PVC Pipe Insulation with Ppu Pipe, Tube for Underground Systems

• 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 tubes with pre-insulated pipe systems ensure 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 boasts an avant-garde stent-free foaming technology that eradicates the stent effect responsible for considerable heat loss. The outer sheath is meticulously crafted from a unique, modified anti-static flame-retardant polyethylene material, produced through a singular spiral extruder extrusion process. This technique guarantees a flawless adhesion between the foamed insulation layer and the polyethylene exterior, ensuring the insulation pipe remains intact without delamination. The DHPI mining thermal insulation pipe is distinguished by its exceptional impact resistance, superior isolation attributes, and outstanding corrosion resistance.

1. Working Steel Pipe: Perfectly manufactured from seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Before insulation, each pipe undergoes a stringent mechanical rust removal process, adhering to a quality standard of no less than GB/T8923.1 Sa level 2.5.
2. Slepipe: Expertly designed with specially modified flame-retardant and anti-static polyethylene resin, processed through a single screw extrusion machine. This process bestows our pipes with superior impact resistance, excellent isolation capabilities, and formidable corrosion resistance.
3. Polyurethane Insulation Layer: Utilizing state-of-the-art technology, we inject modified flame-retardant polyurethane foam at high pressure to fill the space between the casing and the working steel pipe. This results in unparalleled insulation, characterized by minimal thermal conductivity, high compression strength, low water absorption, and an exceptional closure rate.

1. Our innovative system obviates the need for support structures, significantly diminishing heat loss and entirely eliminating the 'support thermal bridge' effect.
2. With their high strength and excellent toughness, our pipes facilitate easy welding and ensure convenient construction.
3. Featuring low thermal conductivity and robust waterproof and corrosion-resistant properties, our pipes are perfectly suited for direct burial in the ground or underwater applications.
4. Ensures seamless connection through either flange or quick joint connections.
5. Engineered for durability, our pipes promise a long service life, enduring extreme conditions from -20ºC to 120ºC for over 30 years.

Connection Method

Versatile Connection Techniques

Flange connection

Flexible socket connection

Exemplary Display of 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. As a premier engineering pipeline manufacturer, we stand out as a comprehensive service provider and trusted general contractor in pipeline engineering. Our expertise 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 formidable team of over 200 R&D professionals and holds an impressive portfolio of 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 vanguard 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 remarkable 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, equipped with cutting-edge testing equipment, facilitates the development of new products, materials, and innovative connection types. This rigorous testing ensures our product quality remains consistently stable and reliable, maintaining 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.

FAQ

1. Does your product meet international standards?
Our products proudly elevate international standards, boasting CE, BV, ISO, and WAR certifications, ensuring each specification surpasses the essential criteria. Share your specific national standard requirements, and we’ll validate or test to confirm compliance, guaranteeing unparalleled quality.

2. What kinds of services do you offer?
As a premier manufacturing factory, we offer an extensive range of pipe products, fittings, comprehensive packaging, and swift shipping solutions. Our consultancy expertise encompasses expert project advice, bespoke pipe system solutions, and specialized design recommendations tailored to your needs. Additionally, as an engineering-centric enterprise, we excel in pipeline contracting, professional repair services, and provide complimentary maintenance guidance, ensuring seamless project execution.

3. Do you support OEM/ODM services?
Absolutely. We provide an extensive array of customization options including materials, specifications, logos, packaging, and connection methods. Our skilled team delivers bespoke solutions tailored to distinctive project requirements, with numerous successful cases highlighting our exceptional service.

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

5. How can you guarantee the quality of your goods?
We warmly welcome customers to visit our facility to experience our premium product quality firsthand. Rigorous testing is conducted as per customer requests before finalizing orders. Additionally, we provide pre-production samples for customer testing, ensuring complete satisfaction and qualification before bulk production.