... fin tube, known as Double H / Square fin tube & Fin economizer, is used in boilers, marine power, heat ... tube economizer, H type finned tube, square fin tube.It is a kind of boiler parts, to have ... :H-economizer two rectangular fin, similar to a square, its edge length for the fluorescent tubes of ... rigid structure, and can be applied to a longer tube row occasions.Performance characteristics:(1) ...