Serrated finned tubes are widely used in Heat Recovery Steam Generator (HRSG) modules to enhance thermal efficiency in gas turbine combined-cycle power plants. Manufactured using premium-quality ASME SA192 seamless carbon steel tubes, these finned tubes provide an optimized heat transfer surface while maintaining excellent mechanical strength under elevated operating temperatures.

The serrated fin design consists of continuously welded segmented fins around the base tube. The interruptions created by the serrations generate controlled turbulence in the flue gas stream, disrupting boundary layers and significantly improving heat transfer coefficients compared with plain or solid fin configurations.

Designed for economizers, evaporators, superheaters, and reheaters within HRSG systems, ASME SA192 serrated finned tubes offer an economical solution for maximizing energy recovery while minimizing equipment footprint.

• Manufactured from seamless ASME SA192 carbon steel tubes.
• Serrated fin geometry enhances gas-side heat transfer efficiency.
• High-frequency resistance welding ensures excellent fin-to-tube bonding.
• Reduced fouling tendency due to improved flow turbulence.
• Lower pressure drop compared with equivalent heat transfer capacities.
• Suitable for high-volume HRSG harp module fabrication.
• Excellent weld integrity and dimensional consistency.
• Customizable dimensions to meet project requirements.

Serrated finned tubes are extensively utilized in:

• Heat Recovery Steam Generator (HRSG) harp modules
• Combined-cycle power plants
• Gas turbine exhaust heat recovery systems
• Economizer sections
• Evaporator coils
• Superheater assemblies
• Reheater modules
• Industrial waste heat recovery units
• Cogeneration facilities
• Utility boiler systems

The fin strip is helically wound around the base tube and continuously joined using high-frequency resistance welding technology. During welding, the fin root and tube surface are fused under controlled pressure, producing a metallurgical bond with excellent thermal conductivity and mechanical strength.

Following welding, the fin profile is serrated at specified intervals to improve turbulence and increase effective heat transfer.

Production stages typically include:

1. Raw material verification.
2. Tube preparation and cleaning.
3. Fin strip forming.
4. High-frequency fin welding.
5. Serration processing.
6. Dimensional inspection.
7. Non-destructive examination.
8. Surface protection and packaging.

The following dimensions represent frequently supplied configurations for HRSG applications.

Custom dimensions are available based on HRSG design requirements.

The chemical composition of ASME SA192 seamless carbon steel tubes complies with ASME requirements.

The excellent ductility of SA192 facilitates fabrication operations such as bending and module assembly while maintaining reliable service performance.

To ensure dependable operation in demanding HRSG environments, serrated finned tubes undergo rigorous inspection and quality control procedures.

• Material certificate verification.
• Positive identification of tube heat numbers.
• Dimensional inspection of tubes and fin strips.

• Tube outside diameter.
• Wall thickness.
• Tube length.
• Fin height.
• Fin thickness.
• Fin pitch.
• Fin outside diameter.
• Serration geometry.

• Visual inspection (100%).
• Weld continuity inspection.
• Eddy current testing upon request.
• Ultrasonic examination upon request.
• Magnetic particle testing for selected applications.

• Flattening test.
• Flaring test.
• Hydrostatic test.
• Bond integrity verification.
• Fin adhesion assessment.

• Surface condition examination.
• Quantity verification.
• Marking inspection.
• Packaging inspection.
• Documentation review.

Serrated fins interrupt gas flow patterns, increasing turbulence and improving convective heat transfer efficiency.

The segmented fin structure minimizes ash accumulation and promotes self-cleaning effects in exhaust gas streams.

Higher heat transfer performance enables more compact HRSG module designs.

Improved thermal efficiency contributes to reduced fuel consumption and enhanced plant economics.

High-frequency welded fin roots provide excellent structural integrity during long-term operation.

Available documentation includes:

• Mill Test Certificate (MTC)
• EN 10204 Type 3.1 Certificate
• Dimensional Inspection Report
• NDE Reports
• Hydrostatic Test Report
• Packing List
• Commercial Invoice
• Certificate of Origin (upon request)

Packaging options include seaworthy export wooden cases, steel frame bundles, and customized protection suitable for international transportation.

With extensive manufacturing expertise in finned tube technology, we supply high-performance serrated finned tubes engineered for demanding HRSG applications worldwide. Strict quality control, flexible production capability, and compliance with international standards ensure that every tube contributes to reliable heat recovery and improved plant efficiency.

Whether for new combined-cycle installations or HRSG retrofits, our ASME SA192 serrated finned tubes deliver the thermal performance and durability required by modern power generation projects.