Enhanced Product Description:
Shandong Donghong Pipe Industry Co., Ltd. proudly presents our superior polyurethane-foam tubing, meticulously crafted for optimal insulation of central heating and domestic water pipelines. Engineered to withstand a remarkable temperature range from -50°C to 135°C, this tubing offers unparalleled protection against thermal loss. Its robust construction guarantees exceptional durability, safeguarding your pipes from potential damage. Moreover, the tubing's outstanding chemical resistance ensures versatile applicability across various demanding environments.
Introducing our cutting-edge rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe, a testament to advanced technological innovation. This state-of-the-art design significantly enhances foam density uniformity and ensures consistent insulation layer thickness. The result? Unmatched material efficiency and reduced labor costs, rendering it an exceptionally cost-effective solution for hot water transportation, capable of withstanding 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. |
Boasting uniformity in thickness, density, thermal conductivity, closed cell rate, and water absorption, our Pex pipe insulation ensures superior overall stability.
Featuring minimal axis eccentricity and low thermal conductivity, our product excels at maintaining exceptional heat preservation.
Our polyurethane online spraying process offers high reactivity and excellent bonding with both the steel pipe and the outer protective layer, ensuring the insulation pipe remains unaffected by temperature changes and free from delamination.
With a smooth insulation layer surface and minimal thickness deviation, our product allows for a wide adjustment range.
Utilizing polyethylene winding for the outer protective layer, our design results in a thin and uniform wall with minimal shrinkage, deformation, and stress, thereby solving the common issue of cracking in the protective layer.
By reducing the thickness of the polyethylene outer protective layer, we cut costs while maintaining insulation performance. This leads to lower deformation and stress, significantly decreasing the protective layer's thickness.
Shandong Donghong Pipe Industry Co., Ltd. proudly presents a groundbreaking pipe solution with the following standout features:
1. Eliminates the need for additional support, ensures minimal heat loss, and completely removes the 'support thermal bridge' effect.
2. Exceptional strength and remarkable toughness, coupled with easy welding and effortless construction.
3. Impressively low thermal conductivity, outstanding waterproofing, and superior corrosion resistance, making it ideal for direct burial in both soil and water.
4. Effortless installation thanks to simple connections via flange or quick joints.
5. Unmatched durability with a lifespan exceeding 30 years, suitable for harsh environments ranging from -20ºC to 120ºC.
- At Shandong Donghong Pipe Industry Co., Ltd., our products meet and surpass international standards such as CE, BV, ISO, and WARs certifications. We welcome you to specify your national standards, and we will perform the necessary checks or tests to ensure compliance.
- As a leading manufacturing factory, we provide an extensive range of pipe products, pipe fittings, and comprehensive packaging and shipping services. Our expertise extends to professional consultation, offering project consulting, pipe system solutions, design advice, pipeline contracting, pipe repair services, and complimentary maintenance guidance.
- We offer flexible OEM/ODM services, enabling full customization in material, specifications, logos, packaging, connection methods, and more. Our expert team is prepared to deliver tailored solutions based on our wealth of successful case studies.
- Our payment terms are flexible, including T/T or L/C at sight. We are committed to quality assurance, encouraging customers to visit and inspect our products. We perform rigorous tests as per customer specifications and provide samples for independent testing prior to bulk production.
The Classic Project Cases
Qingdao Haiyang 4.5 Million Square Meters Nuclear Energy Heating Project This landmark project represents China's first official foray into nuclear energy heating, utilizing Donghong's advanced spray-wound pre-direct buried thermal insulation pipes. These pipes boast uniform density and exceptional energy-saving capabilities, significantly enhancing heating transmission efficiency. As a cutting-edge, eco-friendly solution, they are setting new standards in sustainable construction.
Qingdao West Coast Heating Pipeline Network Project
Funded by a substantial investment of 217 million yuan from the Qingdao West Coast Public Utilities Group, this project revolutionizes the region's heating infrastructure. Originating from the Qingdao Special Steel heating first station, the pipeline extends 8.2 kilometers along the east bank of the Henghe River to the Binhai Avenue and the Hongkong Run Avenue Interchange, where it connects with the Huaneng long-distance heating pipeline. By integrating industrial park waste heat, industrial waste heat, and clean energy sources, and employing Donghong's DN1400-DN1200 spray-wound pre-directly buried insulation pipes, this initiative is pioneering a new era of energy saving and consumption reduction.
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 Qufu, China, the illustrious hometown of Confucius. We excel in crafting and delivering bespoke pipeline solutions for a myriad of applications. Our expertise encompasses specialized pipelines for rainwater and sewage diversion, municipal infrastructure, industrial and mining sectors, and pivotal national engineering projects.
Our company has cultivated a comprehensive industrial ecosystem, integrating design institutes, financial institutions, port logistics, construction units, and other essential stakeholders. We are committed to revolutionizing human life through intelligent pipeline solutions, ensuring the utmost safety in pipeline transportation.
Shandong Donghong Pipe Industry Co., Ltd. proudly features a team of over 200 R&D experts and holds more than 100 patents. Utilizing national technology R&D platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, Donghong remains at the cutting edge of digital, informational, and intelligent advancements in pipeline engineering.
Our company spearheads the engineering pipeline industry and fervently supports national key strategic projects and essential public welfare initiatives. Our contributions span the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road, "Two Clear and One Tip", standardized farmland, the integration of urban and rural water supply, Liren gas projects, and centralized heat supply solutions.
1. Does your product meet international standards?
Our products have successfully passed CE, BV, ISO, and WARS certifications, consistently exceeding standard requirements. Please inform us of any specific national standards you need, and we will gladly verify or test our products accordingly.
2. What services do you offer?
As a manufacturing factory, we provide a comprehensive range of pipe products, fittings, packaging, and shipping services. As a professional consultation company, we offer project consulting, pipe system solutions, and design recommendations. Additionally, as an engineering-focused enterprise, we provide pipeline contracting, repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer extensive customization, including material, specifications, logo, packaging, and connection methods. Our professional team can also provide tailored solutions for your projects, backed by numerous successful case studies.
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 invite all customers to visit our facility to inspect our products firsthand. We can also conduct stringent tests as per customer requirements before order placement. Additionally, we can send samples for customers to conduct their own tests to ensure product quality before bulk production.
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