ASTM A213 T22 HFW Serrated Finned Tube With Carbon Steel Fins For Furnace

ASTM A213 T22 HFW Serrated Finned Tube with Carbon Steel Fins is a specialized type of heat exchanger tube designed for high-efficiency thermal transfer in boilers, superheaters, and other high-temperature/pressure applications. Here’s a detailed breakdown of its components and characteristics:

1. Base Tube Specifications

(1) Chemical Composition (Weight %)

Notes:

Key Alloying Elements: Cr and Mo provide oxidation resistance and high-temperature strength.

Low S/P: Minimizes hot cracking during welding.

(2) Mechanical Properties

Additional Requirements:

Heat Treatment:

T22 tubes are typically supplied in the normalized and tempered condition (e.g., 900–950°C normalized, 680–730°C tempered).

High-Temperature Performance:

Creep Strength: ~34 MPa at 600°C (1,112°F) for 100,000 hours.

Oxidation Resistance: Stable up to 580°C (1,076°F) in steam environments.

(3) Key Applications

• Boiler Tubes: Superheaters, reheater tubes.
• Heat Exchangers: Refineries, power plants.
• Pressure Vessels: ASME SA-199 T22 for seamless pipes.

2. Fin Design

Fin Type: Serrated Fins

• Structure: Fins are cut into discontinuous segments (serrations) to disrupt boundary layers, enhancing heat transfer by 20-30% compared to smooth fins.
• Material: Carbon steel fins (typically ASTM A179 or A192 for compatibility with the base tube).

Key Benefits:

• Turbulence generation for improved heat exchange.
• Reduced fouling in dirty gas/fluid environments.

3. Comparison to Alternatives

4. Key Considerations for Buyers

Fin Density: Typically 5-11 fins per inch (FPI), depending on gas flow requirements.

Corrosion Protection: Optional aluminization or ceramic coating for harsh environments.

Customization: Fin height, thickness, and serration pattern can be tailored

The ASTM A213 T22 HFW Serrated Finned Tube with Carbon Steel Fins is a high-performance heat transfer component designed for demanding industrial applications. Here’s a detailed breakdown of its key applications and advantages:

1.Primary Applications

A. Power Generation

• Boilers & Superheaters:
  • Used in coal-fired, gas-fired, and biomass power plants to enhance heat recovery from flue gases.
  • Why T22? The 2.25% Cr-1% Mo alloy resists oxidation and creep at temperatures up to 580°C (1,076°F).
• Economizers:
  • Preheats feedwater by recovering waste heat from exhaust gases, improving plant efficiency.

B. Oil & Gas/Petrochemical

• Waste Heat Boilers:
  • Recovers energy from process gases (e.g., refinery catalytic crackers).
• Fired Heaters:
  • Serrated fins disrupt boundary layers, reducing fouling in hydrocarbon processing.

C. Industrial Heat Exchangers

• Air Preheaters:
  • Preheats combustion air using exhaust gases (common in cement/steel plants).
• Process Heaters:
  • Transfers heat in chemical reactors or distillation columns.

D. HVAC & Energy Recovery

• Heat Recovery Steam Generators (HRSGs):
• Captures heat from gas turbine exhaust to produce steam.

2. Why Choose This Combination?