Tables above show the flanges dimensions in relation to the nominal pressure (PN 6, PN10 and PN16) and according to the standards.

The abbreviation DN followed by the numerical value indicates the nominal diameters. The nominal diameter DN is a conventional value by which the diameters of axial symmetrical mechanical components such as flanges and valves are identified.

EN1092-2 PN6; EN1092-2 PN10; EN1092-2 PN16; ANSI B16.1 series 125 lbs; BS10 table D; BS10 table E.