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HRSG Replacement Components Harps ASME SA213 T22 Serrated Fin Tube
Overview
Our Serrated Fin Tubes are engineered for high-temperature and high-pressure heat transfer applications, specifically optimized for use in Heat Recovery Steam Generators (HRSGs), waste heat boilers, fired heaters, and petrochemical process equipment. The finned construction maximizes surface area exposure for enhanced heat transfer efficiency, while the serrated fin configuration significantly improves turbulence and reduces fouling.
These tubes are manufactured with a base tube material of ASME SA213 T22—a high-strength Cr-Mo alloy steel—combined with high-quality carbon steel serrated fins, delivering superior mechanical stability and heat transfer performance under demanding operating conditions.
Technical Specifications
1. Base Tube Material: ASME SA213 T22
Material Type: Seamless ferritic alloy steel (2.25% Cr, 1% Mo)
Standards: ASTM / ASME SA213
Key Properties:
Excellent high-temperature strength
Superior resistance to oxidation and creep
High structural stability under pressure
Ideal for HRSG and boiler service temperatures up to ~600°C
2. Fin Material: Carbon Steel (CS)
Type: Low-carbon or medium-carbon steel depending on application
Advantages:
High thermal conductivity
Good weldability
Cost-effective material with strong mechanical properties
3. Fin Type: Serrated Fins
Serrated fins (also called segmented fins) are designed to break the boundary layer, creating enhanced turbulence and improving overall heat transfer efficiency.
Fin Characteristics
Fin Type: Serrated / Segmented
Fin Height: Typically 10–16 mm (customizable)
Fin Thickness: Typically 0.8–1.5 mm
Fin Density: Commonly 8–10 FPI (fins per inch), customizable
Fin Attachment: High-frequency resistance welding (HFRW)
Fin Orientation: Longitudinal serrations for optimized turbulence generation
Fin Performance Advantages
Increased heat transfer coefficient
Improved gas turbulence
Reduced fouling and ash deposition
Enhanced efficiency in HRSG convection sections
Better performance in dirty gas streams compared to solid fins
4. Tube Dimensions (Customizable)
Outer Diameter: 25.4 mm (1"), 38.1 mm (1.5"), 50.8 mm (2”), or custom sizes
Wall Thickness: From 2.0 mm to 6.0 mm depending on pressure and design code
Tube Length: Up to 18–20 meters (based on production capability and transport limits)
Straight or U-bend configurations available
5. Welding and Bonding Method
High-Frequency Resistance Welding (HFRW) ensures:
Full metallurgical bond between fin and tube
Excellent thermal conductivity
High mechanical strength
Long service life under thermal cycling
Applications
Serrated fin tubes with T22 base tubes are widely used in:
HRSG (Heat Recovery Steam Generators)
Combined Cycle Power Plants (CCPP)
Waste Heat Recovery Units (WHRU)
Petrochemical and refinery heaters
Boiler economizers and superheaters
High-temperature gas-to-air or gas-to-water heat exchangers
Key Advantages
High heat transfer efficiency
Reduced gas-side pressure drop
Better anti-fouling performance
Excellent mechanical durability at high temperature
Engineered for long-term service in harsh industrial environments
Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n... Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n...