... exchanger components. Definition:H fin tube, also know as Doulbe H fin tube, H fin economizer, H fin tube economizer, H type finned tube, ... to form fins positive shap much like letter "H", so called H-fin tube. H-economizer widely used in utility boilers, industrial boilers ... of 2-fold, an expansion of the heating surface. H-economizer flash resistance welding processes used, the welding seam after ...