مفهوم عبارات مورد استفاده در نقشه های پروسه P&ID و مخفف آنها
ستون اول مخفف که در نقشه های پروسه استفاده می شوند و ستون دوم مفهوم آن ها
| حرف | مفهوم | |
| A | Analog Signal | |
| AC | Analysis Controller | |
| AAH | Analysis Alarm [High] | |
| AAHL | Analysis Alarm [High/Low] | |
| AAL | Analysis Alarm [Low] | |
| AS | Air Supply | |
| ASDH | Analysis Shutdown [High] | |
| ASDL | Analysis Shutdown [Low] | |
| ASH | Analysis Switch [High] | |
| ASHL | Analysis Switch [High/Low] | |
| ASL | Analysis Switch [Low] | |
| AT | Analysis Transmitter | |
| BC | Burner Controller | |
| BAH | Burner Alarm [High] | |
| BAHL | Burner Alarm [High/Low] | |
| BAL | Burner Alarm [Low] | |
| BDV | Blowdown Valve | |
| BPR | Back Pressure Regulator | |
| BS | Burner Switch | |
| BSH | Burner Switch [High] | |
| BSHL | Burner Switch [High/Low] | |
| BSL | Burner Switch [Low] | |
| BS&W | Basic Sediment and Water | |
| CCP | Central Control Panel | |
| CDS | Compressor Shutdown | |
| CFA | Common Fault Alarm | |
| COR | Corrosimeter | |
| CSC | Car Seal Close | |
| CSO | Car Seal Open | |
| CV | Control Valve | |
| E/I | EMF to Current Converter | |
| ES | Electrical Switch | |
| ESD | Emergency Shutdown Station | |
| ESDV | Emergency Shutdown Valve | |
| FAL | Flow Alarm Low | |
| FAH | Flow Alarm High | |
| FAHH | Flow Alarm High For Level Above FAH | |
| FAHL | Flow Alarm [High/Low] | |
| FALL | Flow Alarm Low For Level Below FAL | |
| FC | Flow Controller | |
| FC | Fail Close | |
| FCV | Flow Control Valve | |
| FE | Flow Element | |
| FFA | Flame Failure Alarm | |
| FFSD | Flame Failure Shutdown | |
| FG | Flow Gage/Flow Sight Glass | |
| FI | Flow Indicator | |
| FIC | Flow Indicator Controller | |
| FIT | Flow Indicator Transmitter | |
| FO | Fial Open | |
| FQ | Flow Indicator Totaliser | |
| FQI | Flow Indicator with Total Counter | |
| FR | Flow Recorder | |
| FRC | Flow Recorder Controller | |
| FRT | Flow Recorder Transmitter | |
| FS | Flow Switch | |
| FSDH | Flow Shutdown [High] | |
| FSDL | Flow Shutdown [Low] | |
| FSH | Flow Switch [High] | |
| FSL | Flow Switch [Low] | |
| FT | Flow Transmitter | |
| FY | Computer, Relay, Amplifier or I/P | |
| Converter | in Flow Loop | |
| GS | Instrument Gas Supply | |
| H | Hydraulic | |
| HMV | Hydraulic Motor Operated Valve | |
| HOA | Hand/Off/Auto Switch | |
| HS | Hand Switch | |
| I | Current Signal | |
| I/F | Interface | |
| I/I | Current Indicator | |
| I/P | Current to Pneumatic | |
| I/PA | Current to Pneumatic Alarm | |
| KI | Clock/Timer | |
| LA | Level Alarm | |
| LAH | Level Alarm [High] | |
| LAHH | Level Alarm High for Level Above LAH | |
| LAHL | Level Alarm [High/Low] | |
| LAL | Level Alarm [Low] | |
| LALL | Level Alarm Low for Level Above LAL | |
| LC | Level Controller | |
| LCV | Level Control Valve | |
| LG | Level Gauge | |
| LI | Level Indicator | |
| LIC | Level Indicator Controller | |
| LIT | Level Indicator Transmitter | |
| LLH | Liquid Level [High] | |
| LLL | Liquid Level [Low] | |
| LLN | Liquid Level [Normal] | |
| LQ | Lock Closed When by a manual Valve | |
| LR | Level Recorder | |
| LS | Level Switch | |
| LSDH | Level Shutdown [High] | |
| LSDL | Level Shutdown [Low] | |
| LSH | Level Switch [High] | |
| LSHL | Level Switch [High/Low] | |
| LSL | Level Switch [Low] | |
| LSHH | Level Switch High for Level Above LSH | |
| LSLL | Level Switch Low for Level Below LSL | |
| LT | Level Transmitter | |
