Appendix
Proline Promag
36
Hauser
Screw tightening torques for ASME B16.5; Class 150, 300
Nominal diameter
Pressure rating
Screws
Max. screw tightening torque [Nm]
([lbf · ft])
[mm]
[in]
[psi]
[in]
PTFE
PFA
15
½
Class 150
4 × ½
6 (4)
– (–)
15
½
Class 300
4 × ½
6 (4)
– (–)
25
1
Class 150
4 × ½
11 (8)
10 (7)
25
1
Class 300
4 × 5/8
14 (10)
12 (9)
40
1 ½
Class 150
4 × ½
24 (18)
21 (15)
40
1 ½
Class 300
4 × ¾
34 (25)
31 (23)
50
2
Class 150
4 × 5/8
47 (35)
44 (32)
50
2
Class 300
8 × 5/8
23 (17)
22 (16)
80
3
Class 150
4 × 5/8
79 (58)
67 (49)
80
3
Class 300
8 × ¾
47 (35)
42 (31)
100
4
Class 150
8 × 5/8
56 (41)
50 (37)
100
4
Class 300
8 × ¾
67 (49)
59 (44)
150
6
Class 150
8 × ¾
106 (78)
86 (63)
150
6
Class 300
12 × ¾
73 (54)
67 (49)
200
8
Class 150
8 × ¾
143 (105)
109 (80)
250
10
Class 150
12 × 7/8
135 (100)
– (–)
300
12
Class 150
12 × 7/8
178 (131)
– (–)
350
14
Class 150
12 × 1
260 (192)
– (–)
400
16
Class 150
16 × 1
246 (181)
– (–)
450
18
Class 150
16 × 1 1/8
371 (274)
– (–)
500
20
Class 150
20 × 1 1/8
341 (252)
– (–)
600
24
Class 150
20 × 1 ¼
477 (352)
– (–)
Screw tightening torques for JIS B2220; 10, 20K
Nominal diameter
Pressure rating
Screws
Max. screw tightening torque [Nm]
[mm]
[bar]
[mm]
PTFE
PFA
25
10K
4 × M16
32
27
25
20K
4 × M16
32
27
32
10K
4 × M16
38
–
32
20K
4 × M16
38
–
