BS 4504 / PN25

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material-composition
NOMINAL PIPE SIZE OUTSIDE DIA. (MM) DIA. OF BOLT CIRCLE (MM) DIA. OF HOLE (MM) NUMBER OF HOLE DIA. OF BORE THICKNESS MIN. (MM) CHAMFERING APPROX. WEIGHT (KG)
  D C h   do t X  
10 90 60 14 4 21 14 3  
15 95 65 14 4 25 14 3  
20 105 75 14 4 31 16 4  
25 115 85 14 4 38 16 4  
32 140 100 18 4 47 18 5  
40 150 110 18 4 53 18 5  
50 165 125 18 4 65 20 5  
65 185 145 18 8 81 22 6  
80 200 160 18 8 94 24 6  
100 235 190 22 8 120 26 6  
125 270 220 26 8 145 28 6  
150 300 250 26 8 174 30 6  
200 360 310 26 12 226 32 6  
250 425 370 30 12 281 35 8  
300 485 430 30 16 333 38 8  
350 555 490 33 16 365 42 8  
400 620 550 36 16 416 46 8  
450 670 600 36 20 467 50 8  
500 730 660 36 20 519 56 8  
600 845 770 39 20 622 68 8