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.
