Axisymmetric, Nonidentical, Flat Face Flanges With Metal-to-Metal Contact Beyond the Bolt Circle

Abstract

A method of analyzing a pair of nonidentical, axisymmetric flat face flanges with metal-to-metal contact beyond the bolt circle is described. The design method takes into account interaction between opposing flanges in a bolted closure and provides for compatibility of deformations of all elements comprising the closure. The case of a blind cover to an integral flange having a hub of uniform thickness is described in detail. However, the same analytical approach can be extended to cover a tapered, hubbed flange or the general situation where a reducing flange is substituted for the blind cover.