High Frequency Electric Resistance Serrated Fin Tube is a high-efficiency heat exchange component formed by welding serrated fins onto a base tube using the high-frequency electric resistance welding process. The fins are arranged in a serrated pattern, primarily designed to enhance heat transfer efficiency.
High Frequency Electric Resistance Welding Process:
High-frequency current (200-400kHz) generates induction heating at the contact area between the fin and the base tube, instantly reaching temperatures of 800-1000℃ to melt and fuse the metals, forming a high-strength metallurgical bond without filler material. The welding strength reaches 150-200MPa, with contact thermal resistance as low as 0.0005-0.0008㎡·K/W, significantly reducing thermal resistance and improving heat transfer efficiency.
Serrated Fin Design:
The fins are serrated, significantly increasing the heat exchange area and enhancing thermal conductivity, making them suitable for high-temperature and high-pressure environments.
Material Selection:
The base tube and fins can be made of carbon steel, stainless steel, or alloy steel, offering strong corrosion resistance and suitability for harsh operating conditions such as boilers and petrochemical equipment.
Typical Application Scenarios:
- Boilers and Heating Furnaces: Used for waste heat recovery to improve energy utilization efficiency.
- Petrochemical Equipment: Such as heat exchangers and condensers, enhancing heat transfer performance.
- Power and Chemical Industries: Suitable for heat exchange requirements of high-temperature and high-pressure media.
The serrated fin structure enhances air disturbance through its edge teeth, reducing boundary layer thermal resistance. Compared to straight fins, it improves heat dissipation efficiency by 15%-20%, especially suitable for dusty environments. Fin spacing is typically 3-8mm and can be adjusted according to operating conditions. For example, in textile industry hot air systems, a spacing of 3-5mm balances heat exchange area and ash accumulation risk.
High Frequency Electric Resistance Serrated Fin Tube Applications:
High frequency electric resistance serrated fin tubes are widely used in industrial waste heat recovery, textile drying, and other fields. For instance, in waste heat boilers, they can achieve heat exchange efficiency exceeding 65%, significantly lowering flue gas temperature. In textile industry applications such as finishing machines or drying furnaces, their high-efficiency heat transfer characteristics can shorten heating time by 30%, control temperature fluctuations within ±2℃, and reduce fiber dust accumulation by 40%-50%, extending cleaning cycles to 6-8 months.
Structure:
The base tube is commonly made of carbon steel or stainless steel, while the fins are often made of steel or aluminum strips. The welding process requires a weld width greater than the fin thickness and a weld rate exceeding 99%. Fin spacing tolerance is ±0.2mm, ensuring long-term operational stability. The service life can reach 10-15 years, more than double that of traditional processes, with maintenance costs reduced to below 60% of traditional equipment.
High Frequency Electric Resistance(HFW) Serrated Finned Tube Size and Material:
| Tube O.D.: | 16 to 273 (mm) | 3/8” to 10”(NPS) |
| Tube Wall Thk.: | 2 to 28.6 (mm) | 0.08” to 1.1” |
| Tube Length: | ≤28,000 (mm) | ≤92 ft |
| Fin Thk.: | 0.5 to 3.5 (mm) | 0.02” to 0.14” |
| Fin Height: | 8 to 35 (mm) | 0.31” to 1.3” |
| Fin Pitch: | 3 to 333 FPM | 1 to 8 FPI |
| Fin Type: | Solid, “U”or“V” Serrated | |
| Fin Material: | C.S. (most common grade: 08F, SPCC)S.S. (most common grade are AISI 304, 316, 409, 410, 321,347 ) | |
| Tube Material: | C.S. (most common grade: A106 Gr.B, A210, A192)S.S. (most common grade are TP304, 316, 321, 347 )
A.S.(most common grade are T/P5,9,11,22,91 ) Duplex Steel(most common grade are 2205 etc. ) |
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| * This table is used as a general guide to our capabilities, please call us for any other customized cases. | ||