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Daniel 3812 Liquid Ultrasonic Flow Meter Installation Manual Section 2: Mechanical installation
3-9000-765 Rev D March 2013
Piping recommendations 31
Meter tube dimensions with tube bundle or profiler plate for uni-directional and bi-directional
flow, the minimum straight pipe length is as follows:
• T
he bore of the mating piping should be within 1% of the meter inside diameter.
• The met
er is provided with dowel pins to align the meter body bore with the bore of the
mating piping.
• The
Daniel Liquid Ultrasonic Flow Meter should be mounted in horizontal piping with
the chord paths horizontal
• Norm
ally, the meter body is installed so that the electronics assembly is on the top of
the meter. If there is insufficient space above the piping for this arrangement, the meter
can be ordered with extra long transducer cables for remote mounting or the meter
housing can be installed with the electronics assembly on the bottom.
• T
he mating piping should include temperature and pressure measurement
connections located a minimum of two nominal pipe diameters length down stream of
the meter, or per API MPMS 5.8.
Table 2-2 Piping recommendation for uni-directional or bi-directional flow
UniDirectional Flow BiDirectional Flow
8D up stream
(with a flow conditioner)
8D up stream
(with a flow conditioner)
8D up stream
(no flow conditioner)
8D up stream
(no flow conditioner)
5D in front of flow conditioners if used 5D in front of flow conditioners if used
FAULTY METER INSTALLATION
Correctly install the meter.
If meter bodies are mounted or oriented differently than specified above, debris may collect in
the transducer ports which could adversely affect the transducer signals, or cause equipment
damage.