A complete collection of the most used P&ID symbols for lines, piping, valves, instruments, pumps, compressors, pressure equipment and other mechanical equipment. 

 

WHAT IS P&ID?

P&ID is the acronym for “Piping and instrumentation diagram”, i.e. a very detailed diagram showing the processes happening within a plant, the involved equipment, and their interconnections.

A set of standardized P&ID symbols is used by process engineers to draft such diagrams. P&ID symbols exist for all major components and lines, such as valves, vessels, instruments, pumps, compressors, and towers. The ISA S5.1, ISO 10628, and BS 5070 cover the standardization of P&ID symbols and guide process engineers in their plant design activities.

The most common P&ID symbols are listed below:

 

LINES P&ID SYMBOLS

Line P&ID symbols

 

PIPING P&ID SYMBOLS

Clamped Flange Coupling P&ID symbol Clamped Flange Coupling P&ID symbol
Coupling P&ID symbol Coupling P&ID symbol
End Caps 01 P&ID symbol End Caps 01 P&ID symbol
End Caps 02 P&ID symbol End Caps 02 P&ID symbol
Flange P&ID symbol Flange P&ID symbol
Flanges P&ID symbol Flanges P&ID symbol
Reducers P&ID symbol Reducers P&ID symbol
Removable Spool P&ID symbol Removable Spool P&ID symbol
Union P&ID symbol Union P&ID symbol

 

VALVES P&ID SYMBOLS

Gate Valve P&ID symbol Gate Valve P&ID symbol
Normally Closed Gate Valve P&ID symbol Normally Closed Gate Valve P&ID symbol
Ball Valve P&ID symbol Ball Valve P&ID symbol
Normally Closed Ball Valve P&ID symbol normally closed ball valve P&ID symbol
Globe Valve P&ID symbol globe valve P&ID symbol
Butterfly Valve P&ID symbol butterfly valve P&ID symbol
Check Valve P&ID symbol check valve P&ID symbol
Plug Valve P&ID symbol plug valve P&ID symbol
Needle Valve P&ID symbol needle valve P&ID symbol
Self Draining Valve P&ID symbol self draining valve P&ID symbol
Integrated Block and Bleed Valve P&ID symbol integrated block and bleed valve P&ID symbol
Auto Recirculation Valve P&ID symbol
Angle Valve P&ID symbol angle valve P&ID symbol
Angle Globe Valve P&ID symbol angle globe valve P&ID symbol
3-way Valve P&ID symbol 3way valve P&ID symbol
Y Blowdown Valve P&ID symbol Y blowdown valve P&ID symbol
Angle Blowdown Valve P&ID symbol Angle Blowdown valve P&ID symbol

 

FILTERS P&ID SYMBOLS

Filters P&ID symbols

 

