API TR 6AF2:1999

Indicates increased load carrying capacity for several flanges based on separate stress limiting criteria. These stress limiting charts were not provided separately in the original work in API Bulletin 6AF, which combined them with leakage criteria. The three-dimensional model analyses of this study provide verification that exisymmetric finite elements results of flanges, as used in Bulletin 6AF, are conservative. Additionally, this study determined a few flanges to have less loading capacity than originally defined in API Spec 6A for makeup loading, and thus have been reduced to meet design requirements.