Emerson Rosemount 3095 - Impulse Piping

Reference Manual
00809-0100-4716, Rev JA
May 2008
Rosemount 3095 MultiVariable
2-6
Figure 2-3. Example
Installations.
NOTE
In steam service, lines should be filled with water to prevent contact of the live
steam with the transmitter.
Impulse Piping Impulse piping, which is the piping between the process and the transmitter,
must accurately transfer the pressure in order to obtain accurate
measurements. In this pressure transfer, there are five possible sources of
error: leaks, friction loss (particularly if purging is used), trapped gas in a liquid
line, liquid in a gas line, and temperature-induced or other density variation
between the impulse piping.
In steam or other elevated temperature services, it is important that temperatures at
the coplanar process flanges not exceed 185 °F (85 °C).
LIQUID SERVICE
GAS SERVICE
Flow
Flow
Flow
STEAM
SERVICE
Flow