Graph Key:
(1) Suitable for gas and liquid
(2) Suitable for liquid only
(3) Refer to Thermoseal’s technical support service
Size selection/torques required to seal ANSI 150lb flanges
Nominal
Flange
Size (in)
Number
Bolts
(N)
Bolt
Size
(in)
*Approx.
Sealex
Length (in)
Suggested
Sealex Size
(in)
Sealing
Stress
(lbs/in)
Torque
(lb/ft)
1/2
4
0.5
4.3
3/16
1570
30
3/4
4
0.5
5.2
3/16
1570
30
1
4
0.5
6.2
3/16
1570
30
1-1/4
4
0.5
7.4
3/16
1570
30
1-1/2
4
0.5
8.3
1/4
2140
30
2
4
0.625 10.2
1/4
2140
60
2-1/2
4
0.625 12.2
1/4
2140
60
3
4
0.625 13.9
1/4
2140
60
4
8
0.625 17.9
3/8
2620
60
5
8
0.75 20.9
3/8
2760
100
6
8
0.75 24.1
3/8
2625
100
8
8
0.75 30.9
3/8
2625
100
10
12
0.875 37.9
3/8
2750
160
12
12
0.875 45.4
1/2
3000
160
* Based on mean sealing diameter
For Additional Information Call Toll Free 1.800.990.7325 or email
.
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