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Free-stream (flanged fitting) meter installationFigure 2-1:
B
A
STATUS
SCROLL SELECT
Plan view of a vertical pipe installation
A. 4-inch pipe for horizontal installations; 6-inch (152 mm) pipe for vertical installations
B. Size the recess mount so that the meter tines are inserted fully into the liquid [approximately 2.75 in
(70 mm)].
2.2 Mount in free-stream application (weldolet
fitting)
The weldolet for free-stream installations has a 1.5-inch taper lock fitting and is supplied to
be welded on 4-inch, 6-inch, 8-inch or 10-inch pipelines. A weldolet installation ensures
that the tines of the meter are oriented correctly and are fully inserted into the fluid
stream.
Prerequisites
• Free-stream (weldolet) installations are recommended for processes with the
following conditions:
Flow 0.3 to 0.5 m/s (at the meter)
Viscosity 0.5 to 12,500 cP
Temperature –50 °C to 200 °C (–58 °F to 392 °F)
–40 °C to 200 °C (–40 °F to 392 °F) in
hazardous areas
Note
If temperature variations are a critical factor in your process, the reduced thermal mass of the
taper-lock fitting of the weldolet can track changes in temperature more efficiently.
• Before fitting the weldolet, you must bore a 2.1 in (52.5 mm) diameter opening in
the pipeline to accept the meter. You must weld the weldolet to the pipeline
concentrically with the pre-bored hole.
Mounting
12 Micro Motion Fork Viscosity Meter