High-Frequency Welding ASTM A312 TP316L Stainless Steel Fin Pipe for Furnace Applications
ASTM A312 TP316L stainless steel finned pipes are widely used in furnaces and heat-intensive environments where superior corrosion resistance and thermal conductivity are required. The high-frequency welding process ensures a strong bond between the fins and the base tube, optimizing heat transfer efficiency and durability under harsh conditions.
1. Material Specifications
Base Tube Material:
- Standard: ASTM A312
- Grade: TP316L (Low-Carbon Stainless Steel)
- Type: Austenitic stainless steel, seamless or welded.
- Applications: Suitable for high-temperature and corrosive environments.
Fin Material:
- Material: Stainless Steel (can match TP316L or alternative grades for specific applications).
- Type: High-frequency welded fins.
2. Chemical Composition of Base Tube (ASTM A312 TP316L)
| Element | Content (%) |
| Carbon (C) | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Silicon (Si) | ≤ 0.75 |
| Chromium (Cr) | 16.00 – 18.00 |
| Nickel (Ni) | 10.00 – 14.00 |
| Molybdenum (Mo) | 2.00 – 3.00 |
3. Mechanical Properties of Base Tube (ASTM A312 TP316L)
| Property | Value |
| Tensile Strength | ≥ 485 MPa |
| Yield Strength | ≥ 170 MPa |
| Elongation | ≥ 35% |
| Hardness | ≤ 217 HB |
4. Key Features of High-Frequency Welded Fins
- Strong Bonding: The high-frequency welding process creates a robust bond between the fins and the base tube, ensuring durability under high thermal stresses.
- Enhanced Heat Transfer: Fins increase the surface area for heat exchange, improving efficiency in furnaces.
- Corrosion Resistance: TP316L stainless steel provides excellent resistance to oxidation, pitting, and crevice corrosion in high-temperature and acidic environments.
- Thermal Efficiency: Low carbon content in TP316L reduces carbide precipitation, maintaining superior thermal conductivity.
5. Applications
- Furnaces: Used in radiant and convection sections to enhance heat recovery and improve efficiency.
- Heat Exchangers: Widely applied in chemical plants, refineries, and power plants.
- Boilers: Ideal for high-temperature boiler applications requiring efficient heat transfer and durability.
- Petrochemical Industry: Suitable for harsh environments with corrosive media.
6. Advantages
- Durability: Withstands high temperatures and corrosive conditions for long operational life.
- Energy Efficiency: Optimized heat transfer reduces fuel consumption and operational costs.
- Low Maintenance: High corrosion resistance minimizes the need for frequent repairs or replacements.
- Versatility: Suitable for a wide range of industrial applications.
