Alloy Steel Seamless ASME SA335 P22 HFW Fin Tube With 11-13 CR Fin Strip

Alloy Steel Seamless Tube, ASME SA335 P22, HFW Fin Tube with 11-13 CR Fin Strip 

Product Introduction

The ASME SA335 P22 High Frequency Welded (HFW) Fin Tube is manufactured from alloy steel seamless tubing with helically welded 11–13% chromium steel fins. This design ensures excellent heat transfer, corrosion resistance, and mechanical durability in high-temperature environments, such as furnaces, heaters, and economizers.

Chemical Composition

Base Tube – ASME SA335 P22 (Alloy Steel)

Fin Material – 11–13Cr Steel (Typical Composition)

Mechanical Properties (SA335 P22)

Key Advantages

• Excellent High-Temperature Strength
  Suitable for continuous operation under high heat and pressure.

• Outstanding Oxidation & Sulfidation Resistance
  Chromium-rich fin material resists scaling and chemical attack in furnace atmospheres.

• High Welding Integrity
  HFW ensures tight fin attachment with low thermal contact resistance.

• Efficient Heat Transfer
  The extended surface area improves convective heat exchange efficiency.

• Long Service Life
  Withstands cyclic thermal stress and harsh flue gas exposure.

Typical Applications

Used in thermal and petrochemical industries, particularly in heat exchange equipment exposed to flue gases:

• Furnace Convection Coils

• Boiler Economizers

• Superheaters and Reheaters

• Heater Tubes in Refineries & Power Plants

• Waste Heat Recovery Units (WHRU)