FPD350 Torbar
Averaging pitot tubes
2 Initial Installation
6
OI/FPD350–EN Rev. H
2.2.6 Straight Pipe Requirements
To meet specified accuracy figures, install Torbar at distances of
no less
than those shown in Fig. 2.7 from flow disturbances in
the pipe. If Torbar is installed within distances less than those
shown, absolute accuracy will decrease BUT repeatability of
measurement will continue to be excellent due to the inherent
averaging characteristics. If it is not possible to comply with this
instruction and maximum accuracy is required, or for other
piping configurations, consult ABB.
2.2.7 Lagging
(steam applications only)
The following instructions apply to both horizontal and vertical
pipe installations:
1. Lag the entire Torbar head and fitting assembly extending
to the process pipe to prevent the formation of
condensate. Excessive amounts of condensate forming in
the head or fitting assembly has a detrimental effect on the
correct functioning of Torbar. Extend the lagging to (but do
not lag) the filling tees, condensate pots (if fitted) and
isolation valve handles.
2. In retractable Torbar installations, ensure the lagging is
easily removable.
3. Ensure the tag plate is positioned outside the lagging for
ease of identification.
2.3 Models FPD350.T1.T1/W1/F1
Models FPD350.T1.T1/W1/F1 are supplied with the Torbar
element installed in a pipe section. Table 2.1 details the type of
fitting supplied with each model. The pipe length and relevant
thread or flange sizes are shown on the drawing supplied with
the Torbar.
Fig. 2.7 Straight Pipe Requirements
3 D
8 D
3 D
8 D
4 D
24 D
3 D
3 D
4 D
7 D (in plane)
9 D (out of plane)
9 D (in plane)
14 D (out of plane)
19 D (in plane)
24 D (out of plane)
Model
Fitting
FPD350.T1.W1
Butt weld
FPD350.T1.T1
Threaded
FPD350.T1.F1
Flanged
Table 2.1 Models FPD350.T1.T1/W1/F1
