Mount In Free-Stream Application (Weldolet Fitting) - Emerson Micro Motion Installation Manual

Mounting
Figure 2-1:
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
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10
Free-stream (flanged fitting) meter installation
Free-stream (weldolet) installations are recommended for processes with the
following conditions:
Flow
Viscosity
Temperature
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.
Plan view of a vertical pipe installation
A
B
0.3 to 0.5 m/s (at the meter)
0.5 to 12,500 cP
–50 °C to 200 °C (–58 °F to 392 °F)
–40 °C to 200 °C (–40 °F to 392 °F) in
hazardous areas
Micro Motion Fork Viscosity Meter