Shanghai Jinshi Suotai Mechanical & Electric Equipment Co., Ltd. Designs and manufactures all kinds of finned tubes. 1, finned tube function: heat transfer;2, the fin-tube type: DR (extrusion type), L (winding type), high frequency welding;3, the fin-tube material: 1, base tube: carbon steel, stainless steel, copper, copper alloy, titanium and so on. 2, fin: aluminum (extruded type or wound type ...