Torque Values - Siemens SITRANS FM MAG 3100 Operating Instructions Manual

4.3.2

Torque values

Torque calculations
Overtightened bolts
Leakage/damage to flowmeter or piping may arise if bolts are overtightened.
All values are theoretical and are calculated on the assumption that:
• All bolts are new and material selection is according to EN 1515-1 table 2.
• Gasket material not exceeding 75 shore A is used between the flowmeter and mating flanges.
• All bolts are galvanized and adequately lubricated.
• Flanges are made of carbon steel.
• Flowmeter and mating flanges are correctly aligned.
Torque values
Note
Conversion to F/Lbs
To convert the torque values from Nm to F/Lbs multiply by 0.74.
Table 4-1 Minimum and maximum torques for EN 1092-1 PN 6 to PN 16 in Nm
Nominal
size
Liner PFA, PTFE,
Ebonite
mm inch Min Max
15 ½ - -
25 1 - -
32 1¼ - -
40 1½ - -
50 2 - -
65 2½ 3.9 4
80 3 6.9 7
100 4 10.3 11
125 5 6.4 7
150 6 8.1 9
SITRANS FM MAG 3100
Operating Instructions, 12/2021, A5E03005599-AE
CAUTION
PN 6
Soft rubber, PFA, PTFE,
EPDM, Linatex Ebonite
Min Max Min
- - -
- - -
- - -
- - -
- - -
3.2 4 -
5.7 6 -
8.7 9 -
5.5 6 -
7.2 8 -
EN 1092-1
PN 10
Soft rubber,
EPDM, Linatex
Max Min Max
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
Installing/Mounting
4.3 Mounting
PN 16
PFA, PTFE, Soft rubber,
Ebonite EPDM, Linatex
Min Max Min
- - -
- - -
- - -
- - -
- - -
8.5 9 6.9
10.8 11 8.8
13.8 14 11.6
19.2 20 16.5
29.8 31 26.1
Max
-
-
-
-
-
7
9
12
17
27
33