INTRODUCTION
Torque values for O-Ring Face Seals (ORFS) connections
SAE
dash
size
UN/UNF
thread size
Inch tube
OD (mm)
Metric
tube
OD (mm)
Hex size
(mm)
(Reference
only)
*
Swivel nut
torque
N·m (lb ft)
± 10%
**
Swivel nut
torque
N·m (lb ft)
± 10%
4
9/16-18
6.35
6
17
27 (19.9)
27 (19.9)
5
5/8-18
7.94
8
19
34 (25.1)
34 (25.1)
6
11/16-16
9.52
10
22
44 (32.5)
44 (32.5)
8
13/16-16
12.7
12
24
65 (47.9)
65 (47.9)
10
1-14
15.88
16
30
100 (73.8)
100 (73.8)
12
1-3/16-12
19.05
20
36
150 (110.6)
131 (96.6)
14
1-5/16-12
22.23
22
41
163 (120.2)
131 (96.6)
16
1-7/16-12
25.4
25
41
210 (154.9) ***
131 (96.9)
20
1-11/16-12
31.75
30
50
280 (206.5) ***
178 (131.3)
24
2-12
38.1
38
60
375 (276.6) ***
210 (154.9)
* High/Medium-pressure applications >
50 bar
(
725 psi
).
** Low-pressure applications <
50 bar
(
725 psi
).
*** It is recommended to use a four-bolt flange connection instead of O-Ring Face Seals (ORFS) sizes "16" and up.
Torque values for 37° flare connections - Joint Industry Council (JIC)
SAE
dash
size
UN/UNF
thread size
Metric
tube
OD (mm)
Inch tube
OD (mm)
Swivel nut torque
N·m (lb ft) ± 10%
2
5/16-24
–
3.18
8.25 (6.1)
3
3/8-24
–
4.76
11.5 (8.5)
4
7/16-20
6
6.35
15.5 (11.4)
5
1/2-20
8
7.94
20 (14.8)
6
9/16-18
10
9.52
25 (18.4)
8
3/4-16
12
12.7
52 (38.4)
10
7/8-14
16
15.88
81 (59.7)
12
1-1/16-12
20
19.05
112 (82.6)
14
1-3/16-12
–
22.22
133 (98.1)
16
1-5/16-12
25
25.4
155 (114.3)
20
1-5/8-12
30/32
31.75
180 (132.8)
24
1-7/8-12
38
38.1
225 (166)
32
2-1/2-12
50
50.8
348 (256.7)
Torque values for 30° flare, 60° cone connections
Nominal
size (mm)
British Standard Pipe
Parallel (BSPP)
thread size
Hex size (mm)
Swivel nut torque
N·m (lb ft) ± 10%
5, 6, 6.3
G 1/4
17
25 (18.4)
8, 9, 10
G 3/8
19
34 (25.1)
12, 12.5
G 1/2
22
64 (47.2)
15, 16, 19
G 3/4
30
132 (97.4)
25
G 1
36
196 (144.6)
31.5, 32
G 1-1/4
46
225 (166)
38
G 1-1/2
50
255 (188.1)
50, 51
G 2
65
316 (223.1)
51430129 15/12/2017
25
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