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Effect of Helix Angle on the Bending Capacity of a 5 Inch API-Style Threaded Flange

[+] Author Affiliations
Young-Hoon Han, Blake Shirley, Jason Pivowar

Cameron, A Schlumberger Company, Houston, TX

Paper No. PVP2018-85162, pp. V005T05A010; 6 pages
doi:10.1115/PVP2018-85162
From:
  • ASME 2018 Pressure Vessels and Piping Conference
  • Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition
  • Prague, Czech Republic, July 15–20, 2018
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5166-1
  • Copyright © 2018 by ASME

abstract

This paper investigates the effect of helix angle on the structural bending capacity of an API 5-1/8 inch 15,000 psi rated threaded flange under internal pressure and external tension and bending. The three-dimensional finite element flange connection is analyzed with and without the helix angle, and API 17TR8 criteria is selected as a standard to calculate capacity. It was found that the helix angle model predicts a more conservative bending capacity with low internal pressure when compared to the model without a helix angle. At higher bore pressures, the roles reverse and the bending capacity predicted by the helix angle model is less conservative than the non-helix angle model. This disparity is diminished as external tension is increased.

Copyright © 2018 by ASME

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