... parts, marine power plant. Name: 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 ... tubes of 2-fold, an expansion of the heating surface. H-economizer flash resistance welding processes used, the welding seam after ...