Leakage problems caused in large diameter gasketed flanged connections in piping systems are closely related to deformation of flanges caused by the high thrust force and rather low rigidity of the flanges. Therefore, it is necessary to understand the deformation characteristics of flanged connections when they are tightened and pressurized. In this study, experiments were carried out using a 16-inch gasketed flanged connection to examine the stress and strain in the flanges. In order to clarify the deformation characteristics of the gasketed flanged connection, a method to analyze stresses and deformations of a gasketed flanged connection was demonstrated using the classical theory by Timoshenko. Recently, finite element analysis (FEA) has widely been used in the analysis of gasketed flanged connections. However, analyses of flanged connection based on the analytical method using strength of materials are still important when parametric calculations of flanged connection are necessary. The experimental results and the analytical ones were compared and discussed to clarify the sealing behaviors of large diameter gasketed flanged connection.

No abstract

Effects of gasket characteristics on the sealing performance of large diameter blind flange connections 1 ．緒言