Bolt Dia. (D) in.
-
threads/inch
Tensile Stress
Area (Ab), (sq-in)
2239 (A193 B7)
¼-2 ½ dia: Sult = 125 ksi, Sy=105 ksi
over 2 ½ – 4: Sult = 115 ksi, Sy=95 ksi
over 4 – 7: Sult = 100 ksi, Sy=75 ksi
2299 (A320 L7)
¼-2 ½ dia:
Sult = 125 ksi, Sy=105
ksi
Max preload
(lbs)
Torque (ft-lb)
Nickel or
Moly Anti-seize
K=0.15
Torque (ft-lb)
Nickel or
Moly Anti-seize
K=0.15
3/4-10
0.3345
24586
230
230
7/8-9
0.4617
33935
371
371
1-8
0.6058
44526
557
557
1.125-7
0.7633
56103
789
789
1.125-8
0.79045
58098
817
817
1.25-7
0.9691
71229
1113
1113
1.25-8
1
73500
1148
1148
1.375-6
1.155
84893
1459
1459
1.375-8
1.234
90699
1559
1559
1.5-6
1.405
103268
1936
1936
1.5-8
1.492
109662
2056
2056
1.5-12
1.581
116204
2179
2179
1.625-8
1.775
130463
2650
2650
1.75-5
1.899
139577
3053
3053
1.75-8
2.082
153027
3347
3347
1.875-8
2.414
177429
4158
4158
2-4.5
2.498
183603
4590
4590
2-8
2.771
203669
5092
5092
2.125-8
3.152
231672
6154
6154
2.25-4.5
3.248
238728
6714
6714
2.25-8
3.557
261440
7353
7353
2.375-8
3.987
293045
8700
8700
2.5-4
3.999
293927
9185
9185
2.5-8
4.442
326487
10203
10203
2.625-8
4.921
327247
10738
Not Applicable due to
size restrictions in the
material specification
2.75-4
4.934
328111
11279
2.75-8
5.425
360763
12401
2.875-8
5.953
395875
14227
3-4
5.967
396806
14880
3-8
6.506
432649
16224
NOTICE:
1.
Prestress = 0.7*yield strength
2.
Max preload = prestress* tensile stress area
3.
The preload and torque given in this table may need to be adjusted to account for spe-
cial conditions, such as gaskets.
6.6 Reassembly
110
Model 3700i API610 / Type OH2 Installation, Operation, and Maintenance Manual