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5.4 Piping
5.4.1 Connecting the piping
DANG E R
Impermissible loads acting on the pump nozzles
Danger to life from leakage of hot, toxic, corrosive or flammable fluids!
Do not use the pump as an anchorage point for the piping.
Anchor the pipelines in close proximity to the pump and connect them without
transmitting any stresses or strains.
Observe the permissible forces and moments at the pump nozzles. ( Section
5.4.2 Page 23)
Take appropriate measures to compensate thermal expansion of the piping.
C AUTION
Incorrect earthing during welding work at the piping
Destruction of rolling element bearings (pitting effect)!
Never earth the electric welding equipment on the pump or baseplate.
Prevent current flowing through the rolling element bearings.
NOTE
It is recommended to install check and shut-off elements in the system, depending on the
type of plant. However, such elements must not obstruct proper drainage or hinder
disassembly of the unit.
The suction lift line/suction head line has been laid with a rising/downward slope towards
the pump.
The nominal diameters of the pipelines are at least equal to the nominal diameters of the
pump nozzles.
To prevent excessive pressure losses, adapters to larger diameters have a diffuser angle of
approximately 8 °.
The pipelines have been anchored in close proximity to the pump and connected without
transmitting any stresses or strains.
1. Thoroughly clean, flush and blow through all vessels, pipelines and connections (especially
of new installations).
2. Before installing the pump in the piping, remove the flange covers on the suction and
discharge nozzles of the pump.
C AUTION
Welding beads, scale and other impurities in the piping
Damage to the pump!
Free the piping from any impurities.
If necessary, install a filter.
Observe the instructions in (
Section 7.2.2.3 Page 43).
3. If required, install a filter in the piping (see drawing: Filter in the piping).
5 Installation at Site
