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The Elliptical Head is the head composed of two parts: the rotating elliptical sphere and the cylindrical straight section. Elliptical Head with a ratio of 2.0 to the length and length of the bus of a rotating is traditionally called a standard Elliptical Head.The mechanical properties of Elliptical Head are second only to that of Semi-Spherical Head, but better than Dish Head.Because of its good comprehensive performance, it is widely used in low and medium Pressure Vessels.In recent years, it is convenient to manufacture large diameter Elliptical Head because of the spinning technology.