Furthermore, one should consider that these diagrams don't always represent the targeted physical locations nor the proximity of each component involved. The symbols are always labeled using words, letters, and numbers to better identify and specify the components being represented.
P&ID components are represented by several standard symbols, which are not to scale, nor are their dimensions accurate. Piping and Instrumentation Diagram Symbols Detailed Documentation provides a rich set of shapes & symbols for documenting P&ID and PFD, including shapes for the instrument, valves, pump, heating exchanges, mixers, crushers, vessels, compressors, filters, motors, and connecting shapes. There are usually mostly made and used by engineers designing a manufacturing process for a particular physical plant.
Piping & Instrumentation Diagram (P&ID) is a graphical and schematic representation of the functional relationship between piping, instrumentation, and system equipment components used in the field of automation and instrumentation.
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