6 Using the product
31
6.3.2.
Leak rate/usability after pressure drop
Leak rate measurement in acc. with DVGW-TRGI 2008
worksheet G 624.
The measurement of leaks is used for the serviceability test of an
existing gas pipe system. The pipe must be cleared of gas before
the test.
Low-pressure pipes in operation are differentiated according to the
degree of usability as follows:
1
Unlimited usability exists if the gas leakage rate is lower than 1
litre per hour at operating pressure.
2
Diminished usability exists if the gas leakage rate is between 1
and 5 litres per hour at operating pressure.
3
No usability exists if the gas leakage rate is higher than 5 litres
per hour at operating pressure.
According to the degree of usability, the following measures must
be carried out:
1
If there is unlimited usability, the pipes can still be used.
2
If there is diminished usability, the pipes must be sealed or
replaced. The tightness must be restored within 4 weeks of
determining the diminished usability.
3
If there is no usability, the pipes must be immediately put out of
operation. The specifications for newly routed pipes are valid for
repaired pipeline parts and their recommissioning.
Connecting the instrument
> Connect the instrument, see Connection variations, page 24.
Configure measurement procedure
1.
Use
or
in main menu to select
Measure
and confirm
selection with
.
2.
Select
LeakRate
with
or
and confirm selection with
.
3.
Set the gas type with
or
and confirm with
.
4.
Set the reference pressure with
or
and confirm with
.
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