Process Pressure/Temperature Derating Curves - Siemens SITRANS L Operating Instructions Manual

Where the chart does not apply, please use your own judgement regarding the use of
SITRANS LR200. See Electronics temperature (3.3.) (Page 117) to monitor the internal
temperature.
If the internal temperature exceeds the maximum allowable limit, a sun shield or a longer
nozzle may be required.
C.9

Process pressure/temperature derating curves

Never attempt to loosen, remove or disassemble process connection or instrument housing
while vessel contents are under pressure.
Improper installation may result in loss of process pressure and/or release of process fluids
and/or gases.
Note
• The Process Device Tag shall remain with the process pressure boundary assembly
event the instrument package is replaced, the Process Device Tag shall be transferred to
the replacement unit.
• SITRANS LR200 units are hydrostatically tested, meeting or exceeding the requirements of
the ASME Boiler and Pressure Vessel Code and the European Pressure Equipment
Directive.
• The serial numbers stamped in each process connection body, (flange, threaded, or
sanitary), provide a unique identification number indicating date of manufacture.
Example: MMDDYY – XXX (where MM = month, DD = day, YY = year, and XXX= sequential
unit produced) Further markings (space permitting) indicate flange configuration, size,
pressure class, material, and material heat code.
• Materials of construction are chosen based on their chemical compatibility (or inertness)
for general purposes. For exposure to specific environments, check with chemical
compatibility charts before installing.
• The user is responsible for the selection of bolting and gasket materials which will fall
within the limits of the flange and its intended use and which are suitable for the service
conditions.
The process pressure boundary assembly comprises the components that act as a barrier
1)
against pressure loss from the process vessel: that is, the combination of process connection
body and emitter, but normally excluding the electrical enclosure.
SITRANS LR200 with PROFIBUS PA
Operating Instructions, 07/2021, A5E32337680-AF
WARNING
CAUTION
C.9 Process pressure/temperature derating curves
Technical reference
. In the
1)
187