Standards 20: Cast Iron Flanges – ASME/ANSI Class 25

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Cast Iron Flanges – ASME/ANSI Class 25 ASME/ANSI B16.1 – 1998 – Cast Iron Pipe Flanges and Flanged Fittings – Class 25 Flanges – outside and inside diameters, bolt circles, numbers and diameters of bolts