Pre-Insulated Steel Pipe with Water Thermal Cover and Polyurethane Foam 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 of our Pre-Insulated Steel Pipe with Water Thermal Cover and Polyurethane Foam Insulation is meticulously crafted from high-strength, high-toughness polyethylene material. With Shandong Donghong Pipe Industry Co., Ltd.'s revolutionary polyethylene modification technology, this layer undergoes a specialized surface polarization process. This advanced treatment significantly enhances its adhesive compatibility with polyurethane foam, ensuring superior adhesion and offering unmatched durability. Our innovative approach guarantees 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: Expertly forged from superior seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Prior to thermal insulation, each pipe undergoes stringent mechanical rust removal, meeting or exceeding the rigorous GB/T8923.1 Sa level 2.5 standards. This meticulous process guarantees unmatched reliability and durability, positioning our pipes as the industry benchmark.
2. Slepipe: Crafted using a unique formulation of advanced flame retardant and anti-static polyethylene resin, and manufactured with cutting-edge single screw extrusion technology. This results in pipes that offer exceptional impact resistance, enhanced isolation properties, and robust corrosion resistance, making them ideal for the most demanding applications.
3. Polyurethane Insulation Layer: We employ state-of-the-art, modified flame retardant polyurethane foam, injected under high pressure to effectively fill the gap between the casing and the working steel pipe. This advanced method ensures superior insulation performance, characterized by extremely low thermal conductivity, high compression strength, minimal water absorption, and an outstanding closure rate, delivering optimal thermal efficiency.

1. Eliminates the need for additional support structures, drastically reduces heat loss, and eradicates the 'support thermal bridge' phenomenon, significantly enhancing overall energy efficiency.
2. Provides exceptional strength and outstanding toughness, combined with easy weldability and convenient construction. This ensures seamless incorporation into any project, enhancing both efficiency and durability.
3. Features remarkably low thermal conductivity along with robust waterproof and corrosion-resistant properties. Perfect for direct burial in the ground or underwater applications, offering unparalleled versatility and reliability.
4. Ensures effortless connection through flange or quick joint connections, streamlining the installation process and significantly reducing labor costs.
5. Promises an impressive service life, capable of withstanding challenging environments with temperatures ranging from -20ºC to 120ºC for over 30 years, ensuring long-term performance and dependability.

Connection Method

Uncover a diverse array of expertly crafted connection methods, each meticulously designed to elevate the efficiency and dependability of your operational processes, ensuring peak performance and reliability.

Flange connection

Flexible socket connection

Immerse yourself in an all-encompassing welding joint demonstration that ensures seamless integration, providing 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, 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. Our pre-insulated steel pipes with water thermal cover and polyurethane foam insulation represent the pinnacle of innovation, tailored to meet the rigorous demands of modern infrastructure projects. Elevate your projects with our high-quality, durable, and efficient insulation solutions.

Company Profile

Shandong Donghong Pipe Industry Co., Ltd. (stock code: 603856), also known as Donghong Co., Ltd., is proudly rooted in the historic city of Qufu, China, the revered birthplace of Confucius. A true pioneer in the engineering pipeline sector, we are renowned as a premier manufacturer, comprehensive service provider, and general contractor. Our expertise encompasses four critical categories of specialized pipeline solutions: rainwater and sewage diversion, municipal services, industrial and mining sectors, and major national engineering projects. At Donghong Co., Ltd., we are dedicated to cultivating a dynamic industrial ecosystem, integrating design institutes, financial institutions, port logistics, construction firms, and a network of upstream and downstream enterprises. Our visionary commitment drives us to revolutionize the global pipeline industry with intelligent solutions that enhance quality of life and ensure the enduring safety of pipeline transportation.

Donghong Co., Ltd. is powered by an energetic team of over 200 R&D experts and holds an impressive portfolio of over 100 patents. Our innovation is driven 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 industry standards and propelling the sector to new heights 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.

Outstanding Technical Research and Development Capabilities
Our state-of-the-art CNAS laboratory is equipped with the latest testing technologies, spearheading the innovation of new products, materials, and connection types. Our rigorous testing protocols ensure that our products consistently meet the highest standards of stability and reliability, underscoring our commitment to unparalleled 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 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.