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// Stream Numbering and Drawing

  • Process streams are identified by a number in a diamond box
  • Number streams from left to right as much as possible
  • Horizontal lines are dominant
  • Add arrows for q Change in direction q Inlet of equipment
  • Utility streams should use convention given in Table 1.3, lps, cw, fg, etc.
  • Since diagrams are small, not much stream information can be included
  • Include important data – around reactors and towers, etc.
    • Flags are used – see toluene HDA diagram
    • Full stream data, as indicated in Table 1.4, are included in a separate flow summary table – see Table 1.5

// Stream Information – Flags

Table 1.4: Information in a Flow Summary

Woman engineer working on blueprint
Woman engineer working on flowsheet

Essential Information

  • Stream Number
  • Temperature (°C)
  • Pressure (bar)
  • Vapor Fraction
  • Total Mass Flow Rate (kg/h)
  • Total Mole Flow Rate (kmol/h)
  • Individual Component Flow Rates (kmol/h)

Optional Information

  • Component Mole Fractions
  • Component Mass Fractions
  • Individual Component Flow Rates (kg/h)
  • Volumetric Flow Rates (m3/h)
  • Significant Physical Properties
    • Density
    • Viscosity
    • Other
  • Thermodynamic Data
  • Heat Capacity
  • Stream Enthalpy
  • K-values
  • Stream Name                                    
Worker analyzing very important information
Worker analyzing very important information

A Portion of Table 1.5