The outer protective layer of the ChillWrap HDPE Jacketed Pre-Insulated Piping 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 sophisticated surface polarization process that dramatically enhances its adhesive compatibility with polyurethane. This groundbreaking approach guarantees superior adhesion performance, ensuring unparalleled 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: Meticulously crafted from seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Prior to thermal insulation, our pipes undergo a rigorous mechanical rust removal process to meet or exceed the GB/T8923.1 Sa level 2.5 standard. This ensures the highest degree of quality and reliability.
2. Slepipe: Expertly engineered using a unique, specially modified flame retardant and anti-static polyethylene resin, processed through a state-of-the-art single screw extrusion machine. This innovative design imparts exceptional impact resistance, superior isolation, and formidable corrosion resistance to our pipes.
3. Polyurethane Insulation Layer: We utilize specially modified flame retardant polyurethane foam, injected under high pressure, to fill the gap between the casing and the working steel pipe. This process creates an unparalleled insulation effect characterized by low thermal conductivity, high compression strength, minimal water absorption, and an elevated closure rate, ensuring the utmost efficiency in thermal retention.
1. Eliminates the necessity for support structures, thereby reducing heat loss and completely eradicating the 'support thermal bridge' phenomenon.
2. Delivers high strength and exceptional toughness, making it suitable for easy welding and convenient construction, promoting efficiency and effectiveness in project completions.
3. Demonstrates low thermal conductivity alongside robust waterproof and corrosion resistance properties. This makes it ideal for direct burial in the ground or underwater applications, ensuring durability and long-lasting performance in various environments.
4. Facilitates easy connection through versatile flange or quick joint connectors, streamlining the installation process and ensuring secure, reliable connections.
5. Promises a remarkable long service life, capable of enduring in environments ranging from -20ºC to 120ºC for over 30 years, offering unparalleled longevity and reliability.
Various Connection Techniques: Explore the different innovative methods for connecting ChillWrap HDPE Jacketed Pre-Insulated Piping, ensuring the highest standards of reliability and efficiency.
| Flange connection |
Flexible socket connection |
Welding Joint Demonstration: Witness the robust and seamless welding joints of our ChillWrap HDPE Jacketed Pre-Insulated Piping in action, providing unmatched durability and stability for your piping system.
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.
Shandong Donghong Pipe Industry Co., Ltd. (referred to as: Donghong Co., Ltd., stock code: 603856) is headquartered in the historic city of Qufu, China, the esteemed hometown of Confucius. Renowned as a leading engineering pipeline manufacturer, we provide comprehensive pipeline engineering services and reliable general contracting. Our core business spans four primary categories, delivering functional and customized pipeline solutions: specialized pipelines for rainwater and sewage diversion, municipal infrastructure, industrial and mining sectors, as well as national key engineering projects. By cultivating an industrial ecosystem that seamlessly integrates design institutes, financial institutions, port logistics, construction units, and enterprises both upstream and downstream, Donghong Co., Ltd. is dedicated to revolutionizing the global pipeline industry. Our mission is to spearhead the innovation of intelligent pipelines that enhance human life and ensure the continuous safety of pipeline transportation.
Donghong is proud to have a dedicated team of over 200 R&D professionals and boasts ownership of more than 100 patents. Our commitment to innovation is bolstered by national technology platforms such as our enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are pioneers in advancing the digitalization, informatization, and intelligentization of pipeline engineering, driving the industry's transformation and establishing new standards of excellence.
In November 2017, Donghong reached a monumental milestone by being listed on the main board of Shanghai, setting a historic precedent for engineered composite piping systems in China.
Outstanding Technical Research and Development Capabilities
Our state-of-the-art national CNAS laboratory is outfitted with the latest testing equipment, enabling the development of innovative products, materials, and connection types. This stringent testing ensures that our product quality remains consistently stable and reliable, underscoring our steadfast commitment to excellence.
Donghong has established strategic partnerships with over five top-tier, 5A-level logistics companies, boasting extensive years of transportation expertise. By integrating automobile transport, railway logistics, port handling, and maritime shipping, we ensure seamless delivery regardless of extreme weather conditions or remote locations. Our sophisticated transportation strategy guarantees that each shipment reaches the customer swiftly and efficiently, embodying our commitment to unparalleled service quality.
1. Does your product meet international standards?
Absolutely! Our products have successfully surpassed the rigorous benchmarks set by CE, BV, ISO, and WAR certifications. Each credential confirms that our offerings not only meet but exceed the required international standards. Should you have specific national standards in mind, we are more than happy to verify or conduct tests to ensure compliance with your needs.
2. What kinds of services do you offer?
Shandong Donghong Pipe Industry Co., Ltd. delivers a holistic suite of services. As a manufacturing powerhouse, we provide an extensive array of pipe products, fittings, along with top-tier packaging and shipping solutions. Our consultancy division excels in offering project consulting, comprehensive pipe system solutions, and expert design recommendations. Furthermore, we are committed to excellence in engineering with services such as pipeline contracting, meticulous repair services, and complimentary maintenance guidance, ensuring your systems operate seamlessly.
3. Do you support OEM/ODM services?
Indeed, Shandong Donghong Pipe Industry Co., Ltd. offers robust OEM/ODM services tailored to your specific needs. We provide customization across materials, specifications, logos, packaging, connection methods, and beyond. Our team of specialists is adept at delivering bespoke solutions for your unique projects, with a proven track record of numerous successful implementations.
4. What are your terms of payment?
We offer flexible payment terms, accepting both T/T and L/C at sight for your convenience.
5. How can you guarantee the quality of your goods?
We extend a warm invitation to all our valued customers to visit our facilities and inspect our products in person. For added assurance, we can conduct thorough tests as per your requests before finalizing any order. Additionally, we provide product samples prior to bulk production, allowing you to conduct your own testing and qualification to guarantee utmost satisfaction.
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