17
3 Operation
3.1.5
Preliminary test
CAUTION!
Preliminary test may only be carried out by suffi
-
ciently qualified members of staff who are familiar
with the prevailing national regulations (in Germany,
for example: TRGI). All relevant safety procedures
and accident prevention regulations have to be
taken into account.
Preliminary test are used to test the endurance of the relevant
material. Newly installed pipes are checked without fittings.
Note:
Fittings whose nominal pressure stage is at least
equal to the testing pressure, may be subjected to
Preliminary test.
Depending on the relevant country, there may be different national
regulations with respect to Preliminary test. According to TRGI,
the following requirements have to be met:
z
The minimum test duration is 10 minutes.
z
During the test, the pressure must not decrease.
Note:
The minimum test duration is sufficient for standard
housing constructions. For installations/construc
-
tions with a larger volume, the test time may be
correspondingly longer.