INSTRUMENTS P&ID SYMBOLS

Analyser Transmitter P&ID symbol Analyzer Transmitter P&ID symbol
AND Gate P&ID symbol AND Gate P&ID symbol
Averaging Pitot Tube P&ID symbol Averaging Pitot Tube P&ID symbol
Behind Control P&ID symbol Behind Control P&ID symbol
Behind Local Control P&ID symbol Behind Local Control P&ID symbol
Computer P&ID symbol Computer P&ID symbol
Computer Indicator P&ID symbol Computer Indicator P&ID symbol
Coriolis Flow Sensor P&ID symbol Coriolis Flow Sensor P&ID symbol
Correcting Element P&ID symbol Correcting Element P&ID symbol
 Diamond P&ID symbol  Diamond P&ID symbol
Diaphragm Meter P&ID symbol Diaphragm Meter P&ID symbol
Displayed Configurable P&ID symbol Displayed Configurable P&ID symbol
Displayed Programmable Indicator P&ID symbol Displayed Programmable Indicator P&ID symbol
Double P&ID symbol Double P&ID symbol
Flow Controller P&ID symbol Flow Controller P&ID symbol
Flow Element P&ID symbol Flow Element P&ID symbol
Flow Indicator P&ID symbol Flow Indicator P&ID symbol
Flow Meter P&ID symbol Flow Meter P&ID symbol
Flow Nozzle Meter P&ID symbol Flow Nozzle Meter P&ID symbol
Flow Recorder P&ID symbol Flow Recorder P&ID symbol
Flow Transmitter P&ID symbol Flow Transmitter P&ID symbol
Flowmeter P&ID symbol Flowmeter P&ID symbol
Flume Meter P&ID symbol Flume Meter P&ID symbol
Indicator 01 P&ID symbol Indicator 01 P&ID symbol
Level Alarm P&ID symbol Level Alarm P&ID symbol
Level Controller P&ID symbol Level Controller P&ID symbol
Level Gauge P&ID symbol Level Gauge P&ID symbol
Level Indicator P&ID symbol Level Indicator P&ID symbol
Level Meter P&ID symbol Level Meter P&ID symbol
Level Recorder P&ID symbol Level Recorder P&ID symbol
Level Transmitter P&ID symbol Level Transmitter P&ID symbol
Magnetic Flow Meter P&ID symbol Magnetic Flow Meter P&ID symbol
Manhole P&ID symbol Manhole P&ID symbol
NOT Gate P&ID symbol NOT Gate P&ID symbol
Odometer P&ID symbol Odometer P&ID symbol
On Central Control Panel P&ID symbol On Central Control Panel P&ID symbol
On Local Control Panel P&ID symbol On Local Control Panel P&ID symbol
OR Gate P&ID symbol OR Gate P&ID symbol
Pitot Tube P&ID symbol Pitot Tube P&ID symbol
Pitot Tube Type Flow Meter P&ID symbol Pitot Tube Type Flow Meter P&ID symbol
Pressure Controller P&ID symbol Pressure Controller P&ID symbol
Pressure Gauge P&ID symbol Pressure Gauge P&ID symbol
Pressure Gauges P&ID symbol Pressure Gauges P&ID symbol
Pressure Indicating controller P&ID symbol Pressure Indicating controller P&ID symbol
Pressure Indicator P&ID symbol Pressure Indicator P&ID symbol
Pressure Recorder P&ID symbol Pressure Recorder P&ID symbol
Pressure Recording Controller P&ID symbol Pressure Recording Controller P&ID symbol
Pressure Transmitter P&ID symbol Pressure Transmitter P&ID symbol
Programmable Indicator P&ID symbol Programmable Indicator P&ID symbol
Quick Change Meter P&ID symbol Quick Change Meter P&ID symbol
Rotary Meter P&ID symbol Rotary Meter P&ID symbol
Rotometer P&ID symbol Rotometer P&ID symbol
Sampler P&ID symbol Sampler P&ID symbol
Shared Indicator 01 P&ID symbol Shared Indicator 01 P&ID symbol
Shared Indicator 02 P&ID symbol Shared Indicator 02 P&ID symbol
Socket Connection P&ID symbol Socket Connection P&ID symbol
Speciality Item P&ID symbol Speciality Item P&ID symbol
Steam Traced P&ID symbol Steam Traced P&ID symbol
Straightening Vane P&ID symbol Straightening Vane P&ID symbol
Support Bracket P&ID symbol Support Bracket P&ID symbol
Support Leg P&ID symbol Support Leg P&ID symbol
Support Ring P&ID symbol Support Ring P&ID symbol
Support Skirt P&ID symbol Support Skirt P&ID symbol
Target Meter P&ID symbol Target Meter P&ID symbol
Temperature Controller P&ID symbol Temperature Controller P&ID symbol
Temperature Element P&ID symbol Temperature Element P&ID symbol
Temperature Indicator P&ID symbol Temperature Indicator P&ID symbol
Temperature Recorder P&ID symbol Temperature Recorder P&ID symbol
Temperature Transmitter P&ID symbol Temperature Transmitter P&ID symbol
Thermometer P&ID symbol Thermometer P&ID symbol
Thermometers P&ID symbol Thermometers P&ID symbol
Transducer P&ID symbol Transducer P&ID symbol
Turbine Meter P&ID symbol Turbine Meter P&ID symbol
Ultrasonic Meter P&ID symbol Ultrasonic Meter P&ID symbol
Unit Control Panel P&ID symbol Unit Control Panel P&ID symbol
V Cone Meter P&ID symbol V Cone Meter P&ID symbol
Venturi P&ID symbol Venturi P&ID symbol
Venturi Meter P&ID symbol Venturi Meter P&ID symbol
Vortex Sensor P&ID symbol Vortex Sensor P&ID symbol
Wedge Meter P&ID symbol Wedge Meter P&ID symbol
Weir Meter P&ID symbol Weir Meter P&ID symbol

 

