The standard is intended to provide sufficient information to enable anyone reading a flow diagram and ... instrumentation systems used for measurement and control. To this end, a designation system ...

commonly used equipment symbols, and practitioner experience. Further, while process flow diagrams (PFDs) are well understood by that name, piping and instrument diagrams (P&IDs) may exist under ...

Symbols linked together form a flow chart. Flow chart programming ... until a certain condition is met variables that store data for use in decision making ...