Container wall thickness
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For a hermetically sealed internal-pressure vessel with upper and lower end caps, is it calculated that the thickness of the end caps should be less than that of the vessel wall?
It depends on what kind of end cap you have. If it is an elliptical head, according to the formula, it should be slightly thinner than the cylinder.
That’s not necessarily the case; it depends on the type of head. Hemispherical heads are thinner. The thickness of the elliptical head is generally taken to be the same as that of the cylinder.
It depends on the type of end cap: the thickness of an elliptical end cap is roughly the same as that of the cylinder, and it is usually made to have the same thickness; a hemispherical end cap is about half as thick as such an end cap. .
For the calculation of end caps in the shape of ellipses or hemispheres, the thickness is slightly less than that of the cylinder. When determining the nominal thickness, the same value as that of the cylinder is used, with consideration given to factors related to the processing and manufacturing of the end caps as well as the stress conditions in the transition zones of these end caps.
According to the calculations, the head will be slightly thinner than the cylinder body. However, the thickness reduction due to forming and pressing must be taken into account when designing the head; as a result, its thickness should be set at or even one grade higher than that of the cylinder body
Not necessarily; since the hydrostatic pressure of the liquid column is greater than the design pressure, the lower head may become thicker.
Not necessarily; it depends on whether an end cap is used. I just designed a piece of equipment for which the calculated wall thickness was 55.6 mm. An elliptical end cap would require a thickness of 55.3 mm, while a hemispherical end cap would need only about 28 mm. There’s also the issue of hydrostatic pressure due to the liquid column mentioned above; in containers that are relatively tall and where the pressure tends to be at atmospheric levels, the end caps may need to be thicker
The conventional practice is to make the head thickness (referring to the elliptical head) the same as that of the cylinder wall, or slightly thicker than the cylinder wall.