Rigid Foam Lagging for Ppu Pipe, Tube and Underground Thermal Applications

• Customization: Available
• Application: Chemical Transport, Industrial Processing, Oil and Gas Distribution, Wastewater Management, Water Supply, Thermal Insulation
• certification: CE, ISO9001
• Model NO.: DH-The thermal insulation-BWGG
• Diameter: 90mm-955mm
• Material: Dhpe and Ppu
• Temperature Range: -20℃ to 80℃
• 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 challenging underground applications, our expertly crafted tubes with pre-insulated pipe systems deliver exceptional thermal insulation and unmatched robustness. These qualities make them the premier choice for mining operations. Trust in the superior quality, advanced technology, and expert engineering of our insulation pipe systems to significantly enhance the performance, durability, and longevity of your essential 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 innovative system is built upon a state-of-the-art stent-free foaming platform, which entirely eliminates the stent effect responsible for substantial heat loss. The outer sheath is meticulously crafted from a specialized, modified anti-static flame-retardant polyethylene material, created through a single spiral extruder extrusion process. This advanced method ensures a flawless bond between the foamed insulation layer and the polyethylene layer, effectively preventing any delamination of the insulation pipe. The DHPI mining thermal insulation pipe is distinguished by its exceptional impact resistance, superior isolation properties, and outstanding corrosion resistance.

1. Working Steel Pipe: Skillfully fabricated from seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Each pipe undergoes meticulous mechanical rust removal before insulation, adhering to rigorous standards of no less than GB/T8923.1 Sa level 2.5.
2. Slepipe: Precisely designed using specially modified flame-retardant and anti-static polyethylene resin, processed through a single screw extrusion machine. This ensures our pipes possess extraordinary impact resistance, superior isolation, and exceptional corrosion resistance.
3. Polyurethane Insulation Layer: Utilizing cutting-edge technology, we inject modified flame-retardant polyurethane foam under high pressure to fill the gap between the casing and the working steel pipe. This results in an unparalleled insulation effect, characterized by extremely low thermal conductivity, high compression strength, minimal water absorption, and a high closure rate.

1. Our system eradicates the necessity for support structures, dramatically reducing heat loss and eliminating the 'support thermal bridge' phenomenon entirely.
2. Featuring high strength and superior toughness, our pipes are easily welded, facilitating seamless and convenient construction.
3. With remarkably low thermal conductivity, combined with strong waterproof and corrosion resistance, our pipes are ideally suited for direct burial in the ground or underwater applications.
4. Facilitates hassle-free connection through the use of flange or quick joint connections.
5. Engineered for durability, our pipes are designed for an extended service life, withstanding extreme environments from -20ºC to 120ºC for over 30 years.

Connection Method

Diverse Connection Methods for Optimal Versatility

Flange connection

Flexible socket connection

Detailed Demonstration of Professional 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 esteemed hometown of Confucius. We are a distinguished engineering pipeline manufacturer, an all-encompassing service provider in pipeline engineering, and a reliable general contractor. Our core business encompasses four primary categories of superior and bespoke pipeline solutions: specialized pipelines for rainwater and sewage diversion, municipal areas, industrial and mining zones, and national key engineering projects. By cultivating an industrial ecosystem that unites 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 the quality of life and ensure the continual safety of pipeline transportation.

Donghong proudly boasts a team of over 200 R&D professionals and holds an impressive portfolio of more than 100 patents. Our innovation is driven by national technology platforms, including the enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are leaders in researching and advancing 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 momentous milestone by being listed on the main board of Shanghai, marking a historic first for engineered composite piping systems in China.

Exceptional Technical Research and Development Capabilities
Our national CNAS laboratory is outfitted with state-of-the-art testing equipment, enabling the development of innovative products, materials, and connection types. This meticulous testing guarantees our product quality remains consistently stable and reliable, upholding our steadfast commitment to excellence.

Certifications

Packaging & Shipping

Donghong has forged strategic alliances with more than five prestigious 5A-level logistics companies, each boasting extensive years of transportation expertise. Our multifaceted logistics network, encompassing automobile, railway, port, and maritime options, ensures uninterrupted service even in the face of adverse weather or remote destinations. This comprehensive transportation strategy guarantees that every shipment reaches your site swiftly and reliably, offering you unmatched efficiency and peace of mind.

FAQ

1. Does your product meet international standards?
Our products proudly surpass international standards, having earned CE, BV, ISO, and WAR certifications. Each specification 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 comprehensive range of pipe products, fittings, packaging, and efficient shipping solutions. Our consultancy services encompass expert project advice, customized pipe system solutions, and tailored 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 facility and witness our product quality firsthand. We also conduct rigorous tests as per customer requests before finalizing orders. Moreover, we can provide pre-production samples for customer testing to ensure complete satisfaction and qualification before bulk production.