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Seismic Design of Cylindrical and Spherical Storage Tanks According to API and Eurocode: A Difficult Merge in Design Philosophies

[+] Author Affiliations
Ch. Botsis, G. Anagnostides, N. Kokavesis

Asprofos Engineering S.A., Kallithea, Athens, Greece

Paper No. PVP2003-2109, pp. 111-117; 7 pages
doi:10.1115/PVP2003-2109
From:
  • ASME 2003 Pressure Vessels and Piping Conference
  • Seismic Engineering
  • Cleveland, Ohio, USA, July 20–24, 2003
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4157-X
  • Copyright © 2003 by ASME

abstract

Herein a comprehensive review and comparison of the parameters used in design of cylindrical tanks according to API 650 and Eurocodes is presented. API 650 is extensively used in many countries, including Greece, for the design of storage tanks. The European Community has developed a set of structural design codes named Eurocodes. They are the gathering and combination of existing design knowledge of many member states. Some of these codes are already mandatory in many member states, whereas others are still under discussion and improvement. The design of storage tanks is covered in the last editions of Eurocodes. It was found that the seismic design according to Eurocodes is more conservative that of API 650. As compared to API 650, the thickness of the first, second, and third courses of storage tanks needs to be increased by 15% or 20% on average, when the seismic design requirements of Eurocodes is used. Similarly the thickness of the bottom plate under the first course, must also be increased to comply with the seismic design requirements of Eurocodes. Most likely Eurocodes will be mandatory in the European Union, and therefore it is important to study and discuss the main differences between API 650 and Eurocodes. Undoubtedly API 650 is a historic and well-tested code. It has been applied in the design of storage tanks all over the world, however compliance with local and European laws is required to issue an installation license.

Copyright © 2003 by ASME

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