Process flow diagram
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What is the difference between a Process Flow Diagram PFD and a PID?
The former has no control points, while the latter does
The latter is a refinement of the former; it is more specific than the former and includes control points, while the former does not have any control points
Search for comparisons between PFD and PID online, and it will become clear~
A PFD is a simple, principle-based flow diagram, while a PID is a more detailed flow diagram with control points.
The former focuses on process design, while the latter emphasizes system configuration
PFD Process flow diagram PID Process / Piping and Instrument diagram
The former has no control points, while the latter does
PFD is used for the process flow diagrams of equipment systems, while PID is used for the process flow diagrams of control nodes in equipment and piping systems