ACE BOILER INC.
Page 8
Torque’s:
The following are recommended bolt torque requirements
Bolt Size
Min Torque Max Torque
1/2" 45
ft
-
lb
f. 6
0 ft
-lbf.
5/8" 90
ft
-lbf. 1
20 ft
-lbf.
3/4" 150
ft
-lbf. 2
00 ft
-lbf.
7/8" 240
ft
-lbf. 3
20 ft
-lbf.
1" 368
ft
-lbf. 4
90 ft
-lbf.
1 1/8"
533 ft
-lbf. 7
10 ft
-lbf.
1 1/4"
750 ft
-lbf. 1
000 ft
-lbf.
1 1/2"
1200 ft
-lbf. 1
600 ft
-lbf.
Notes:
* Spray each stud bolt and nut generously with penetrating oil before re-torque.
** Gasket thickness before compression. All partition gaskets are in width before compression. All gaskets
expand twice their width after compression.
*** These are recommended torque values. Stud bolts must not be stressed above 60% of their yield strength.
Stud bolt torque (T) & Bolt diameter (Y)
Gap between flanges
approx. (X) after torque
Figure 1.2
Shell flange to bonnet flange joint –
DW Tube Bundle
360º
Leak
detection
area
Figure 1.1
Shell flange to bonnet flange joint –
SW Tube Bundle
Summary of Contents for Packaged Storage Water Heater Steam-to-Water System
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