Pre-Insulated Steel Pipe with Water Pipe Thermal Cover and HDPE Jacket

• 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
• Connection Type: Welding/Socket
• 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 the Pre-Insulated Steel Pipe with Water Pipe Thermal Cover and HDPE Jacket 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. This advanced construction makes the Pre-Insulated Steel Pipe with Water Pipe Thermal Cover and HDPE Jacket 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: Meticulously crafted from premium-grade seamless steel pipe, spiral welded pipe, and straight seam welded pipe. Our pipes undergo rigorous mechanical rust removal before thermal insulation to meet or exceed the stringent GB/T8923.1 Sa level 2.5 standards. This process 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 innovation results in pipes with exceptional impact resistance, superior isolation properties, and formidable corrosion resistance, making them perfectly suited for the most demanding applications.
3. Polyurethane Insulation Layer: Utilizing cutting-edge modified flame retardant polyurethane foam, we inject it under high pressure to perfectly fill the gap between the casing and the working steel pipe. This method ensures superior insulation, characterized by extremely low thermal conductivity, high compression strength, minimal water absorption, and an impressive closure rate, guaranteeing optimal thermal performance.

1. Our system eliminates the need for additional support, significantly reduces heat loss, and completely eradicates the 'support thermal bridge' phenomenon, thus greatly enhancing energy efficiency.
2. Our pipes offer 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. With exceptionally low thermal conductivity and robust waterproof and corrosion resistance properties, our pipes are ideal for direct burial in the ground or underwater applications, offering unparalleled versatility and reliability.
4. Our design ensures straightforward connection through flange or quick joint connections, simplifying the installation process and significantly reducing labor costs.
5. Our pipes boast an impressive service life, capable of enduring challenging environments, withstanding temperatures ranging from -20ºC to 120ºC for over 30 years, 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

Experience a comprehensive welding joint demonstration that ensures seamless integration and delivers robust, long-lasting 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), also known as Donghong Co., Ltd., is proudly situated in Qufu, China, the famed birthplace of Confucius. As a pioneering force in the engineering pipeline industry, we are distinguished as a leading manufacturer, comprehensive service provider, and general contractor. Our proficiency extends across four critical categories of specialized and bespoke pipeline solutions: rainwater and sewage diversion, municipal services, industrial and mining sectors, and pivotal national engineering projects. At Donghong Co., Ltd., we are dedicated to fostering an integrated industrial ecosystem that includes design institutes, financial institutions, port logistics, construction enterprises, and a network of upstream and downstream partners. Our forward-thinking approach is dedicated to revolutionizing the global pipeline industry. Our mission is to lead with advanced pipeline solutions that enhance living standards and ensure the enduring safety of pipeline transportation.

Donghong Co., Ltd. prides itself on a robust team of over 200 R&D experts and an impressive portfolio of over 100 patents. Our innovative spirit is driven by national technology platforms, such as our enterprise technology center, CNAS laboratory, academician expert workstation, and post-doctoral workstation. We are at the cutting edge of digitalizing, informatizing, and intelligentizing pipeline engineering, pushing the industry forward and setting new standards of excellence.
In November 2017, Donghong Co., Ltd. achieved a significant 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 outfitted with the latest testing technologies, driving the innovation of new products, materials, and connection types. This rigorous testing guarantees that our products maintain consistent stability and reliability, showcasing our unwavering commitment to excellence.

Certifications

Packaging & Shipping

Donghong has forged strategic alliances with over five elite 5A-level logistics companies, showcasing vast expertise in transportation. By harnessing a versatile mix of automobile, railway, port, and shipping logistics, we deliver service excellence, regardless of extreme temperatures or remote locations. Our robust transportation strategy ensures punctual delivery to your site, upholding unmatched efficiency and reliability. With a meticulous approach to packaging and shipping, we protect the integrity and quality of our Pre-Insulated Steel Pipes with Water Pipe Thermal Cover and HDPE Jacket, ensuring they are ready for immediate installation upon arrival, providing you with 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.