According to the difference of head geometry, size and purpose, heads can be divided into oval heads, spherical crown heads, dish heads, cone heads, flat caps, etc. Oval heads are actually used in many cases, and the heads used in normal pressure vessels, medium pressure and low pressure vessels are preferred to use oval heads. Spherical crown-shaped heads are often used in the middle heads of two independent pressure spaces, or the two end heads of a vessel with lower pressure.

Commonly used in engineering are mainly the same thickness of non-folded oblique cone shells, a combination of multi-section cone shells with the same half apex angle and different thicknesses, cone shells with folded edges and straight sections at the large or small end, and The large end or the small end has a non-folded cone shell with a reinforced section.

In the design process, according to the actual situation and engineering parameters, through calculation, the specific type of conical headrequired is determined to meet the specific requirements of strength and use.