Product Description:
Shandong Donghong Pipe Industry Co., Ltd. offers high-quality polyurethane-foam tubing meticulously engineered for insulating central heating and domestic-water pipelines. This advanced tubing withstands temperatures ranging from -50°C to 135°C, ensuring superior protection and minimizing heat transfer. Crafted with rigid construction, it guarantees unparalleled durability and safeguards pipes from potential damage. Furthermore, the tubing exhibits exceptional chemical resistance, making it versatile for a myriad of applications.
Our cutting-edge rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe leverages state-of-the-art technology to optimize foam density uniformity and maintain consistent insulation layer thickness. This groundbreaking design not only conserves materials but also significantly reduces labor expenses, providing a highly cost-effective solution for transporting hot water at temperatures up to 140°C.
| Working Steel Pipe Diameter mm |
Outer Sheath Diameter mm |
Minimum thickness of outer sheath mm |
Insulation layer thickness mm |
| 426 |
494-554 |
4.0 |
30-60 |
| 478 |
547-607 |
4.5 |
30-60 |
| 529 |
598-658 |
4.5 |
30-60 |
| 630 |
700-760 |
5.0 |
30-60 |
| 720 |
790-850 |
5.0 |
30-60 |
| 820 |
891-951 |
5.5 |
30-60 |
| 920 |
992-1052 |
6.0 |
30-60 |
| 1020 |
1093-1153 |
6.5 |
30-60 |
| 1120 |
1194-1254 |
7.0 |
30-60 |
| 1220 |
1316-1436 |
8.0 |
40-100 |
| 1420 |
1538-1678 |
9.0 |
50-120 |
| 1620 |
1760-1880 |
10.0 |
60-120 |
| 1820 |
1960-2080 |
10.0 |
60-120 |
| Note: can be customized as customer's needs. |
Pipe fittings are a crucial component of any piping system, often considered the weak link in engineering construction quality. To ensure superior project quality for our customers, Donghong Pipeline has established an advanced workshop dedicated to the production of steel pipe fittings and essential plastic components. We specialize in designing and manufacturing a comprehensive range of matching fittings, offering integrated solutions tailored to meet the specific needs of each customer and project.
Flexible Socket Connection Insulation Pipe
Donghong Pipeline proudly presents our newly developed flexible socket connection insulation pipe. This innovative installation method significantly accelerates the process compared to traditional welding connections, eliminating the common defects associated with welding patches during construction.
Insulation Pipe Patch Demonstration
Our Chilled Water Pipeline with Heat Proofing boasts core indicators such as uniform thickness, consistent density, excellent thermal conductivity, high closed cell rate, and minimal water absorption. This ensures unmatched overall stability and performance.
Featuring minimal axis eccentricity and low thermal conductivity, our pipeline provides outstanding heat preservation, enhancing the overall efficiency of your system.
Utilizing advanced online polyurethane spraying techniques, our pipeline guarantees high reactivity and superb bonding with the steel pipe and protective outer layer. This results in exceptional insulation that remains unaffected by temperature changes, preventing any delamination issues.
With a smooth, flat surface and minimal thickness deviation, our insulation layer offers a broad adjustment range to suit various requirements, ensuring optimal functionality.
The outer protective layer employs a state-of-the-art polyethylene winding method. This results in a thin, uniform wall with low shrinkage rates, minimal deformation and stress, and superior mechanical properties, effectively eliminating the risk of cracks.
By reducing the thickness of the polyethylene outer protective layer, we not only save on costs but also decrease deformation and stress. This allows for a considerably thinner outer layer while maintaining the same insulation conditions, ensuring efficient and cost-effective performance.
At Shandong Donghong Pipe Industry Co., Ltd., we pride ourselves on offering a groundbreaking pipe solution designed to meet the most demanding specifications:
1. No need for additional support, ensuring minimal heat loss and completely eliminating the problematic 'support thermal bridge' effect.
2. Built with high strength and excellent toughness, our pipes facilitate easy welding and convenient construction processes.
3. Featuring low thermal conductivity, outstanding waterproofing, and superb corrosion resistance, our pipes are ideal for direct burial in both soil and water environments.
