Siemens SITRANS L Series Compact Operating Instructions page 26

Installing/mounting
4.4 Installation instructions
Flange bolting: recommended torque
Pressure class
ASME B16.5, Class
150
EN1092-1, PN16 /
JIS B 2220, 10K
Flange bolting instructions:
1. Use cross-pattern sequence as shown.
2. Check uniformity of the flange gap.
3. Apply adjustments by selective tightening if required.
4. Torque incrementally until desired value is reached.
5. Check/re-torque after 4 to 6 hours.
26
Nominal pipe size
(NPS)
2"
3"
4"
6"
DN50/50A
DN80/80A
DN100/100A
DN150/150A
Compact Operating Instructions, 11/2019, A5E48453206-AA
Number of bolts
4
8
4
8
SITRANS LR250 with PROFIBUS PA
Recommended torque
(Nm)
30 – 50
50 – 70
40 – 60
70 – 90
30 – 50
60 – 80