Bolt Dia. (D) in. - threads/
inch
Tensile Stress Area
(Ab), (sq-in)
Max preload (lbs)
Torque (ft-lb) Nickel or
Moly Anti-seize, K=0.15
1.25-7
0.9691
24421
382
1.25-8
1.000
25200
394
1.375-6
1.155
29106
500
1.375-8
1.234
31097
534
1.5-6
1.405
35406
664
1.5-8
1.492
37598
705
1.5-12
1.581
39841
747
1.625-8
1.775
44730
909
1.75-5
1.899
47855
1047
1.75-8
2.082
52466
1148
1.875-8
2.414
60833
1426
2-4.5
2.498
62950
1574
2-8
2.771
69829
1746
2.125-8
3.152
79430
2110
2.25-4.5
3.248
81850
2302
2.25-8
3.557
89636
2521
2.375-8
3.987
100472
2983
2.5-4
3.999
100775
3149
2.5-8
4.442
111938
3498
2.625-8
4.921
124009
4069
2.75-4
4.934
124337
4274
2.75-8
5.425
136710
4699
2.875-8
5.953
150016
5391
3-4
5.967
150368
5639
3-8
6.506
163951
6148
NOTICE:
1.
Yield strength = 36000 psi
2.
Tensile strength (min) = 60000 psi
3.
Prestress = 0.7*yield strength = 25.2ksi
4.
Max preload = prestress * tensile stress area
5.
The preload and torque given in this table may need to be adjusted to account for spe-
cial conditions, such as gaskets
6.6.10.4 Spare parts
Critical services spare parts
For critical services, the following parts should be stocked, where applicable:
•
Venturi Insert (100W) (Applicable for venturi style casings)
•
Impeller (101) with impeller rings (202 and 203)
•
Thrust bearing end-cover (109A)
•
Radial bearing end cover (119A)
•
Shaft (122)
•
Radial bearing isolator (123)
6.6 Reassembly
Model 3700i API610 / Type OH2 Installation, Operation, and Maintenance Manual
113