CiDRA SONARtrac GVF-100 - Manual (Page 39)

Copyright © 2006 CiDRA Corporation Page 7-21
20675-01 Rev 02
7.8 Installations on Tubing
The sensor head will fit on process tubing as well as pipe. This is
accomplished through the use of a sensor band specifically sized for
tubing and the use of elastomeric strips wrapped around the tube (in
order to increase the tube diameter to that of pipe) in the areas of the
pipe seal gaskets on the fiberglass cover.
A sensor band specifically sized for use on tube must be ordered (the
overall length of the tube-sized sensor band will be shorter than a pipe
sized band due to the difference in outside diameter of a specific size
tube vs. pipe).
Installation is as follows:
1. Clean the tube where the sensor head will be installed. The
overall clean length should be at least 30 inches (76 cm).
2. Measure a distance of 24 inches (70 cm) on the cleaned tube and
mark this distance on the tube.
3. Install the elastomeric strips such that the in-board edges of them
align with the marks on the tube, and the paper covered adhesive
strips will contact the tube.
a. Remove the paper strips covering the adhesive.
b. Wrap the elastomeric strip 3/4
ths
of the way around the pipe.
Pull it taut so it lies smoothly and evenly on the pipe.
c. Apply a bead of the Teflon sealant (provided for the cover
gaskets) along the seam at the starting edge of the
elastomeric strip.
d. Continue to wrap the elastomeric strip overlapping the
previous layer.
e. Once the wrap is complete, apply a bead of the Teflon sealant
along the seam.
f. Install the second strip per the above steps
4. Continue with installation of sensor head as previously described
in the manual.
Figure 28 Elastomeric Strip Installation on Tubes
Process
tube
Seams (may or
may not align
Wrap elastomeric strip around pipe; apply
Teflon sealant to ends
Clean areas for
elastomeric strips
and sensor
24 inches
between
elastomeric strips