Process Equipment and Plant Design
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

Less than
More than
Equal to
Either B or C; depends on maximum permissible internal pressure

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Process Equipment and Plant Design
Generally, elliptical dished heads

Are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D
Resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter
Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m²
All of these

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