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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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Last Updated 19/01/2013