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Spiral Fin Tube
Material
The spiral fin tube is typically made from carbon steel or stainless steel. The choice of material depends on the specific application requirements such as temperature, corrosion resistance, and mechanical strength.
Specification
The specifications of a spiral fin tube can vary based on its intended usage. The dimensions, wall thickness, diameter, and pitch of the fins are determined based on the heat transfer requirements of the application. Specific tolerances and quality standards should be followed to ensure the performance and reliability of the spiral fin tube.
Key Features
- Enhanced heat transfer efficiency: The spiral fins increase the surface area of the tube, facilitating better heat transfer between the fluid and the surrounding environment.
- Improved thermal conductivity: The use of high-quality materials ensures efficient heat conduction across the tube's surface.
- Enhanced mechanical strength: The integrated spiral fins provide additional structural support, making the tube more robust and resistant to external forces.
- Versatile application possibilities: Spiral fin tubes are utilized in various industries, including petrochemical, power generation, HVAC, and heat exchangers.
Customizable design: The dimensions, material, and shape of the spiral fins can be tailored to meet specific project requirements.
Chemical Composition
| Element | Carbon Steel(%) | Stainless Steel(%) |
| Carbon | 0.05-0.30 | 0.08 maximum |
| Manganese | 0.30-0.90 | 2.00 maximum |
| Silicon | 0.10-0.35 | 1.00 maximum |
| Chromium | - | 16.00-18.00 |
| Nickel | - | 10.00-14.00 |
| Other | Trace elements | Trace elements |
Mechanical Properties
| Property | Carbon Steel | Stainless Steel |
| Tensile Strength | 410-540 MPa | 515-690 MPa |
| Yield Strength | 250 MPa minimum | 205 MPa minimum |
| Elongation | 21% minimum | 40% minimum |
| Hardness (HB) | 80-150 | 80-180 |
| Modulus of Elasticity | 200-210 GPa | 190-210 GPa |
Physical Properties
| Property | Carbon Steel | Stainless Steel |
| Density | 7.85 g/cm³ | 7.9 g/cm³ |
| Thermal Conductivity | 45-50 W/(m·K) | 14-17 W/(m·K) |
| Coefficient of Thermal Expansion | 10-12 x 10^-6/°C | 10-16 x 10^-6/°C |
| Specific Heat Capacity | 0.46 J/g·K | 0.45 J/g·K |
Process Performance
| Performance | Carbon Steel | Stainless Steel |
| Weldability | Excellent | Excellent |
| Machinability | Fair | Fair to Good |
| Corrosion Resistance | Lower resistance | Excellent corrosion |
| Oxidation Resistance | Lower resistance | Excellent oxidation |
| Heat Resistance | Moderate | High |
Steel Grade
Common steel grades used for spiral fin tubes include:
- Carbon Steel: ASTM A179, ASTM A192, ASTM A210, ASTM A214, ASTM A106
Stainless Steel: ASTM A269, ASTM A312, ASTM A213, ASTM A358
Application
Spiral fin tubes find applications in various industries:
- Petrochemical: Heat exchangers, condensers, boilers
- Power Generation: Economizers, air preheaters, steam generators
- HVAC: Radiators, air coolers, evaporators
Heat Exchangers: Shell and tube heat exchangers, plate heat exchangers
Possible Alternative Grades
Alternative steel grades that can be used as substitutes for spiral fin tubes include:
- Carbon Steel: ASTM A334, ASTM A210, DIN 17175
- Stainless Steel: ASTM A312, ASTM A249, ASTM A213, DIN 17456
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