Sprial fin tube, finned tube, is a kind of boiler parts, used in evaporator ... leading manufacturers of finned tube, extended surface tube, spiral fin tube and H fin tube in China. They are ... in hand, welcome to contact us. Fin tube Specification:Chinese GB standard or equivalent ASME standard ... steel, stainless steel, Aluminium and alloy steel; Bare tube size:OD20mm-OD273mm; Fins Pitch: 3mm-30mm; Fins ...