High-frequency welded spiral finned tube is a high efficiency energy saving heat element, it used ninety years of national patent technology using high frequency welding production technology, with high frequency power source, strip, pipe and heating, so that the welding together into a whole, has high efficiency of heat exchange, the heat radiating area is large, long service life, adaptation wide temperature range, high pressure bearing. Widely used for waste heat recovery, petrochemical, power plant boiler, economizer, bus, industrial and civil building heating, refrigeration, medical drying, wood drying, grain drying system and other industries.