Welding Neck Flange Bores
| Nominal |
Nominal |
NOMINAL INSIDE DIAMETER |
Nominal |
| Pipe |
Outside |
Sched. |
Sched. |
Sched. |
STD |
Sched. |
Sched. |
EX. |
Sched. |
Sched. |
Sched. |
Sched. |
Sched. |
XX |
Pipe |
| Size |
Diameter |
10 |
20 |
30 |
WALL |
40 |
60 |
STG. |
80 |
100 |
120 |
140 |
160 |
STG. |
Size |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1/2
|
0.840 |
0.674 |
- |
- |
0.622 |
0.622 |
- |
0.546 |
0.546 |
- |
- |
- |
0.464 |
0.252 |
1/2 |
| 3/4 |
1.050 |
0.884 |
- |
- |
0.824 |
0.824 |
- |
0.742 |
0.742 |
- |
- |
- |
0.612 |
0.434 |
3/4 |
| 1 |
1.315 |
1.097 |
- |
- |
1.049 |
1.049 |
- |
0.957 |
0.957 |
- |
- |
- |
0.815 |
0.599 |
1 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 11/4 |
1.660 |
1.442 |
- |
- |
1.380 |
1.380 |
- |
1.278 |
1.278 |
- |
- |
- |
1.160 |
0.896 |
11/4 |
| 11/2 |
1.900 |
1.682 |
- |
- |
1.610 |
1.610 |
- |
1.500 |
1.500 |
- |
- |
- |
1.338 |
1.100 |
11/4 |
| 2 |
2.375 |
2.157 |
- |
- |
2.067 |
2.067 |
- |
1.939 |
1.939 |
- |
- |
- |
1.687 |
1.503 |
2 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 21/2 |
2.875 |
2.635 |
- |
- |
2.469 |
2.469 |
- |
2.323 |
2.323 |
- |
- |
- |
2.125 |
1.771 |
21/2 |
| 3 |
3.500 |
3.260 |
- |
- |
3.068 |
3.068 |
- |
2.900 |
2.900 |
- |
- |
- |
2.624 |
2.300 |
3 |
| 31/2 |
4.000 |
3.760 |
- |
- |
3.548 |
3.548 |
- |
3.364 |
3.364 |
- |
- |
- |
- |
2.728** |
31/2 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4 |
4.500 |
4.260 |
- |
- |
4.026 |
4.026 |
- |
3.826 |
3.826 |
- |
3.624 |
- |
3.438 |
3.152 |
4 |
| 5 |
5.563 |
5.295 |
- |
- |
5.047 |
5.047 |
- |
4.813 |
4.813 |
- |
4.563 |
- |
4.313 |
4.063 |
5 |
| 6 |
6.625 |
6.357 |
- |
- |
6.065 |
6.065 |
- |
5.761 |
5.761 |
- |
5.501 |
- |
5.187 |
4.897 |
6 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 8 |
8.625 |
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 |
8 |
| 10 |
10.750 |
10.420 |
10.250 |
10.136 |
10.020 |
10.020 |
9.750 |
9.750 |
9.562 |
9.312 |
9.062 |
8.750 |
8.500 |
8.750 |
10 |
| 12 |
12.750 |
12.390 |
12.250 |
12.090 |
12.000 |
11.938 |
11.626 |
11.750 |
11.374 |
11.062 |
10.750 |
10.500 |
10.126 |
10.750 |
12 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 14 |
14.000 |
13.500 |
13.376 |
13.250 |
13.250 |
13.124 |
12.812 |
13.000 |
12.500 |
12.124 |
11.812 |
11.500 |
11.188 |
- |
14 |
| 16 |
16.000 |
15.500 |
15.376 |
15.250 |
15.250 |
15.000 |
14.688 |
15.000 |
14.312 |
13.938 |
13.562 |
13.124 |
12.812 |
- |
16 |
| 18 |
18.000 |
17.500 |
17.376 |
17.124 |
17.250 |
16.876 |
16.500 |
17.000 |
16.124 |
15.688 |
15.250 |
14.876 |
14.438 |
- |
18 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 20 |
20.000 |
19.500 |
19.250 |
19.000 |
19.250 |
18.812 |
18.376 |
19.000 |
17.938 |
17.438 |
17.000 |
16.500 |
16.062 |
- |
20 |
| 22 |
22.000 |
21.500 |
- |
- |
21.250 |
- |
- |
21.000 |
- |
- |
- |
- |
- |
- |
22 |
| 24 |
24.000 |
23.500 |
23.250 |
22.876 |
23.250 |
22.624 |
22.062 |
23.000 |
21.562 |
20.938 |
20.376 |
19.876 |
19.312 |
- |
24 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 26 |
26.000 |
- |
- |
- |
25.250 |
- |
- |
25.000 |
- |
- |
- |
- |
- |
- |
26 |
| 30 |
30.000 |
29.376 |
29.000 |
28.750 |
29.250 |
- |
- |
29.000 |
- |
- |
- |
- |
- |
- |
30 |
| 36 |
36.000 |
35.376 |
35.000 |
34.750 |
35.250 |
34.500 |
- |
35.000 |
- |
- |
- |
- |
- |
- |
36 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 40 |
40.000 |
- |
- |
- |
39.250 |
- |
- |
39.000 |
- |
- |
- |
- |
- |
- |
40 |
| 42 |
42.000 |
- |
- |
- |
41.250 |
- |
- |
41.000 |
- |
- |
- |
- |
- |
- |
42 |
| 48 |
48.000 |
- |
- |
- |
47.250 |
- |
- |
47.000 |
- |
- |
- |
- |
- |
- |
48 |
Dimensions are in inches
** Source ANSI B360 10.
* Schedule 10 for sizes 14" and larger, Sizes 12" and smaller are Light Wall Thickness or Stainless Steel Schedule 10S.
• Inside pipe diameters are also provided by this table. Always specify bore when ordering.
|