ASME SA213 T22 Serrated Finned Tubes for High-Temperature Heat Exchangers and Boilers

ASME SA213 T22 Serrated Finned Tubes are premium heat transfer components engineered for high-temperature and high-pressure service environments. Manufactured from ASTM SA213 Grade T22 seamless ferritic alloy steel tubing and fitted with continuously welded serrated fins, these tubes are widely used in boilers, economizers, air heaters, waste heat recovery units, petrochemical plants, and power generation facilities.

The serrated fin design enhances thermal performance by disrupting the boundary layer of flowing gases, creating increased turbulence and improving convective heat transfer efficiency. Combined with the excellent creep resistance and oxidation resistance of ASME SA213 T22 alloy steel, these finned tubes provide reliable long-term operation in demanding industrial applications.

Serrated finned tubes are manufactured by welding specially notched (serrated) fins onto the external surface of a tube in a continuous helical pattern. The segmented fin profile increases airflow turbulence while reducing thermal resistance across the fin surface.

Compared with plain solid fin tubes, serrated finned tubes offer:

• Higher heat transfer coefficients
• Improved gas-side thermal efficiency
• Better performance under fouling conditions
• Reduced equipment size requirements
• Lower overall operating costs
• Enhanced heat recovery efficiency

For high-temperature heat recovery systems, ASTM SA213 T22 is one of the most widely specified materials due to its excellent strength retention and corrosion resistance.

The chromium-molybdenum alloy composition provides outstanding creep resistance and mechanical stability at elevated operating temperatures.

Serrated fins create controlled turbulence, increasing heat transfer rates compared with conventional solid fin designs.

High-frequency resistance welding ensures a continuous metallurgical bond between fin and tube, minimizing thermal contact resistance.

The chromium content improves resistance to oxidation and scaling in high-temperature flue gas environments.

Designed for continuous operation in severe industrial processes where reliability and thermal efficiency are critical.

Available in customized dimensions, fin configurations, and material combinations to suit specific process requirements.

ASME SA213 T22 Serrated Finned Tubes are commonly utilized in:

• Boiler Economizers
• Air Preheaters
• Heat Recovery Steam Generators (HRSG)
• Waste Heat Recovery Systems
• Refinery Process Heaters
• Petrochemical Furnaces
• Power Plant Heat Exchangers
• Thermal Oil Heaters
• Industrial Exhaust Gas Recovery Units
• Process Gas Cooling Equipment

Custom dimensions can be manufactured according to project specifications and international standards.

The chromium and molybdenum alloying elements contribute significantly to high-temperature strength, oxidation resistance, and long-term creep performance.

Mechanical properties may vary depending on heat treatment conditions and production requirements.

Our ASME SA213 T22 Serrated Finned Tubes are produced using a controlled manufacturing process:

1. Incoming raw material inspection and certification verification.
2. Precision preparation of ASTM SA213 T22 seamless tubes.
3. Production of serrated fin strips according to design specifications.
4. Continuous helical fin winding.
5. High-frequency resistance welding of fins to tube surface.
6. Weld seam monitoring and quality verification.
7. Dimensional inspection and performance testing.
8. Surface cleaning, preservation, marking, and packaging.

This process ensures a strong fin-to-tube bond and optimal thermal conductivity.

Every batch undergoes comprehensive testing and inspection procedures to ensure compliance with customer specifications and international standards.

• Raw material certificate review
• Heat number traceability
• Positive Material Identification (PMI) upon request

• Outside diameter measurement
• Wall thickness verification
• Fin height measurement
• Fin pitch inspection
• Tube straightness verification
• Length tolerance inspection

• Tensile Test
• Hardness Test
• Flattening Test
• Expansion Test (where applicable)

• Eddy Current Testing (ECT)
• Ultrasonic Testing (UT)
• Dye Penetrant Testing (PT)
• Magnetic Particle Testing (MT) upon request

• Fin-to-tube bond examination
• Continuous weld monitoring
• Fin attachment integrity testing

• Hydrostatic Testing according to ASTM requirements when specified.

• Increased external heat transfer area
• Improved thermal efficiency in gas-side applications
• Excellent resistance to creep deformation
• Reduced fouling impact compared to solid fin tubes
• Superior performance in high-temperature environments
• Lower fuel consumption through enhanced heat recovery
• Reduced equipment footprint
• Extended operational service life

Upon shipment, the following documentation can be provided:

• EN 10204 3.1 Material Test Certificate
• Chemical Analysis Report
• Mechanical Test Report
• Dimensional Inspection Report
• Hydrostatic Test Report
• PMI Report (Optional)
• NDT Reports
• Packing List
• Certificate of Conformity

Our serrated finned tubes are engineered to maximize thermal efficiency while maintaining exceptional durability under severe operating conditions. Through advanced welding technology, strict quality control, and complete material traceability, we supply finned tube solutions that meet the demanding requirements of power generation, petrochemical processing, refinery operations, and industrial heat recovery systems worldwide.

Whether your project requires standard dimensions or fully customized finned tube designs, our ASME SA213 T22 Serrated Finned Tubes deliver reliable heat transfer performance, reduced maintenance costs, and long-term operational value.