Process Flow Diagram explanation....

Process Flow Diagrams (PFD) should not be confused with P&ID's. PFD’s are considered the forerunner of Piping and Instrumentation Diagram. They are also known as a System Flow Diagram (SFD) or Flow Diagram.

A Process Flow Diagram should only  include:

  • Process Piping, major equipment symbols, names and identification numbers, control valves and main valves that affect operation of the system, interconnection with other systems, major bypass and re-circulation lines, and may include a table showing each streams process data.

A Process Flow Diagram should not include:

  • Minor components, minor piping systems, piping ratings and designations, isolation and shut off valves, control schemes, relief and safety valves.

When to use a Process Flow Diagram.....

  • When planning a grass roots project
  • When developing or understanding overview of the process.
  • When a process needs to be studied for improvement.
  • To communicate to others general chemistry and flow of the process.
  • When better communication is needed between people involved with the same process.
  • To document a process.
  • When all streams need to be clearly communicated in that process.

Process Flow Canvas

The PFD canvas operates the same as the P&ID canvas except it has fewer components. The data collection for the PFD graphics is same as the  P&ID data collection graphics allowing the user to import photos or documents. The use can also create a process stream data sheets using any electronic spreadsheet (such as; Microsoft Excel) and import it to the drawing border. 

If you are looking for a simple Process Flow Diagram software that can create powerful PFD drawings, then look no farther, get a quote.