ASTM A213 T9 Alloy Steel HFW Fin Tube For Economizer High Pressure Situation

Product Specification

ASTM A213 T9 Alloy Steel HFW Fin Tube For Economizer High Pressure Situation

Product Overview:

The ASTM A213 T9 Alloy Steel HFW Fin Tube is specifically designed for use in economizers and other high-pressure systems, where heat transfer efficiency and corrosion resistance are critical. Made from T9 alloy steel (a chrome-molybdenum alloy steel), these tubes are capable of withstanding high temperatures and pressures typically found in boilers, economizers, and heat recovery systems in power plants, petrochemical industries, and industrial heating applications. The High-Frequency Welding (HFW) process is used to bond the fins to the base tube, ensuring high strength and durability in demanding environments.

Key Features

1. Base Tube Material: ASTM A213 T9 Alloy Steel

• ASTM A213 T9 is a chrome-molybdenum alloy steel (Cr-Mo) that offers excellent strength, resistance to creep, and high-temperature oxidation resistance. It is specifically designed for use in high-pressure applications such as economizers, superheaters, and boilers in power plants and chemical processing industries.

• T9 alloy steel is highly resistant to thermal fatigue and can withstand extreme temperature variations, making it ideal for heat recovery and energy-efficient systems.

2. Fin Type: HFW (High-Frequency Welding) Fin Tube

• High-Frequency Welding (HFW) is a process where metal fins (usually aluminum or stainless steel) are welded onto the T9 alloy steel tube to create a solid fin bond, ensuring that the finning will not detach under thermal cycling.

• This welding method provides superior thermal performance and mechanical integrity in high-pressure and high-temperature environments.

• The fin design increases the surface area of the tube, significantly improving the heat transfer efficiency.

3. Fin Material: Aluminum or Stainless Steel

• The fin material is typically aluminum (for its excellent thermal conductivity and lightweight properties) or stainless steel (for corrosion resistance and strength in demanding conditions).

• The choice of material for the fins depends on the operating environment of the economizer, ensuring that the fins can withstand oxidation, corrosion, and thermal stresses.

4. Application: Economizer, Heat Recovery, High-Pressure Situations

• ASTM A213 T9 Alloy Steel HFW Fin Tubes are used primarily in economizers, where they help recover heat from flue gases in power plants and industrial systems.

• These tubes are also used in heat exchangers, superheaters, and boilers in high-pressure environments, where efficiency and reliability are critical.

Chemical Composition

Base Tube: ASTM A213 T9 Alloy Steel

Mechanical Properties

Base Tube: ASTM A213 T9 Alloy Steel

Advantages of HFW Fin Tubes in Economizers for High-Pressure Applications

1. High-Temperature and High-Pressure Resistance:

   • The T9 alloy steel provides excellent resistance to creep and oxidation at high temperatures, making it ideal for use in economizers, superheaters, and boilers in high-pressure systems.

2. Efficient Heat Transfer:

   • The HFW (high-frequency welded) solid fin tube design increases the surface area for heat exchange, improving the overall thermal efficiency of the system.

3. Durability and Strength:

   • The mechanically bonded fins and welded base tube ensure structural integrity in the most demanding operating conditions, ensuring a long service life for furnaces and heat exchangers.

4. Corrosion Resistance:

   • Aluminum or stainless steel fins offer superior corrosion resistance in high-temperature environments, particularly in systems exposed to steam and flue gases, making it ideal for use in economizers.

5. Cost-Effective and Reliable:

   • The HFW welding process allows for strong bonds between the fins and base tube, providing an economical solution for high-performance heat exchangers while maintaining high reliability.

Applications

• Economizers: The tubes are widely used in power plant economizers to recover heat from exhaust gases and increase the overall energy efficiency of the system.

• Heat Exchanger Systems: Ideal for superheaters, boilers, and heat exchangers in chemical plants, oil refineries, and power generation.

• Furnaces: Used in furnace tubes and high-temperature systems where efficient heat exchange is required under high pressure and temperature.