PUMPS P&ID SYMBOLS

Cavity Pump P&ID symbol Cavity Pump P&ID symbol
Centrifugal Pumps 01 P&ID symbol Centrifugal Pumps 01 P&ID symbol
Centrifugal Pumps 02 P&ID symbol Centrifugal Pumps 02 P&ID symbol
Centrifugal Pumps 03 P&ID symbol Centrifugal Pumps 03 P&ID symbol
Centrifugal Pumps 04 P&ID symbol Centrifugal Pumps 04 P&ID symbol
Centrifugal Pumps 05 Centrifugal Pumps 05
Gear Pump P&ID symbol Gear Pump P&ID symbol
Horizontal Pump P&ID symbol Horizontal Pump P&ID symbol
ISO Centrifugal Pump P&ID symbol ISO Centrifugal Pump P&ID symbol
ISO Diaphragm Pump P&ID symbol ISO Diaphragm Pump P&ID symbol
ISO Gear Pump P&ID symbol ISO Gear Pump P&ID symbol
ISO Liquid Pump P&ID symbol ISO Liquid Pump P&ID symbol
ISO Positive Displacement Pump P&ID symbol ISO Positive Displacement Pump P&ID symbol
ISO Progressive Pump P&ID symbol ISO Progressive Pump P&ID symbol
ISO Screw Pump P&ID symbol ISO Screw Pump P&ID symbol
Liquid Ring Vacuum Pump P&ID symbol Liquid Ring Vacuum Pump P&ID symbol
Peristaltic Pump P&ID symbol Peristaltic Pump P&ID symbol
Positive Displacement Pump 01 P&ID symbol Positive Displacement Pump 01 P&ID symbol
Positive Displacement Pump 02 P&ID symbol Positive Displacement Pump 02 P&ID symbol
Positive Displacement Pump 03 P&ID symbol Positive Displacement Pump 03 P&ID symbol
Proportionating Pump P&ID symbol Proportionating Pump P&ID symbol
Pump 01 P&ID symbol Pump 01 P&ID symbol
Reciprocating Pump 01 P&ID symbol Reciprocating Pump 01 P&ID symbol
Reciprocating Pump 02 P&ID symbol Reciprocating Pump 02 P&ID symbol
Rotary Gear Pump P&ID symbol Rotary Gear Pump P&ID symbol
Rotary Pump P&ID symbol Rotary Pump P&ID symbol
Screw Pump 01 P&ID symbol Screw Pump 01 P&ID symbol
Screw Pump 02 P&ID symbol Screw Pump 02 P&ID symbol
Submersible Pump P&ID symbol Submersible Pump P&ID symbol
Sump Pump P&ID symbol Sump Pump P&ID symbol
Turbine Pump P&ID symbol Turbine Pump P&ID symbol
Vacuum Pump P&ID symbol Vacuum Pump P&ID symbol
Vertical Pump 01 P&ID symbol Vertical Pump 01 P&ID symbol
Vertical Pump 02 P&ID symbol Vertical Pump 02 P&ID symbol

 

COMPRESSORS P&ID SYMBOLS

AC Air Compressor P&ID symbol AC Air Compressor P&ID symbol
Air Compressor P&ID symbol Air Compressor P&ID symbol
Axial Compressor P&ID symbol
Centrifugal Blower P&ID symbol Centrifugal Blower P&ID symbol
Centrifugal Compressor 01 P&ID symbol Centrifugal Compressor 01 P&ID symbol
Centrifugal Compressor 02 P&ID symbol Centrifugal Compressor 02 P&ID symbol
Centrifugal Compressor 03 P&ID symbol Centrifugal Compressor 03 P&ID symbol
Centrifugal Compressor 04 P&ID symbol Centrifugal Compressor 04 P&ID symbol
Compressor 01 P&ID symbol Compressor 01 P&ID symbol
Compressor 02 P&ID symbol Compressor 02 P&ID symbol
Compressor Silencers P&ID symbol Compressor Silencers P&ID symbol
Compressor Vacuum Pump P&ID symbol Compressor Vacuum Pump P&ID symbol
Diaphragm Compressor P&ID symbol Diaphragm Compressor P&ID symbol
Ejector Compressor P&ID symbol Ejector Compressor P&ID symbol
Gas Blower P&ID symbol Gas Blower P&ID symbol
Liquid Ring Compressor P&ID symbol Liquid Ring Compressor P&ID symbol
Piston Compressor P&ID symbol Piston Compressor P&ID symbol
Reciprocating Compressor 01 P&ID symbol Reciprocating Compressor 01 P&ID symbol
Reciprocating Compressor 02 P&ID symbol Reciprocating Compressor 02 P&ID symbol
Reciprocating Compressor 03 P&ID symbol Reciprocating Compressor 03 P&ID symbol
Ring Compressor P&ID symbol Ring Compressor P&ID symbol
Roller Vane Compressor P&ID symbol Roller Vane Compressor P&ID symbol
Rotary Compressors 01 P&ID symbol Rotary Compressors 01 P&ID symbol
Rotary Compressors 02 P&ID symbol Rotary Compressors 02 P&ID symbol
Rotary Compressors and Silencers P&ID symbol Rotary Compressors and Silencers P&ID symbol
Screw Compressor P&ID symbol Screw Compressor P&ID symbol
Selectable Compressor P&ID symbol Selectable Compressor P&ID symbol
Turbo Compressor P&ID symbol Turbo Compressor P&ID symbol

