Maintenance Chart
50--001
Page 5 of 6
8 — 116
WK50_001_1301GB
11000200
Regularly turn delivery pipes and bends
The minimum wall thickness is shown in the graph below.
Caution
Pipes and bends must be replaced as soon as the wall thickness
has decreased to the value for the minimum wall thickness.
Putzmeister accepts no liability if the wall thickness falls below
the minimum wall thickness.
Danger
As a rule it is possible to continue pumping with a delivery pressure
lower than that shown in the graph.
We should, however, draw your attention to the fact that the delivery
line is subject to varying loads as a result of the dynamic load during
pumping. There is no general method for calculating the minimum
wall thickness for this load, which depends on the individual circum-
stances, and so the delivery line can also burst at a delivery pres-
sure which is assumed still to be permissible.
Furthermore, the delivery pressure can rise to 85 bar in the event
of blockages, meaning that the wall thickness will no longer be ade-
quate and the delivery line will burst.
