Anchor Flange Sizes Size range is nominal pipe size for 6--- 36 as indicated in the chart below To supply an anchor flange we need the internal diameter or (id) of the pipe that the flanges fits to. Pipeline Anchor Flanges Materials and Specifications The common material for anchor flanges is SA105 carbon steel. They are also made from SA694 F52 and F60. The specifications are according to ANSI B16.5 Packing in plywood case.
