INSULATION PIPE SYSTEM FOR MINE: Discover the pinnacle of efficiency and reliability with Shandong Donghong Pipe Industry Co., Ltd.'s state-of-the-art high-temperature PPU pipes. Specifically designed for underground applications, our pre-insulated pipe systems guarantee exceptional thermal insulation and durability. These features make them the ideal choice for demanding mining operations. Trust in the unmatched quality and innovative technology of our insulation pipe systems to significantly enhance the performance and longevity of your infrastructure.
| 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 system showcases a groundbreaking stent-free foaming platform, ingeniously eliminating the usual stent effect that results in considerable heat loss. The outer sheath is ingeniously fabricated from a distinctive, modified anti-static flame-retardant polyethylene material, meticulously formed through a singular spiral extruder extrusion process. This guarantees an impeccable bond between the foamed insulation layer and the polyethylene layer, effectively thwarting any delamination issues. The DHPI mining thermal insulation pipe is distinguished by its exceptional impact resistance, superb isolation properties, and outstanding corrosion resistance, setting a new benchmark in the industry.
1. Working Steel Pipe: Crafted with unparalleled expertise from seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Pre-insulation, our pipes undergo stringent mechanical rust removal, adhering to the highest quality standard of no less than GB/T8923.1 Sa level 2.5.
2. Slepipe: Engineered with precision using specially modified flame-retardant and anti-static polyethylene resin, processed through a state-of-the-art single screw extrusion machine. This grants our pipes extraordinary impact resistance, exceptional isolation, and formidable corrosion resistance, ensuring peak performance in every application.
3. Polyurethane Insulation Layer: Harnessing cutting-edge technology, we inject modified flame-retardant polyurethane foam under high pressure to fill the void between the casing and the working steel pipe. This creates an unparalleled insulation effect, marked by minimal thermal conductivity, high compression strength, low water absorption, and an exceptionally high closure rate.
1. Our system eliminates the necessity for support structures, significantly reducing heat loss and completely abolishing the 'support thermal bridge' phenomenon, thereby ensuring superior thermal efficiency.
2. Exhibiting high strength and remarkable toughness, our pipes are not only easily welded but also facilitate convenient construction, making them an ideal choice for various applications.
3. Featuring low thermal conductivity along with robust waterproof and corrosion resistance, our pipes are perfectly suited for direct burial in the ground or use in underwater applications, providing reliable performance in even the most challenging environments.
4. Ensures seamless connection through flange or quick joint connections, simplifying the installation process and enhancing operational efficiency.
5. Designed with durability in mind, our pipes promise a long service life, capable of withstanding harsh conditions ranging from -20ºC to 120ºC for over 30 years, ensuring long-term reliability and performance.
Versatile Connection Methods
| Flange connection |
Flexible socket connection |
Comprehensive Demonstration of Welding Joints
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. Our innovative solution ensures energy efficiency and durable performance, making it the go-to choice for long-term infrastructure projects. Choose Shandong Donghong Pipe Industry Co., Ltd. for high-quality, reliable insulation solutions that meet the rigorous demands of modern industries.
Shandong Donghong Pipe Industry Co., Ltd. (referred to as: Donghong Co., Ltd., stock code: 603856) stands as a beacon of innovation in Qufu, China, the esteemed birthplace of Confucius. Renowned as a leading engineering pipeline manufacturer and an all-encompassing service provider in pipeline engineering, Donghong Co., Ltd. is your trusted partner for transformative pipeline solutions. Our core business encompasses four primary functional categories: specialized pipelines for rainwater and sewage diversion, municipal applications, industrial and mining zones, and national key engineering projects. By fostering an integrated industrial ecosystem that includes design institutes, financial institutions, port logistics, construction units, and a network of upstream and downstream enterprises, Donghong Co., Ltd. is dedicated to revolutionizing the global pipeline landscape. Our mission is to pioneer intelligent pipeline solutions that enhance human life and fortify the safety of pipeline transportation across the globe.
Donghong takes pride in its formidable team of over 200 R&D professionals and a portfolio exceeding 100 patents. Our commitment to innovation is fortified by national technology platforms, including the enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. Leading the charge in the digitalization, informatization, and intelligentization of pipeline engineering, we are not just participants but pioneers in the industry's evolution, continuously setting new standards of excellence.
In a landmark achievement, Donghong made history in November 2017 as the first engineered composite piping systems company in China to be listed on the main board of Shanghai, solidifying our position as industry trailblazers.
Outstanding Technical Research and Development Capabilities
Our national CNAS laboratory, equipped with state-of-the-art testing apparatus, is the cornerstone of our innovative thrust. This advanced facility enables the development of cutting-edge products, materials, and connection methodologies. Through rigorous testing standards, we ensure our product quality remains steadfastly stable and reliable, reflecting our unwavering dedication to excellence.
Donghong has established strategic partnerships with over five elite 5A-level logistics companies, backed by extensive years of transportation expertise. Whether by automobile, railway, port, or shipping logistics, our multifaceted approach ensures seamless service regardless of challenging weather or remote locations. Our robust transportation strategy guarantees prompt delivery of every shipment to your site, providing you with unparalleled service efficiency and reliability. Our commitment to excellence in logistics ensures that your products arrive safe, secure, and on time, every time, empowering your projects to move forward without delay.
1. Does your product meet international standards?
Our products proudly surpass international standards, having earned CE, BV, ISO, and WAR certifications. Each specification not only meets but exceeds the necessary criteria. Specify your required national standard, and we will validate or test it to confirm compliance.
2. What kinds of services do you offer?
As a leading manufacturing factory, we provide a wide array of pipe products, fittings, comprehensive packaging, and efficient shipping solutions. Our consultancy services include expert project advice, customized pipe system solutions, and specialized design recommendations. Furthermore, as an engineering-focused enterprise, we excel in pipeline contracting, professional repair services, and offer complimentary maintenance guidance, ensuring seamless operations for your projects.
3. Do you support OEM/ODM services?
Absolutely. We offer extensive customization options, including materials, specifications, logos, packaging, and connection methods. Our proficient team delivers tailored solutions for unique project requirements, with numerous successful cases exemplifying our superior service.
4. What are your terms of payment?
We accommodate payments via T/T or L/C at sight for your convenience.
5. How can you guarantee the quality of your goods?
We enthusiastically invite all customers to visit our state-of-the-art facility and witness our product quality firsthand. We also conduct rigorous tests as per customer requests before finalizing orders. Furthermore, we can provide pre-production samples for customer testing to ensure complete satisfaction and qualification before bulk production.
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