In accelerator environments, especially proton machines, high background radiation necessitates the need for quick disconnect vacuum flanges. The use of quick disconnect vacuum flanges significantly reduces the dose of radiation received by workers when installing or removing vacuum chambers in the accelerator. Over the course of many years there have been many designs used for these flanges at Brookhaven National Laboratory for such machines as the Alternating Gradient Synchrotron (AGS), the AGS Booster, and the Relativistic Heavy Ion Collider. Several different flanges with apertures as large as 14 in. in diameter were also evaluated for use in the Spallation Neutron Source project. A summary of various quick connect flanges as well as some commercially available flanges and the evaluation results are presented.