Flange dimensions by size
Choose a size and class for full flange dimensions, bolting and a comparison with the other class. Or open the complete Class 150 and Class 300 tables.
Class 150 flanges
1/2"
Class 150
3/4"
Class 150
1"
Class 150
1-1/4"
Class 150
1-1/2"
Class 150
2"
Class 150
2-1/2"
Class 150
3"
Class 150
3-1/2"
Class 150
4"
Class 150
5"
Class 150
6"
Class 150
8"
Class 150
10"
Class 150
12"
Class 150
14"
Class 150
16"
Class 150
18"
Class 150
20"
Class 150
24"
Class 150
Class 300 flanges
1/2"
Class 300
3/4"
Class 300
1"
Class 300
1-1/4"
Class 300
1-1/2"
Class 300
2"
Class 300
2-1/2"
Class 300
3"
Class 300
3-1/2"
Class 300
4"
Class 300
5"
Class 300
6"
Class 300
8"
Class 300
10"
Class 300
12"
Class 300
14"
Class 300
16"
Class 300
18"
Class 300
20"
Class 300
24"
Class 300
Last updated 2026-11-02