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Gas Pipeline Local Pressure

Calculate single phase gas pipeline local stationary pressure from elevation for dry and wet pipelines.

For dry pipelines external pressure is ignored. For wet pipelines the external pressure is included. The internal fluid density is assumed constant. Use the Result Plot option to plot pressure versus elevation.

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CALCULATOR : Single Phase Gas Pipeline Local Pressure From Elevation (Dry) [FREE]   ±

Calculate single phase gas pipeline local stationary internal pressure from elevation for dry pipelines.

For dry pipelines external pressure is ignored. Elevation is measured relative to an arbitrary datum (see figure). Mean sea level (MSL) is commonly used as a datum.

Tool Input

  • pletype : External Pressure Type
    • Pleu : User Defined Local External Pressure
  • plitype : Internal Pressure Type
    • Priu : User Defined Reference Internal Pressure
    • Pliu : User Defined Local Internal Pressure
  • ρf : Internal Fluid Density
  • ρe : External Fluid Density
  • Zr : Reference Elevation Relative To Datum
  • Zl : Local Elevation Relative To Datum
  • Zs : Surface Elevation Relative To Datum

Tool Output

  • ΔPl : Pressure Difference Across Pipe Wall
  • Δz : Local Elevation Relative To Reference Elevation
  • Ple : External Pressure
  • Pli : Internal Pressure At Local Elevation
  • Pri : Internal Pressure At Reference Elevation
  • wd : Water Depth

CALCULATOR : Single Phase Gas Pipeline Local Pressure From Elevation (Submerged) [FREE]   ±

Calculate single phase gas pipeline local stationary internal and external pressure from elevation for submerged pipelines.

Elevation is measured relative to an arbitrary datum (see figure). Mean sea level (MSL) is commonly used as a datum.

Tool Input

  • plitype : Internal Pressure Type
    • Priu : User Defined Reference Internal Pressure
    • Pliu : User Defined Local Internal Pressure
  • ρf : Internal Fluid Density
  • Zr : Reference Elevation Relative To Datum
  • Zl : Local Elevation Relative To Datum

Tool Output

  • Δz : Local Elevation Relative To Reference Elevation
  • Pli : Internal Pressure At Local Elevation
  • Pri : Internal Pressure At Reference Elevation

CALCULATOR : Single Phase Gas Compressibility Factor [FREE]   ±

Calculate single phase gas density and compressibility factor from temperature and pressure, and gas properties for selected gases.

The gas compressibility factor is calculated from the critical point temperature, critical point temperature, and the accentric factor using either the Peng Robinson, Soave, Redlich Kwong or Van Der Waals equations of state (EOS). The compressibility factor calculation is valid for gas phase only. Use the Result Plot option to plot compressibility factor versus pressure and temperature, compressibility factor versus pressure and equation of state type, or compressibility factor versus temperature and equation of state type.

Tool Input

  • fluidtype : Fluid Type
    • SGu : User Defined Gas Specific Gravity
    • ωu : User Defined Acentric Factor
    • Pcu : User Defined Critical Pressure
    • Tcu : User Defined Critical Temperature
  • eostype : Equation Of State
    • Zu : User Defined Compressibility Factor
  • P : Fluid Pressure
  • T : Fluid Temperature

Tool Output

  • ρ : Fluid Density
  • ω : Accentric Factor
  • Pc : Critical Point Pressure
  • Pr : Reduced Pressure
  • SG : Gas Specific Gravity Relative To Air
  • Tc : Critical Point Temperature
  • Tr : Reduced Temperature
  • Vm : Molar Volume
  • Z : Compressibility Factor
  • cvg : Convergence Check
  • mw : Fluid Molar Mass

CALCULATOR : Single Phase Gas Property [FREE]   ±

Calculate single phase gas properties for common gases: argon Ar, n-decane C10H22, ethylene C2H4, ethyl chloride C2H5Cl, ethane C2H6, propene C3H6, propane C3H8, iso-butane C4H10, n-butane C4H10, iso-pentane C5H12, n-pentane C5H12, n-hexane C6H14, n-heptane C7H16, n-octane C8H18, n-nonane C9H20, methyl chloride CH3Cl, methane CH4, chlorine Cl2, carbon monoxide CO, carbon dioxide CO2, hydrogen H2, steam H2O, hydrogen sulphide H2S, hydrogen chloride HCl, helium He, krypton Kr, nitrogen N2, air N2+O2, ammonia NH3, oxygen O2, sulphur dioxide SO2, xenon Xe.

Properties include specific heat constant pressure, specific heat constant volume, specific heat ratio, molar mass, gas constant, gas specific gravity, critical point temperature, critical point pressure, and accentric factor.

Use the Result Table option to display a table of properties versus gas type.

Tool Input

  • fluidtype : Fluid Type
    • Cpu : User Defined Specific Heat Constant Pressure
    • Cvu : User Defined Specific Heat Constant Volume
    • γu : User Defined Specific Heat Ratio
    • SGu : User Defined Specific Gravity
    • Pcu : User Defined Critical Point Pressure
    • Tcu : User Defined Critical Point Temperature
    • ωu : User Defined Accentric Factor

Tool Output

  • γ : Specific Heat Ratio
  • ω : Accentric Factor
  • Cp : Fluid Heat Capacity Constant Pressure
  • Cv : Fluid Heat Capacity Constant Volume
  • Pc : Critical Point Pressure
  • R : Gas Constant
  • SG : Gas Specific Gravity Relative To Air
  • Tc : Critical Point Temperature
  • mm : Fluid Molar Mass