Measurement symbols – auxiliary and accessory devices Bubble May Be Omitted If Connected To Another Instrument. Thermowell, Flanged. Diaphragm Pressure Seal, Welded. Diaphragm Pressure Seal, Flanged, Threaded, Socket Welded, Or. read more…
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Self-actuated final control element
Tag number shall be omitted if valve is otherwise identified. Restriction orifice hole drilled in valve plug. Note required for multi-stage or capillary tube types. Single stage orifice plate as. read more…
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Secondary Instruments
Measurement symbols – secondary instruments Pressure Temperature Thermometer Pressure gauge Multiple gauges may be shown as one bubble or one bubble for each section Gage glass externally mounted on vessel. read more…
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Primary Elements
Measurement symbols – primary elements Bubble may be omitted if connected to another instrument. Strain gauge or other electronic type sensor. May be through top of vessel. Guide wires may. read more…
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measurement notations
Measurement symbols – measurement notations Weight, Force TRAN = Transistor SG = Strain gage P-V = Pressure-vacuum MAN = Manometer US = Ultrasonic TTS = Transit time sonic TAR =. read more…
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Auxiliary and Accessory Devices
Measurement symbols – auxiliary and accessory devices Bubble May Be Omitted If Connected To Another Instrument. Thermowell, Flanged. Diaphragm Pressure Seal, Welded. Diaphragm Pressure Seal, Flanged, Threaded, Socket Welded, Or. read more…
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Primary Elements and Transmitters
Transmitter With Close-coupled Primary Element Inserted In Or On Process Flow Line, Vessel, Or Equipment, Bubble/graphic Format. Connecting Line Shall Be Equal To Or Less Than 0.25 Inches (6 Millimeters).
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instrument-to-instrument connections
Line symbols – instrument-to-instrument connections Display, Shared Control System. Communication Link And System Bus, Between Devices And Functions Of A Shared Wireless Communication Link. Wireless Instrumentation Signal. Unguided Electromagnetic Signals,. read more…
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Line symbols – instrument to process and equipment connections
Line symbols – instrument to process and equipment connections Type Of Tracing Indicated By: [et] Electrical, [st] Steam, [cw] Chilled Water, Etc. Heat [cool] Traced Impulse Or Sample Line From. read more…
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