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Gas Properties at Compressor Conditions

GPSA / API 617

Gas Properties Calculator
Calculate gas properties at operating conditions including compressibility factor (Z), density, and thermodynamic properties essential for compressor sizing per GPSA methods.

Gas Preset

Operating Conditions

psia
°F

Gas Properties

air = 1.0
lb/lbmol

Critical Properties

psia
°R

Typical Gas Property Values

  • Z-factor: 0.85-0.98 (natural gas)
  • k-value: 1.25-1.32 (natural gas)
  • SG: 0.55-0.80 (natural gas)
  • Z-factor accounts for real gas behavior

Standards & References

  • GPSA
    Section 23: Physical Properties
  • AGA Report No. 8
    Compressibility Calculation