The heads can be divided into the following types according to their shapes:

Flat head: also known as flat bottom head, the top and bottom are flat heads.

Spherical head: The head is spherical and is generally used for containers with higher pressure. The structure of the spherical head can provide uniform pressure distribution and reduce stress concentration.

Elliptical head: The head is elliptical, also known as the focal radius head. The elliptical head is relatively superior to the spherical head in terms of stress distribution and stiffness, and is suitable for containers with higher pressure and better fluid dynamics performance.

Dome head: The head is arc-shaped, also known as the arch head. Dome heads are usually used for containers with larger diameters, such as storage tanks, boilers, etc.

Conical head: The head is conical, suitable for some special container designs or fluid flow requirements.

These head types are based on different container requirements and engineering designs. Choosing the right head shape can provide good sealing performance and structural strength.