Pre-Insulated Steel Pipe Systems with High-Density Polyurethane Foam Insulation Jacket

• Customization: Available
• Application: Agricultural Irrigation, Chemical Transport, Industrial Processing, Oil and Gas Distribution, Wastewater Management, Water Supply, Base Oil, Derivatives, Industrial Lubricant
• certification: CE, ISO9001
• Model NO.: DH-The thermal insulation-BWGG
• Connection Type: Welding/Socket
• Diameter: 400mm-1800mm
• Material: Carbon Steel
• 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 %
• Obturator Ratio: 95%
• Shear Strength: 149-195 Kpa, 170ºC, 1450h
• Usage: Asphalt, Lubricants, Solvent, Fuel, Petroleum Coke
• Sheathing Tube: PE
• Main Insulation: Polyurethane Foam
• Working Tubes: Q235B, 355b, 20# Oryour Request
• Connection Method: Welding or Socket Type
• Temperature Classification: High Temperature Piping
• MPa Classfication: High Pressure Piping
• Standard: ASTM, API, CE
• 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

The outer protective layer of our Pre-Insulated Steel Pipe Systems with High-Density Polyurethane Foam Insulation Jacket is meticulously crafted from high-strength, high-toughness polyethylene material. Utilizing Shandong Donghong Pipe Industry Co., Ltd.'s groundbreaking polyethylene modification technology, this layer undergoes an advanced surface polarization process that significantly enhances its adhesive compatibility with polyurethane. This state-of-the-art approach ensures exceptional adhesion performance, offering unmatched durability and unparalleled efficiency in thermal insulation applications. Our innovative solutions make it the prime choice for robust, long-lasting underground steam piping solutions, providing superior performance and reliability in even the most demanding environments.

Working Steel Pipe Diameter mm	Outer Sheath Diameter mm	Minimum thickness of outer sheath mm	Insulation layer thickness mm
426	494-554	4.0	30-60
478	547-607	4.5	30-60
529	598-658	4.5	30-60
630	700-760	5.0	30-60
720	790-850	5.0	30-60
820	891-951	5.5	30-60
920	992-1052	6.0	30-60
1020	1093-1153	6.5	30-60
1120	1194-1254	7.0	30-60
1220	1316-1436	8.0	40-100
1420	1538-1678	9.0	50-120
1620	1760-1880	10.0	60-120
1820	1960-2080	10.0	60-120
Note: can be customized as customer's needs.

Our Advantages

1. Working Steel Pipe: Crafted with precision from top-tier seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Prior to thermal insulation, our pipes undergo stringent mechanical rust removal, meeting or surpassing the GB/T8923.1 Sa level 2.5 standards. This meticulous process ensures unmatched reliability and durability, establishing our pipes as the industry benchmark.
2. Slepipe: Designed with a unique blend of modified flame retardant and anti-static polyethylene resin, processed through advanced single screw extrusion technology. This innovation yields pipes with outstanding impact resistance, superior isolation properties, and remarkable corrosion resistance, making them ideal for the most challenging applications.
3. Polyurethane Insulation Layer: Utilizing state-of-the-art modified flame retardant polyurethane foam, injected under high pressure to perfectly fill the gap between the casing and the working steel pipe. This method guarantees exceptional insulation, characterized by ultra-low thermal conductivity, high compression strength, minimal water absorption, and an impressive closure rate, ensuring optimal thermal performance.

1. Eliminates the need for additional support, dramatically reduces heat loss, and completely eradicates the 'support thermal bridge' phenomenon, thereby significantly enhancing energy efficiency.
2. Offers remarkable strength and outstanding toughness, coupled with ease of welding and convenient construction. This ensures seamless integration into any project, providing both efficiency and lasting durability.
3. Exhibits incredibly low thermal conductivity along with robust waterproof and corrosion-resistant properties. Perfect for direct burial in the ground or underwater applications, offering unrivaled versatility and reliability.
4. Ensures straightforward connection through flange or quick joint connections, streamlining the installation process and significantly reducing labor costs.
5. Boasts an extraordinary service life, enduring harsh environments with temperatures ranging from -20ºC to 120ºC for over 30 years, ensuring long-term performance and dependability.

Connection Method

Discover a diverse array of connection methods meticulously designed to amplify the efficiency and reliability of your operational processes.

