Pipe sizes

Steel tubes normal threaded
The outer diameter of the tube D [mm] Nominal size in mm DN [mm] Nominal size in inches DN (Js) [″]
17,1 10 3/8
21,4 15 1/2
26,9 20 3/4
33,7 25 1
42,4 32 1 1/4
48,3 40 1 1/2
60,2 50 2