ASME B16.36-2006 pdf download.Orifice Flanges. 8.2 Location 8.2.1 Measurement. The24mm(0.94in.)dimension for raised fact and 19 mm (0.75 in.) for ring joint shall be measured at the bore. 8.2.2 IdentifIcation. For ring ,oint flanges requiring dltL’TdtiOfl Ut pussun tap location due to interfince with the ring groove other than methods provided in this Standard, such alteration shall be identified per agreement...