Figure 3-5: Free-stream (weldolet fitting) meter installation
A. 4 in (102 mm) pipe for horizontal installations; 6 in (152 mm) pipe for vertical
installations
B. 2.1 in (53 mm) meter opening in pipeline
C. Weld
D. Free-stream weldolet (purchased to fit pipe diameter)
3.2 T-piece applications
3.2.1 Mount with a 2 in (51 mm) T-piece (flanged fitting)
Prerequisites
• 2 in (51 mm) T-piece (flanged) installations are recommended for processes with the
following conditions:
Flow
0.5 to 5 m/s (at the pipe wall)
Viscosity Up to 100 cP, or 250 cP under some conditions
Temperature -58 °F (-50.0 °C) to 392 °F (200 °C)
-40 °F (-40.0 °C) to 392 °F (200 °C)
Note
— Flow velocity at the pipe wall and fluid viscosity must be within the limits shown to
ensure that the fluid within the pocket is refreshed in a timely manner. This
installation will not respond as rapidly as the free-stream installation to step
changes in viscosity.
— The thermal mass of the flanges may affect the response time of the meter to
temperature changes.
Installation Manual
Mounting
MMI-20020989 May 2019
Installation Manual 21
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