High Frequency Welded Finned Tube Made a technical tie-up and introduced a Finning machine and technology from DENGENSHA, Japan from the beginning. We are the first company for finned tubes in Korea. There are two types of HF finned tube, Solid type and Serrated type. Adhesive strength rate of welded fin over tube is more than 90% of fin thickness, and pulling strength is more than 25ksi. 54,000 pcs of finned tubes a year can be produced (Based on 1.5"OD x 20m). Aluminum and Copper Finned Tube ...