Effects of scattered bolt preload on the sealing performance of pipe flange connection with gaskets under external bending moment and internal pressure

Toshiyuki Sawa, Yoshio Takagi, Koji Sato, Yuya Omiya, Hayato Doi

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

2 Citations (Scopus)

Abstract

Bolted pipe flange connections have been widely used in mechanical structures such as oil, chemical plants and so on. Sometimes leakage accidents occur from the connections. In assembling the pipe flange connections, the bolt preloads are scattered and then the connections are subjected to external bending moment due to earthquake as well as internal pressure. In the present paper, the changes in the axial bolt forces are measured in assembling. The bolts are tightened with torque wrench. Using the history of the bolt force changes, the gasket stress distributions on the connection with gaskets are analyzed using FEM. Then the gasket stress distributions on the connections under external bending moment and internal pressure are analyzed. Using the gasket stress distributions, the amount of leakage of the connections is estimated while the basic gasket characteristics have been measured according to JIS B 2251. The amount of leakage of the connection was measured for the various gasket stresses. The estimated results are in a fairly good agreement with the measured results. It is found that the effect of the scatter of bolt preload is substantial on the sealing performance of the connections. Discussion is made on the sealing characteristics of the connections. The change of axial bolt force obtained from experimental result and FEM result are fairly good agreement.

Original languageEnglish
Title of host publicationASME 2012 Pressure Vessels and Piping Conference, PVP 2012
Pages3-9
Number of pages7
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

    Sawa, T., Takagi, Y., Sato, K., Omiya, Y., & Doi, H. (2012). Effects of scattered bolt preload on the sealing performance of pipe flange connection with gaskets under external bending moment and internal pressure. In ASME 2012 Pressure Vessels and Piping Conference, PVP 2012 (pp. 3-9). (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 2). https://doi.org/10.1115/PVP2012-78411