In accelerator environments especially proton machines, high background radiation necessitates the need for quick disconnect vacuum flanges. The use of quick disconnect 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 different designs used for these flanges at Brookhaven National Laboratory for such machines as the AGS, Booster and RHIC. Several different flanges with apertures as large as 14" diameter were also evaluated for use in the SNS project. A summary of various quick disconnect flanges used at Brookhaven as well as some commercially available flanges and their evaluation results are presented.