Process Pressure/Temperature Derating Curves - Siemens Sitrans LR250 Instruction Manual

Process Pressure/Temperature derating curves

1)
Notes:
• The Process Device Tag shall remain with the process pressure boundary
1)
assembly . In the event the instrument package is replaced, the Process Device Tag
shall be transferred to the replacement unit.
• SITRANS LR250 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.
WARNINGS:
• Never attempt to loosen, remove or disassemble process connection or
instrument housing while vessel contents are under pressure.
• This product is designated as a Pressure Accessory per Directive 97/ 23 / EC
and is not intended for use as a safety device.
• 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.
• Improper installation may result in loss of process pressure and/or
release of process fluids and/or gases.
1)
The process pressure boundary assembly comprises the components that act as a barrier
against pressure loss from the process vessel: that is, the combination of process connec-
tion body and emitter, but normally excluding the electrical enclosure.
Page 120 SITRANS LR250 (PROFIBUS PA) – INSTRUCTION MANUAL 7ML19985JF02