Schwing SPB 28, Operation Manual

Page: 99 / 216

GENERAL RULE S
700+smgr.fm
PAGE 69
S AF ETY M AN U AL
17.10
Never open a pressurized pipeline (Figure 91). The pump oper-
ator must release the pressure before you open the line. If the line is pressurized
with compressed air, let the operator release the pressure and verify that the air
has escaped before you proceed. Even then use a shovel or other tool that will
assure a safe distance from clamps to avoid concrete blowing in your eyes.
17.11
After removing pipe sections you must reassemble using gas-
kets and clamps. Pipelines assembled without gaskets will leak cement and
water, which can cause a blockage.
17.12
Concrete is being moved through the delivery system by pres-
sure. Failure of a pipe, clamp, hose, or elbow is possible. For this reason, spend as
little time as possible standing under the boom, and wear protective clothing.
hosepop7.eps
Figure 90
Stay away from the point of discharge
when starting or restarting, and when
there’s air in the pipeline
WARNING
e x plode2col.eps
sme
x
plode.eps
NO!
Figure 91
Never open a pressurized pipeline
WARNING
WARNING