- Overview
- Product Description
- Connection Method
- Appliation Cases
- Certifications
- Company Profile
- FAQ
Basic Info.
Product Description
Polyurethane-foam tubing is most often used to insulate central heating and domestic-water pipelines. This material is resistant in the temperature range -50°C to 135°C, and has a low heat-transfer coefficient. Such a thermal insulator is rigid, and perfectly protects pipes from damage. Tubing made of polyurethane foam is distinguished by its high level of resistance to chemicals. It comes in a soft, hard, and super-hard versions.
Rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe adopts advanced polyurethane spray polyethylene winding online forming technology, which improves the uniformity of foam density and consistency of insulation layer thickness, saves materials, reduces labor costs, and is suitable for Transport hot water with a temperature not higher than 140°C.
Donghong pipe industry has two kinds of special production line of thermal insulation pipe , that is "pipe in pipe " process and "teo steps". 
| Product Advantages |
1. Excellent Insulation Properties: Rigid polyurethane foam provides superior thermal insulation, minimizing heat loss or gain within the pipe system, leading to energy efficiency and cost savings.
2. High Strength and Durability: These pipes are constructed with robust materials, offering high mechanical strength and durability, ensuring long-term performance and reliability even in harsh environmental conditions.
3. Corrosion Resistance: The outer layer of the pipe typically consists of corrosion-resistant materials, such as steel or HDPE, providing protection against corrosion and extending the service life of the pipe system.
4. Reduced Heat Loss: The insulation properties of rigid polyurethane foam significantly reduce heat loss along the pipeline, maintaining consistent temperatures and enhancing operational efficiency.
5. Environmentally Friendly: Rigid polyurethane foam is a lightweight and eco-friendly insulation material, contributing to sustainable construction practices and reducing the carbon footprint of the pipe system.
6.Ease of Installation: These pipes are often prefabricated and designed for easy installation, reducing labor costs and project timelines. Additionally, the lightweight nature of the material facilitates handling and transportation.
7.Versatility: Rigid polyurethane thermal insulation pipes are suitable for various applications, including heating, cooling, and domestic water supply systems, making them versatile solutions for a wide range of projects.
8. Low Maintenance Requirements: Once installed, these pipes typically require minimal maintenance, thanks to their durable construction and resistance to corrosion, reducing ongoing operational costs.
| Product Specification |
| 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. | |||
Shandong Donghong Pipe Industry Co., Ltd. (referred to as: Donghong Co., Ltd., stock code: 603856) is headquartered in Qufu, China, the hometown of Confucius.Is an engineering pipeline manufacturer, pipeline engineering service provider and pipeline engineering general contractor with the main business of four categories of functional and customized pipelines: special pipelines for rainwater and sewage diversion, special pipelines for municipal areas, special pipelines for industrial and mining areas, and special pipelines for national key engineering projects. The company has built up an industrial ecosystem with the participation of design institutes, financial institutions, port logistics, construction units, upstream and downstream enterprises, etc. The company is committed to becoming a global leading pipeline system comprehensive solution provider by making intelligent pipelines change human life and constant safety of pipeline transportation.
Donghong has more than 200 R&D personnel and more than 100 patents. Relying on national enterprise technology center, national CNAS laboratory, academician expert workstation, post-doctoral workstation and other national technology R&D platforms, Donghong deepens the research on digitalization, informatization and intelligentization of pipeline engineering and leads the development of engineering pipeline industry. Relying on national technology research and development platforms such as National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, Post-doctoral Workstation, etc., Donghong deepens the research on the digitization, informatization and intelligence of pipeline engineering, leads the development of engineering pipeline industry, and serves the national key strategic projects and people's livelihood projects, such as 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, centralized heat supply, etc. The company has been engaged in national key strategic projects and people's livelihood projects.
1. Is your product meets the international standard ?
Our products have pass CE, BV, ISO and wars certificate, and all figures indicates higher than standard, you can feel free to let us know which national standard you required, we will check or test it for you.
2. What kind of service do you offer ?
As a manufacture fatory, we provide pipe products, pipe fittings, package and shipping; as a professional consulation company we provide project consulting advise, pipe system solutions and design suggestions; as an engineering focused enterprise , we also provide pipeline contractor service and pipe repair service, also can give free maintance guidance.
3. Do you support OEM/ODM service?
Yes, we offer customization in material, specification, logo, package , connection methods andothers. Meanwhile, our professional team can offer solution suggestion for your specified projects, we have successfull cases of that service.
4. What's your terms of payment?
T/T or L/C at sight.
5. How can you gurantee the goods you offered is qualified?
We warmly welcome all customers arrange the visit to our company and see our goods in sight, we can also provide strict test as per customer required before order. Meanwhile, before the bulk production, we can dispatch samples for customer to do their own tests to qualify the products.