Emerson 308014EN Manuel D’Utilisation

Page de 166
Rosemount Tank Radar REX
Chapter 10 Mechanical Installation
10-22
Installation Manual
308014EN, Edition 4
May 2013
10.3.4 Recommended Installation
When constructing new tanks, an 8" still pipe or larger is recommended. 
This is especially relevant in tanks with sticky, viscous products. Before 
manufacturing a new still pipe, we recommend that you contact Emerson 
Process Management / 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 10-2 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 10-2. When the limits are exceeded, 
please contact Emerson Process Management / Rosemount Tank 
Gauging for advice. 
Table 10-2. Maximum area of the slots or holes.
Pipe Dimension 
(inch)
5
6
8
10
12
Max Area of 
Slots or Holes 
(m
2
)
0.1
0.1
0.4
0.80
1.2