The outer protective layer of our 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. This advanced technique significantly enhances its adhesive compatibility with polyurethane, ensuring superior adhesion performance. The result is unmatched durability and heightened efficiency in thermal insulation applications, making it an ideal choice for industry professionals seeking reliable and enduring solutions.
| 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 working steel pipes are crafted from seamless steel, spiral welded, and straight seam welded pipes. Prior to thermal insulation, each pipe undergoes meticulous mechanical rust removal, ensuring a quality no less than GB/T8923.1 Sa level 2.5.
2. Slepipe: Engineered with a specially modified flame retardant and anti-static polyethylene resin, our slepipes are processed through advanced single screw extrusion machinery. This results in pipes with exceptional impact resistance, superior isolation properties, and formidable corrosion resistance.
3. Polyurethane Insulation Layer: Our polyurethane insulation layer is a marvel of engineering, utilizing modified flame retardant polyurethane foam injected under high pressure. This fills the gap between the casing and the working steel pipe, resulting in unmatched insulation with low thermal conductivity, high compression strength, minimal water absorption, and an elevated closure rate.
1. Eradicates the need for additional support, significantly reduces heat loss, and completely eliminates the phenomenon of the 'support thermal bridge'.
2. Provides high strength coupled with excellent toughness. Its construction is user-friendly, allowing for easy welding and convenient installation.
3. Features low thermal conductivity along with robust waterproof and corrosion resistance, making it ideal for direct burial in soil or underwater environments.
4. Ensures seamless connections through both flange and quick joint connections, facilitating ease of use.
5. Offers an impressively long service life, capable of enduring in diverse environments ranging from -20ºC to 120ºC for over 30 years.
Explore Various Connection Methods: Discover the multiple techniques to connect our ChillWrap HDPE Jacketed Pre-Insulated Piping, ensuring a secure and efficient setup tailored to your specific needs.
| Flange connection |
Flexible socket connection |
Welding Joint Demonstration: Witness our state-of-the-art welding joint technique in action, designed to provide unparalleled durability and reliability for your pre-insulated piping systems.
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 Qufu, China, the revered hometown of Confucius. We stand as a premier engineering pipeline manufacturer, comprehensive pipeline engineering service provider, and trusted general contractor. Our core business encompasses four primary categories of functional and customized pipeline solutions: specialized pipelines for rainwater and sewage diversion, municipal areas, industrial and mining zones, and national key engineering projects. By fostering an 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 boasts a team of over 200 R&D professionals and holds more than 100 patents. Our innovation is anchored by national technology platforms such as the enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are at the forefront of researching and advancing the digitalization, informatization, and intelligentization of pipeline engineering, steering the industry's evolution and setting new benchmarks of excellence.
In November 2017, Donghong achieved a significant 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 equipped with cutting-edge testing equipment, facilitating the development of new products, materials, and connection types. This rigorous testing ensures our product quality remains consistently stable and reliable, maintaining our unwavering commitment to excellence.
Donghong has forged robust strategic alliances with over five elite 5A-level logistics companies. With years of seasoned transportation experience under our belt, we masterfully coordinate automobile, railway, port, and shipping logistics. Be it sweltering heat or chilling cold, whether the destination is remote or challenging, our unwavering commitment ensures unparalleled service. Our holistic transportation strategy guarantees that every shipment reaches your site with the utmost speed and efficiency.
1. Does your product meet international standards?
Our products have successfully passed CE, BV, ISO, and WAR certifications, proudly exceeding all required benchmarks. Specify any national standard you require, and we will confirm or conduct tests to ensure compliance.
2. What kinds of services do you offer?
As a leading manufacturing factory, we provide an extensive array of pipe products, fittings, packaging, and shipping. In our consulting capacity, we deliver project consulting, pipe system solutions, and design recommendations. Additionally, as an engineering-focused enterprise, we offer pipeline contracting, repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely. We offer customization in materials, specifications, logos, packaging, connection methods, and more. Our expert team excels at crafting tailored solutions for your projects, with numerous successful cases to demonstrate our capabilities.
4. What are your terms of payment?
We accept T/T or L/C at sight, ensuring flexible and secure payment methods.
5. How can you guarantee the quality of your goods?
We warmly invite all customers to visit our company for an in-depth inspection of our goods. We can perform rigorous tests as specified by customers before order placement. Additionally, we provide samples prior to bulk production for customer testing and qualification.
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