PRESSURE VESSEL DESIGN MANUAL – General Topics

In general, pressure vessels designed in accordance with the ASME Code, Section VIII, Division 1, are designed by rules and do not require a detailed evaluation of all stresses. It is recognized that high localized and secondary bending stresses may exist but are allowed for by use of a higher design margin and  design rules for details. It is required, however, that all loadings (the forces applied to a vessel or its structural attachments) must be considered. (See Reference 1, Para. UG-22). While Section VIII, Division 1 provides formulas for thickness and stress of basic components, it is up to the designer to select appropriate analytical procedures for analyzing other components and to combine the calculated stresses in a manner appropriate with the intended operation of the equipment for an economical and safe design. For the supporting structures, the designer must also abide to the load combinations determined by the applicable building code.

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