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On the Effect of Temperature on Tightening Characteristics of Gaskets

[+] Author Affiliations
Jaroslav Bartonicek

GKN Gemeinschaftskernkraftwerk Neckar, Neckarwestheim, Germany

Manfred Schaaf, Friedrich Schoeckle

AMTEC Advanced Measurements, Lauffen, Germany

Paper No. PVP2002-1080, pp. 35-43; 9 pages
doi:10.1115/PVP2002-1080
From:
  • ASME 2002 Pressure Vessels and Piping Conference
  • Analysis of Bolted Joints
  • Vancouver, BC, Canada, August 5–9, 2002
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-1944-2
  • Copyright © 2002 by ASME

abstract

To study the effect of temperature on the tightening characteristics of gaskets, leak rate tests were performed using a servo-hydraulic test equipment (short term temperature exposure). According to the tests the tightening behaviour of gaskets made of fibre based sheet material improved with temperature due to additional deformation of the gaskets during the test. In tests with camprofile gaskets with graphite layers there was no significant additional deformation of the gasket thus the leak rates showed no difference between room temperature and elevated temperature. Regarding long term exposure to temperature it is expected that with a lot of gasket materials the leak rates increase after a certain aging period. It is too expensive to study these effects with complex servo-hydraulic test rigs. Therefore a more simple test rig was developed that can be loaded in hydraulic test rigs (to determine leak rate vs. gasket stress curves) and that can be exposed to temperature in an oven or by a special heating device.

Copyright © 2002 by ASME
Topics: Temperature , Gaskets

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