Spiral Wound Inner Ring Dimensions
Inner Ring Dimensions for ASME B16.20
NOTE 1 : There are no class 400 flanges in NPS 1/2” throug 3” (use class 600); nor class 900
NPS
Nominal Pipe Size |
Class
|
| 150 |
300 |
400 |
600 |
900 |
1500 |
2500 |
| 1/2" |
0.56 |
0.56 |
NOTE 1 |
0.56 |
NOTE 1 |
0.56 |
0.56 |
| 3/4" |
0.81 |
0.81 |
NOTE 1 |
0.81 |
NOTE 1 |
0.81 |
0.81 |
| 1" |
1.06 |
1.06 |
NOTE 1 |
1.06 |
NOTE 1 |
1.06 |
1.06 |
| 1-1/4" |
1.5 |
1.5 |
NOTE 1 |
1.5 |
NOTE 1 |
1.31 |
1.31 |
| 1-1/2" |
1.75 |
1.75 |
NOTE 1 |
1.75 |
NOTE 1 |
1.63 |
1.63 |
| 2" |
2.19 |
2.19 |
NOTE 1 |
2.19 |
NOTE 1 |
2.06 |
2.06 |
| 2-1/2" |
2.63 |
2.63 |
NOTE 1 |
2.63 |
NOTE 1 |
2.5 |
2.5 |
| 3" |
3.19 |
3.19 |
NOTE 1 |
3.19 |
NOTE 1 |
3.19 |
3.19 |
| 4" |
4.19 |
4.19 |
4.19 |
4.19 |
4.19 |
4.19 |
4.19 |
| 5" |
5.19 |
5.19 |
5.19 |
5.19 |
5.19 |
5.19 |
5.19 |
| 6" |
6.19 |
6.19 |
6.19 |
6.19 |
6.19 |
6.19 |
6.19 |
| 8" |
8.5 |
8.5 |
8.25 |
8.25 |
8.25 |
8.12 |
7.88 |
| 10" |
10.56 |
10.56 |
10.25 |
10.25 |
10.25 |
10.15 |
9.75 |
| 12" |
12.5 |
12.5 |
12.5 |
12.5 |
12.38 |
12.38 |
11.5 |
| 14" |
13.75 |
13.75 |
13.75 |
13.75 |
13.5 |
13.38 |
NOTE 1 |
| 16" |
15.75 |
15.75 |
15.75 |
15.75 |
15.5 |
15.25 |
NOTE 1 |
| 18" |
17.69 |
17.69 |
17.69 |
17.69 |
17.5 |
17.25 |
NOTE 1 |
| 20" |
19.69 |
19.69 |
19.69 |
19.69 |
19.5 |
19.25 |
NOTE 1 |
| 24" |
23.75 |
23.75 |
23.75 |
23.75 |
23.75 |
22.75 |
NOTE 1 |
Flanges in NPS 1/2” through 2-1/2” (use class 1500); nor class 2500 flanges NPS 14” and larger.
** The Inner Ring Thickness shall be .118 to .128 inch
|