| LY | I/P Converter [Level Loop] | |
| LO | Lock Open | |
| MCC | Motor Control Center | |
| MTU | Master Terminal Unit | |
| NC | Normally Closed | |
| NO | Normally Open | |
| P | Pneumatic Signal | |
| PAH | Pressure Alarm [High] | |
| PAHL | Pressure Alarm [High/Low] | |
| PAL | Pressure Alarm [Low] | |
| PB | Pushbutton | |
| PC | Pressure Controller | |
| PCV | Pressure Control Valve | |
| PD | Pulsation Dampener | |
| PdA | Pressure Differential Alarm | |
| PdAH | Pressure Differential Alarm [High] | |
| PdAL | Pressure Differential Alarm [Low] | |
| PdI | Pressure Differential Indicator | |
| PdIC | Pressure Differential Indicator Controller | |
| PdS | Pressure Differential Switch | |
| PdSH | Pressure Differential Switch [High] | |
| PdSL | Pressure Differential Switch [Low] | |
| PG | Pressure Gage | |
| P/I | Pneumatic To Current Converter | |
| PI | Pressure Indicator | |
| PIC | Pressure Indicator Controller | |
| PIT | Pressure Indicator Transmitter | |
| PJI | Multipoint Pressure Indicator | |
| PJR | Multipoint Pressure Recorder | |
| POV | Pneumatically Operated Valve | |
| PR | Pressure Recorder | |
| PRC | Pressure Recorder Controller | |
| PRT | Pressure Recorder Transmitter | |
| PRV | Pressure Regulating Valve | |
| PSDH | Pressure Shutdown [High] | |
| PSDL | Pressure Shutdown [Low] | |
| PSE | Rupture Disk | |
| PSH | Pressure Switch [High] | |
| PSHH | Pressure Switch High for Pressure Above PSH | |
| PSHL | Pressure Switch [High/Low] | |
| PSL | Pressure Switch [Low] | |
| PSLL | Pressure Switch Low for Pressure Below PSL | |
| PSV | Pressure Safety Valve | |
| PT | Pressure Transmitter | |
| POS | Positioner | |
| PY | Relay, Computer, Amplifier, Converter | |
| RC | Ratio Controller | |
| RTD | Resistance Temperature Detector | |
| RTU | Remote Terminal Unit | |
| S | Solenoid | |
| SAH | Speed Alarm [High] | |
| SAHL | Speed Alarm [High/Low] | |
| SAL | Speed Alarm [Low] | |
| SC | Sample Connection | |
| SD | Shutdown Panel | |
| SI | Speed Indicator | |
| SR | Speed Recorder | |
| SS | Steam Supply | |
| SSH | Speed Switch [High] | |
| SSHL | Speed Switch [High/Low] | |
| SSL | Speed Switch [Low] | |
| TAH | Temperature Alarm [High] | |
| TAHL | Temperature Alarm [High/Low] | |
| TAL | Temperature Alarm [Low] | |
| TC | Temperature Controller | |
| TCV | Temperature Control Valve | |
| TD | Time Delay | |
| TE | Temperature [Measuring] Element/Thermocouple | |
| TF | Temperature Gage | |
| TH | Thermostat | |
| TI | Temperature Indicator | |
| TIC | Temperature Indicator Controller | |
| TIT | Temperature Indicator Transmitter | |
| TJI | Multipoint Temperature Indicator/Thermocouple | |
| TR | Temperature Recorder | |
| TRC | Temperature Recorder Controller | |
| TRT | Temperature Recorder Transmitter | |
| TSDH | Temperature Shutdown [High] | |
| TSDL | Temperature Shutdown [Low] | |
| TSH | Temperature Switch [High] | |
| TSHL | Temperature Switch [High/Low] | |
| TSL | Temperature Switch [Low] | |
| TT | Temperature Transmitter | |
| TW | Thermowell | |
| TY | Computer, Relay, Converter, etc. in Temp. Loop | |
| US | Utility Station | |
| VAH | Vibration Alarm [High] | |
| VSDH | Vibration Shutdown [High] | |
| VSH | Vibration Switch [High] | |
| WS | Water Supply | |
| X | Multiply | |
| ZC | Position Switch [Closed] | |
| ZO | Position Switch [Open] |
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از ۵
۴ مشارکت کننده
