Product Description:
Shandong Donghong Pipe Industry Co., Ltd. proudly presents our top-tier polyurethane-foam tubing. Expertly engineered for insulating central heating and domestic-water pipelines, this tubing performs exceptionally in temperatures from -50°C to 135°C. It guarantees superior protection and minimizes heat transfer. Crafted with a robust, rigid structure, it ensures long-lasting durability and safeguards your pipes against potential damage. Furthermore, the tubing's high chemical resistance makes it an ideal choice for a wide range of applications.
Introducing our state-of-the-art rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe. By leveraging cutting-edge technology, we achieve remarkable foam density uniformity and consistent insulation layer thickness. This groundbreaking design not only conserves materials but also lowers labor costs, presenting a highly cost-effective solution for hot water transport 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. |
Our Ferro-Therm pre-insulated pipes boast uniformity in core indicators such as thickness, density, thermal conductivity, closed cell rate, and water absorption, ensuring exceptional overall stability.
Engineered with minimal axis eccentricity and low thermal conductivity, these pipes deliver superior heat preservation, making them highly efficient.
Featuring online polyurethane spraying with high reactivity, our pipes exhibit excellent bonding with both the steel core and outer protective layer. The insulation remains stable against temperature changes, without any delamination.
The insulation layer is meticulously crafted to have a flat surface, minimal thickness deviation, and wide adjustment range, ensuring precise application.
Our innovative polyethylene winding method for the outer protective layer results in thin, uniform walls with low shrinkage, minimal deformation, and stress. This significantly improves overall mechanical properties and resolves cracking issues.
Cost-effective design reduces the thickness of the polyethylene outer protective layer while maintaining insulation performance, thus lowering deformation and stress and significantly cutting costs.
Shandong Donghong Pipe Industry Co., Ltd. presents a groundbreaking pipe solution with the following unparalleled features:
1. No need for support, ensuring minimal heat loss while completely eliminating the 'support thermal bridge' effect, providing superior efficiency.
2. Boasting high strength and excellent toughness, our pipes are easily weldable and offer unmatched convenience in construction.
3. With low thermal conductivity, outstanding waterproof capabilities, and robust corrosion resistance, these pipes are ideal for direct burial in both soil and water.
4. Ease of installation is guaranteed with simple connection methods using flanges or quick joints.
5. Engineered for durability, our pipes have a long service life, withstanding temperatures from -20ºC to 120ºC for over 30 years.
- At Shandong Donghong Pipe Industry Co., Ltd., our products adhere to international standards such as CE, BV, ISO, and wars certificates, consistently exceeding these benchmarks. If you have specific national standards, share them with us, and we will ensure our products meet or surpass them through rigorous testing.
- As a comprehensive manufacturing factory, we offer an extensive range of pipe products, fittings, and packaging and shipping services. Additionally, our expertise extends to project consulting, customized pipe system solutions, and design advice. We also provide pipeline contractor services, pipe repair, and free maintenance guidance with a strong engineering focus.
- We proudly support OEM/ODM services, allowing for customization in material, specifications, logo, packaging, connection methods, and more. Our expert team provides tailored solutions for your specific projects, leveraging our extensive experience from past successes.
- Our flexible payment terms include T/T or L/C at sight. Quality assurance is our priority; we invite customers to inspect our products firsthand. We perform stringent tests according to customer specifications before orders and offer samples for customer testing prior to bulk production.
The Classic Project Cases
Qingdao Haiyang 4.5 Million Square Meters Nuclear Energy Heating Project As China's groundbreaking official nuclear energy heating website, this pioneering project utilizes Shandong Donghong Pipe Industry Co., Ltd.'s innovative spray-wound pre-direct buried thermal insulation pipes. These cutting-edge products feature uniform density and energy-saving properties, significantly enhancing heating transmission efficiency, and representing a revolutionary step towards eco-friendly construction solutions.
Qingdao West Coast Heating Pipeline Network Project
Supported by a substantial investment of 217 million yuan from the Qingdao West Coast Public Utilities Group, this ambitious project springs from the Qingdao Special Steel heating first station. The heating pipeline extends 8.2 kilometers, traversing the east bank of the Henghe River and the north side of Binhai Avenue before connecting with the Huaneng long-distance heating pipeline at the Hongkong Run Avenue Interchange. Integrating waste heat from industrial parks, industrial waste heat, and clean energy sources, the project employs Donghong's DN1400-DN1200 spray-wound pre-direct burial insulation pipes. Together, they forge a new paradigm of energy conservation and reduced consumption.
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, strategically located in Qufu, China - the revered hometown of Confucius. Our expertise lies in designing and delivering tailor-made pipelines for a wide array of applications, including specialized pipelines for rainwater and sewage diversion, municipal infrastructures, industrial and mining sectors, and significant national engineering projects.
Our company has meticulously crafted a comprehensive industrial ecosystem that includes design institutes, financial institutions, port logistics, construction units, and an array of pivotal stakeholders. We are devoted to revolutionizing human life through advanced intelligent pipelines and ensuring the utmost safety in pipeline transportation.
Shandong Donghong Pipe Industry Co., Ltd. proudly stands at the vanguard of innovation with a remarkable team of over 200 R&D experts and an impressive portfolio of more than 100 patents. By harnessing esteemed national technology R&D platforms like the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, Donghong is pioneering the realms of digitalization, informatization, and intelligentization in pipeline engineering.
Our company spearheads the advancement of the engineering pipeline industry, actively engaging in pivotal national strategic projects and essential livelihood initiatives. These include 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 comply with international standards?
Our products have successfully passed CE, BV, ISO, and WARS certifications, with performance figures exceeding the required standards. Please inform us of the specific national standard you need, and we will verify or test our product accordingly.
2. What types of services do you provide?
As a manufacturing factory, we supply pipe products, fittings, packaging, and shipping services. As a professional consulting company, we offer project advice, pipe system solutions, and design recommendations. Additionally, as an engineering-focused enterprise, we provide pipeline contracting and repair services, along with free maintenance guidance.
3. Do you offer OEM/ODM services?
Absolutely, we provide customization in materials, specifications, logos, packaging, and connection methods. Our expert team also offers tailored solutions for specific projects, with numerous successful cases to our credit.
4. What are your payment terms?
We accept T/T or L/C at sight.
5. How do you ensure the quality of your products?
We enthusiastically invite customers to visit our company and inspect our products firsthand. We can conduct rigorous testing as per customer requirements before orders are placed. Furthermore, we can send samples for customer testing to ensure product qualification prior to bulk production.
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