The outer protective layer is meticulously crafted from high-strength, high-toughness polyethylene material. Utilizing Shandong Donghong Pipe Industry Co., Ltd.'s revolutionary polyethylene modification technology, this layer undergoes a surface polarization process that significantly enhances its adhesive compatibility with polyurethane. This innovative approach ensures superior adhesion performance, providing unmatched durability and efficiency in thermal insulation applications. Experience a leap in quality with our ThermoCore Chilled Water Pipe Cover, engineered for extraordinary resilience and thermal efficiency, making it the ultimate choice for all your chilled water systems.
| 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, each pipe undergoes rigorous mechanical rust removal to meet or exceed the GB/T8923.1 Sa level 2.5 quality standard, ensuring outstanding durability and reliability.
2. Slepipe: Featuring a specially engineered modified flame retardant and anti-static polyethylene resin, processed by a state-of-the-art single screw extrusion machine. This provides our pipes with exceptional impact resistance, superior isolation properties, and formidable protection against corrosion, making them a top choice for demanding environments.
3. Polyurethane Insulation Layer: Our advanced modified flame retardant polyurethane foam is injected under high pressure to perfectly fill the gap between the casing and the working steel pipe. This results in an unrivaled insulation effect, characterized by impressively low thermal conductivity, high compression strength, minimal water absorption, and an elevated closure rate for optimal performance.
1. Eliminates the need for external support, significantly reduces heat loss, and completely eradicates the common issue of 'support thermal bridge,' enhancing overall efficiency.
2. Offers remarkable strength and excellent toughness, facilitating easy welding and making construction highly convenient and efficient.
3. Exhibits impressively low thermal conductivity coupled with robust waterproof and corrosion resistance. These attributes make our pipes ideal for direct burial in the ground or underwater, ensuring durability in various challenging conditions.
4. Ensures seamless connectivity through flange or quick joint connections, streamlining installation and maintenance processes.
5. Boasts a remarkable service life, maintaining optimal performance in environments ranging from -20ºC to 120ºC for over 30 years, offering long-term reliability and reduced maintenance costs.
Overview of Various 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. These pipes are engineered to withstand extreme conditions, ensuring longevity and durability. Integrating cutting-edge technology, our insulation solutions guarantee energy efficiency and operational excellence, making Shandong Donghong Pipe Industry Co., Ltd. the trusted name for superior pipe insulation.
Shandong Donghong Pipe Industry Co., Ltd. (commonly known as Donghong Co., Ltd., stock code: 603856) is majestically headquartered in Qufu, China, the illustrious birthplace of Confucius. As a premier engineering pipeline manufacturer, we pride ourselves on being a comprehensive pipeline engineering service provider and a trusted general contractor. Our core business spans four distinct categories of highly-functional and tailored pipeline solutions: specialized pipelines for rainwater and sewage diversion, municipal areas, industrial and mining zones, and national key engineering projects. By cultivating an industrial ecosystem that integrates top-tier design institutes, financial institutions, port logistics, construction units, and both upstream and downstream enterprises, Donghong Co., Ltd. is passionately committed to revolutionizing the global pipeline landscape. Our mission is to pioneer intelligent pipelines that elevate human life and guarantee the enduring safety of pipeline transportation.
Donghong Co., Ltd. takes immense pride in its team of over 200 R&D professionals and the ownership of more than 100 patents. Our innovation is fortified by prestigious national technology platforms, including our enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are trailblazers in the realms of digitalization, informatization, and intelligentization of pipeline engineering, propelling the industry's progression and setting unparalleled standards of excellence.
In a monumental stride forward, Donghong Co., Ltd. was listed on the main board of Shanghai in November 2017, a historic first for engineered composite piping systems in China.
Outstanding Technical Research and Development Capabilities
Our national CNAS laboratory is furnished with state-of-the-art testing equipment, empowering the development of innovative products, materials, and connection types. This stringent testing protocol ensures our products maintain consistent stability and reliability, underscoring our steadfast commitment to excellence.
Donghong has forged robust strategic alliances with over five elite 5A-level logistics companies, backed by an extensive wealth of transportation expertise. Our multi-modal transport solutions, including automobile, railway, port, and shipping logistics, guarantee seamless delivery regardless of weather conditions or geographical challenges. Whether it's sweltering heat or freezing cold, whether the destination is remote or in a rugged terrain, we are committed to providing unparalleled service. Our meticulously crafted transportation strategy ensures that every shipment reaches the customer site swiftly and efficiently.
1. Does your product meet international standards?
Our products have successfully passed CE, BV, ISO, and WAR certifications, all with figures exceeding the required benchmarks. Don't hesitate to specify any national standard you need; we will verify or test it meticulously to meet your expectations.
2. What kinds of services do you offer?
As a leading manufacturing factory, we offer a comprehensive range of pipe products, fittings, and packaging. Our shipping services are designed to ensure timely delivery. In our consultancy role, we provide expert project consulting, innovative pipe system solutions, and design recommendations tailored to your needs. Moreover, as an engineering-focused enterprise, we excel in pipeline contracting, precision repair services, and provide complimentary maintenance guidance to ensure long-term satisfaction.
3. Do you support OEM/ODM services?
Absolutely! We specialize in customization across materials, specifications, logos, packaging, and connection methods. Our highly experienced team is adept at offering tailored solutions for your specific projects, with a proven track record of numerous successful cases showcasing our dedicated service.
4. What are your terms of payment?
We accept T/T or L/C at sight, ensuring flexible and secure payment options for our valued clients.
5. How can you guarantee the quality of your goods?
We warmly welcome all customers to visit our company for an in-depth inspection of our goods. We also conduct stringent tests upon customer request before the order is finalized. Additionally, we offer sample dispatch before bulk production for thorough customer testing and qualification, ensuring complete satisfaction.
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