In 2010, PCC-1 introduced an alternative methodology for deriving a target torque aimed at determining the appropriate assembly bolt stress in a bolted joint assembly. This method looks at the joint system as a whole and considers each of the following:Sufficient gasket stress to ensure saleability – the bolt/stud torque must be adequate to properly seat the gasket and maintain the seal by compensating for relaxation losses and the internal operating pressure. • Gasket stress limits – the bolt/stud torque must be specified to ensure that the maximum compressive limit of the gasket material is not exceeded. • Bolt/stud stress limits – the bolt/stud torque must be specified to ensure that the yield strength of the fasteners is not exceeded. • Flange stress limits – the bolt/stud torque must be specified to ensure that the flanges do not experience excessive rotation and/or permanent deformation.Contact me for further information and case studies.