ASTM A335 P22 is a seamless ferritic alloy steel designed for high-temperature service.

• Composition: Chromium (Cr) and Molybdenum (Mo) improve heat resistance, tensile strength, and corrosion resistance.
• Properties: High-temperature strength maintains mechanical integrity at elevated temperatures.
• Oxidation Resistance: Chromium enhances resistance to oxidation in furnace environments.
• Durability: Ideal for long-term use in harsh conditions.

• Material: Fins made of 11-13% Chromium (stainless steel grade).
• Corrosion and Oxidation Resistance: Suitable for environments with high humidity, corrosive gases, or elevated temperatures.
• Thermal Efficiency: Ensures efficient heat transfer in furnace applications.

Fins are welded onto the tube using high-frequency electric resistance welding, creating a strong metallurgical bond that remains intact under extreme thermal and mechanical stress.

• Strong Bonding: Provides excellent mechanical strength for vibration-prone environments.
• Thermal Efficiency: Ensures consistent heat transfer without gaps or weak points.
• Durability: Resistant to thermal cycling and mechanical wear.

In furnace systems, finned tubes enhance heat transfer, ensuring efficient heating of fluids or gases. Typical applications include reheat furnaces, petrochemical cracking furnaces, and waste heat recovery systems.

• Heat Resistance: The combination of P22 alloy steel and chromium-rich fins provides exceptional performance at high temperatures.
• Oxidation Protection: Resistant to scaling and oxidation, even in direct flame exposure or high-temperature flue gases.
• Energy Efficiency: Enhanced heat transfer reduces fuel consumption and improves furnace efficiency.

• High-Temperature Performance: Withstands temperatures up to 600°C or more, making it ideal for furnaces.
• Corrosion and Oxidation Resistance: 11-13Cr fins protect the tube from corrosive gases and oxidation, extending service life.
• Enhanced Heat Transfer: Improves heat exchange efficiency, reducing energy costs.
• Durability: Strong bond between fins and tubes ensures reliability in demanding environments.
• Versatility: Suitable for various furnace configurations and industrial applications.

• Petrochemical Industry: Cracking furnaces, reformers, and heat recovery systems.
• Power Generation: Heat recovery steam generators (HRSG) and boiler systems.
• Refineries: Processing units requiring high-efficiency heating.
• Waste Heat Recovery: Systems that capture and utilize heat from exhaust gases.
• Industrial Furnaces: Reheat and annealing furnaces in steel production and heavy industries.

• High Efficiency: Ensures optimal heat transfer for energy savings.
• Longevity: Resistant to high-temperature corrosion and oxidation, minimizing maintenance costs.
• Reliability: Robust construction suitable for harsh industrial conditions.
• Cost-Effective: Reduces downtime and energy costs over the long term.