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  serrated fin tube for heat exchanger

 Hf welded spiral finned tube is the most widely used of the spiral

finned tube, widely used in electric power, metallurgy, cement

industry preheating collection and petrochemical industries. High-

frequency spiral finned tube is welded steel strip coil pipe at the

same time, using high-frequency currents of the skin effect and

proximity effect of steel tube, and surface heat until melted in the

plastic state or steel strip coil, the complete welding under certain

pressure. This kind of high frequency welding as a solidphase

welding. It with Mosaic, brazing (or whole galvanized) method,

whether in product quality (fin of weld rate is high, of 95%), or the

productivity and automation degree, are more advanced.

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