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Class 150


NOMINAL
SIZE		 COMMON DIMENSIONS
OUTSIDE DIA.
O. 		THK.
C		 RAISED FACE DIA.
R 		FILLET RADIUS
r
1/2 3 1/2 7/16 1 3/8 1/8
3/4 3 7/8 1/2 1 11/16 1/8
1 4 1/4 9/16 2 1/8
1 1/4 4 5/8 5/8 2 1/2 3/16
1 1/2 5 11/16 2 7/8 1/4
2 6 3/4 3 5/8 5/16
2 1/2 7 7/8 4 1/8 5/16
3 7 1/2 15/16 5 3/8
3 1/2 8 1/2 15/16 5 1/2 3/8
4 9 15/16 6 3/16 7/16
5 10 15/16 7 5/16 7/16
6 11 1 8 1/2 1/2
8 13 1/2 1 1/8 10 5/8 1/2
10 16 1 3/16 12 3/4 1/2
12 19 1 1/4 15 1/2
14 21 1 3/8 16 1/4 1/2
16 23 1/2 1 7/16 18 1/2 1/2
18 25 1 9/16 21 1/2
20 27 1/2 1 11/16 23 1/2
22 29 1/2 1 13/16 25 1/4 1/2
24 32 1 7/8 27 1/4 1/2

NOMINAL
SIZE		 BORE LENGTH THROUGH HUB
Welding
Neck
Socket
B1		 Slip-on

B2		 Lap
Joint
B3		 Welding
Neck
Y1		 Slip-on
Socket
Y2		 Lap
Joint
Y3
1/2 T
O

B
E

S
P
E
C
I
F
I
E
D

B
Y

P
U
R
C
H
A
S
E
R 		0.88 0.90 1 7/8 5/8 5/8
3/4 1.09 1.11 2 1/16 5/8 5/8
1 1.36 1.38 2 3/16 11/16 11/16
1 1/4 1.70 1.72 2 1/4 13/16 13/16
1 1/2 1.95 1.97 2 7/16 7/8 7/8
2 2.44 2.46 2 1/2 1 1
2 1/2 2.94 2.97 2 3/4 1 1/8 1 1/8
3 3.57 3.60 2 3/4 1 3/16 1 3/16
3 1/2 4.07 4.10 2 13/16 1 1/4 1 1/4
4 4.57 4.60 3 1 5/16 1 5/16
5 5.66 5.69 3 1/2 1 7/16 1 7/16
6 6.72 6.75 3 1/2 1 9/16 1 9/16
8 8.72 8.75 4 1 3/4 1 3/4
10 10.88 10.92 4 1 15/16 1 15/16
12 12.88 12.92 4 1/2 2 3/16 2 3/16
14 14.14 14.18 5 2 1/4 2 1/8
16 16.16 16.19 5 2 1/2 3 7/16
18 18.18 18.20 5 1/2 2 11/16 3 13/16
20 20.20 20.25 5 11/16 2 7/8 4 1/16
22 22.22 22.25 5 7/8 3 1/8 4 1/4
24 24.25 24.25 6 3 1/4 4 3/8

FLANGES
CLASS 150, ASME B16.5



Min. Thread
Length
T 		Depth of Socket

D		 Dia.
Hub at
Bevel
A		 Hub
Dia.

X		 DRILLING -
Bolt Circle Dia. Holes Nominal Size
-
0.62 3/8 0.84 1 3/16 2 3/8 5/8 1/2
0.62 7/16 1.05 1 1/2 2 3/4 5/8 3/4
0.69 1/2 1.32 1 15/16 3 1/8 5/8 1
0.81 9/16 1.66 2 5/16 3 1/2 5/8 1 1/4
0.88 5/8 1.90 2 9/16 3 7/8 5/8 1 1/2
1.00 11/16 2.38 3 1/16 4 3/4 3/4 2
1.12 3/4 2.88 3 9/16 5 1/2 3/4 2 1/2
1.19 13/16 3.50 4 1/4 6 3/4 3
1.25 7/8 4.00 4 13/16 7 3/4 3 1/2
1.31 15/16 4.50 5 5/16 7 1/2 3/4 4
1.44 15/16 5.56 6 7/16 8 1/2 7/8 5
1.56 1 1/16 6.63 7 9/16 9 1/2 7/8 6
1.75 1 1/4 8.63 9 11/16 11 3/4 7/8 8
1.94 1 5/16 10.75 12 14 1/4 1 10
2.19 1 9/16 12.75 14 3/8 17 1 12
2.25 1 5/8 14.00 15 3/4 18 3/4 1 1/8 14
2.50 1 3/4 16.00 18 21 1/4 1 1/8 16
2.69 1 15/16 18.00 19 7/8 22 3/4 1 1/4 18
2.88 2 1/8 20.00 22 25 1 1/4 20
- 2 3/8 22.00 24 1/4 27 1/4 1 3/8 22
3.25 2 1/2 24.00 26 1/8 29 1/2 1 3/8 24































 

 

N¡ã of Bolts Dia. of Bolts (inches) LENGTH OF BOLTS Nominal Size
STUD BOLTS Hex Bolts .06" Raised Face
.06" Raised Face Ring Joint
4 1/2 2.25 - 2.00 1/2
4 1/2 2.50 - 2.00 3/4
4 1/2 2.50 3.00 2.25 1
4 1/2 2.75 3.25 2.25 1 1/4
4 1/2 2.75 3.25 2.50 1 1/2
4 5/8 3.25 3.75 2.75 2
4 5/8 3.50 4.00 3.00 2 1/2
4 5/8 3.50 4.00 3.00 3
8 5/8 3.50 4.00 3.00 3 1/2
8 5/8 3.50 4.00 3.00 4
8 3/4 3.75 4.25 3.25 5
8 3/4 4.00 4.50 3.25 6
8 3/4 4.25 4.75 3.50 8
12 7/8 4.50 5.00 4.00 10
12 7/8 4.75 5.25 4.00 12
12 1 5.25 5.75 4.50 14
16 1 5.25 5.75 4.50 16
16 1 1/8 5.75 6.25 5.00 18
20 1 1/8 6.25 6.75 5.50 20
20 1 1/8 6.50 - 5.50 22
20 1 1/4 6.75 7.25 6.00 24