High frequency welded spiral fin tubes this is important in maintaining negligible resistance to heat transfer between the fin and tube. Hf welded fins shows less extensive heat affected zone, the affected depth is minimal when compared to other types of welding.

High frequency welded spiral fin tubes this is important in maintaining negligible resistance to heat transfer between the fin and tube. Hf welded fins shows less extensive heat affected zone, the affected depth is minimal when compared to other types of welding.