Dimensions for Class 900 Flanges

Nom. Pipe Size (inches)

O

Q*

R

X

No. and**
Dia of
Bolt
Holes

Bolt
Circle
Dia.

YY*

H

J

Y*

B

r

YV

BB

Z

C

T
1/2 4.75 0.88 1.38 1.50 4-0.88 3.25 2.38 0.84

To Be

S
p
e
c
i
f
i
e
d

by

P
u
r
c
a
s
e
r

 1.25 0.88 0.12 1.25 0.90 0.93 0.88
3/4 5.12 1.00 1.69 1.75 4-0.88 3.50 2.75 1.05 1.38 1.09 0.12 1.38 1.11 1.14 1.00
1 5.88 1.12 2.00 2.06 4-1.00 4.00 2.88 1.32 1.62 1.36 0.12 1.62 1.38 1.41 1.12
11/4 6.25 1.12 2.50 2.50 4-1.00 4.38 2.88 1.66 1.62 1.70 0.19 1.62 1.72 1.75 1.19
11/2 7.00 1.25 2.88 2.75 4-1.12 4.88 3.25 1.90 1.75 1.95 0.25 1.75 1.97 1.99 1.25
2 8.50 1.50 3.62 4.12 8-1.00 6.50 4.00 2.38 2.25 2.44 0.31 2.25 2.46 2.50 1.50
21/2 9.62 1.62 4.12 4.88 8-1.12 7.50 4.12 2.88 2.50 2.94 0.31 2.50 2.97 3.00 1.88
3 9.50 1.50 5.00 5.00 8-1.00 7.50 4.00 3.50 2.12 3.57 0.38 2.12 3.60 3.63 1.62
4 11.50 1.75 6.19 6.25 8-1.25 9.25 4.50 4.50 2.75 4.57 0.44 2.75 4.60 4.63 1.88
5 13.75 2.00 7.31 7.50 8-1.38 11.00 5.00 5.56 3.12 5.66 0.44 3.12 5.69 5.69 2.12
6 15.00 2.19 8.50 9.25 12-1.25 12.50 5.50 6.63 3.38 6.72 0.50 3.38 6.75 6.75 2.25
8 18.5 2.50 10.62 11.75 12-1.50 15.5 6.38 8.63 4.00 8.72 0.50 4.5 8.75 8.75 2.50
10 21.50 2.75 12.75 14.50 16-1.50 18.50 7.25 10.75 4.25 10.88 0.50 5.00 10.92 10.88 2.81
12 24.00 3.12 15.00 16.50 20-1.50 21.00 7.88 12.75 4.62 12.88 0.50 5.62 12.92 12.94 3.00
14 25.25 3.38 16.25 17.75 20-1.62 22.00 8.38 14.00 5.12 14.14 0.50 6.12 14.18 14.19 3.25
16 27.75 3.50 18.50 20.00 20-1.75 24.25 8.5 16.00 5.25 16.16 0.50 6.50 16.19 16.19 3.38
18 31.00 4.00 21.00 22.25 20-2.00 27.00 9.00 18.00 6.00 18.18 0.50 7.50 18.20 18.19 3.50
20 33.75 4.25 23.00 24.50 20-2.12 29.50 9.75 20.00 6.25 20.20 0.50 8.25 20.25 20.19 3.62
24 41.00 5.50 27.25 29.50 20-2.62 35.50 11.50 24.00 8.00 24.25 0.50 10.50 24.25 24.19 4.00