(1) Excellent anti-wear performance (2) Less fouling (3) Compact space (4) Welded Joints less (5) Stability H fin tube, known as Square fin tube & H Finned economizer, finned tube, is used in boilers parts, marine power. It is a kind of boiler parts, to have two steel circular symmetry to be welded on fluorescent tubes to form fins positive shap much like letter "H", so called H-fin tube. H- ...