Shape and structure:

Hemispherical heads: Usually refers to a complete hemispherical structure with a smooth curved surface and no obvious segmentation or folding edges.

Dished discs: Although it is also based on the spherical surface design, its structure usually includes a section of cone or cylinder connected to the spherical cap part, presenting a spherical part with a taper or straight edge.

Manufacturing difficulty:

Hemispherical heads: Due to its simple structure, it is usually relatively easy to manufacture, especially when using stamping or forging processes.

Dished discs: Due to its combination of spherical and conical or straight edge parts, the manufacturing process may require more complex processes and more processes, such as welding.

Applications:

Hemispherical heads: Often used in high pressure, high temperature or corrosive media environments because of its good force performance and corrosion resistance.

Dished discs: Its structure and strength characteristics make it suitable for the manufacture of various pressure vessels, especially in situations where it is necessary to withstand a certain pressure and maintain sealing performance.

Sealing performance:

Hemispherical heads: Due to its compact structure, the connection with the container body usually has good sealing performance.

Dished discs: Due to the presence of straight edges or tapered parts, the connection with the container body may require a more sophisticated sealing design to ensure a good sealing effect.