Reducing bending stress in fasteners used in flanged connections

摘要

An apparatus for reducing the bending stress imparted to threaded fasteners in flanged connections is disclosed. In one embodiment, a stress reducing washer (130) is positioned between the head (144) of a threaded fastener (120) and a counterbore (128) in the back face (126) of a flange (102) , the stress reducing washer (130) having a tapered surface (140), to compensate for flange deflection during tightening of the fastener (120). A further embodiment is shown without the stress reducing washer, the back face of the flange having a tapered surface instead (see figure 8).