Welding Neck Flange Bores
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| Nom. pipe Size |
Outside Diam |
Light Wall 6 |
Sched. 20 |
Sched. 30 |
Std. Wall |
Sched. 40 |
Sched. 60 |
Extra Strong |
Sched. 80 |
Sched. 100 |
Sched. 120 |
Sched. 140 |
Sched. 160 |
Double Extra Strong |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 3/4 1 |
0.840 1.050 1.315 |
.674 .884 1.097 |
— — — |
— — — |
0.622 0.824 1.049 |
0.622 0.824 1.049 |
— — — |
0.546 0.742 0.957 |
0.546 0.742 0.957 |
— — — |
— — — |
— — — |
0.464 0.612 0.815 |
0.252 0.434 0.599 |
| 1-1/4 1-1/2 2 |
1.660 1.900 2.375 |
1.442 1.682 2.157 |
— — — |
— — — |
1.380 1.610 2.067 |
1.380 1.610 2.067 |
— — — |
1.278 1.500 1.939 |
1.278 1.500 1.939 |
— — — |
— — — |
— — — |
1.160 1.338 1.687 |
0.896 1.100 1.503 |
| 2-1/2 3 3-1/2 |
2.875 3.500 4.000 |
2.635 3.260 3.760 |
— — — |
— — — |
2.469 3.068 3.548 |
2.469 3.068 3.548 |
— — — |
2.323 2.900 3.364 |
2.323 2.900 3.364 |
— — — |
— — — |
— — — |
2.125 2.624 — |
1.771 2.300 2.728 |
| 4 5 6 8 |
4.500 5.563 6.625 8.625 |
4.260 5.295 6.357 8.329 |
— — — 8.125 |
— — — 8.071 |
4.026 5.047 6.065 7.981 |
4.026 5.047 6.065 7.981 |
— — — 7.813 |
3.826 4.813 5.761 7.625 |
3.826 4.813 5.761 7.625 |
— — — 7.437 |
3.624 4.563 5.501 7.187 |
— — — 7.001 |
3.438 4.313 5.187 6.813 |
3.152 4.063 4.897 6.875 |
| 10 12 14 16 |
10.750 12.750 14.000 16.000 |
10.420 12.390 13.500 15.500 |
10.250 12.250 13.376 15.376 |
10.136 12.090 13.250 15.250 |
10.020 12.000 13.250 15.250 |
10.020 11.938 13.124 15.000 |
9.750 11.626 12.812 14.688 |
9.750 11.750 13.000 15.000 |
9.562 11.374 12.500 14.312 |
9.312 11.062 12.124 13.938 |
0.062 10.750 11.814 13.564 |
8.750 10.500 11.500 13.124 |
8.500 10.500 11.500 13.124 |
8.750 10.750 — — |
|
18 |
18.000 20.000 24.000 |
17.500 19.500 23.500 |
17.376 19.250 23.250 |
17.124 19.000 22.876 |
17.250 19.250 23.250 |
16.876 18.812 22.624 |
16.500 18.376 22.062 |
17.000 19.000 23.000 |
16.124 17.938 21.562 |
15.688 17.438 20.938 |
15.250 17.000 20.376 |
14.876 16.500 19.876 |
14.438 16.062 19.312 |
— — — |
| 30 36 42 |
30.000 36.000 42.000 |
29.376 35.376 —. |
29.000 35.000 |
28.750 34.750 |
29.250 35.250 41.250 |
— 34.500 — |
— — — |
29.000 35.000 41.000 |
— — — |
— — — |
— — — |
— — — |
— — — |
— — — |