From the leakage tightness consideration, the behavior of gasketed joint relies very much on the actual gasket load and its variation during the different operating conditions. With the future implementation by the ASME of new design rules based on tightness, a more meaningful and precise evaluation of the gasket load is useful for the purpose of improved prediction of joint tightness. A new design procedure based on the traditional code design philosophy that also accounts for the flexibility of all elements of the joint as well as tightness and gasket creep is suggested. In this paper a general comprehensive method based on the gasket-bolt-flange elastic interaction is presented for the analysis of the joint. The proposed analytical model that is implemented in the “TightFlange” program will be supported by a numerical FEM and experimental investigations to assess the effect of the mechanical and thermal loading including pressure, external loads, thermal expansion and gasket creep on the leakage behavior of gaskets.

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