Pre-Insulated Steel Pipe with Foam Core and HDPE Jacket for Thermal 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. By integrating cutting-edge advancements and exceptional materials, this pre-insulated steel pipe with foam core and HDPE jacket stands as a testament to innovation and quality, setting a benchmark in the thermal insulation industry for reliability and performance.

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: Expertly constructed from top-tier seamless steel, spiral welded, and straight seam welded pipes, our working steel pipes are subjected to rigorous mechanical rust removal processes before thermal insulation. Adhering to the GB/T8923.1 Sa level 2.5 standard, we ensure exceptional reliability and durability. These pipes set the industry's gold standard.
2. Slepipe: Crafted using a unique blend of modified flame retardant and anti-static polyethylene resin, our Slepipe is manufactured with cutting-edge single screw extrusion technology. This produces pipes with extraordinary impact resistance, superior isolation capabilities, and powerful corrosion resistance, ideal for the most demanding operational conditions.
3. Polyurethane Insulation Layer: We leverage advanced, modified flame retardant polyurethane foam, injected under high pressure to precisely fill the space between the casing and the working steel pipe. The result is a premier insulation layer with exceptionally low thermal conductivity, high compression strength, minimal water absorption, and an outstanding closure rate, ensuring peak thermal performance.

1. Our design eradicates the need for additional support, significantly curtails heat loss, and completely eliminates the 'support thermal bridge' phenomenon. This innovation dramatically enhances energy efficiency.
2. Featuring impressive strength and excellent toughness, our pipes are easy to weld and convenient to construct. This ensures seamless integration into any project, delivering both efficiency and long-lasting durability.
3. With exceptionally low thermal conductivity, as well as strong waterproof and corrosion resistance properties, our pipes are ideal for direct burial in the ground or underwater. They offer unparalleled versatility and reliability.
4. Ensuring easy connections through flange or quick joint connections, our system simplifies the installation process, significantly cutting down on labor costs.
5. Our pipes offer an impressive service life, enduring extreme environments with temperatures ranging from -20ºC to 120ºC for over 30 years, thereby guaranteeing 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, ensuring unparalleled performance.

Flange connection

Flexible socket connection

Experience a comprehensive welding joint demonstration, seamlessly integrating components for robust and long-lasting performance that meets the highest standards.

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), also known as Donghong Co., Ltd., is proudly headquartered in the historically rich city of Qufu, China, the hometown of Confucius. As a pioneering force in the engineering pipeline sector, we are distinguished as a premier manufacturer, comprehensive service provider, and general contractor. Our expertise spans four pivotal categories of specialized and tailored pipeline solutions: rainwater and sewage diversion, municipal services, industrial and mining sectors, and key national engineering projects. At Donghong Co., Ltd., we are committed to creating a vibrant industrial ecosystem that integrates design institutes, financial institutions, port logistics, construction firms, and a network of upstream and downstream enterprises. Our visionary approach aims to revolutionize the global pipeline industry. Our mission is to lead with intelligent pipeline solutions that elevate the quality of life while guaranteeing the long-lasting safety of pipeline transportation.

Donghong Co., Ltd. boasts a dynamic team of over 200 R&D experts and holds an impressive portfolio of over 100 patents. Our innovative spirit is powered by national technology platforms, including our enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are at the forefront 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 monumental milestone by becoming the first company in China's engineered composite piping systems sector to be listed on the main board of Shanghai.

Outstanding Technical Research and Development Capabilities
Our state-of-the-art national CNAS laboratory is equipped with the latest testing technologies, facilitating the innovation of new products, materials, and connection types. This stringent testing ensures that our products maintain consistent stability and reliability, reflecting 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 pipes, 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 have not only triumphantly passed CE, BV, ISO, and WAR certifications but have also surpassed all required standards. Specify the national standard you need, and we will either verify or test it to ensure compliance, thereby guaranteeing the highest echelon of 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. Furthermore, our consultancy services provide expert project consulting, innovative pipe system solutions, and detailed design recommendations. 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 adept at delivering bespoke solutions for your unique projects, backed by numerous successful cases that underscore 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 prior to bulk production for your testing and approval, ensuring the highest quality standards are met for your satisfaction.