ASME B16.5 is limited to pipe flanges and flanged fittings, blind flanges, reducing flanges, and related flange bolts, flange gaskets, and flange joints. It covers flanges of pressure classes 150, 300, 400, 600, 900, 1500, and 2500. Sizes are given in metric and U.S. customary units from NPS 1⁄2 to