INSULATION PIPE SYSTEM FOR MINE: Introducing our state-of-the-art Insulation Pipe System, meticulously designed for the rigorous demands of underground mining. Our advanced pipe systems provide unparalleled insulation and protection, contributing to seamless and safe operations in mining environments.
| Performance of outer guard pipe |
| Outer Diameter mm |
Minimum wall thickness mm |
Outer Diameter mm |
Minimum wall thickness mm |
| 90 |
3.0 |
365 |
7.2 |
| 110 |
3.0 |
400 |
7.8 |
| 125 |
3.0 |
420 |
8.0 |
| 140 |
3.0 |
450 |
8.8 |
| 160 |
3.0 |
500 |
9.8 |
| 180 |
3.5 |
550 |
10.8 |
| 200 |
3.9 |
560 |
11.0 |
| 225 |
4.4 |
600 |
11.7 |
| 250 |
4.9 |
630 |
12.3 |
| 280 |
5.4 |
655 |
12.8 |
| 315 |
5.4 |
710 |
13.5 |
| 325 |
6.4 |
760 |
13.9 |
| 335 |
6.6 |
850 |
15.7 |
| 355 |
7.0 |
955 |
17.6 |
Our innovative system employs a stentless foaming platform, effectively addressing the detrimental stent effect and significant heat loss. The outer sheath, crafted from modified professional anti-static flame retardant polyethylene material, is formed using a single spiral extruder molding technique. This ensures a seamless bond between the foamed insulation layer and the polyethylene layer, preventing delamination. Shandong Donghong Pipe Industry Co., Ltd.'s mining thermal insulation pipes boast remarkable features such as exceptional impact resistance, excellent isolation, and superior corrosion resistance.
1. Working Steel Pipe: Our steel pipes-whether seamless, spiral welded, or straight seam welded-are meticulously fabricated. Before thermal insulation, they undergo mechanical rust removal to meet or exceed the quality standard of GB/T8923.1 Sa level 2.5, ensuring durability and reliability.
2. Slepipe: Constructed from specially modified flame retardant and anti-static polyethylene resin, processed via a single screw extrusion machine, our slepipes exhibit unparalleled impact resistance, superior isolation properties, and formidable corrosion resistance.
3. Polyurethane Insulation Layer: We employ modified flame retardant polyurethane foam, injected under high pressure to fill the space between the casing and the working steel pipe. This process results in an extraordinary insulation effect marked by low thermal conductivity, high compression strength, minimal water absorption, and an exceptionally high closure rate.
1. Our system eliminates the need for supports, significantly reducing heat loss and completely eradicating the 'support thermal bridge' phenomenon.
2. Our pipes feature high strength and excellent toughness, making them easy to weld and convenient to construct.
3. Our pipes exhibit low thermal conductivity coupled with robust waterproof and corrosion-resistant properties, making them ideal for direct burial in the ground or underwater applications.
4. Designed for ease of connection, our pipes can be conveniently joined using flanges or quick joint connections.
5. Our pipes offer a long service life, enduring extreme conditions from -20ºC to 120ºC for over 30 years, ensuring longevity and reliability.
Explore Various Connection Methods: Unveil the array of efficient and reliable connection methods specifically designed for our pre-insulated PPU pipes, enhancing the integrity and performance of your underground mining operations.
| Flange connection |
Flexible socket connection |
Welding Joint Demonstration: Discover the meticulous process of welding joints, ensuring a robust and leak-proof connection for our pre-insulated PPU pipes, perfectly suited for the rigorous demands of underground mining applications.
Insulation steel pipes play a crucial role in the insulation projects for liquid and gas transmission pipelines across diverse sectors including 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 distinguishes itself as the ultimate choice, delivering outstanding thermal insulation performance, unmatched safety and reliability, and significantly lower construction costs.
Shandong Donghong Pipe Industry Co., Ltd. (referred to as: Donghong Co., Ltd., stock code: 603856) is proudly headquartered in Qufu, China, the esteemed birthplace of Confucius. Recognized as a foremost engineering pipeline manufacturer, we excel as a comprehensive pipeline engineering service provider and a trusted general contractor. Our expertise spans 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 cultivating an integrated industrial ecosystem encompassing design institutes, financial institutions, port logistics, construction units, and both upstream and downstream enterprises, Donghong Co., Ltd. is committed to revolutionizing the global pipeline landscape. Our mission is to lead with cutting-edge intelligent pipelines that not only elevate human life but also ensure the enduring 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 spirit of innovation is bolstered by national technology platforms, including an 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 evolution and establishing new standards of excellence.
In November 2017, Donghong reached a landmark achievement by being listed on the main board of Shanghai, a historic milestone 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 pioneering products, materials, and connection types. This meticulous testing regime ensures our product quality remains consistently stable and reliable, reflecting our unyielding dedication to excellence.
Donghong has forged robust strategic alliances with over five 5A-level logistics companies, backed by our extensive years of transportation expertise. Leveraging a multifaceted transportation network that integrates automobile, railway, port, and shipping logistics, we ensure seamless service delivery irrespective of climate conditions or geographic remoteness. Our sophisticated transportation strategy guarantees timely delivery to your site, providing you with unparalleled service no matter the circumstances.
1. Does your product meet international standards?
Our products proudly surpass the benchmarks set by CE, BV, ISO, and WAR certificates. Each figure exceeds the stringent criteria of these international standards. If you have a specific national standard in mind, simply let us know, and we will verify or conduct tests to meet your requirements accordingly.
2. What kinds of services do you offer?
As a premier manufacturing factory, we deliver an extensive array of pipe products, fittings, packaging, and shipping services. In our role as a consultancy, we provide expert project consulting, advanced pipe system solutions, and insightful design recommendations. Our engineering prowess enables us to offer comprehensive pipeline contracting, meticulous repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely. We specialize in customization across materials, specifications, logos, packaging, connection methods, and more. Our seasoned team can also craft bespoke solutions tailored to your project requirements, backed by numerous successful instances of our service excellence.
4. What are your terms of payment?
We accept T/T or L/C at sight for your convenience.
5. How can you guarantee the quality of your goods?
We cordially invite all customers to visit our facilities and examine our goods firsthand. Additionally, we offer rigorous testing as per customer requests before finalizing orders. We can also provide samples prior to bulk production for thorough customer testing and approval.
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