VESSELS P&ID SYMBOLS

Bag P&ID symbol Bag P&ID symbol
Bag ISO P&ID symbol Bag ISO P&ID symbol
Barrel P&ID symbol Barrel P&ID symbol
Barrel ISO P&ID symbol Barrel ISO P&ID symbol
Bin P&ID symbol Bin P&ID symbol
Boiler P&ID symbol Boiler P&ID symbol
Brackets Vessel P&ID symbol Brackets Vessel P&ID symbol
Column P&ID symbol Column P&ID symbol
Cone Roof Tank P&ID symbol Cone Roof Tank P&ID symbol
Covered Tank P&ID symbol Covered Tank P&ID symbol
Dished Ends Vessel P&ID symbol Dished Ends Vessel P&ID symbol
Dome Boiler P&ID symbol Dome Boiler P&ID symbol
Dome Roof Tank P&ID symbol Dome Roof Tank P&ID symbol
Double Wall Tank P&ID symbol Double Wall Tank P&ID symbol
Drum P&ID symbol Drum P&ID symbol
Electrical Heating Vessel P&ID symbol Electrical Heating Vessel P&ID symbol
Floating Roof Tank P&ID symbol Floating Roof Tank P&ID symbol
Fluidized Bed Column P&ID symbol Fluidized Bed Column P&ID symbol
Gas Bottle P&ID symbol Gas Bottle P&ID symbol
Heating Cooling Jacket Vessel P&ID symbol Heating Cooling Jacket Vessel P&ID symbol
Hot Liquid Boiler P&ID symbol Hot Liquid Boiler P&ID symbol
Internal Floating Roof Tank P&ID symbol Internal Floating Roof Tank P&ID symbol
Knockout Drum P&ID symbol Knockout Drum P&ID symbol
Mixing Vessel P&ID symbol Mixing Vessel P&ID symbol
Onion Tank P&ID symbol Onion Tank P&ID symbol
Open Bulk Storage P&ID symbol Open Bulk Storage P&ID symbol
Open Tank P&ID symbol Open Tank P&ID symbol
Packed Tower P&ID symbol Packed Tower P&ID symbol
Packing Column 01 P&ID symbol Packing Column 01 P&ID symbol
Packing Column 02 P&ID symbol Packing Column 02 P&ID symbol
Pit Vessel P&ID symbol Pit Vessel P&ID symbol
Plate Tower P&ID symbol Plate Tower P&ID symbol
Staggered Baffle Tray Column P&ID symbol Staggered Baffle Tray Column P&ID symbol
Tank 01 P&ID symbol Tank 01 P&ID symbol
Tank 02 P&ID symbol Tank 02 P&ID symbol
Tank 03 P&ID symbol Tank 03 P&ID symbol
Tank 04 P&ID symbol Tank 04 P&ID symbol
Thermal Insulation Vessel P&ID symbol Thermal Insulation Vessel P&ID symbol
Tray Column P&ID symbol Tray Column P&ID symbol
Vertical Vessel P&ID symbol Vertical Vessel P&ID symbol
Wastewater Treatment P&ID symbol Wastewater Treatment P&ID symbol

 

MOTORS, GENERATORS, TURBINES P&ID SYMBOLS

AC Generator P&ID symbol AC Generator P&ID symbol
AC Motor P&ID symbol AC Motor P&ID symbol
DC Generator P&ID symbol DC Generator P&ID symbol
DC Motor P&ID symbol DC Motor P&ID symbol
Diesel Motor P&ID symbol Diesel Motor P&ID symbol
Electric Motor P&ID symbol Electric Motor P&ID symbol
Gear P&ID symbol Gear P&ID symbol
Generator P&ID symbol Generator P&ID symbol
Motor 01 P&ID symbol Motor 01 P&ID symbol
Motor 02 P&ID symbol Motor 02 P&ID symbol
Motor Driven Turbine P&ID symbol Motor Driven Turbine P&ID symbol
Motor Generator P&ID symbol Motor Generator P&ID symbol
Step Motor P&ID symbol Step Motor P&ID symbol
Turbine P&ID symbol Turbine P&ID symbol
Turbine Driver P&ID symbol Turbine Driver P&ID symbol
Vertical Turbines P&ID symbol Vertical Turbines P&ID symbol

 

HEAT EXCHANGERS P&ID SYMBOLS

Heat Exchangers P&ID symbols