Reference Manual
300520EN, Rev AA
November 2009
3-13
Rosemount 5900 Series
Section 3. Installation
3.2.4
LPG/LNG
Antenna
Requirements
Temperature and Pressure Measurement
A prerequisite for high accuracy level-measurements in LPG/LNG tanks is
that temperature and pressure measurements are made. The Rosemount
5900 transmitter can interface pressure sensors and up to six temperature
sensors.
Still Pipe
A still-pipe must be installed prior to the gauge installation. The still-pipe is
customer supplied and should be manufactured according to the installation
drawings.
Three types of steel pipe can be used:
• DN100
• 4" SCH 10 stainless steel pipe
• 4" SCH 40 stainless steel pipe
When ordering the gauge specify the pipe type in the Required System
Information (RSI) form.
The still-pipe must be vertical within ±0.5° and the customer flange must be
horizontal within ±1° as illustrated in Figure 3-12 on page 3-14.
The still-pipe is manufactured with a number of holes in order to provide
pressure equalization so that the product level inside the pipe is equal to the
level in the rest of the tank. The diameter of the holes should be 20 mm or
3/4".
All holes in the upper pipe section must be placed along a line on one side of
the pipe and aligned with a bolt hole on the pipe flange as illustrated in
Figure
3-11 on page 3-14
. The position of the holes must be clearly marked on the
pipe flange. The Reference Pin must be directed towards the bolt hole. The
flange marking is used to properly align the gauge with the Reference Pin,
see
Figure 3-11
.
See the
Raptor System Configuration Manual
, Document No. 300510EN, for
more information on configuration and verification of the 5900 with LPG/LNG
antenna.
Preliminary
Summary of Contents for Rosemount 5900
Page 2: ...Preliminary ...
Page 4: ...Preliminary ...
