WAC 296-806-40518. 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 a 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. Reference: Flanges that are refaced or trued need to satisfy minimum dimension requirements specified in Safety Requirements for the Use, Care and Protection of Abrasive Wheels, ANSI B7.1-2000.