Manufacturing Process The High Frequency Resistance Welding process
usually employs 400, 000 Hz current. With this
technique, the fin is wound on edge around the
tube spiraly and a continuous weld is
obtained. The High Frequency Resistance Welding process
produces a strong metallurgical bond between
the fin and the tube while minimizing the heat
affected zone (HAZ) in the tube. PROGEN follows International Standards for
Dimensions, Tolerances and Tests for High
Frequency Resistance Welded Finned Tubes.
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