内圧を受ける渦巻き型ガスケット付き管フランジ締結体の応力解析と密封性能評価

概要

論文の詳細を見る
The stresses of a pipe flange connection with a spiral wound gasket under internal pressure are analyzed taking account a non-linearity and a hysteresis of the gasket by using axisymmetric theory of elasticity and finite element method (FEM). The leakage tests were also conducted using the actual pipe flange connections with spiral wound gaskets. Using the contact stress distribution of the pipe flange connections with 3" nominal diameter under internal pressure, the values of the new gasket constants proposed by PVRG are estimated by taking account the changes in the contact stress. A difference in the new gasket constants is substantial between the PVRC values and the estimated results, which are obtained by using the initial clamping stress. However, the difference is small between the PVRC values and the estimated values which are obtained by using the actual gasket stress. In addition, a method for determining the bolt preload for a given tightness parameter is demonstrated. The obtained results for the pipe flange connection are in a fairy good agreement with those obtained by PVRG procedure.
社団法人日本機械学会の論文
2002-07-25