DESCRIPTION

Process Flow Diagrams (PFDs) are developed to show

Interconnection of main process units
Change in conditions - flow, temperature, pressure, composition, MW, Heat Capacity, Density, Viscosity - for different phases, gas/oil/aqueous as appropriate
Key design features of equipment
Major control loops

Break processes into logical parts e.g. production, compression, fuel gas, compressed air etc
Show Vents/Drains as diamond with relevant legend
e.g. VH = High Pressure Vent Header, VL = LP Vent Header
Sample PFD