Welded Serrated Fin Tubes TP304H for Power Plant and Petrochemical

High Frequency Welded Serrated Finned Tubes – ASTM A312 TP304H Base Tube

High Frequency Welded Serrated Finned Tubes with ASTM A312 TP304H base tubes are premium heat transfer components designed for high-temperature, high-pressure, and corrosive environments. Manufactured through a continuous high-frequency resistance welding process, these tubes combine the excellent corrosion resistance of TP304H stainless steel with serrated fins that dramatically increase external surface area, delivering superior heat exchange efficiency in boilers, heat recovery systems, and process heaters.

Product Structure: Base Tube, Fins, and High-Frequency Embedding Process

The finned tube consists of three integrated elements:

• Base Tube: Seamless or welded ASTM A312 TP304H austenitic stainless steel tube.
• Fins: Serrated carbon steel or stainless steel strips formed into a saw-tooth profile.
• High-Frequency Welding (Embedding) Process: The serrated fin strip is continuously welded to the base tube using high-frequency current (typically 100–450 kHz), creating a metallurgical bond without filler metal. This results in high weld strength, excellent thermal conductivity, and resistance to thermal shock.

Chemical Composition

Base Tube – ASTM A312 TP304H

Dimensional Tolerance Range

Performance Advantages

• Heat transfer efficiency increased by 8–12 times compared to bare tubes.
• Operating temperature up to 700 °C thanks to TP304H high-temperature strength.
• Excellent resistance to oxidation, sulfidation, and chloride corrosion.
• Strong metallurgical bond prevents fin detachment even under thermal cycling.
• Reduced fouling due to serrated profile that promotes turbulent flow.
• Compact design allows smaller heat exchangers with lower overall weight and cost.

Detailed Application Fields

These serrated finned tubes are widely used in:

• Power plant boilers (superheaters, reheaters, economizers)
• Waste heat recovery boilers (WHRB) and HRSG systems
• Petrochemical and refinery process heaters
• Biomass and coal-fired boilers
• Chemical processing and fertilizer plants
• Offshore platforms and FPSO heat exchangers
• Air-cooled heat exchangers (ACHE) in high-temperature services

Our Company Advantages and Experience

With over 15 years of specialized experience in manufacturing high-frequency welded serrated finned tubes, we maintain strict quality control throughout the entire production process. All tubes are produced in accordance with ASME, EN, and customer specifications. We provide complete material traceability, third-party inspection (TÜV, BV, SGS), and customized solutions including different fin materials, coatings, and packaging. Our tubes have been successfully supplied to major EPC contractors and end-users in more than 30 countries, consistently delivering reliable performance in demanding high-temperature applications.

Contact us today for detailed technical data sheets, drawings, and competitive quotations for your next project.