H-finned tube, also known as H-fin tube, H-type rib tube, also known as butterfly tube, it is the two in the middle of the arc of the steel sheet symmetrically welded together with the light tube to form a fin (rib or butterfly), the front shape is quite like the capital letter "H", so called H-type finned tube (H-fin tube). The two fins of the H-finned tube are rectangular, approximately square, and their edges are about twice times longer than those of the light tube. It belongs to the extended heating surface. The H-type finned tube adopts the flash resistance welding process, which has high weld fusion rate, large weld tensile strength and good heat conduction performance after welding. H-type finned tube can also be made into double-tube "double h" fin tube, its structure is good rigidity, can be applied to the long tube row of the occasion.
