for the national key projects as its main business. pipeline engineering general contractor.On November 6, 2017, it was listed on the main board of Shanghai, and is the first main board listed engineering composite pipeline manufacturer in China.
Donghong has more than 200 R&D personnel and more than 100 patents. Relying on the national enterprise technology center, national CNAS laboratory, academician expert workstation, postdoctoral workstation and other national technology research and development platforms, Donghong deepens the research on digitalization, informatization and intelligence of pipeline engineering and leads the development of engineering pipeline industry.
The company has been engaged in national key strategic projects and livelihood projects. Leading the development of engineering pipeline industry, it serves the national key strategic projects and livelihood projects such as South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road, standardized farmland, integration of urban and rural water supply, Liren gas, centralized heating, and so on.
Donghong has established strategic partnerships with more than 5 5A-level logistics companies, and we have many years of transportation experience. Combining automobile transportation, railway transportation, port and shipping logistics, etc., no matter the heat or cold, no matter the area is remote or harsh, we can provide you with the best service. We have a comprehensive transportation strategy to ensure that every shipment is delivered to the customer site as soon as possible.
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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