Product Description:
Introducing the superior Thermal Protected Subterranean Pipe Network from Shandong Donghong Pipe Industry Co., Ltd. This state-of-the-art polyurethane-foam tubing is meticulously engineered to insulate central heating and domestic-water pipelines. With an impressive temperature resistance ranging from -50°C to 135°C, it ensures exceptional protection and minimal heat transfer. The robust construction guarantees long-lasting durability and safeguards against pipe damage. Furthermore, its remarkable chemical resistance makes it ideal for diverse applications.
Our cutting-edge rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe harnesses advanced technology to optimize foam density uniformity and insulation layer thickness consistency. This avant-garde design not only conserves materials but also significantly lowers labor costs, presenting 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 the cornerstone of any piping system, yet they often represent the weak link in the quality of engineering projects. To safeguard the integrity and quality of our customers' projects, Shandong Donghong Pipe Industry Co., Ltd. has established a dedicated production workshop for steel and plastic pipe fittings. We specialize in designing and manufacturing a comprehensive array of matching fittings, ensuring we can provide integrated solutions tailored to meet the specific needs of both our customers and their projects.
The Flexible Socket Connection Insulation Pipe
Donghong Pipeline proudly presents its newly developed flexible socket connection insulation pipe. This innovative installation method is significantly faster than traditional welding connections, effectively eliminating the common defects associated with welding patches during construction.
Insulation Pipe Patch Demonstration
Core indicators such as thickness, density, thermal conductivity, closed cell rate and water absorption are uniform, ensuring exceptional overall stability.
With minimal axis eccentricity and low thermal conductivity, this product boasts an excellent heat preservation effect.
The online spraying of polyurethane offers high reactivity, superior bonding with the steel pipe and the outer protective layer. This insulation pipe remains stable despite temperature changes, with no delamination occurring.
Featuring a flat surface for the insulation layer, minimal thickness deviation, and an extensive adjustment range.
The outer protective layer employs a polyethylene winding method, ensuring a thin, uniform wall with reduced shrinkage, minimal deformation, and stress. This method significantly enhances the mechanical properties and resolves cracking issues.
By reducing the thickness of the polyethylene outer protective layer, costs are saved. Under identical insulation conditions, deformation and stress on the outer layer are minimized, allowing for a significantly thinner protective layer.
Shandong Donghong Pipe Industry Co., Ltd. introduces a groundbreaking pipe solution, boasting the following standout features:
1. No need for external support, ensuring minimal heat loss and completely eliminating the "support thermal bridge" effect.
2. High strength and exceptional toughness, coupled with easy welding and seamless construction for utmost convenience.
3. Low thermal conductivity paired with superior waterproofing, and outstanding corrosion resistance, making it ideal for direct burial in soil or water.
4. Simplified connection via flange or quick joint, ensuring effortless and efficient installation.
5. Remarkably durable with an extensive service life, perfectly suited for environments ranging from -20ºC to 120ºC, ensuring reliable performance for over 30 years.
| Raw material strategic partners |
Complete production equipment, testing equipment |
- Products from Shandong Donghong Pipe Industry Co., Ltd. comply with international standards such as CE, BV, ISO, and wars certificates. We guarantee that all our products surpass these standards. Simply inform us of your national standard requirements, and we will verify or test accordingly.
- As a comprehensive manufacturing facility, we provide pipe products, pipe fittings, packaging, and shipping services. Additionally, as a professional consultancy, we offer project consulting, pipe system solutions, and design recommendations. Our services extend to pipeline contracting, pipe repair, and free maintenance guidance, emphasizing our engineering expertise.
- We offer extensive OEM/ODM services, allowing customization in material, specifications, logos, packaging, connection methods, and beyond. Our expert team provides tailored solutions for your specific projects, backed by successful past cases.
- Our payment terms include T/T or L/C at sight. We assure the quality of our products by inviting customers to visit our facility and inspect the products in person. Rigorous testing is conducted according to customer specifications before orders are finalized, and samples are provided for pre-production testing.
The Classic Project Cases
Qingdao Haiyang 4.5 Million Square Meters Nuclear Energy Heating Project. This groundbreaking endeavor marks the first official venture into nuclear energy heating in China. Leveraging Donghong's innovative spray-wound, pre-direct buried thermal insulation pipes, this project showcases our commitment to excellence. These state-of-the-art pipes feature uniform density and are designed for superior energy saving, significantly enhancing heating transmission efficiency. Embrace the future of environmentally friendly construction with our cutting-edge solutions.
Welcome to Shandong Donghong Pipe Industry Co., Ltd.
Shandong Donghong Pipe Industry Co., Ltd. (referred to as Donghong Co., Ltd., stock code: 603856) is a premier engineering pipeline manufacturer headquartered in the culturally rich city of Qufu, China, the birthplace of Confucius. We excel in crafting and delivering tailor-made pipelines for a diverse range of applications, from rainwater and sewage diversion to critical infrastructure in municipal, industrial, and mining sectors, as well as national key engineering projects.
Our company has cultivated a comprehensive industrial ecosystem, integrating design institutes, financial entities, port logistics, construction firms, and other pivotal stakeholders. We are passionately committed to revolutionizing human life with intelligent pipelines, ensuring the utmost safety and efficiency in pipeline transportation.
Shandong Donghong Pipe Industry Co., Ltd. is proud to employ a team of over 200 R&D specialists and own an impressive portfolio of more than 100 patents. By utilizing national research and development platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, Donghong is leading the charge in the digitalization, informatization, and intelligentization of pipeline engineering.
Our company spearheads the advancement of the engineering pipeline sector and plays a significant role in key national strategic initiatives and public welfare projects, including the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road, 'Two Clear and One Tip', standardized farmland, urban and rural water supply integration, Liren gas, and centralized heat supply.
1. Does your product meet international standards?
Absolutely! Our products have received CE, BV, ISO, and WARS certifications, with all metrics exceeding standard requirements. If you have specific national standards in mind, let us know, and we will verify or test them for you.
2. What kind of services do you offer?
As a manufacturing factory, we provide high-quality pipe products, fittings, packaging, and shipping. As a professional consultation company, we offer project consulting, pipe system solutions, and design suggestions. Additionally, as an engineering-focused enterprise, we deliver pipeline contractor and repair services, along with free maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer comprehensive customization in materials, specifications, logos, packaging, and connection methods. Our expert team can also provide tailored solution suggestions for your projects, backed by successful case studies.
4. What are your payment terms?
We accept T/T or L/C at sight.
5. How do you guarantee the quality of your products?
We warmly welcome all customers to visit our company and inspect our goods firsthand. We can also conduct stringent tests as per customer requirements before order confirmation. Additionally, we can send samples for customers to perform their own tests to ensure product quality before bulk production.
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