Pre-Insulated Steel Piping with Rigid Foam Lagging for Industrial Applications

• Application: Agricultural Irrigation, Chemical Transport, Industrial Processing, Oil and Gas Distribution, Wastewater Management, Water Supply, Base Oil, Derivatives, Industrial Lubricant
• certification: CE, ISO9001
• Connection Type: Welding/Socket
• Diameter: 400mm-1800mm
• Material: Carbon Steel
• Temperature Range: -20℃ to 80℃
• Model NO.: DH-The thermal insulation-BWGG
• 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 seamlessly integrating advanced materials with cutting-edge technology, these pre-insulated steel pipes are engineered to meet the highest standards of industrial performance, ensuring your operations are safeguarded with the utmost reliability and energy efficiency.

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 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. Our engineered solutions ensure secure, efficient, and reliable connections tailored for various industrial applications.

Flange connection

Flexible socket connection

Experience a comprehensive welding joint demonstration that ensures seamless integration and delivers robust, long-lasting performance. Our advanced welding techniques guarantee optimal durability and strength, ensuring your projects stand the test of time.

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), commonly known as Donghong Co., Ltd., is located in the culturally and historically significant city of Qufu, China—the birthplace of Confucius. As a pioneer in the engineering pipeline industry, we have established ourselves as a top-tier manufacturer, all-encompassing service provider, and general contractor. Our core expertise encompasses four pivotal segments of pipeline solutions: rainwater and sewage diversion, municipal services, industrial and mining applications, and major national engineering projects. At Donghong Co., Ltd., we are dedicated to creating a thriving industrial ecosystem that integrates design institutes, financial institutions, port logistics, construction firms, and a comprehensive network of upstream and downstream enterprises. Our ambitious vision aims 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 proud to have a vibrant team of over 200 R&D experts and an extensive portfolio of over 100 patents. Our spirit of innovation is fueled by 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, driving the industry forward and setting new standards 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 the Shanghai Stock Exchange.

Outstanding Technical Research and Development Capabilities
Our state-of-the-art national CNAS laboratory is outfitted with the most advanced testing technologies, enabling the innovation of new products, materials, and connection types. This rigorous testing process ensures our products consistently maintain stability and reliability, showcasing our unwavering commitment to excellence.

Certifications

Packaging & Shipping

Donghong has forged elite strategic partnerships with over five prestigious 5A-level logistics companies, all renowned for their extensive transportation expertise. Leveraging a sophisticated and versatile mix of automobile, railway, port, and shipping logistics, we deliver unmatched service even in the most extreme temperatures and challenging locations. Our comprehensive transportation strategy ensures that your orders are delivered promptly and efficiently to your site. We maintain rigorous standards of efficiency and reliability. With our meticulous packaging and shipping procedures, we protect the integrity and quality of our Pre-Insulated Steel Piping with Rigid Foam Lagging, ensuring they are ready for immediate installation upon arrival. Experience ultimate convenience and peace of mind with our exceptional shipping solutions.

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 provide an extensive range of pipe products, fittings, packaging, and seamless shipping solutions. Our consultancy services offer expert project consulting, innovative pipe system solutions, and detailed design recommendations. Additionally, as an engineering-focused enterprise, we excel in pipeline contracting, repair services, and free 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 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.