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52 Meter body installation
Section 3: Installation Reference, Installation, and Operations Manual
June 2013 3-9000-743 Rev S
For bi-directional flow, the minimum straight pipe length is as follows:
• The bore of the mating piping should be within 1% in order to comply with AGA9.
• The meter is provided with dowel pins to align the meter body bore with the bore of the
mating piping.
• The SeniorSonic
TM
meter must be mounted in horizontal piping with the chord paths
horizontal. The JuniorSonic
TM
meter body should be oriented so that the chord paths are
oriented 45
o
off vertical.
• Normally, 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 (JuniorSonic
TM
and
SeniorSonic
TM
meters) or the meter housing can be installed with the electronics
assembly on the bottom (SeniorSonic
TM
meters only).
• Two pressure taps are provided on the meter for pressure measurement.
• The mating piping should include temperature measurement connections located a
minimum of two nominal pipe diameters length down stream of the meter.
• If the meter body is not fitted with a means to vent line pressure, the down stream piping
section should be provided with a vent valve to allow line pressure to be vented for
maintenance.
Table 3-5 Piping recommendations bi-directional flow
SeniorSonic JuniorSonic
15D (each direction) (with a flow conditioner) 20D (each direction)
20D (each direction) (no flow conditioner)
EQUIPMENT HANDLING
Observe all precautionary signs posted on the equipment.
Failure to do so may result in injury to personnel or cause damage to the equipment.