Face to face according to ANSI B16.10

Flange drilled is according to ANSI B16.1/16.5

CLASS125: Flat face flange

DN L D K B C n- Ød H H1
CL125/150 CL125/150 CL125/150
50 178 152 120.5 16 200 4-Ø19 255 285
65 190 178 139.50 18 200 4-Ø20 280 310
80 203 191 152.50 19 200 4-Ø21 300 330
100 229 229 190.50 24 280 4-Ø22 344 374
125 254 254 216.00 24 280 4-Ø23 410 440
150 267 279 241.50 26 280 4-Ø24 441 471
200 292 343 298.50 28 320 4-Ø25 525 559
250 330 406 362.00 30 350 4-Ø26 614 644
300 356 483 432.00 32 350 4-Ø27 700 730