Fem stress analysis and the sealing performance evaluation in bolted flange connections with ring joint gasket subjected to internal pressure: Effect of scatter in bolt preloads

Koji Kondo, Shota Tsubaki, Toshiyuki Sawa, Tsutomu Kikuchi, Yuya Omiya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Bolted flange connections with ring joint gaskets have been used to seal the inner fluid under higher internal pressure and higher temperature conditions where soft gaskets such as compressed sheet gaskets cannot be applied. Bolted flange connections are frequently tightened using torque wrench, and it is known that the values of bolt preloads are scattered. The effect of the scatter on the sealing performance for bolted flange connections with compressed sheet gasket or semi-metal gasket has been examined. However, no research on the characteristics for the bolted flange connections with ring joint gasket has been found. It is necessary to know the effect of the scattered bolt preloads on the sealing performance and mechanical behavior of the connection with ring joint gasket. In addition, it is important to know an optimum method for determining the bolt preloads taking account of the scatter in bolt preloads. In this paper, leakage tests for bolted flange connections with octagonal ring joint gaskets were conducted for cases where the bolt preloads are uniform and scattered. The sealing performance of these connections with ring joint gaskets was measured and evaluated. In addition, the leak rate was estimated using the contact gasket stress distributions of the connections when the bolt preloads were uniform and scattered using 3-D FEM. Finally, the measured leak rate for the connection using helium gas was compared with the estimated results. The estimated results are in fairly good agreement with the measured values. It is found that the sealing performance of the connections tightened with the uniform bolt methods is better than that with scattered bolt preloads.

Original languageEnglish
Title of host publicationASME 2012 Pressure Vessels and Piping Conference, PVP 2012
Pages147-154
Number of pages8
DOIs
Publication statusPublished - Dec 1 2012
Externally publishedYes
EventASME 2012 Pressure Vessels and Piping Conference, PVP 2012 - Toronto, ON, Canada
Duration: Jul 15 2012Jul 19 2012

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume2
ISSN (Print)0277-027X

Other

OtherASME 2012 Pressure Vessels and Piping Conference, PVP 2012
CountryCanada
CityToronto, ON
Period7/15/127/19/12

ASJC Scopus subject areas

  • Mechanical Engineering

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  • Cite this

    Kondo, K., Tsubaki, S., Sawa, T., Kikuchi, T., & Omiya, Y. (2012). Fem stress analysis and the sealing performance evaluation in bolted flange connections with ring joint gasket subjected to internal pressure: Effect of scatter in bolt preloads. In ASME 2012 Pressure Vessels and Piping Conference, PVP 2012 (pp. 147-154). (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 2). https://doi.org/10.1115/PVP2012-78420