Product Description:
Shandong Donghong Pipe Industry Co., Ltd. proudly presents our premium hydronic piping with insulated covering. Crafted with high-quality polyurethane-foam, this tubing is meticulously engineered to insulate central heating and domestic-water pipelines, ensuring impeccable performance in extreme temperatures from -50°C to 135°C. Our product offers unparalleled protection with minimal heat transfer, thanks to its robust construction that ensures enduring durability and safeguards against pipe damage. Furthermore, the tubing's exceptional chemical resistance makes it the ideal choice for a wide range of applications.
Discover our state-of-the-art rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe, designed by Shandong Donghong Pipe Industry Co., Ltd. Utilizing cutting-edge technology, this pipe enhances foam density uniformity and ensures consistent insulation layer thickness. This innovative design not only optimizes material usage but also significantly lowers labor costs, presenting a highly economical 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 a critical component of any piping system and can often be the most vulnerable part of engineering projects. To ensure the highest quality for our customers, Donghong Pipeline has established a dedicated workshop for producing both steel and plastic key fittings. This allows us to design and manufacture a comprehensive range of compatible fittings, offering integrated solutions tailor-made for each project.
The Flexible Socket Connection Insulation Pipe
Donghong Pipeline's newly developed flexible socket connection insulation pipe offers a significantly faster installation method compared to traditional welding connections. This innovative approach eliminates the common drawbacks associated with welding patches, streamlining the construction process and enhancing overall efficiency.
Insulation Pipe Patch Demonstration
Our Hydronic Piping with Insulated Covering boasts core indicators such as consistent thickness, density, thermal conductivity, closed cell rate, and water absorption, ensuring exceptional overall stability.
With minimal axis eccentricity and low thermal conductivity, our piping system delivers outstanding heat preservation effects.
Our polyurethane online spraying technique offers high reactivity and excellent bonding with both the steel pipe and the outer protective layer. The insulation pipe remains resilient to temperature changes, eliminating any risk of delamination.
The insulation layer features a flat surface with minimal thickness deviation, providing a wide adjustment range for various applications.
The outer protective layer, crafted using the polyethylene winding method, is thin, uniform, and exhibits minimal shrinkage and deformation. This ensures superior mechanical properties and effectively prevents cracking.
By reducing the thickness of the polyethylene outer protective layer, we achieve significant cost savings. Under identical insulation conditions, this innovation minimizes deformation and stress on the outer layer, allowing for substantial thickness reduction.
Shandong Donghong Pipe Industry Co., Ltd. proudly presents a groundbreaking solution in hydronic piping, featuring unmatched benefits:
1. Say goodbye to support needs and minimize heat loss with our design, effectively eliminating the 'support thermal bridge' effect for enhanced performance.
2. Experience the perfect blend of high strength and exceptional toughness. Our pipes are easy to weld and facilitate seamless, convenient construction.
3. Our pipes boast low thermal conductivity, superior waterproofing, and exceptional corrosion resistance, making them ideal for direct burial in soil or water.
4. Enjoy effortless installation with our simple connection options, including flange or quick joint solutions.
5. Built to last, our pipes are durable and reliable, suitable for various environments from -20ºC to 120ºC, with a lifespan exceeding 30 years.
| Raw material strategic partners |
Complete production equipment, testing equipment |
- At Shandong Donghong Pipe Industry Co., Ltd., our products adhere to international standards such as CE, BV, ISO, and wars certificates. We ensure our offerings surpass these benchmarks. Let us know your required national standard, and we will verify or test it for you.
- As a comprehensive manufacturing factory, we provide an array of services including pipe products, fittings, packaging, and shipping. Additionally, we offer professional consulting for project advice, pipe system solutions, and design recommendations. Our services extend to pipeline contracting, pipe repair, and free maintenance guidance, making us a trusted engineering-focused enterprise.
- We support OEM/ODM services, offering customization in materials, specifications, logos, packaging, and connection methods. Our expert team provides tailored solution suggestions for your specific projects, backed by successful past experiences.
- Our payment terms are flexible, including T/T or L/C at sight. We ensure the highest quality by inviting customers to visit and inspect our products firsthand. Rigorous tests are conducted as per customer requirements before orders, and samples are provided for preliminary testing before bulk production.
The Classic Project Cases
Qingdao Haiyang 4.5 million square meters nuclear energy heating project. This groundbreaking initiative, being the first official nuclear energy heating project in China, proudly features Donghong's innovative spray-wound, pre-direct buried thermal insulation piping. These cutting-edge products offer uniform density and remarkable energy savings, significantly enhancing heating transmission efficiency. Embrace this new era of environmentally friendly construction with our state-of-the-art 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 preeminent engineering pipeline manufacturer located in the historic city of Qufu, China, the birthplace of Confucius. Our expertise lies in designing and delivering tailor-made pipelines for diverse applications, including specialized pipelines for rainwater and sewage diversion, municipal infrastructure, industrial and mining sectors, and major national engineering projects.
Our company has developed a comprehensive industrial ecosystem encompassing design institutes, financial institutions, port logistics, construction firms, and other crucial stakeholders. Committed to enhancing human life through intelligent pipeline solutions, we prioritize the safety and efficiency of pipeline transportation.
Shandong Donghong Pipe Industry Co., Ltd. is proud to have a dedicated 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 leads the way in the digitalization, informatization, and intelligentization of pipeline engineering.
Our company is at the forefront of the engineering pipeline industry, contributing significantly to national key strategic projects and public welfare initiatives. Our notable contributions include the South-to-North Water Diversion Project, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road Initiative, 'Two Clear and One Tip' project, standardized farmland development, urban and rural water supply integration, Liren gas projects, and centralized heat supply systems.
1. Does your product meet international standards?
Our products have passed CE, BV, ISO, and WARS certifications. All figures exceed standard requirements. Feel free to inform us of any national standard you require, and we will gladly check or test it for you.
2. What kinds of services do you offer?
As a manufacturing factory, we provide pipe products, pipe fittings, packaging, and shipping. As a professional consultancy, we offer project consulting advice, pipe system solutions, and design suggestions. As an engineering-focused enterprise, we also provide pipeline contractor services, pipe repair services, and free maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer customization in materials, specifications, logos, packaging, and connection methods. Our professional team can also provide solution suggestions for your specific projects, with numerous successful cases to our credit.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How can you guarantee the quality of your goods?
We warmly welcome all customers to visit our company and inspect our products. We can also conduct strict tests as per customer requirements before placing an order. Additionally, we can dispatch samples before bulk production for customers to conduct their own quality tests.
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