Pre-Insulated Steel Pipe with High Temp Polyurethane Foam for Steam Insulation

• 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
• 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 is meticulously crafted from high-strength, high-toughness polyethylene material. Utilizing Shandong Donghong Pipe Industry Co., Ltd.'s revolutionary polyethylene modification technology, this layer undergoes a surface polarization process that significantly enhances its adhesive compatibility with polyurethane. This innovative approach ensures superior adhesion performance, offering unmatched durability and unparalleled efficiency in thermal insulation applications, making it the prime choice for robust, long-lasting underground steam piping solutions.

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: Our pipes are meticulously crafted from premium seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Before thermal insulation, each pipe undergoes rigorous mechanical rust removal to meet or exceed the stringent GB/T8923.1 Sa level 2.5 standards. This process ensures unparalleled reliability and durability, making our pipes the gold standard in the industry.
2. Slepipe: Our innovative Slepipe is engineered with an exclusive blend of modified flame retardant and anti-static polyethylene resin, processed using state-of-the-art single screw extrusion technology. The result is a pipe with exceptional impact resistance, superior isolation properties, and formidable corrosion resistance—perfectly suited for the most demanding applications.
3. Polyurethane Insulation Layer: We employ cutting-edge, modified flame retardant polyurethane foam, injected under high pressure to fill the gap between the casing and the working steel pipe. This ensures a superior insulation effect characterized by exceptionally low thermal conductivity, high compression strength, minimal water absorption, and an impressive closure rate, guaranteeing optimal thermal performance.

1. Energy Efficiency: Our pre-insulated steel pipes eliminate the need for additional support, significantly reduce heat loss, and completely eradicate the 'support thermal bridge' phenomenon. This greatly enhances energy efficiency.
2. Strength and Toughness: Offering remarkable strength and excellent toughness, our pipes are easy to weld and convenient to construct. This ensures seamless integration into any project, providing both efficiency and durability.
3. Versatility and Reliability: Our pipes exhibit exceptionally low thermal conductivity along with robust waterproof and corrosion resistance properties. Ideal for direct burial in the ground or underwater applications, they provide unparalleled versatility and reliability.
4. Simplified Installation: Our pipes ensure straightforward connection through flange or quick joint connections. This simplifies the installation process and significantly reduces labor costs.
5. Longevity: Boasting an impressive service life, our pipes endure challenging environments with temperatures ranging from -20ºC to 120ºC for over 30 years, thereby ensuring long-term performance and reliability.

Connection Method

Discover a diverse array of connection methods meticulously designed to amplify the efficiency and reliability of your operational processes. Our advanced techniques ensure optimal performance, enhancing the longevity and dependability of your system.

Flange connection

Flexible socket connection

Experience a comprehensive welding joint demonstration that ensures seamless integration and delivers robust, long-lasting performance. Our expert engineering guarantees the strength and durability essential for superior operational continuity.

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. Specifically designed to excel in the most demanding conditions, these pipes ensure longevity and efficiency, making them an invaluable asset for industrial and municipal applications alike. 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), or Donghong Co., Ltd., proudly anchors its legacy in the culturally rich city of Qufu, China, the revered birthplace of Confucius. As a pioneering stalwart in the engineering pipeline arena, we distinguish ourselves as an esteemed manufacturer, all-inclusive service provider, and authoritative general contractor. Our proficiency encompasses four crucial categories of bespoke pipeline solutions: rainwater and sewage management, municipal services, industrial and mining applications, and prominent national engineering projects. At Donghong Co., Ltd., we are devoted to forging a thriving industrial ecosystem that seamlessly integrates design institutes, financial entities, port logistics, construction firms, and a vast network of upstream and downstream enterprises. Our visionary ambition is to revolutionize the global pipeline industry. We are dedicated to pioneering intelligent pipeline solutions that not only enhance the quality of life but also ensure the enduring safety and reliability of pipeline transportation.

Donghong Co., Ltd. is fortified by an energetic team of over 200 R&D professionals and proudly holds an impressive portfolio of over 100 patents. Our drive for innovation is fueled by esteemed national technology platforms, including our enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are leaders in the digitalization, informatization, and intelligentization of pipeline engineering, propelling the industry to new heights and setting unparalleled standards of excellence.
In November 2017, Donghong Co., Ltd. celebrated a historic milestone, becoming the first enterprise in China's engineered composite piping systems sector to secure a listing on the main board of Shanghai.

Outstanding Technical Research and Development Capabilities
Our state-of-the-art national CNAS laboratory is outfitted with the most advanced testing technologies, driving innovation in new products, materials, and connection methodologies. This rigorous testing guarantees that our products consistently exhibit stability and reliability, underscoring our steadfast 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 pipes, making them ready for immediate installation upon arrival, providing you with the ultimate convenience and peace of mind. At Shandong Donghong Pipe Industry Co., Ltd., our Pre-Insulated Steel Pipe with High Temp Polyurethane Foam for Steam Insulation undergoes stringent packaging protocols designed to protect the product from any potential damage during transit. Each pipe is carefully wrapped and secured to ensure it remains in pristine condition, no matter the journey's complexity. By leveraging our sophisticated logistics network, we promise not just delivery, but a seamless experience that underscores our commitment to excellence and customer satisfaction. Trust Donghong for a flawless, hassle-free shipping experience every time.

FAQ

1. Does your product meet international standards?
Our products have not only successfully passed CE, BV, ISO, and WAR certifications but have also exceeded all required standards. Specify the national standard you need, and we will either verify or test it to ensure compliance, thus guaranteeing the highest quality and reliability.

2. What kinds of services do you offer?
As a manufacturing powerhouse, we offer an extensive range of pipe products, fittings, packaging, and seamless shipping solutions. In addition, our consultancy services provide expert project consulting, innovative pipe system solutions, and detailed design recommendations. Furthermore, as an engineering-focused enterprise, we excel in pipeline contracting, repair services, and free maintenance guidance, ensuring comprehensive support for all your requirements.

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

4. What are your terms of payment?
We accept T/T (Telegraphic Transfer) or L/C (Letter of Credit) at sight, providing 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.