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Square Root 3: Background to the New Design Margin for High Pressure Vessels

[+] Author Affiliations
Jan Keltjens

SABIC EuroPetrochemicals, Geleen, The Netherlands

Philip Cornelissen

ExxonMobil Chemical Belgium, Zwijndrecht, Belgium

Peter Koerner, Waldemar Hiller, Rolf Wink

Uhde High Pressure Technologies GmbH, Hagen, Germany

Paper No. PVP2005-71295, pp. 55-59; 5 pages
  • ASME 2005 Pressure Vessels and Piping Conference
  • Volume 5: High Pressure Technology, Nondestructive Evaluation, Pipeline Systems, Student Paper Competition
  • Denver, Colorado, USA, July 17–21, 2005
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4190-1 | eISBN: 0-7918-3763-7
  • Copyright © 2005 by ASME


The ASME Section VIII Division 3 Pressure Vessel Design Code adopted in its 2004 edition a significant change of the design margin against plastic collapse. There are several reasons and justifications for this code change, in particular the comparison with design margins used for high pressure equipment in Europe. Also, the ASME Pressure Vessel Code books themselves are not always consistent with respect to design margin. This paper discusses not only the background material for the code change, but also gives some practical information on when pressure vessels could be designed to a thinner wall.

Copyright © 2005 by ASME



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