Class 150
Nom.
Pipe
Size
Flange
Dia.
(0)
Flange
Thick
(Q)
Raised
Face Dia.
(RF)
No.
of
Holes
Dia.
of
Bolts
Dia. Of
Bolt Circle
(BC)
1/2 3-1/2 7/16 1-3/8 4 1/2 2-3/8
3/4 3-7/8 1/2 1-11/16 4 1/2 2-3/4
1 4-1/4 9/16 2 4 1/2 3-1/8
1-1/4 4-5/8 5/8 2-1/2 4 1/2 3-1/2
1-1/2 5 11/16 2-7/8 4 1/2 3-7/8
2 6 3/4 3-5/8 4 5/8 4-3/4
2-1/2 7 7/8 4-1/8 4 5/8 5-1/2
3 7-1/2 15/16 5 4 5/8 6
3-1/2 8-1/2 15/16 5-1/2 8 5/8 7
4 9 15/16 6-3/16 8 5/8 7-1/2
5 10 15/16 7-5/16 8 3/4 8-1/2
6 11 1 8-1/2 8 3/4 9-1/2
8 13-1/2 1-1/8 10-5/8 8 3/4 11-3/4
10 16 1-3/16 12-3/4 12 7/8 14-1/4
12 19 1-1/4 15 12 7/8 17
14 21 1-3/8 16-1/4 12 1 18-3/4
16 23-1/2 1-7/16 18-1/2 16 1 21-1/4
18 25 1-9/16 21 16 1-1/8 22-3/4
20 27-1/2 1-11/16 23 20 1-1/8 25
24 32 1-7/8 27-1/4 20 1-1/4 29-1/2