PFD - Process Flow Diagram

Sponsored Links

A Process Flow Diagram - PFD - (or System Flow Diagram - SFD) shows the relationships between the major components in the system. PFD also tabulate process design values for the components in different operating modes, typical minimum, normal and maximum. A PFD does not show minor components, piping systems, piping ratings and designations.

A PFD should include:

• Process Piping
• Major equipment symbols, names and identification numbers
• Control, valves and valves that affect operation of the system
• Interconnection with other systems
• Major bypass and recirculation lines
• System ratings and operational values as minimum, normal and maximum flow, temperature and pressure
• Composition of fluids

This figure depict a small and simplified PFD:

System Flow Diagrams should not include:

• pipe class
• pipe line numbers
• minor bypass lines
• isolation and shutoff valves
• maintenance vents and drains
• relief and safety valve
• code class information
• seismic class information

• Example - Process Flow Diagram
• Piping & Instrumentation Diagram - P&ID?

Sponsored Links

Related Topics

• Design Strategies - Piping systems and design strategies - documentation, P&ID, flow diagrams - capacities and limits
• Documentation - Documentation of process control systems - Block Flow Diagrams (BFD), Process Flow Diagrams (PFD), Piping and Instrumentation Diagrams (P&ID) and more
• Process Control - Instrumentation and process control systems - engineering and documentation

Related Documents

• BFD - Block Flow Diagram - It is common to use the Block Flow Diagram - BFD - as a schematic illustration of the major process
• HVAC Diagram - Online Drawing - Draw HVAC diagrams - Online with Google Docs
• P&ID - Piping and Instrumentation Diagram - A Piping and Instrumentation Diagram - P&ID, is a schematic illustration of functional relationship of piping, instrumentation and system equipment components
• P&ID Diagram - Online Drawing - Draw P&ID diagrams - Online with Google Docs
• PFD - Process Flow Diagram - Example - A Process Flow Diagram - PFD - example
• PFD - Process Flow Diagram - Online Drawing - Draw Process Flow Diagrams - Online with Google Docs