WAC 296-807-18055. Make sure flanges are in good condition

(1) You must make sure flange bearing surfaces are in good condition. (2) You must replace or remachine any flange with a mounting surface that has any of the following problems: (a) Warped; (b) Burred on the bearing surface; (c) Excessively worn (thickness or diameter); (d) Out of true. Note: Flanges that are refaced or trued need to satisfy minimum dimension requirements specified in ANSI B7.1-2000, Safety Requirements for the Use, Care and Protection of Abrasive Wheels.