Vetter Pipe and Test Sealing Bags - Manual (Page 6)

Vetter Pipe and Test Sealing Bags
Page 6/33
2.2 Information about the dangers
Changes and modifications to the sealing bags, inflation fittings
and inflation hoses are not permitted. Operation of Vetter pipe
bags, test bags and bypass bags are only permitted with original
Vetter inflation fittings and inflation hoses. Parts made by another
manufacturer can influence safety.
Pipe and test sealing bags are made of a strong expanding mate-
rial. If this material is expanded beyond its permitted maximum
range then this can cause bursting. No person is allowed to re-
main within the working area during the pressure test. With a
water pressure test, the pipeline being tested must not have any
direct connection to a high-pressure line (e.g. hydrant).
After positioning the pipe and/or the test sealing bag it is to be
ensured that nobody remain in the channel or in front of the pipe
during inflation, as well as during the test procedure and empty-
ing sequence. Before removing the set-up make certain that the
pipeline is not under any pressure and is completely empty.
2.3 Warnings
The pipe and test sealing bags as well as the accessories must be
checked for perfect condition before and after each operation.
Outside the pipeline, Vetter pipe and test sealing bags, 0.5 bar and
1 bar, must only be filled to maximum 0.2 bar for the visual test.
1.5 bar and 2.5 bar bags must only be filled to a maximum of 0.5
bar.
All controllers are fitted with a safety valve that has a permitted
maximum operating pressure corresponding to the pipe and test
sealing bag. If the maximum operating pressure of 0.5, 1.5, 2.5 or
6 bar is exceeded then the safety valve will activate. The tolerance
for opening and closing of the safety valve is only permitted to be
a maximum of + 10 %. The set pressure must not be changed. If
the sealing on the top part of the valve is removed then its ope-
ration is no longer guaranteed and the safety valve must be ex-
changed. The permitted inlet pressure on the controller (marking
on the inlet coupling) must not be exceeded.