Dimensions of Weld Neck Flange Bores : ASME B16.5
DIMENSIONS OF STAINLESS STEEL
WELD NECK FLANGE BORES
| Nominal Pipe Size | Outside Diameter | Nominal Bore Diameter |
|---|
| Sch.5S | Sch.10S | Sch.10 | Sch.20 | Sch.30 | Sch.40S | Sch.40 | Sch.60S | Sch.80S | Sch.80 | Sch.100 | Sch.120 | Sch.140 | Sch.160 | XX Strong |
|---|
| 1/2 | 0.840 | .710 | .674 | - | - | - | .622 | .622 | - | .546 | .546 | - | - | - | .464 | .252 |
| 3/4 | 1.050 | .920 | .884 | - | - | - | .824 | .824 | - | .742 | .742 | - | - | - | .612 | .434 |
| 1 | 1.315 | 1.185 | 1.097 | - | - | - | 1.049 | 1.049 | - | .957 | .957 | - | - | - | .815 | .599 |
| 1-1/4 | 1.660 | 1.530 | 1.442 | - | - | - | 1.380 | 1.380 | - | 1.278 | 1.278 | - | - | - | 1.160 | .896 |
| 1-1/2 | 1.900 | 1.770 | 1.682 | - | - | - | 1.610 | 1.610 | - | 1.500 | 1.500 | - | - | - | 1.338 | 1.100 |
| 2 | 2.375 | 2.245 | 2.157 | - | - | - | 2.067 | 2.067 | - | 1.939 | 1.939 | - | - | - | 1.687 | 1.503 |
| 2-1/2 | 2.875 | 2.709 | 2.635 | - | - | - | 2.469 | 2.469 | - | 2.323 | 2.323 | - | - | - | 2.125 | 1.771 |
| 3 | 3.500 | 3.334 | 3.260 | - | - | - | 3.068 | 3.068 | - | 2.900 | 2.900 | - | - | - | 2.624 | 2.300 |
| 3-1/2 | 4.000 | 3.834 | 3.760 | - | - | - | 3.548 | 3.548 | - | 3.364 | 3.364 | - | - | - | - | - |
| 4 | 4.500 | 4.334 | 4.260 | - | - | - | 4.026 | 4.026 | - | 3.826 | 3.826 | - | 3.624 | - | 3.438 | 3.152 |
| 5 | 5.563 | 5.345 | 5.295 | - | - | - | 5.047 | 5.047 | - | 4.813 | 4.813 | - | 4.563 | - | 4.313 | 4.063 |
| 6 | 6.625 | 6.407 | 6.357 | - | - | - | 6.065 | 6.065 | - | 5.761 | 5.761 | - | 5.501 | - | 5.187 | 4.897 |
| 8 | 8.625 | 8.407 | 8.329 | - | 8.125 | 8.071 | 7.981 | 7.981 | 7.813 | 7.625 | 7.625 | 7.437 | 7.187 | 7.001 | 6.813 | 6.875 |
| 10 | 10.750 | 10.482 | 10.420 | - | 10.250 | 10.136 | 10.020 | 10.020 | 9.750 | 9.750 | 9.564 | 9.312 | 9.062 | 8.750 | 8.500 | - |
| 12 | 12.750 | 12.438 | 12.390 | - | 12.250 | 12.090 | 12.000 | 11.938 | 11.626 | 11.750 | 11.374 | 11.062 | 10.750 | 10.500 | 10.126 | - |
| 14 | 14.000 | 13.688 | 13.625 | 13.500 | 13.375 | 13.250 | 13.250 | 13.124 | 12.812 | 13.000 | 12.500 | 12.124 | 11.814 | 11.500 | 11.188 | - |
| 16 | 16.000 | 15.670 | 15.625 | 15.500 | 15.375 | 15.250 | 15.250 | 15.000 | 14.688 | 15.000 | 14.312 | 13.938 | 13.564 | 13.124 | 12.812 | - |
| 18 | 18.000 | 17.670 | 17.625 | 17.500 | 17.375 | 17.124 | 17.250 | 16.876 | 16.500 | 17.000 | 16.124 | 15.688 | 15.250 | 14.876 | 14.438 | - |
| 20 | 20.000 | 19.625 | 19.564 | 19.500 | 19.250 | 19.000 | 19.250 | 18.814 | 18.376 | 19.000 | 17.938 | 17.438 | 17.000 | 16.500 | 16.062 | - |
| 24 | 24.000 | 23.564 | 23.500 | 23.500 | 23.250 | 22.876 | 23.250 | 22.624 | 22.062 | 23.000 | 21.562 | 20.938 | 20.376 | 19.876 | 19.312 | - |
All dimensions are in inches.
