High frequency welded open toothed finned tubeThe welding equipment and performance parameters must comply with the "Technical Conditions for Manufacturing High Frequency Resistance Welded Spiral Finned Tubes for Boilers" and "Technical Conditions for Manufacturing High Frequency Resistance Welded Spiral Finned Tubes for Boilers"》The requirements. Its performance parameters are: welding power supply power of 300KW; The maximum speed of the spindle is 300 revolutions per minute; The weldable diameter isφ25-φ168mm; Weldable steel pipes with a thickness of 1-10mm; Weldable steel pipe length is 0.5-15m; The height of the weldable fins is 8-20mm; The thickness of the weldable fins is 0.8-2.5mm; The fin pitch is 4.5-15mm; Weldable materials include carbon steel, low-carbon steel, and stainless steel.

High frequency welded open toothed finned tubeCompared to non toothed fins, fins have a greater disturbance effect on the gas outside the tube, increasing the flow velocity of the gas and allowing it to flow effectively in turbulent conditions, effectively enhancing heat transfer efficiency. In the case of high gas pressure drop, generally toothed finned tubes can effectively achieve the desired effect, and this structure of finned tubes is commonly used in boiler economizers and flue gas waste heat recovery equipment.