The outer protective layer of the FrostGuard Thermal Pipe Insulation System 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 pioneering approach ensures superior adhesion performance, offering unmatched durability and 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: Constructed from high-quality seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Before thermal insulation application, our pipes undergo rigorous mechanical rust removal, ensuring they meet or exceed the exacting GB/T8923.1 Sa level 2.5 standard.
2. Slepipe: Designed with a unique blend of flame retardant and anti-static polyethylene resin, expertly processed using a single screw extrusion machine. This engineering marvel provides our pipes with unparalleled impact resistance, superior isolation capabilities, and formidable corrosion resistance.
3. Polyurethane Insulation Layer: We employ advanced modified flame retardant polyurethane foam, meticulously injected under high pressure to fill the void between the casing and the working steel pipe. This innovative approach delivers exceptional insulation, featuring low thermal conductivity, high compression strength, minimal water absorption, and a remarkable closure rate.
1. Eliminates the necessity for support structures, dramatically reduces heat loss, and completely eradicates the 'support thermal bridge' phenomenon.
2. Offers exceptional strength and remarkable toughness, with easy welding capabilities and convenient construction processes.
3. Demonstrates exceptionally low thermal conductivity alongside robust waterproof and corrosion-resistant properties, making it ideal for direct burial either underground or underwater.
4. Ensures seamless connectivity through flange or quick joint connections, facilitating hassle-free installation.
5. Boasts an impressive service lifespan, reliably performing in environments ranging from -20ºC to 120ºC for over three decades.
Explore Versatile Connection Methods for Maximum Flexibility
| Flange connection |
Flexible socket connection |
Step-by-Step Welding Joint Demonstration for Precision and Reliability
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. Designed for those who require efficiency and durability, our pipes ensure optimal performance in the most demanding environments. Trust in our innovation to deliver superior results in every project, safeguarding your investments with cutting-edge technology.
Shandong Donghong Pipe Industry Co., Ltd. (referred to as: Donghong Co., Ltd., stock code: 603856) is headquartered in Qufu, China, the revered hometown of Confucius. As a premier engineering pipeline manufacturer, comprehensive pipeline engineering service provider, and trusted general contractor, we excel in delivering unparalleled pipeline solutions. Our core business encompasses four primary categories of functional and customized pipeline solutions tailored for rainwater and sewage diversion, municipal areas, industrial and mining zones, and national key engineering projects. By fostering an intricate industrial ecosystem that integrates design institutes, financial institutions, port logistics, construction units, and both upstream and downstream enterprises, Donghong Co., Ltd. is dedicated to transforming the global pipeline landscape. Our mission is to lead with intelligent pipelines that enhance human life and ensure the perpetual safety of pipeline transportation.
Donghong prides itself on a formidable team of over 200 R&D professionals and an impressive portfolio of more than 100 patents. Our innovation is bolstered by national technology platforms such as the enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are at the cutting edge of research, advancing the digitalization, informatization, and intelligentization of pipeline engineering, steering industry evolution, and setting new benchmarks of excellence.
In November 2017, Donghong reached a monumental 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, facilitating the innovative development of new products, materials, and connection types. This rigorous testing ensures our product quality remains consistently stable and reliable, underpinning our unwavering commitment to excellence.
Donghong has established strategic partnerships with over five 5A-level logistics companies, boasting extensive transportation experience. By integrating automobile transportation, railway services, and port shipping logistics, we guarantee exceptional service regardless of heat, cold, remoteness, or harsh conditions. Our comprehensive transportation strategy ensures prompt delivery of every shipment to your site, ensuring efficiency and reliability every step of the way.
1. Does your product meet international standards?
Our products have triumphantly surpassed the rigorous requirements of CE, BV, ISO, and WAR certifications, with all performance metrics exceeding the stipulated standards. Should you need compliance with a specific national standard, simply let us know, and we will either verify or conduct the necessary tests to ensure conformance.
2. What kinds of services do you offer?
As a leading manufacturing factory, we provide a comprehensive suite of pipe products, fittings, packaging, and efficient shipping solutions. In our role as consultants, we offer expert project consulting, innovative pipe system solutions, and bespoke design recommendations. Furthermore, as an engineering-centric enterprise, we specialize in pipeline contracting, professional repair services, and offer complimentary, insightful maintenance guidance to ensure the longevity and optimal performance of your systems.
3. Do you support OEM/ODM services?
Indeed, we provide extensive customization options including various materials, specifications, logos, packaging styles, and connection methods. Our dedicated team of experts is equipped to deliver tailored solutions to meet the unique requirements of your specific projects. Numerous successful case studies exemplify our commitment to exceptional service and customization.
4. What are your terms of payment?
We graciously accept T/T or L/C at sight as our standard payment terms.
5. How can you guarantee the quality of your goods?
We cordially invite all customers to visit our facilities and conduct a firsthand inspection of our products. Furthermore, we are equipped to perform rigorous tests as per customer requests prior to order confirmation. To ensure utmost satisfaction, we can also provide sample dispatches before initiating bulk production for thorough customer testing and qualification.
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