Its length will have no effect on stresses induced in an internally pressurised vessel other than those induced by its support. CylinderĪny longitudinal container will naturally try to form a cylinder under sufficient internal pressure. A properly designed pressure vessel is one that will do so with no risk of damage, and the ASME VIII design code is generally considered to be the most appropriate means of achieving this. Moreover, it should have no irregularities, corners or flat surfaces.Ī pressure vessel is a container of any size and shape that will maintain its integrity (but not necessarily its size and shape) against an internally or externally pressurised fluid.
The cross-section of any internally or externally pressurised vessel (container) should be circular for maximum pressure-carrying capacity and/or stability. ASME's considerable long-term experience provides far greater confidence in minimising the likelihood of unexpected collapse, given certain design criteria and limitations. Moreover, physical collapse due to external pressure is always as a result of elastic instability and far too difficult to predict using general mathematical principles.
The minimum required wall thickness of pressurised spheres and cylinders could be determined using classical theory but this is not normally considered appropriate for the safety of pressure vessels, which usually contain considerable levels of stored energy⁽¹⁾ and are frequently in close proximity to operating personnel. conforms to ASME VIII, Division 1 design codeĬalQlata's pressure vessel calculator does not include non-circular pressure vessels CalQlata's pressure vessel calculator determines the minimum permissible wall thickness(es) or maximum permissible pressure(s) for spherical or cylindrical pressure vessels and their heads ( Fig 1) that.
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