ASME SA213 T22 Serrated Fin Tube For Waste Heat Recovery Boilers and Heating Furnaces

ASME SA213 T22 Serrated Fin Tube Advantages​

• Significant Improvement in Heat Transfer Efficiency​ Compared to smooth fins, the serrated structure disrupts boundary-layer airflow, minimizing thermal resistance and increasing the heat transfer coefficient by over 30%. It is particularly well-suited for flue gas waste heat recovery applications operating within the 300℃–700℃ range.​
• Strong Structural Stability​ A seamless base tube paired with the HFW process ensures tight bonding between fins and the base tube, eliminating the risk of incomplete welding. It can withstand high-pressure operating conditions, making it compatible with high-pressure systems such as power plant boilers;​ The composite materials exhibit excellent compatibility and a small difference in thermal expansion coefficients, preventing fin detachment caused by thermal cycling.​
• Economy and Durability​ Low Maintenance Costs: Corrosion resistance reduces the frequency of pickling treatments, while the serrated structure minimizes dust accumulation—extending the cleaning interval by over 50%;​ Broad Adaptability: Length and fin parameters can be customized to match equipment requirements across industries including power generation, petrochemicals, and food processing.​

ASME SA213 T22 Serrated Fin Tube Applications​

Leveraging its high-temperature stability, corrosion resistance, and enhanced heat transfer efficiency, the ASME SA213 T22 serrated fin tube is widely adopted in the following key industries and scenarios:​

Power Generation Industry​

• Boiler Systems: Used in the convection section and economizers of coal-fired, gas-fired, and biomass-fired power plant boilers. Its high-pressure resistance (up to 20MPa) and creep resistance at 600℃ ensure reliable heat exchange for feedwater heating and flue gas cooling;​
• Waste Heat Recovery Boilers (WHRB): Applied in combined cycle power plants (CCPP) to recover waste heat from gas turbine exhaust (300℃–550℃), improving overall power generation efficiency by 8%–12%.​

Petrochemical and Refining Industry​

• Heating Furnaces: Installed in the convection coils of crude oil distillation furnaces and ethylene cracking furnaces, where it resists corrosion from sulfur-containing flue gas and enhances heat transfer for fuel savings.
• Heat Exchangers: Used in amine gas treatment units (for natural gas desulfurization) and crude oil preheating systems, with 11Cr fins providing long-term resistance to amine and acidic crude media.​

Marine and Offshore Engineering​

• Marine Boilers and Heaters: Employed in shipboard steam boilers and diesel engine jacket water coolers. The galvanized surface treatment prevents seawater corrosion, while the serrated structure avoids dust and oil sludge accumulation in confined marine spaces.
• Offshore Platforms: Used in process heat exchangers for offshore oil and gas production, withstanding high humidity, salt spray, and occasional temperature fluctuations (0℃–400℃).​

Other Industrial Sectors​

• Waste-to-Energy Plants: Applied in flue gas heat recovery systems to preheat combustion air, reducing auxiliary fuel consumption and handling high-dust exhaust via customizable fin pitch.
• Food and Beverage Processing: Used in high-temperature sterilization equipment and steam heaters, with smooth fin-free ends ensuring compliance with food safety hygiene standards (e.g., 3-A Sanitary Standards).
• Seawater Desalination Plants: Installed in multi-effect distillation (MED) heat exchangers, where corrosion resistance to seawater and brine ensures stable operation for freshwater production.

ASME SA213 T22 Serrated Fin Tube Frequently Asked Questions (FAQs)​

• What advantages does it offer over standard smooth fin tubes?​

The serrated structure enhances heat transfer via airflow disturbance, boosting heat recovery efficiency by 25%–40% for the same heat exchange area. Additionally, the 11Cr fins provide better corrosion resistance than standard carbon steel fins, extending service life by 2–3 times.​

•  What is the recommended temperature and pressure range?​

Temperature: Maximum continuous operating temperature is 600℃, with short-term peak temperature tolerance up to 650℃;​ Pressure: Applicable system pressure depends on the base tube’s wall thickness. It meets the requirements of conventional operating conditions (≤20MPa), and thick-walled base tubes (up to 14mm) can be customized for high-pressure scenarios.​

• How to address dust accumulation on fins?​

The gaps between serrations disrupt dust layer formation, allowing easy cleaning via compressed air purging or high-pressure water washing. For high-dust environments, fins with a larger pitch (≥3mm is recommended) can be customized to reduce dust adhesion.