by Types of Process Diagrams
Process diagrams can be broken down into two major categories:
process flow diagrams (PFDs) and process and instrument drawings (P&IDs), sometimes called piping and instrumentation drawings.
A flow diagram is a simple illustration that uses process symbols
to describe the primary flow path through a unit. A process
flow diagram provides a quick snapshot of the operating unit.
Flow diagrams include all primary equipment and flows.
A technician can use this document to trace the primary flow
of chemicals through the unit. Secondary or minor flows are not included.
Complex control loops and instrumentation are not included. The flow
diagram is used for visitor information and new employee training.
A process and instrument drawing is more complex. The P&ID includes a
graphic representation of the equipment, piping, and instrumentation. Modern process control can be clearly inserted into the drawing to provide a process technician with a complete picture of electronic and instrument systems.
Process operators can look at their process and see how the engineering department has automated the unit. Pressure, temperature, flow, and level control loops are all included on the unit P&ID.
Process diagrams can be broken down into two major categories:
process flow diagrams (PFDs) and process and instrument drawings (P&IDs), sometimes called piping and instrumentation drawings.
A flow diagram is a simple illustration that uses process symbols
to describe the primary flow path through a unit. A process
flow diagram provides a quick snapshot of the operating unit.
Flow diagrams include all primary equipment and flows.
A technician can use this document to trace the primary flow
of chemicals through the unit. Secondary or minor flows are not included.
Complex control loops and instrumentation are not included. The flow
diagram is used for visitor information and new employee training.
A process and instrument drawing is more complex. The P&ID includes a
graphic representation of the equipment, piping, and instrumentation. Modern process control can be clearly inserted into the drawing to provide a process technician with a complete picture of electronic and instrument systems.
Process operators can look at their process and see how the engineering department has automated the unit. Pressure, temperature, flow, and level control loops are all included on the unit P&ID.
