Power 2024 Asme B16.5. The current ansi / asme flange specifications of b16.5 and b16.47 trace their roots to the old b16.1 specification from decades past, which consisted primarily of cast iron. Asme b16.5 is crucial for governing the design, manufacture, and installation of steel flanges and flanged fittings.

Table 6 of b16.5 dictates the max size a hole in a blind flange may be (without affecting the mawp of the flange) before you need to ‘step up’ to reducing. In stock and ready to ship.