UFC 3 -430-11
14 February 2001
3-11
INSTRUMENT TUBING AND PIPING. Do not bring lines containing p rocess
fluids such as water and steam into the control room, control panels or control boards.
Keep pneumatic signals in and out of the control room to a minimum. Use
electronic signals instead. Avoid pneumatic signals in controlled pressure sensitive
areas. Certain pneumatic local instruments "bleed" air to their environment.
Use recommended practices for installation of piping and tubing in control
centers as defined by ISA-RP60.9, Piping for Control Centers .
3-12
IDENTIFICATION. Identify all instr uments and controls with a stainless steel
metal tag permanently mounted on the instrument. Include the instrument number and
service in the identification.
3-12.1
Nameplates. Provide nameplates for all panel instruments on both the front
and the rear of the panel. Minimum front panel information must include instrument
number, service, scale factors, and units. The rear of panel only requires the instrument
number. Use recommended practices on panel nameplates as defined by ISA-RP60.6,
Nameplates, Labels and Tags for Control Centers .
3-12.2
Terminations. Identify each electrical and tubing terminal with the instrument
item number to which it connects. Tag and number all terminals and the ends of all
wires. Identify all electrical conduits as to type of wiring (power, thermocouple, DC
signals, or other).
3-12.3
Instruments. Identify all local instruments such as valves and switches with
the item number of the instrument with which it operates.
3-13
INSTRUMENT SPECIFICATION FORMS. Use instrument specification
forms when ordering instruments. Forms and specification checklists for a number of
instruments are provided in ISA-S20, Specification Forms for Process Measurement
and Control Instruments, Primary Elements and Control Valves. Obtain complete
information on the instrument from the manufacturer before ordering. Sources of
information include manufacturer catalogs, data sheets and other literature. Provide all
data required for ordering the instrument. Specify all items including optional selections
and deviations from the manufacturers standard.
3-14
DRAWINGS. Use standard symbols. For standard symbols, presentation,
and terminology refer to the following industry standards.
ANSI/ISA-S5.1, Instrumentation Symbols and Identification
ISA-S5.3, Graphic Symbols for Distributed Control/Shared Display
Instrumentation, Logic and Computer Systems
ANSI/ISA-S5.4, Instrument Loop Diagrams
Provide control schematic diagrams, logic diagrams, and instrument loop
diagrams.
3-7
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