4. Enjoy simplified connections with flange or quick joint methods, making installation a breeze.
5. Our pipes boast impressive durability and a long service life, effectively operating in environments ranging from -20ºC to 120ºC for more than 30 years.
| Raw material strategic partners |
Complete production equipment, testing equipment |
- At Shandong Donghong Pipe Industry Co., Ltd., all our products are manufactured to meet international standards such as CE, BV, ISO, and WARS. We are committed to exceeding these standards and are happy to verify or test any national standard you require.
- As a leading manufacturing factory, we provide an array of products including pipes, pipe fittings, and packaging, along with comprehensive shipping services. Our expertise extends to professional consultation, offering project consulting advice, pipe system solutions, and design suggestions. We also specialize in pipeline contracting, pipe repair services, and free maintenance guidance, underscoring our engineering-focused capabilities.
- We offer robust OEM/ODM services, enabling full customization of materials, specifications, logos, packaging, connection methods, and more. Our expert team can provide tailored solution suggestions for your projects, drawing from a wealth of successful past cases.
- Our payment terms include T/T or L/C at sight. We stand by the quality of our goods, inviting customers to visit our company for an inspection. Stringent tests as per customer requirements are conducted before order confirmation, and samples are provided for customers to conduct their own tests prior to bulk production.
The Classic Project Cases
Qingdao Haiyang 4.5 million square meters nuclear energy heating project. This project, a pioneering endeavor featured on China's first official nuclear energy heating website, incorporates Donghong's innovative spray-wound pre-direct buried thermal insulation pipes. These cutting-edge products, characterized by their uniform density and energy-saving attributes, significantly enhance heating transmission efficiency, embodying a new era of environmentally friendly construction solutions.
Welcome to Shandong Donghong Pipe Industry Co., Ltd.
Shandong Donghong Pipe Industry Co., Ltd. (referred to as Donghong Co., Ltd., stock code: 603856) stands as a premier engineering pipeline manufacturer situated in the historic city of Qufu, the revered hometown of Confucius. Our expertise lies in crafting and delivering specially designed pipelines tailored for diverse applications. These include sophisticated pipelines for rainwater and sewage diversion, extensive municipal projects, industrial zones, mining areas, and significant national engineering endeavors.
Our company has meticulously established a comprehensive industrial ecosystem, collaborating with design institutes, financial entities, port logistics, construction units, and other pivotal stakeholders. We are passionately committed to revolutionizing human living through smart pipeline solutions and upholding the utmost safety in pipeline transportation.
Shandong Donghong Pipe Industry Co., Ltd. prides itself on an elite team of over 200 R&D experts and an impressive portfolio of over 100 patents. By harnessing the power of national technology R&D platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, Donghong is leading the charge in digitalization, informatization, and intelligentization within the pipeline engineering sector.
Our company is at the vanguard of the engineering pipeline industry, making substantial contributions to critical national strategic projects and public welfare initiatives. Our notable engagements include the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road initiative, the "Two Clear and One Tip" policy, standardized farmland development, urban and rural water supply integration, Liren gas, and centralized heat supply systems.
1. Does your product meet international standards?
Our products have passed CE, BV, ISO, and WARS certifications. All performance indicators exceed the standard requirements. Feel free to inform us of any specific national standard you need, and we will check or test it accordingly for you.
2. What services do you offer?
As a manufacturing factory, we supply pipe products, pipe fittings, packaging, and shipping. As a professional consultancy, we offer project consulting advice, pipe system solutions, and design suggestions. Additionally, as an engineering-focused enterprise, we provide pipeline contracting and pipe repair services, along with free maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer customization in material, specifications, logo, packaging, connection methods, and more. Our professional team can also provide tailored solutions for your specific projects. We have a proven track record of successful cases.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How do you guarantee the quality of your products?
We warmly welcome customers to visit our company and inspect our goods firsthand. We can also conduct rigorous tests as per customer requirements before order placement. Additionally, we can dispatch samples before bulk production for customers to perform their own qualification tests.
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