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Determination of MAWP of a Slab Tank Using FEA

[+] Author Affiliations
Yogeshwar Hari

University of North Carolina at Charlotte, Charlotte, NC

Paper No. PVP2006-ICPVT-11-93176, pp. 517-522; 6 pages
doi:10.1115/PVP2006-ICPVT-11-93176
From:
  • ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
  • Volume 1: Codes and Standards
  • Vancouver, BC, Canada, July 23–27, 2006
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4752-7 | eISBN: 0-7918-3782-3
  • Copyright © 2006 by ASME

abstract

The objective of this paper is to determine the maximum allowable working pressure per ASME Code [1] of a slab tank using finite element analysis [2]. The slab tank is to store various criticality liquids used in today’s industry. The slab tank has been designed on the basis of the capacity of the stored liquids. The slab tank design is consists of (a) two long side members, (b) two short side members, (c) top head, and (d) bottom head. The slab tank is supported from the bottom at a height by a rectangular plate enclosure. The heads are designed for internal pressure and static pressure at the bottom where the pressure is the maximum. The slab tank has been designed to withstand internal pressure plus static pressure due to liquid head. The procedure used to determine MAWP is as follows: (1) The dimensioned slab tank is modeled using STAAD III finite element software. (2) Two loading conditions are used: (a) internal pressure; (b) static pressure due to liquid head; (c) combined internal pressure plus static pressure. The maximum stress and deflection is evaluated at the above three conditions for determination of MAWP. The stress due to the static pressure due to liquid will remain the same. Only the stress due to internal pressure can be changed by changing the internal pressure. New internal pressure is calculated to meet the ASME code stress criteria, which then will be the MAWP condition. A procedure is established to determine the MAWP of slab tanks using FEA.

Copyright © 2006 by ASME

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