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| Brand Name: | YUHONG |
| Model Number: | Serrated Fin Tube |
| MOQ: | Depend the size of finned tubes, 50-100PC |
| Price: | Negotiable |
| Payment Terms: | T/T,L/C |
| Supply Ability: | 1000 tons/month |
Product Overview
The combination of ASME SA192 base tubes and ASTM A210 Gr.C serrated fins forms a highly efficient, reliable, and cost-effective heat exchange element, widely used in industrial waste heat recovery applications.
This configuration features a matched material design using homogeneous carbon steel. The base tube offers high strength, excellent weldability, and good creep resistance, making it suitable for medium- to high-pressure boiler systems. The fins, made from A210 Gr.C low-carbon steel strip, are formed into a serrated shape and securely bonded to the base tube via high-frequency welding. This construction ensures superior heat transfer efficiency, high structural rigidity, and strong resistance to vibration and abrasion.
The serrated fin design significantly enhances turbulence on the flue gas side, disrupting the thermal boundary layer and improving the convective heat transfer coefficient by 30% to 60%. It also provides a degree of self-cleaning capability, effectively reducing ash fouling and blockage, thereby extending operational cycles.
This tube-and-fin combination is particularly suited for:
·Economizers in power plant boilers
·Air preheaters in industrial boilers
·Energy-saving retrofits for gas-fired boilers
·High-temperature flue gas waste heat recovery systems in metallurgy, cement, and biomass boiler applications
It delivers significant benefits in improving energy utilization, lowering exhaust gas temperatures, and reducing fuel consumption.
Chemical Composition and Material Properties
| Components | Material Standards | Main Characteristics |
| Base Tube | ASME SA192 | This fine-grain carbon steel seamless tube is specifically designed for high-pressure boiler heating surfaces. It offers high strength, excellent weldability, and good creep resistance. |
| Fin | ASTM A210 Gr. C | This low-carbon steel (C ≤ 0.35%) offers moderate strength and good ductility, making it suitable for stamping and high-frequency welding. |
Material Advantages
1. Homogeneous Material Compatibility
- Both the base tube and fins are made of closely matched carbon steels (SA192 and A210 Gr. C with similar compositions), ensuring identical thermal expansion coefficients.
- High-frequency resistance welding results in uniform fusion zones, avoiding stress concentration issues typical of dissimilar metal interfaces.
- The weld achieves high bonding strength (≥90% of the base material strength), preventing fin separation during long-term operation.
2. High Load-Bearing Capacity
- SA192 base tube provides a minimum tensile strength ≥485 MPa and yield strength ≥275 MPa.
- Suitable for medium- to high-pressure conditions (e.g., boiler feedwater pressure up to 10–18 MPa).
- Offers excellent structural stability, ideal for vertically installed large-scale heat exchange modules.
3. Excellent Cost-Effectiveness
- Low raw material cost with ample domestic supply.
- Mature, scalable manufacturing process suitable for high-volume automated production.
- Can reduce investment by 30%–50% compared to stainless steel finned tubes.
4. Superior Workability and Weldability
- A210 Gr. C steel strip is easily stamped into serrated fin shapes with clean edges and minimal deformation.
- Enables consistent high-frequency welding, producing dense welds with low thermal resistance.
- Facilitates on-site cutting, fitting, and welding, simplifying installation and maintenance.
Performance Advantages
| Performance | Advantages |
| High-Efficiency Heat Transfer | By disrupting the boundary layer and enhancing turbulence, the serrated structure boosts the heat transfer coefficient by 30–60% over plain fins, dramatically increasing volumetric heat flux. |
| Enhanced Turbulence & Self-Cleaning Capability | The serrated edges facilitate ash dislodgment through vortex pulsations, thereby reducing fouling blockages and extending maintenance cycles. |
| High Structural Rigidity | With dramatically increased rigidity, the serrated fin withstands vibration and deformation, performing reliably in high-velocity flue gas streams. |
| Compact Design | Dramatically expands heat transfer surface (5–8x bare tube), enabling a compact design that saves significant space. |
| Wide Operating Temperature Range | Ensures stable, long-term performance across a 200–550°C range, ideal for retrofitting boiler low/medium-temperature sections. |
Application Features
1.Power Plant Boiler Economizer
Function: Utilizes exhaust flue gas to heat boiler feedwater, lowering exhaust temperature and increasing thermal efficiency.
Key Advantages:
High Pressure Resistance: SA192 base tubes meet high-pressure feedwater requirements.
High Heat Transfer Efficiency: A210 Gr.C fins provide substantial heat exchange area, reducing exhaust temperature from 350°C to below 280°C.
Self-Cleaning Design: Serrated fin structure prevents fly ash accumulation, ensuring continuous operation.
2.Industrial Boiler Air Preheater (APH)
Function: Recovers waste heat from flue gas to preheat combustion air, thereby saving fuel.
Key Advantages:
Fuel Savings: High-efficiency heat transfer reduces natural gas/coal consumption by 5–10%.
Abrasion Resistance: Homogeneous carbon steel structure withstands dusty flue gas conditions.
Easy Maintenance: Compatible with acoustic soot blowing systems to maintain operational cleanliness.
3.Gas/Biomass Boiler Heat Recovery Economizer
Function: Deeply recovers sensible heat from flue gas, increasing overall boiler thermal efficiency to over 90% (for non-condensing units).
Key Advantages:
Cost-Effective: Lower cost than stainless steel alternatives, ideal for small to medium-scale projects.
Enhanced Low-Temperature Performance: Serrated fins significantly improve heat transfer in low-temperature sections.
Long Service Life: When operated above the acid dew point (>150°C), lifespan can exceed 10 years.
4. Waste Heat Boilers for Metallurgical, Glass, and Cement Industries
Characteristics: High-temperature, high-dust, and intermittent operating conditions.
Key Advantages:
Strong Thermal Shock Resistance: Withstands rapid temperature fluctuations.
High Abrasion Resistance: Serrated fin structure resists damage from particle erosion.
Modular & Adaptable: Easy modular assembly adapts to complex on-site layouts.
Address
20 Floor, No.1 New World Building, NO.1018 Min'an Road, Yinzhou District, Ningbo, China, ZIP:315040
Tel
+86-574-88013900
