Figure 1: Fluenta’s minimum straight up- and downstream distances to disturbances.
5.1.1.1 Space Requirements for the Transducer Full Size, TFS
There are two different space requirements for the TFS installation. This is due to the fact
that for pipes with a diameter of 10” and less, the mounting angle for the upstream holder (U)
is 48°, and for the downstream holder (D) the angle is 42°. Pipes with diameters from 12” to
72” have a mounting angle of 45° for both holders. Table 1 below shows the distances
required and in Appendix I there is a schematic of the installation for both sets of diameters.
Note that the Perpendicular Distance is the distance that the mounted transducer assembly
protrudes from the side of the pipe, and the Length is the length of the assembly without
regard to the pipe.
Table 1: The space requirements for Transducer Full Size, TFS.
5.1.1.2 Space Requirements for the Temperature and Pressure Transmitters
The pressure and temperature transmitters must be mounted no closer than 2D (where D =
diameter of the pipe) downstream of path between the transducers (this does not apply to
certain pre fabricated spool pieces) and no longer away than 1,000 mm (where 2D is more
than 1,000 mm the transmitters must be mounted 1,000 mm away). The temperature
transmitter’s intrusive design requires that it be mounted as the furthermost transmitter.
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