The outer protective layer of CoolGuard Chilled Water Piping Protection is meticulously crafted from high-strength, high-toughness polyethylene material. Leveraging Shandong Donghong Pipe Industry Co., Ltd.'s groundbreaking polyethylene modification technology, this layer undergoes a sophisticated surface polarization process. This advanced treatment significantly enhances its adhesive compatibility with polyurethane, ensuring superior adhesion performance. This innovative approach provides unmatched durability and unparalleled efficiency in thermal insulation applications.
| 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. |
1. Working Steel Pipe: Our pipes are meticulously crafted from seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Before thermal insulation, they undergo comprehensive mechanical rust removal, meeting or exceeding the stringent GB/T8923.1 Sa level 2.5 standard.
2. Slepipe: Constructed with specially modified flame retardant and anti-static polyethylene resin, processed by a state-of-the-art single screw extrusion machine. This endows our pipes with exceptional impact resistance, superior isolation, and formidable corrosion resistance.
3. Polyurethane Insulation Layer: We employ advanced modified flame retardant polyurethane foam, injected under high pressure to perfectly fill the gap between the casing and the working steel pipe. This results in unparalleled insulation performance, featuring low thermal conductivity, high compression strength, minimal water absorption, and an elevated closure rate.
1. Eliminates the necessity for support, significantly reduces heat loss, and completely eradicates the occurrence of 'support thermal bridge' phenomena.
2. Provides outstanding strength and excellent toughness, ensuring easy welding and facilitating convenient construction.
3. Exhibits remarkably low thermal conductivity with robust waterproof and corrosion resistance, making it ideal for direct burial both underground and underwater.
4. Guarantees straightforward connections with the use of flange or quick joint connections.
5. Promises a long service life, enduring harsh environments ranging from -20ºC to 120ºC for over 30 years.
Experience a variety of robust and efficient connection methods
| Flange connection |
Flexible socket connection |
Detailed welding joint demonstration
Insulation steel pipes are indispensable in liquid and gas transmission pipe insulation projects across various sectors such as petroleum, chemical industries, central heating systems, heating networks, central air-conditioning ventilation pipes, and municipal engineering. Our high-temperature prefabricated direct-buried thermal insulation steel pipe stands out as a premier choice, offering exceptional thermal insulation performance, unparalleled safety and reliability, and notably reduced construction costs. Our state-of-the-art CoolGuard Chilled Water Piping Protection is engineered to meet the highest standards, ensuring optimal efficiency and longevity for your systems. Choose CoolGuard for superior insulation and cost-effective solutions that redefine quality and dependability in every project.
Shandong Donghong Pipe Industry Co., Ltd. (referred to as: Donghong Co., Ltd., stock code: 603856) is headquartered in Qufu, China, the cherished hometown of Confucius. As an esteemed engineering pipeline manufacturer, comprehensive pipeline engineering service provider, and trusted general contractor, we offer unparalleled expertise. Our core business spans four principal categories of functional and customized pipeline solutions: specialized pipelines for rainwater and sewage diversion, municipal infrastructure, industrial and mining zones, and national key engineering projects. By creating a synergistic industrial ecosystem that includes design institutes, financial institutions, port logistics, construction units, and both upstream and downstream enterprises, Donghong Co., Ltd. is dedicated to revolutionizing the global pipeline landscape. Our mission is to lead with intelligent pipelines that elevate human life and guarantee the perpetual safety of pipeline transportation.
Donghong boasts a formidable team of over 200 R&D professionals and holds an impressive portfolio of more than 100 patents. Our innovation is driven by national technology platforms such as the enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We lead the advancement of digitalization, informatization, and intelligentization in pipeline engineering, steering industry evolution and setting new benchmarks for excellence.
In November 2017, Donghong reached a pivotal milestone by being listed on the main board of Shanghai, marking a historic first for engineered composite piping systems in China.
Outstanding Technical Research and Development Capabilities
Our national CNAS laboratory is outfitted with state-of-the-art testing equipment, enabling the development of new products, materials, and connection types. This rigorous testing ensures that our product quality remains consistently stable and reliable, upholding our unwavering commitment to excellence.
Donghong has established strategic partnerships with over five elite 5A-level logistics companies, boasting extensive experience in transportation. By leveraging a multifaceted logistics network that includes automobile transportation, railway systems, and port and shipping logistics, we guarantee seamless service in any climate and to even the most remote or challenging locations. Our robust transportation strategy ensures that every shipment is delivered to your site promptly and efficiently. Trust in our expertise for impeccable delivery, always.
1. Does your product meet international standards?
Our products proudly surpass the rigorous benchmarks set by CE, BV, ISO, and WAR certifications, consistently exceeding the required standards. If you have specific national standards in mind, let us know, and we will verify or test our products to meet your requirements.
2. What kinds of services do you offer?
As a manufacturing powerhouse, Shandong Donghong Pipe Industry Co., Ltd. offers a vast array of pipe products and fittings, complete with meticulous packaging and shipping services. As trusted consultants, we deliver expert project consulting, comprehensive pipe system solutions, and innovative design recommendations. Furthermore, our engineering excellence extends to pipeline contracting, repair services, and complementary maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely! We specialize in OEM/ODM services, offering extensive customization options in materials, specifications, logos, packaging, connection methods, and beyond. Our adept team excels in crafting bespoke solutions tailored to your unique projects, backed by a wealth of successful case studies.
4. What are your terms of payment?
We offer flexible payment terms, accepting both T/T and L/C at sight to accommodate your financial preferences.
5. How can you guarantee the quality of your goods?
We invite all potential and existing customers to visit our facilities and inspect our products firsthand, ensuring transparency and trust. For additional assurance, we conduct thorough tests as per customer requests before order finalization. We can also provide product samples before mass production for your evaluation and approval.
){kind=link}