Pre-Insulated Steel Pipe with Rigid Foam Lagging and HDPE Jacket for 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: Crafted with precision from premium seamless steel pipe, spiral welded pipe, and straight seam welded pipe, our working steel pipes undergo rigorous mechanical rust removal before thermal insulation. Meeting or exceeding GB/T8923.1 Sa level 2.5 standards, these pipes offer unmatched reliability and durability, setting the industry benchmark.
2. Slepipe: Designed with a proprietary blend of modified flame retardant and anti-static polyethylene resin, our Slepipe is processed using advanced single screw extrusion technology. This results in pipes with outstanding impact resistance, superior isolation properties, and formidable corrosion resistance, ideal for the most demanding applications.
3. Polyurethane Insulation Layer: Utilizing cutting-edge, modified flame retardant polyurethane foam, we inject the insulation under high pressure to fill the gap between the casing and the working steel pipe. This ensures superior insulation with 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 resistance 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 connection methods meticulously designed to amplify the efficiency and reliability of your operational processes.

Flange connection

Flexible socket connection

Immerse yourself in a thorough welding joint demonstration that guarantees seamless integration and offers unparalleled, enduring performance.

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), renowned as Donghong Co., Ltd., proudly operates from the culturally rich city of Qufu, China, the birthplace of Confucius. As an industry pioneer in the engineering pipeline sector, we shine as a leading manufacturer, all-encompassing service provider, and trusted general contractor. Our proficiency extends across four core areas of specialized pipeline solutions: rainwater and sewage management, municipal services, industrial and mining sectors, and major national infrastructure projects. At Donghong Co., Ltd., our dedication is to foster a dynamic industrial ecosystem that seamlessly integrates design institutes, financial entities, port logistics, construction firms, and a robust network of upstream and downstream enterprises. Our ambitious vision aims to revolutionize the global pipeline industry with our smart pipeline solutions, enhancing quality of life and ensuring the enduring safety of pipeline transportation.

Donghong Co., Ltd. is empowered by a vibrant team of over 200 R&D professionals and proudly holds more than 100 patents. Our pioneering spirit 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 the digitalization, informatization, and intelligentization of pipeline engineering, setting new industry standards and propelling the sector forward with unparalleled excellence.
In November 2017, Donghong Co., Ltd. achieved a historic milestone by becoming the first enterprise in China's engineered composite piping systems sector to be listed on the main board of Shanghai. This monumental achievement underscores our leadership and innovative prowess in the industry.

Outstanding Technical Research and Development Capabilities
Our state-of-the-art national CNAS laboratory is outfitted with the most advanced testing technologies, enabling the continuous innovation of new products, materials, and connection methodologies. Rigorous testing ensures our products exhibit unwavering stability and reliability, mirroring 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 Steel Pipe with Rigid Foam Lagging and HDPE Jacket for Insulation, 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 rigorous CE, BV, ISO, and WAR certifications. We can assure you of the highest quality and reliability by verifying or testing compliance with any specified national standard you require.

2. What kinds of services do you offer?
As a leading manufacturer, we provide an extensive array of pipe products, fittings, packaging, and seamless shipping solutions. Our expert consultancy services include innovative pipe system solutions, detailed design recommendations, and project consulting. Additionally, we excel in pipeline contracting, repair services, and offer complimentary maintenance guidance, ensuring comprehensive support for all your needs.

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

4. What are your terms of payment?
We provide flexible and convenient payment options, accepting T/T (Telegraphic Transfer) or L/C (Letter of Credit) at sight.

5. How can you guarantee the quality of your goods?
We warmly invite all customers to visit our company and verify our goods firsthand. We can also conduct rigorous tests upon request before placing orders. Additionally, samples can be sent before bulk production for testing and approval, ensuring the highest quality standards and your satisfaction.