Emerson Rosemount 5900C, Reference Manual

Page: 40 / 322

Flange requirements
The Rosemount 5900C with Still-pipe Array Antenna fits flanges of size 5, 6, 8, 10 and 12
inch. The gauge has a flange for sealing the tank. The tank flange must be horizontal
within ±2°.
Figure 3-11: The Flange Must Be Horizontal Within ±2°
Recommended installation
When designing new tanks, an 8 inch still-pipe or larger is recommended. This is
particularly important in tanks with sticky and viscous products. See drawing
D9240041-917 “Recommended still-pipes” for more information on recommended still-
pipes for the Rosemount 5900C. Before manufacturing a new still-pipe, we recommend
that you contact Emerson Automation Solutions / Rosemount Tank Gauging for advice.
For highest performance, the total area of the slots or holes in the still-pipe must not
exceed the values shown in
Table 3-7 below. The listed values refer to the total area of the
holes over the entire length of the pipe, regardless of its length. In some cases it is possible
to allow a larger total area than stated in
Table 3-7 . When the limits are exceeded, please
contact Emerson Automation Solutions / Rosemount Tank Gauging for advice.
Table 3-7: Maximum Area of Slots and Holes
Pipe Dimension (inch) Max. Area of Slots and Holes (m
2
)
5 0.1
6 0.1
8 0.4
10 0.8
12 1.2
Installation Reference Manual
September 2019 00809-0100-5901
40 Reference Manual