ASTM A213 T5 G Finned Tube / Embedded Finned Tube With Al1060 Fins For Power Plants

A G finned tube (also called "G-fin" or grooved finned tube) is a type of enhanced heat exchanger tube where aluminum fins are mechanically bonded to a grooved base tube for improved heat transfer and durability.

ASTM A213 T5 G Finned Tube with Al1060 Fins is a type of heat exchanger tube designed for high-temperature applications. Here's a breakdown of its components:

1. Key Features of G Finned Tubes

Grooved Base Tube

The base tube (usually carbon steel, stainless steel, or alloy steel like ASTM A213 T5) has precision-cut helical grooves on its outer surface.

The grooves provide a strong mechanical anchor for the fins.

Fin Attachment Method

Aluminum fins (e.g., Al1060) are cold-formed into the grooves under high pressure, creating a tight, gas-tight bond.

No soldering or welding is needed, reducing thermal resistance.

2. Base Tube – ASTM A213 T5

Chemical Composition (ASTM A213 T5)

Notes:

Low carbon content improves weldability.

Cr & Mo provide high-temperature strength and oxidation resistance.

Mechanical Properties (ASTM A213 T5)

Notes:

Suitable for service temperatures up to 650°C (1,200°F).

Good creep resistance due to 5% Cr & 0.5% Mo content.

3. Comparison with Similar Grades

The ASTM A213 T5 G Finned Tube with Al1060 Fins is primarily used in high-temperature heat exchange applications where efficient thermal transfer, corrosion resistance, and durability are critical. Below are its main applications:

1. Power Plants & Boilers

Superheaters & Reheaters:

The Cr-Mo steel (T5) base tube withstands high-pressure steam (up to 650°C), while the Al1060 fins enhance heat transfer from flue gases.

Economizers:

Recovers waste heat from exhaust gases to preheat boiler feedwater.

2. Petrochemical & Refinery Systems

Process Heaters & Furnaces:

Resists oxidation and sulfur corrosion in refinery environments.

Waste Heat Recovery Units (WHRU):

Captures heat from exhaust streams (e.g., catalytic crackers) to improve energy efficiency.

3. Air-Cooled Heat Exchangers (ACHEs)

Condensers & Coolers:

Aluminum fins (Al1060) maximize air-side heat transfer in fin-fan coolers for hydrocarbon processing.

4. HVAC & Industrial Heating

Thermal Oil Heaters:

Used in chemical plants where precise temperature control is needed.

Drying Systems:

Efficient heat transfer for industrial drying processes.