ASTM A213 T9 Alloy Steel Studded Fin Pipe with 13Cr Studs for Radiant Coil Applications

Studded fin pipes are widely used in radiant coils for high-temperature and high-pressure environments such as furnaces, heaters, and boilers. ASTM A213 T9 alloy steel with 13% chromium (13Cr) studs ensures excellent mechanical strength, thermal efficiency, and resistance to corrosion and oxidation, making it ideal for demanding applications.

1. Material Specification

Base Tube Material:

• Standard: ASTM A213
• Grade: T9 Alloy Steel
• Type: Seamless ferritic alloy steel
• Applications: Used in high-temperature services, including heat exchangers and boiler systems.

Stud Material:

• Material: 13Cr (13% Chromium)
• Purpose: Improves heat transfer and resists oxidation and corrosion at elevated temperatures.

2. Chemical Composition

ASTM A213 T9 Base Tube:

13Cr Studs:

3. Mechanical Properties

4. Features of Studded Fin Pipe

1. Enhanced Heat Transfer:

   • The 13Cr studs provide additional surface area, significantly improving heat transfer efficiency.
   • Suitable for radiant sections in furnaces where high thermal conductivity is crucial.

2. High-Temperature Resistance:

   • ASTM A213 T9 alloy steel withstands elevated temperatures up to 650°C.
   • 13Cr studs resist oxidation and scaling, even in aggressive environments.

3. Corrosion Resistance:

   • Chromium content in the base tube and studs enhances resistance to corrosion in harsh environments, including exposure to flue gases and combustion byproducts.

4. Durability:

   • Strong mechanical bonding between the base tube and studs ensures long-term performance under thermal cycling and vibration.

5. Applications

• Radiant Coils in Furnaces and Heaters:

  • Used in radiant sections to absorb heat from combustion gases and transfer it to process fluids.

• Boiler Systems:

  • Ideal for water tube boilers in power plants and refineries.

• Petrochemical and Refining Industries:

  • Commonly used in process heaters, reformers, and cracking furnaces.

• High-Temperature Heat Exchangers:

  • Suitable for heat recovery applications in industrial processes.

6. Advantages

• Energy Efficiency: Improves thermal efficiency by maximizing heat transfer in radiant sections.
• Longevity: Combines high-temperature resistance and corrosion resistance for long-term durability.
• Cost-Effective: Reduces downtime and maintenance costs by providing a reliable and robust heat exchange solution.
• Versatility: Suitable for various high-temperature industrial processes.