Alloy Steel Seamless Pipe, ASTM A335 P22, Solid Fin Tube with 11-13Cr Fins for Convection Coil

Product Overview

The ASTM A335 P22 Alloy Steel Seamless Pipe with 11-13% chromium fins is specifically designed for high-temperature heat transfer applications in convection coils within furnaces, heaters, and power plant systems. The seamless base pipe is made of P22 alloy steel, offering excellent strength and creep resistance under high pressure and temperature. The 11-13Cr fins provide enhanced corrosion resistance, especially in flue gas environments, making it ideal for high-temperature heat exchangers and economizers.

Chemical Composition – ASTM A335 P22 (Base Tube)

Fins – 11-13Cr Steel Material

Mechanical Properties – ASTM A335 P22

Advantages of P22 Alloy Steel with 11-13Cr Fins

• High-Temperature Strength
  P22 alloy steel provides excellent creep resistance and high-temperature stability, making it ideal for furnace and high-temperature heat exchanger systems.

• Enhanced Corrosion Resistance
  The 11-13% chromium fins offer outstanding oxidation resistance and corrosion resistance in high-temperature flue gas environments, extending the service life of the convection coil.

• Improved Heat Transfer
  Fins increase the external surface area for efficient heat dissipation, improving the overall thermal efficiency of convection coils.

• Durability
  The combination of P22 alloy steel for the base tube and chromium steel fins ensures durability in harsh operating conditions, including thermal cycling and mechanical stress.

• Resistance to Thermal Fatigue
  Designed for continuous duty and frequent thermal cycles, making it ideal for furnace and economizer applications where rapid heating and cooling cycles occur.

Applications

The Alloy Steel Seamless Pipe, ASTM A335 P22 with 11-13Cr Fins is used in:

• Convection Coils in Furnaces
  These tubes are primarily used in the convection zone of fired heaters, where heat is transferred from flue gases to process fluids, such as water or steam.

• Heat Recovery Steam Generators (HRSGs)
  In combined cycle power plants, they recover waste heat from exhaust gases to generate steam.

• Boiler Economizers
  Preheating feedwater using flue gas heat recovery before it enters the boiler for further steam generation.

• Superheaters & Reheaters
  Used in power plants for steam superheating and reheating applications where high-pressure steam is essential for driving turbines.