Flange connection

Flexible socket connection

Experience a comprehensive welding joint demonstration that ensures seamless integration and delivers robust, long-lasting performance.

Appliation Cases

Insulated steel pipes are indispensable in liquid and gas transmission pipe insulation projects across a wide range of 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, with significantly reduced construction costs. Specifically designed to excel in the most demanding conditions, these pipes ensure longevity and efficiency, making them an invaluable asset for both industrial and municipal applications. By choosing our solution, you are making a wise investment in cutting-edge technology, superior engineering, and sustainable infrastructure.

Company Profile

Shandong Donghong Pipe Industry Co., Ltd. (stock code: 603856), also known as Donghong Co., Ltd., is anchored in the historically rich city of Qufu, China, the revered birthplace of Confucius. As a pioneering force in the engineering pipeline sector, we distinguish ourselves as a leading manufacturer, comprehensive service provider, and general contractor. Our expertise encompasses four critical categories of specialized and custom-tailored pipeline solutions: rainwater and sewage diversion, municipal services, industrial and mining sectors, and significant national engineering projects. At Donghong Co., Ltd., we are devoted to cultivating a vibrant industrial ecosystem that seamlessly integrates design institutes, financial institutions, port logistics, construction firms, and an extensive network of upstream and downstream enterprises. Our visionary approach is dedicated to revolutionizing the global pipeline industry. Our mission is to spearhead the industry with intelligent pipeline solutions that not only enhance the quality of life but also ensure the enduring safety and efficiency of pipeline transportation.

Donghong Co., Ltd. prides itself on a dynamic team of over 200 R&D experts and an impressive portfolio of over 100 patents. Our innovation-driven culture is supported by national technology platforms, including our enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are at the cutting edge of digitalizing, informatizing, and intelligentizing pipeline engineering, driving the industry forward and setting new standards of excellence.
In November 2017, Donghong Co., Ltd. achieved a historic milestone by becoming the first company in China's engineered composite piping systems sector to be listed on the main board of Shanghai, solidifying our leadership and commitment to innovation.

Outstanding Technical Research and Development Capabilities
Our state-of-the-art national CNAS laboratory is equipped with the latest testing technologies, enabling the development of innovative products, materials, and connection types. This rigorous testing ensures our products consistently offer superior stability and reliability, epitomizing our unwavering commitment to excellence.

Certifications

Packaging & Shipping

Donghong has established strategic partnerships with over five elite 5A-level logistics companies, boasting extensive expertise in transportation. Utilizing a dynamic blend of automobile, railway, port, and shipping logistics, we ensure unparalleled service, regardless of extreme temperatures or challenging locations. Our robust transportation strategy guarantees timely delivery to your site, maintaining the highest standards of efficiency and reliability. With a meticulous approach to packaging and shipping, we safeguard the integrity and quality of our Pre-Insulated Steel Pipe Systems with High-Density Polyurethane Foam Insulation Jacket, making them ready for immediate installation upon arrival, providing you with the ultimate convenience and peace of mind.

FAQ

1. Does your product meet international standards?
Our products not only meet but exceed international standards, having successfully passed stringent CE, BV, ISO, and WAR certifications. Specify the national standard you need, and we will verify or test it to ensure compliance, guaranteeing unparalleled quality and reliability.

2. What kinds of services do you offer?
As a leading manufacturer, we provide a comprehensive range of pipe products, fittings, and packaging solutions, coupled with seamless shipping. Our consultancy services offer expert project advice, cutting-edge pipe system solutions, and detailed design recommendations. As an engineering-centric enterprise, we excel in pipeline contracting, repairs, and offer free maintenance guidance, ensuring you receive holistic support for all your requirements.

3. Do you support OEM/ODM services?
Absolutely, we offer extensive customization in materials, specifications, logos, packaging, and connection methods. Our dedicated team delivers tailored solutions for unique projects, backed by numerous successful cases that showcase our exceptional service.

4. What are your terms of payment?
We accept T/T (Telegraphic Transfer) or L/C (Letter of Credit) at sight, offering flexibility and convenience in our payment options.

5. How can you guarantee the quality of your goods?
We warmly invite all customers to visit our company and inspect our goods firsthand. We are also capable of conducting rigorous tests as per your request before the order. Additionally, we can send samples before bulk production for your testing and approval, ensuring the highest quality standards are met for your satisfaction.