353
Appendix
Appendix
Installation & Maintenance
Assemblies
Equipment & Accessories
Fittings
Hoses
Torque Values
Dash
Size
Nominal
Thread Size
With O–Ring Without O-Ring
in.
ft./lbs. N/m ft./lbs. N/m
BSPP
*"
G" denotes
parallel
threads
-2
G 1/8-28
NA
NA
7
10
-4
G 1/4-19
15
20
15 20
-6
G 3/8-19
26
35
26 35
-8
G 1/2-14
37
50
44 60
-10
G 5/8-14
44
60
52 70
-12
G 3/4-14
63
85
85 115
-16
G 1-11
85
115 103 140
-20
G 1 1/4-11 140 190 155 210
-24
G 1 1/2-11 177 240 214 290
-32
G 2-11
221 300 295 400
Dash Size
mm
ft./lbs.
N/m
Maximum
Recommended
Torque for Dry
NPTF (Tapered)
Pipe Threads
-2
20
25
-4
25
35
-6
35
45
-8
45
60
-12
55
75
-16
65
90
-20
80
110
-24
95
130
-32
120
160
**
Notes:
1.
The torque values obtained from tightening pipe threads can vary considerably depending
on thread condition. Adequate sealing can occur at values much lower than the maximum
values listed above. Only enough torque to achieve adequate sealing should be used.
2.
When using a male tapered pipe thread with a female straight or parallel pipe thread,
maximum values are 50% of those listed in the table.
3.
If thread sealant is used, maximum values shown should bedecreased by 25%.