Product Description:
Shandong Donghong Pipe Industry Co., Ltd. proudly presents our high-performance polyurethane-foam tubing, meticulously crafted to insulate central heating and domestic-water pipelines. Our tubing exhibits exceptional resilience, withstanding temperatures from a chilling -50°C to a scorching 135°C. This superior protection ensures minimal heat transfer and maximizes energy efficiency. The robust construction guarantees outstanding durability, safeguarding your pipelines against potential damage. Furthermore, our tubing is highly resistant to an array of chemicals, making it an ideal choice for diverse applications.
Introducing our state-of-the-art rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe, engineered with cutting-edge technology to achieve unparalleled foam density uniformity and consistent insulation layer thickness. This visionary design not only optimizes material usage but also significantly cuts labor expenses, offering a highly cost-effective solution for the transportation of hot water up to a remarkable 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 and often represent the weak link in engineering quality. To ensure top-notch quality for our clients, Donghong Pipeline has established a comprehensive production workshop for steel and plastic pipe fittings. We specialize in designing and manufacturing a complete range of compatible fittings, offering integrated solutions tailored to our customers' projects.
The Innovative Flexible Socket Connection Insulation Pipe
Donghong Pipeline proudly introduces the newly developed flexible socket connection insulation pipe. This advanced installation method significantly accelerates the process compared to traditional welding connections, effectively eliminating the defects commonly associated with welded patches during construction.
Insulation Pipe Patch Demonstration
Our Steel Piping Insulation for Underground Systems boasts unparalleled uniformity in core indicators such as thickness, density, thermal conductivity, closed cell rate, and water absorption, ensuring exceptional overall stability.
Experience superior thermal efficiency with our product, featuring minimal axis eccentricity, low thermal conductivity, and outstanding heat preservation capabilities.
The polyurethane online spraying process offers remarkable reactivity and an excellent bonding effect with the steel pipe and outer protective layer. This design ensures the insulation pipe remains unaffected by temperature fluctuations, eliminating delamination issues.
Our insulation layer is meticulously designed with a flat surface and minimal thickness deviation, providing a broad adjustment range to meet diverse requirements.
The outer protective layer is innovatively crafted using a polyethylene winding method. This results in a thin, uniform wall with minimal shrinkage, deformation, and stress, thereby enhancing the overall mechanical properties and resolving any cracking issues.
By reducing the thickness of the polyethylene outer protective layer, we save on costs while maintaining the same high insulation standards. This approach significantly decreases deformation and stress, allowing for a substantial reduction in the protective layer's thickness.
Shandong Donghong Pipe Industry Co., Ltd. proudly presents a groundbreaking pipe solution that comes loaded with the following unparalleled features:
1. Enjoy hassle-free installation with our innovative design that requires no additional support, significantly minimizes heat loss, and completely eradicates the problematic 'support thermal bridge' effect.
2. Benefit from our pipes' exceptional high strength and outstanding toughness. These pipes are crafted for easy welding and seamless construction, ensuring a smooth and efficient installation process.
3. Our pipes boast low thermal conductivity, making them exceptionally energy-efficient. Additionally, they offer superior waterproofing and remarkable corrosion resistance, ideal for direct burial in soil or water environments.
4. Experience trouble-free connection methods with our simple flange or quick joint options, designed for quick and effortless installation.
5. These pipes are built to last, with a durable design that promises a long service life. Suitable for a wide range of environments from -20ºC to 120ºC, they can reliably serve you for over 30 years.
| Raw material strategic partners |
Complete production equipment, testing equipment |
- At Shandong Donghong Pipe Industry Co., Ltd., our products are manufactured to meet and exceed esteemed international standards such as CE, BV, ISO, and various certifications. If you have specific national standards in mind, let us know, and we will conduct the necessary checks and tests to ensure compliance.
- As a leading manufacturing factory, we not only offer top-quality pipe products and fittings but also provide comprehensive packaging and shipping services. Our expertise extends to professional consultation, offering project consulting advice, pipe system solutions, and innovative design suggestions. Furthermore, we specialize in pipeline contractor services, pipe repair, and provide free maintenance guidance as part of our engineering-focused approach.
- We offer extensive OEM/ODM services, enabling full customization in materials, specifications, logos, packaging, and connection methods. Our expert team is ready to provide tailored solution suggestions for your specific projects, drawing from our wealth of successful past cases.
- Our payment terms are flexible, including T/T or L/C at sight. To assure you of our commitment to quality, we invite you to visit our company and inspect our products firsthand. We also conduct rigorous tests in accordance with customer requirements before processing orders, and provide samples for your own testing prior to bulk production.
The Classic Project Cases
Qingdao Haiyang 4.5 million square meters nuclear energy heating project. This pioneering initiative is the first official website of nuclear energy heating in China, showcasing Donghong's innovative spray-wound pre-direct buried thermal insulation pipe. These state-of-the-art products boast uniform density, exceptional energy-saving capabilities, and significantly enhance heating transmission efficiency. As a groundbreaking and environmentally friendly construction solution, they set new standards in the industry.
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 based in Qufu, China, the illustrious hometown of Confucius. We excel in the design and provision of customized pipelines for a myriad of applications. Our expertise includes specialized pipelines for rainwater and sewage systems, municipal infrastructures, industrial and mining regions, and critically important national engineering endeavors.
Our company has cultivated a comprehensive industrial ecosystem encompassing design institutes, financial institutions, port logistics, construction units, and other pivotal stakeholders. We are unwavering in our commitment to revolutionizing human life through the implementation of intelligent pipeline solutions and steadfastly ensuring the safety and reliability of pipeline transportation.
Shandong Donghong Pipe Industry Co., Ltd. is proud to have a team of over 200 esteemed R&D experts and holds an impressive portfolio of more than 100 patents. By leveraging esteemed national technology R&D platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, Donghong sets the benchmark in the realms of digitalization, informatization, and intelligentization within the pipeline engineering sector.
Our company spearheads the advancement of the engineering pipeline industry, making significant contributions to national key strategic projects and initiatives that enhance the quality of life. Our projects include the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, the Beijing-New Zealand Expressway, the One Belt, One Road initiative, the 'Two Clear and One Tip' project, standardized farmland development, urban and rural water supply integration, Liren gas, and centralized heat supply.
1. Does your product meet international standards?
Our products have passed CE, BV, ISO, and WAR certificates, and all metrics exceed standard requirements. Feel free to inform us of your required national standard, and we will verify or test it accordingly.
2. What range of services do you offer?
As a manufacturing factory, we provide an array of pipe products, fittings, packaging, and shipping solutions. As a professional consultancy, 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?
Yes, we offer customization in material, specifications, logos, packaging, connection methods, and more. Our professional team can also provide tailored solutions for your specific projects, with numerous successful cases to showcase.
4. What are your payment terms?
We accept T/T or L/C at sight.
5. How do you ensure the quality of the goods you offer?
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 dispatch samples prior to bulk production for customers to conduct their own tests and ensure product qualification.
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