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3. Forces and moments
Maximum permissible forces and moments from the pipe connec-
tions acting on the pump flanges are indicated in fig 7.
Fig. 7
Forces and moments from the pipe connections acting on the pump flanges
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.
4. Tightening torques for bolts
Recommended tightening torques for bolts used in flanged con-
nections:
Bolt dimension
M12
M16
40
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
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