2 Installation and Commissioning
Manual TRZ 03· EN08 ·2018 September, 10th
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In order to obtain precise measlurement results, the turbine meter must be in-
stalled in the gas line in such a way that no seals protrude from the flanges into
the pipeline.
Notice
A protective screen should be installed on the intake side of the gas meter
to protect the turbine meter against any foreign particles possibly
contained in the gas flow. The protective screen can be a perforated plate
of sheet metal with a hole diameter of 3 mm which is available from RMG.
•
The pm tap which is located on the RMG turbine meter is the pressure-
measuring point which was used for taking the relevant pressure at meas-
urement conditions during meter proving. This pressure-measuring point is
used for connecting pressuremeasuring instruments such as flow comput-
ers or volume correctors. Other connection options (e.g. for temperature
measurement) can be supplied on a pipe section on the output side of the
gas meter.
Danger
Protect the turbine meter from damage caused by heavy flow variations,
e.g. if the downstream pipeline system must be filled or blown off.
If it is necessary to do welding work on the gas line, such work can only be
performed at a safe distance from the gas meter. Extreme temperatures
prevailing in the gas line in the proximity of the gas meter can result in a
permanent damage to the gas meter.
All electrical connections between the gas meter and the amplifiers or the
flow computer must be carried out in compliance with the installation in-
structions. Make sure that these connections are intrinsically safe.
Any liquids remaining in the gas line after hydrostatic testing can damage
the interior parts of the gas meter. If hydrostatic testing is necessary, the
turbine meter must be replaced by a pipe section. Make sure that no liquid
remains in the gas line upstream of the gas meter after hydrostatic testing.