ASME B16.36 pdf download Orifice Flanges 3.3 Plugs Pressure retaining plugs shall conform to ASME B16.11, unless otherwise agreed between pur- chaser and manufacturer. Plug material shall be at least as corrosion resistant as the corresponding flange material. 4 SIZE Orifice flange sizes are indicated by the nominal pipe size to which they are attached. Only those listed in Tables...