TM 1-1500-204-23-2
TIGHTENING - RULE OF THUMB
TORQUE
(FLAT TURNS AFTER PRETIGHTENING)
TUBING
SIZE
(INCH POUNDS)
NORMAL TIGHT
EXTRA TIGHT
ALUMINUM
-3
65 TO 95
OR STEEL
-4
100 TO 150
1 TO 1 1/2
2 MAXIMUM
-6
175 TO 300
1 TO 1 1/2
2 MAXIMUM
-8
325 TO 500
1 TO 1 1/2
2 MAXIMUM
-10
400 TO 700
1 TO 1 1/2
2 MAXIMUM
-12
500 TO 800
1 TO 1 1/2
2 MAXIMUM
-16
500 TO 800
1 TO 1 1/2
2 MAXIMUM
ALUMINUM
-20
600 TO 900
1 TO 1 1/2
2 MAXIMUM
-24
600 TO 900
5/6 TO 1
1 1/2 MAXIMUM
Figure 4-21. MS Turns and Torque Values
Figure 4-22. Tubing-To-Tubing Connections
Figure 4-23. Marking MS Fitting
4-18
