Pre-Insulated Steel Pipe with Rigid Foam Lagging for High Temp Applications

• 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 of our Pre-Insulated Steel Pipe with Rigid Foam Lagging for High Temp Applications is meticulously crafted from premium high-strength, high-toughness polyethylene material. Leveraging Shandong Donghong Pipe Industry Co., Ltd.'s groundbreaking polyethylene modification technology, this layer undergoes a sophisticated surface polarization process. This advanced technique dramatically enhances its adhesive compatibility with polyurethane, ensuring superior adhesion performance. The result is unmatched durability and remarkable efficiency in thermal insulation applications, positioning it as the ultimate solution for robust, long-lasting underground steam piping needs.

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: Meticulously crafted from premium seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Before thermal insulation, our pipes undergo rigorous mechanical rust removal to ensure a quality standard that meets or exceeds GB/T8923.1 Sa level 2.5. This guarantees unparalleled reliability and durability, making our pipes the gold standard in the industry.
2. Slepipe: Engineered with an exclusive blend of modified flame retardant and anti-static polyethylene resin, processed using state-of-the-art single screw extrusion technology. This results in pipes with exceptional impact resistance, superior isolation properties, and formidable corrosion resistance, perfectly suited for the most demanding applications.
3. Polyurethane Insulation Layer: We utilize cutting-edge, modified flame retardant polyurethane foam, injected under high pressure to fill the gap between the casing and the working steel pipe. This process 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. Eliminates the need for additional support, significantly reduces heat loss, and completely eradicates the 'support thermal bridge' phenomenon, greatly enhancing energy efficiency.
2. Offers remarkable strength and excellent toughness, combined with ease of welding and convenient construction. This ensures seamless integration into any project, providing both efficiency and durability.
3. Exhibits exceptionally low thermal conductivity along with robust waterproof and corrosion resistant properties. Ideal for direct burial in the ground or underwater applications, providing unparalleled versatility and reliability.
4. Ensures straightforward connection through flange or quick joint connections, simplifying the installation process and significantly reducing labor costs.
5. Boasts an impressive service life, enduring 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 meticulously designed connection methods that are engineered to amplify the efficiency and reliability of your operational processes, ensuring optimal performance.

Flange connection

Flexible socket connection

Experience a thorough welding joint demonstration that guarantees seamless integration and delivers robust, enduring performance for all your needs.

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. By choosing our solution, you are making a wise investment in cutting-edge technology, superior engineering, and sustainable infrastructure. These pipes are an invaluable asset for industrial and municipal applications alike.

Company Profile

Shandong Donghong Pipe Industry Co., Ltd. (stock code: 603856), affectionately known as Donghong Co., Ltd., is situated in the historically illustrious city of Qufu, China, the revered birthplace of Confucius. As a pioneer in the engineering pipeline industry, we distinguish ourselves as a premier manufacturer, a comprehensive service provider, and a general contractor. Our expertise encompasses four critical areas of specialized and bespoke pipeline solutions: rainwater and sewage diversion, municipal services, industrial and mining sectors, and key national engineering projects. At Donghong Co., Ltd., we are dedicated to fostering a vibrant industrial ecosystem that seamlessly integrates design institutes, financial institutions, port logistics, construction firms, and a robust network of upstream and downstream enterprises. Our visionary mission is to revolutionize the global pipeline industry with intelligent pipeline solutions that not only enhance quality of life but also ensure the enduring safety and reliability of pipeline transportation.

Donghong Co., Ltd. is driven by innovative excellence with a dynamic team of over 200 R&D experts and a prestigious collection of over 100 patents. Our innovation is fueled by national technology platforms, including our enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We lead the charge in digitalizing, informatizing, and intelligentizing pipeline engineering, setting new standards of excellence and propelling the industry to new heights.
In November 2017, Donghong Co., Ltd. celebrated a monumental achievement by becoming the first company in China's engineered composite piping systems sector to be listed on the main board of Shanghai, marking a significant milestone in our illustrious journey.

Outstanding Technical Research and Development Capabilities
Our state-of-the-art national CNAS laboratory is equipped with the latest testing technologies, driving the innovation of new products, materials, and connection types. Through rigorous testing, we ensure that our products consistently uphold the highest standards of stability and reliability, reflecting our steadfast commitment to excellence.

Certifications

Packaging & Shipping

Donghong has forged strategic alliances with over five elite 5A-level logistics companies, bringing a wealth of transportation expertise to the table. Our sophisticated logistics network encompasses a seamless integration of automobile, railway, port, and shipping channels, guaranteeing exceptional service regardless of extreme temperatures or challenging destinations. Through our comprehensive transportation strategy, we ensure timely and efficient delivery of our products directly to your site. Our meticulous packaging and shipping protocols are designed to preserve the integrity and quality of our Pre-Insulated Steel Pipes with Rigid Foam Lagging for High Temp Applications, ensuring they arrive in pristine condition and ready for immediate installation. Experience the convenience and peace of mind that comes with Donghong’s unwavering commitment to excellence in logistics and customer satisfaction.

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.