The elliptical head is also known as an elliptical head and an elliptical head, which is a head consisting of two parts of a rotating elliptical sphere and a cylindrical straight section. Its function is that the 1. pipes come to the head, and they are not allowed to extend. They are welded to the pipe with a head and used as a end. 2. on the pressure vessel, there is a head up and down, the middle is a straight pipe, used as a tank for pressure vessels. An elliptical head with a ratio of 2 to the length of a long and short axis of a rotating ellipsoidal busbar is used as a standard elliptical head. The mechanical properties of the elliptical head are second only to the hemispherical head, but better than the disc head. Because the depth of the elliptical head is between hemispherical and saucer heads, the requirement for the stamping equipment and die is also between the two, which is easier than the hemispherical head, and harder than the dish head. In recent years, because of the use of spinning process, it has brought convenience for the manufacture of large diameter oval head. The elliptical head is widely used in medium and low pressure vessels because of its good comprehensive performance.