Rosemount Tank Radar AB 5900 用户手册

300520EN, Rev AA
November 2009

3-13

Rosemount 5900 Series

Section 3. Installation

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.

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.