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Product Introduction: Heat Resisting Stainless Steel Seamless Tubes

In the heart of modern industrial applications, heat resisting stainless steel seamless tubes have emerged as pivotal components, particularly for environments that demand exceptional durability and resilience against elevated temperatures. This comprehensive guide explores the features, applications, and industry standards associated with these advanced stainless steel products, specifically focusing on grades such as 310S, 309S, 304H, 321H, and 347H.

Overview of Heat Resisting Stainless Steel Seamless Tubes

Heat resisting stainless steel seamless tubes are designed specifically to withstand extreme temperature conditions. These tubes excel in environments where the temperature can easily surpass 550°C (1022°F), making them indispensable in industries such as power generation, petrochemical, and oil refining. The unique properties of these materials ensure longevity and performance in high-stress scenarios.

Heat Resistance Performance

The primary advantage of using heat resisting stainless steel is its enhanced thermal stability, which allows for usage in steam environments and elevated temperature applications:

1. 310S Stainless Steel:

   • Temperature Range: Suitable for up to 1149°C (2100°F).
   • Characteristics: Offers an excellent balance of strength and corrosion resistance, surpassing the capabilities of grades such as 304 and 309 in most environments.

2. 309S Stainless Steel:

   • Temperature Capacity: Maximum continuous service temperature of 1100°C (2012°F), with intermittent use up to 980°C (1836°F).
   • Properties: This chromium-nickel grade is high in corrosion resistance, and its low carbon content minimizes precipitation during welding processes.

3. 304H Stainless Steel:

   • Temperature Tolerance: Performs effectively at temperatures above 427°C (800°F).
   • Benefits: The controlled carbon content enhances high-temperature strength, making it ideal for applications that require durability and resistance to oxidation.

4. 321H Stainless Steel:

   • Temperature Resistance: Excellent performance in the range of 427°C to 816°C (800°F to 1500°F).
   • Features: Notably resistant to intergranular corrosion, especially following exposure to high temperatures that can lead to chromium carbide precipitation.

5. 347H Stainless Steel:

   • Maximum Usage Temperature: Up to 816°C (1500°F).
   • Advantages: This grade is particularly beneficial for pressure vessel applications in compliance with ASME Boiler and Pressure Vessel Code standards due to its elevated temperature performance.

Key Specifications and Standards

When selecting heat resisting stainless steel tubes, adherence to industry standards is critical. Our tubes meet various internationally recognized specifications, ensuring quality and compatibility across applications:

• Outside Diameter: 0.5mm to 550mm, catering to a diverse range of requirements.
• Wall Thickness: Available from 0.05mm to 80mm, providing flexibility in design.

Relevant Standards include:

• EN 10216-5: European standard specifying seamless steel tubes for pressure purposes.
• DIN 17456, 17458, and 17459: German standards detailing specific requirements for high-temperature applications.
• GB/T14975; T14976; T13296; GB5310: Chinese standards that outline manufacturing and material specifications.
• ASTM A213, A269, A312, A511, A789, A790: American standards governing a variety of seamless and welded stainless steel tube specifications.
• JIS G3459; G3463: Japanese Industrial Standards addressing stainless steel tubes for piping and other applications.
• GOST 9940; GOST 9941: Russian standards related to specifications of steel tubes intended for high-temperature services.

Applications

Heat resisting stainless steel seamless tubes are predominantly used in sectors requiring high-performance materials capable of enduring severe conditions. Notable applications include:

• Boilers: Essential for steam generation where high efficiency and durability are paramount.
• Heat Exchangers: Utilized extensively in power plants and processing industries.
• Pipelines: Effective for transporting fluids in high-temperature and high-pressure environments.
• Furnaces: Employed in industrial furnaces for thermal processing due to their resistance to oxidation and scaling.

Conclusion

Heat resisting stainless steel seamless tubes represent a confluence of strength, thermal resilience, and corrosion resistance, making them ideal for various demanding industrial applications. With a variety of grades tailored to specific temperature ranges and performance requirements, these tubes are engineered to meet stringent industry standards. Their application in critical systems not only enhances efficiency but also ensures safety and reliability in operations. For optimal results, consult with material engineers to select the appropriate grade to meet your specific application needs, ensuring compliance with relevant standards and specifications.