Steel Pipe Cover with Ppu Pipe, Tube and High Density Polyurethane Foam

• Application: Chemical Transport, Industrial Processing, Oil and Gas Distribution, Wastewater Management, Water Supply, Thermal Insulation
• certification: CE, ISO9001
• Connection Type: Flanged Joint
• Diameter: 90mm-955mm
• Material: Dhpe and Ppu
• Temperature Range: -20℃ to 80℃
• Model NO.: DH-The thermal insulation-BWGG
• Filling Density: 60-90 Kg/M3
• Foam Core Density: 68.9 Kg/M3
• Thermal Conductivity: 0.029 W/(M.K)
• Radial Compressive Strength: 0.42 MPa
• Water Absorption: 5.9 %
• Ate of Closed Hole: ≥90%
• Shear Strength: 149-195 Kpa , 170ºC, 1450h
• Transport Package: Standard Package
• Specification: 6m, 12m or Upon your request
• Trademark: DHPI
• Origin: Shandong, China
• HS Code: 3917390000
• Production Capacity: 50000000 Tons /Year

Product Description

Product Description

INSULATION PIPE SYSTEM FOR MINE: Experience unparalleled efficiency and reliability with Shandong Donghong Pipe Industry Co., Ltd.'s cutting-edge high temperature PPU pipes. Specifically engineered for underground applications, our tube with pre-insulated pipe systems ensures optimal thermal insulation and robustness, making them the perfect choice for mining operations. Trust in the superior quality and advanced technology of our insulation pipe systems to 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 Advantages

Our system showcases a groundbreaking stent-free foaming platform, eradicating the stent effect that induces substantial heat loss. The outer sheath is meticulously designed from a specialized, modified anti-static flame-retardant polyethylene material, formed through a premier single spiral extruder extrusion process. This innovative approach secures a flawless bond between the foamed insulation layer and the polyethylene layer, ensuring the insulation pipe remains intact without delamination. The DHPI mining thermal insulation pipe is distinguished by its exceptional impact resistance, superior isolation properties, and formidable corrosion resistance.

1. Working Steel Pipe: Engineered with precision, our steel pipes are made from seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Prior to insulation, these pipes undergo stringent mechanical rust removal, achieving an impeccable quality standard of no less than GB/T8923.1 Sa level 2.5.
2. Slepipe: Crafted with meticulous attention to detail, our Slepipes use specially modified flame-retardant and anti-static polyethylene resin, processed through a state-of-the-art single screw extrusion machine. This process endows our pipes with unmatched impact resistance, outstanding isolation, and formidable corrosion resistance.
3. Polyurethane Insulation Layer: Leveraging advanced technology, we inject modified flame-retardant polyurethane foam under high pressure to fill the gap between the casing and the working steel pipe. This method delivers an unparalleled insulation effect, characterized by ultra-low thermal conductivity, high compression strength, minimal water absorption, and an impressive closure rate.

1. Our innovative system eliminates the need for support structures, drastically reducing heat loss and completely eradicating the 'support thermal bridge' phenomenon.
2. Designed with superior strength and exceptional toughness, our pipes facilitate easy welding and ensure convenient construction.
3. Featuring low thermal conductivity and robust waterproof and corrosion resistance, our pipes are perfectly suited for direct burial in the ground or underwater applications.
4. Ensures seamless connection through flange or quick joint connections, simplifying installation and maintenance.
5. Built for longevity, our pipes promise an extended service life, enduring harsh environments ranging from -20ºC to 120ºC for over 30 years.

Connection Method

Diverse and Adaptable Connection Methods

Flange connection

Flexible socket connection

Detailed Demonstration of Seamless Welding Joints

Appliation Cases

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.

Company Profile

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 are not just a premier engineering pipeline manufacturer; we are also a comprehensive service provider in pipeline engineering and a trusted general contractor. Our core business encompasses four primary categories of specialized and customized pipeline solutions: pipelines tailored for rainwater and sewage diversion, municipal areas, industrial and mining zones, and national key engineering projects. By cultivating an industrial ecosystem that seamlessly integrates design institutes, financial institutions, port logistics, construction units, and both upstream and downstream enterprises, Donghong Co., Ltd. is dedicated to revolutionizing 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 prides itself on a robust team of over 200 R&D professionals and a portfolio of more than 100 patents. Our commitment to innovation is underscored by national technology platforms, including our enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are pioneers in the research and advancement of the digitalization, informatization, and intelligentization of pipeline engineering, propelling the industry's evolution and setting new standards of excellence.
In November 2017, Donghong reached a significant landmark 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, equipped with state-of-the-art testing equipment, drives the development of new products, materials, and innovative connection types. This rigorous testing ensures our product quality remains consistently stable and reliable, reaffirming our unwavering commitment to excellence.

Certifications

Packaging & Shipping

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. By prioritizing both speed and safety, we commit to delivering your products in impeccable condition, every time.

FAQ

1. Does your product meet international standards?
Our products not only meet but proudly surpass international standards, having earned esteemed certifications including CE, BV, ISO, and WAR. Each product specification exceeds the necessary criteria, ensuring exceptional quality. Simply 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 preeminent manufacturing factory, we offer an extensive array of pipe products, fittings, comprehensive packaging, and efficient shipping solutions. Our consultancy services encompass 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 and successful operations for your projects.

3. Do you support OEM/ODM services?
Absolutely. We provide extensive customization options, including materials, specifications, logos, packaging, and connection methods. Our proficient team delivers tailored solutions for your unique project requirements, with numerous successful cases exemplifying our superior service. Trust us to bring your vision to life.

4. What are your terms of payment?
For your convenience, we accept payments via T/T or L/C at sight.

5. How can you guarantee the quality of your goods?
We warmly invite all customers to visit our facility and witness our product quality firsthand. Furthermore, we conduct rigorous tests as per customer requests before finalizing orders. To ensure complete satisfaction, we can provide pre-production samples for customer testing, ensuring qualification before bulk production. Your peace of mind is our priority.