Water pipes in terms of external diameter and pressure (EN 1452)
فشار کار (Bar) 6 8 10 12/5 16 20 25
O.D. (mm) Wall Thickness  (mm)
20 - - - - 1/5 1/9 -
25 - - - 1/5 1/9 2/3  
32 - 1/5 1/6 1/9 2/4 2/9 -
40 1/5 1/6 1/9 2/4 3/0 3/7 -
50 1/6 2/0 2/4 3/0 3/7 4/6 -
63 2/0 2/5 3/0 3/8 4/7 5/8 -
75 2/3 2/9 3/6 4/5 5/6 6/8 -
90 2/8 3/5 4/3 5/4 6/7 8/2 -
110 2/7 3/4 4/2 5/3 6/6 8/1 10
125 3/1 3/9 4/8 6/0 7/4 9/2 11/4
160 4/0 4/9 6/2 7/7 9/5 11/8 14/6
200 4/9 6/2 7/7 9/6 11/9 14/7 18/2
250 6/2 7/7 9/6 11/9 14/8 18/4  
315 7/7 9/7 12/1 15 18/7 23/2 -
400 9/8 12/3 15/3 19/1 23/7 29/4 -
450 11 13/8 17/2 21/5 26/7 33/1 -
500 12/3 15/3 19/1 23/9 29/7 36/8 -