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Symbols For Process Flow Diagrams and Engineering Line Diagrams

The following symbols are generally in accordance with BS 1553-1...and BS 5070


Different Line Types.


Different Pipe Supports.


Symbols for Fitting and Representations.


Symbols for Valves

v


Symbols for Valve Actuators.


Symbols for Instruments.





Instrument Indentifiers

Measured Variable Type of Conditioner Type of Component
F = Flow R = Recorder T = Transmitter
L = Level I = Indicator M = Modifier
P = Pressure C = Controller E = Element
Q = Quantity A = Alarm  
T = Temperature    


Symbols for Process Equipment.

The level of detail for the equipment relates to the type of schematic being produced.   A Process Flow Sheet will only show the basic level of information sufficient to show the essential process flowpaths.   An Engineering Line Diagram of P & ID drawing will show a much more detailed representation.








Line Tags and Equipment Identification.

Links Providing information on Drawing
  1. Process Flow Diagrams... A short download document including some symbols and some diagrams
  2. Designing a Proces Flow Sheet... A download document including some symbols and some diagrams


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Remember - the information on this site is for general information purposes only and while we endeavour to keep the information up to date and correct, we make no representations or warranties of any kind, express or implied, about its completeness, accuracy, reliability, suitability or availability. Any reliance you place on such information is therefore strictly at your own risk.

Roy Beardmore passed away on 9th March 2013. He is sadly missed. This website, Roymech, has been an invaluable resource for engineers around the world and we hope to maintain this incredible legacy going forward.

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