Figure 6-32.Typical installation of a centrifugal pump.
checked again for parallel and angular alignment. You
Remove burrs and sharp edges when marking up
are now ready to connect the piping.
Do not spring piping when marking
Provide for pipe expansion when hot fluids are to
When installing the pump piping, be sure to
observe the following precautions:
Piping should always be run to the pump.
Do not move the pump to the pipe. This could
make final alignment impossible.
Both the suction and discharge piping should be
independently supported near the pump and
properly aligned, so the strain is not transmitted
to the pump when the flange bolts are tightened.
Use pipe hangers or other supports at necessary
intervals to provide support. When expansion
joints are used in the piping system, they must be
installed beyond the piping supports closest to
Tie bolts should be used with expansion joints to
prevent pipe strain. Do not install expansion
joints next to the pump or in any way that would
cause a strain on the pump, resulting from
system pressure changes.
It is usually advisable to increase the size of both
the suction and the discharge pipes at the pump
connections to decrease the loss of head from
Install piping as straight as possible, avoiding
unnecessary bends. Where necessary, use 45-
degree or long sweep 90-degree fittings to
decrease friction losses.
Make sure that all piping joints are airtight.
Where flange joints are used, you must ensure
that their inside diameters match properly.
SUCTION PIPING.When installing the
suction piping, observe the precautions shown in
figure 6-33. The sizing and installation of the suction
Figure 6-33.Suction pipe installations.