Dished ends, also known as heads, are curved or dish-shaped components used to close the ends of pressure vessels like tanks and boilers. They come in several different types, each with specific characteristics and applications. Here are some common types of dished ends:
- Elliptical Head (2:1 Elliptical Head):
- This is one of the most common types. It has an elliptical shape, with the major axis approximately twice the minor axis. It provides good performance for both pressure and stress distribution.
- Hemispherical Head:
- A hemispherical head has a half-sphere shape. It offers excellent pressure containment and is often used in high-pressure vessels.
- Tori conical Head (Korbbogen Head):
- This type has a shape that’s a combination of a torus (doughnut shape) and a conical head. It’s used when space constraints are important.
- Flat Head (Dished Head):
- A flat head is essentially a flat plate welded to the end of a cylindrical vessel. It’s used when the design calls for a flat surface at the end of the vessel.
- Semi-Elliptical Head (also known as 2:1 Semi-Elliptical Head):
- This head shape is similar to the elliptical head but with a shorter major axis. It’s used in various applications.
- Conical Head (Knuckle Head):
- Conical heads have a conical shape and are used in some pressure vessel designs, particularly when a sloped bottom is desired.
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