Insulation Pipe System for Mine: Introducing a cutting-edge solution designed for the mining industry. Our insulation pipe system offers unmatched durability and thermal efficiency, making it the ideal choice for maintaining operational stability and energy efficiency in challenging mining applications.
| 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 mitigating the heat loss caused by the stent effect. The outer sheath is composed of a specially modified, professional-grade, anti-static flame retardant polyethylene material. This material is formed through a single spiral extruder extrusion molding process, ensuring that the foamed insulation layer seamlessly bonds with the polyethylene layer to prevent delamination. The DHPI mining thermal insulation pipe is designed with outstanding impact resistance, superior isolation, and remarkable corrosion resistance.
1. Working Steel Pipe: Constructed from top-grade seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Each pipe undergoes rigorous mechanical rust removal to meet quality standards not lower than GB/T8923.1 Sa level 2.5, ensuring superior performance before thermal insulation is applied.
2. Slepipe: Designed using a uniquely modified flame retardant and anti-static polyethylene resin, our pipes are processed through a single screw extrusion machine. This sophisticated engineering endows our pipes with exceptional impact resistance, excellent isolation properties, and formidable corrosion resistance.
3. Polyurethane Insulation Layer: We leverage high-pressure injection of modified flame retardant polyurethane foam to fill the space between the casing and the working steel pipe. This state-of-the-art method ensures an unparalleled insulation effect, characterized by low thermal conductivity, high compressive strength, minimal water absorption, and an elevated closure rate, providing robust and long-lasting insulation.
1. Eliminates the necessity for support structures, thereby significantly reducing heat loss and completely eradicating the 'support thermal bridge' phenomenon.
2. Combines high strength with excellent toughness, allowing for easy welding and seamless construction.
3. Demonstrates low thermal conductivity along with robust waterproof and corrosion-resistant properties, making it ideal for direct burial in the ground or underwater applications.
4. Ensures effortless connections through flange or quick joint connectors, simplifying the installation process.
5. Features an impressive long service life, withstanding extreme environments from -20ºC to 120ºC for over 30 years, ensuring durability and reliability.
Explore Various Connection Methods
| Flange connection |
Flexible socket connection |
Detailed Welding Joint Demonstration
Insulation steel pipes are indispensable in liquid and gas transmission pipe insulation projects across various critical 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 stands out as a premier choice, offering exceptional thermal insulation performance, unparalleled safety and reliability, and notably reduced construction costs. With advanced engineering and robust construction, these pipes ensure optimal efficiency and longevity, making them the quintessential solution for all your insulation needs in demanding environments.
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 established strategic partnerships with over five elite 5A-level logistics companies, boasting extensive transportation expertise. Leveraging a robust network that includes automobile, railway, port, and shipping logistics, we ensure seamless delivery regardless of extreme temperatures or challenging terrains. Our meticulous transportation strategy guarantees that every shipment reaches the customer's site promptly and efficiently, providing you with unparalleled service even in the most remote or adverse conditions.
1. Does your product meet international standards?
Our products have successfully passed CE, BV, ISO, and WAR certificates, with all figures exceeding the required standards. Feel free to specify the national standard you need, and we'll verify or test it accordingly.
2. What kinds of services do you offer?
As a manufacturing factory, we provide a comprehensive range of pipe products, fittings, packaging, and shipping. As a consultancy, we offer project consulting advice, pipe system solutions, and design recommendations. Additionally, as an engineering-focused enterprise, we provide pipeline contracting, repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer customization in materials, specifications, logos, packaging, connection methods, and more. Our expert team can also provide tailored solutions for your specific projects, with numerous successful cases showcasing our service.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How can you guarantee the quality of your goods?
We warmly welcome all customers to visit our company and inspect our goods firsthand. We can also conduct stringent tests as requested by customers before the order. Additionally, we can dispatch samples before bulk production for customer testing and qualification.
){kind=link}