Tightening Torques For Bolts - Grundfos MAGNA1 25-40 Notice D'installation Et De Fonctionnement

16. Forces and moments
Maximum permissible forces and moments from the pipe connections acting on the pump flanges or threaded connections are indicated
in fig 35.
Fig. 35 Forces and moments from the pipe connections acting on the pump flanges or threaded connections
Diameter DN Fy
25* 350
32* 425
40 500
50 675
65 850
80 1025
100 1350
* The values also apply to pumps with threaded connection.
The above values apply to cast-iron versions. For stainless-steel versions, the values can be multiplied by two according to the
ISO 5199 standard.

17. Tightening torques for bolts

Recommended tightening torques for bolts used in flanged
connections:
Bolt dimension
M12
M16
26
Force
[N]
Fz Fx
425 375
525 450
625 550
825 750 1300
1050 925 1650
1250 1125 1975
1675 1500 2625
Torque
27 Nm
66 Nm
ΣFb
My
650 300
825 375
975 450
500
550
575
625
Moment
[Nm]
ΣMb
Mz Mx
350 450 650
425 550 800
525 650 950
575 700 1025
600 750 1100
650 800 1175
725 875 1300