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Variables Affecting Nut Factors for Field Assembled Joints

[+] Author Affiliations
William G. Cooper, Timothy M. Heartwell

VSP Technologies, Prince George, VA

Paper No. PVP2011-57197, pp. 23-27; 5 pages
  • ASME 2011 Pressure Vessels and Piping Conference
  • Volume 2: Computer Technology and Bolted Joints
  • Baltimore, Maryland, USA, July 17–21, 2011
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4452-6
  • Copyright © 2011 by ASME


A great deal of research has been done to determine how to ensure a reliable bolted flange connection. Using a proper bolt torque value during installation helps achieve this goal. Many of the variables used during the calculation of a bolt torque value are easily quantified, but the nut factor has yet to be accurately determined. This paper provides an overview of research recently completed to determine what the real world nut factor is in varying applications.

Copyright © 2011 by ASME



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