... Single H fin tube, known as Square fin tube & Fin economizer, is used in boilers, marine power, heat exchanger components. Definition:H fin tube, ... also know as Single H fin tube, H fin economizer, H fin tube economizer, H type finned tube, square fin tube.It ... carbon steel, stainless steel, Aluminium and alloy steel;Bare tube size:OD20mm-OD273mm;Fins Pitch: 3mm-30mmFins Height: 10mm- ...