Anchor Flange Sizes
Size range is nominal pipe size for value="6" unitname="”">6” --- value="36" unitname="”">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 SAvalue="694" unitname="F">694  F52 and F60.

The specifications are according to ANSI B16.5
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