HFW Fin Tube, ASTM A312 TP347H Stainless Steel, Spiral Fin tube For Economizer
The High-Frequency Welding Spiral Fin Tube (ASTM A312 TP347H Stainless Steel) is a crucial component for improving the efficiency of economizer systems. Its combination of high heat transfer efficiency, durability, and resistance to high temperatures and corrosion makes it ideal for use in power plants, chemical industries, and other heat recovery applications. The spiral fin design further enhances its performance by increasing the surface area available for heat exchange, ensuring optimal thermal efficiency
1. Material Specification:
- Base Tube Material: ASTM A312 TP347H Stainless Steel
- Grade: TP347H is a high-temperature resistant, austenitic stainless steel with excellent oxidation and corrosion resistance properties.
- TP347H is highly resistant to sensitization and intergranular corrosion at elevated temperatures, making it ideal for heat exchangers and economizers in power plants, chemical, and petrochemical industries.
| Chemical Composition (ASTM A312 TP347H Stainless Steel) |
|---|
| Content (%) | Carbon | Manganese | Phosphorus | Sulfur | Silicon | Chromium | Nickel | Molybdenum | Niobium |
| Element | ≤ 0.04% | 1.00 – 2.00% | ≤ 0.045% | ≤ 0.030% | ≤ 0.75% | 17.00 – 19.00% | 9.00 – 13.00% | ≤ 0.30% | 1.00 – 1.50% |
| Mechanical Properties (ASTM A312 TP347H Stainless Steel) | | Property | Tensile Strength | Yield Strength | Elongation | Impact Energy | Hardness | Proof Stress | | Value | ≥ 515 MPa | ≥ 205 MPa | ≥ 40% | ≥ 70 J (at -196°C) | ≤ 170 HB | ≥ 205 MPa |
|
|---|
2. Spiral Fin Design:
- Fin Type: Spiral Finned Tube
- Design: The spiral fin tube features a continuous spiral wound around the base tube, significantly increasing the surface area available for heat exchange.
- Benefits:
- Increased Heat Transfer Efficiency: The spiral fin design improves the turbulence of the fluid surrounding the tube, enhancing heat transfer rates.
- Compact and Efficient: Offers a high surface area in a compact space, which is ideal for applications where space is limited.
- Self-Cleaning Effect: The spiral structure helps to reduce the likelihood of fouling, improving maintenance and performance over time.
3. Application:
- Economizers: Primarily used in economizer systems of boilers and heat recovery systems to preheat feedwater or gases, reducing energy consumption by recovering waste heat.
- In power plants: Optimizes thermal efficiency by recovering heat from exhaust gases before they are expelled.
- In industrial processes: Utilized in heat recovery systems in industries such as chemicals, oil refining, and petrochemical plants.
- Heat Recovery Systems: Ideal for recovering heat from industrial exhausts, enabling more efficient operation of boilers and turbines.
- Other Applications: Also used in steam generation units, heat exchangers, and other systems that require heat transfer between gases and liquids or gases and solids.
4. Advantages of High-Frequency Welding Spiral Fin Tubes for Economizers:
- Superior Heat Transfer: The spiral fin design maximizes surface area, leading to higher efficiency in heat exchange processes.
- Durability: The ASTM A312 TP347H stainless steel provides outstanding resistance to oxidation and corrosion at high temperatures, extending the life of the tube even in harsh operating conditions.
- High-Temperature Resistance: Suitable for applications in environments with temperatures up to 900°C (1652°F), common in industrial and power generation processes.
- Energy Savings: By improving heat recovery, these fin tubes help reduce the overall energy consumption of the system, lowering operational costs.
- Corrosion Resistance: Stainless steel provides resistance to corrosion in aggressive environments, such as those encountered in industrial waste heat systems.
