The A312 TP347H High Frequency Spiral Welding Fin Tube is a specialized component designed for high-efficiency heat transfer in demanding environments. Here's a breakdown of its key applications and advantages:
Key Applications
Power Generation
- Boilers/Superheaters: Withstands high-pressure steam and temperatures (up to 750°C) in coal-fired, gas-fired, or biomass power plants.
- Economizers: Recovers waste heat from flue gases to preheat feedwater, improving plant efficiency.
- Heat Recovery Steam Generators (HRSG): Used in combined-cycle power plants for gas-to-steam heat exchange.
Petrochemical & Refining
- Furnace Convection Sections: Efficiently transfers heat in ethylene crackers or reformers.
- Process Gas Heaters/Coolers: Handles corrosive gases (e.g., sulfur compounds) at elevated temperatures.
Oil & Gas
- Heat Exchangers in Refineries: For crude oil preheating, distillation, or catalytic processes.
- Exhaust Gas Boilers (EGBs): Recovers heat from gas turbine exhaust in offshore platforms.
Waste Heat Recovery Systems
- Captures residual heat from industrial exhausts (e.g., cement kilns, steel mills) to generate steam or power.
Incinerators & Waste-to-Energy Plants
- Resists oxidation and corrosion from aggressive flue gases containing chlorides or acids.
HVAC & Industrial Heating
- High-efficiency air heaters, economizers, or process dryers requiring compact, corrosion-resistant designs.
Why TP347H?
- High-Temperature Strength: Stabilized with niobium (Nb) to resist creep and oxidation.
- Corrosion Resistance: Excellent performance in acidic, chloride-rich, or sulfidizing environments.
- Sensitization Resistance: Minimizes intergranular corrosion risk during welding or prolonged high-temp exposure.
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| Grade | UNS Designation | C | Mn | P | S | Si | Cr | Ni |
| TP347H | S34709 | 0.04–0.10 | 2 | 0.045 | 0.03 | 1 | 17.0–19.0 | 9.0–13.0 |
- Spiral Fin Design Advantages
- Enhanced Surface Area: Improves heat transfer efficiency, especially for gases with low thermal conductivity.
- Turbulence Induction: Spiral geometry disrupts laminar flow, boosting convective heat transfer.
- Compact Design: Maximizes heat exchange in space-constrained installations.
Industries Served
- Thermal power plants
- Petrochemical refineries
- Oil & gas processing
- Chemical manufacturing
- Waste management/incineration
- Industrial HVAC
This fin tube is ideal for applications demanding durability under thermal stress, corrosion resistance, and high heat-transfer efficiency. Its design and material make it a go-to solution for harsh, high-temperature environments.
