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AS 2885.1 Pipeline Local Pressure

Calculate AS 2885.1 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.

Reference : Australian Standard AS 2885.1 : Pipelines - Gas And Liquid Petroleum Part 1 : Design And Construction (2015)

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CALCULATOR : AS 2885.1 Pipeline Local Pressure From Elevation (Dry) [FREE]   ±

Calculate AS 2885.1 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

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

Tool Output

  • ΔZlr : Local Elevation Relative To Reference Elevation
  • Pli : Internal Fluid Pressure

CALCULATOR : AS 2885.1 Pipeline Local Pressure From Elevation (Submerged) [FREE]   ±

Calculate AS 2885.1 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
    • Zl : Local Elevation
  • pletype : External Pressure Type
    • Pleu : User Defined Local External Pressure
    • ρe : External Fluid Density
    • Zs : Surface Elevation

Tool Output

  • ΔPl : Delta Pressure Across Pipe Wall
  • ΔZlr : Local Elevation Relative To Reference Elevation
  • Ple : External Fluid Pressure
  • Pli : Internal Fluid Pressure
  • wd : Water Depth

CALCULATOR : AS 2885.1 Two Phase Gas Liquid Density [FREE]   ±

Calculate AS 2885.1 pipeline fluid density for two phase gas liquid.

Fluid density can be calculated for single phase fluid, single phase gas, and two phase gas liquid. Gas oil ratio (GOR) is the ratio of gas moles over oil volume. Gas moles are commonly measured as gas volume at standard conditions (eg SCF or SCM).

Tool Input

  • mvtype : Fluid Density Type
    • GORu : User Defined Gas Oil Ratio
    • Xmu : User Defined Gas Mass Fraction
    • Xvu : User Defined Gas Volume Fraction
    • ρu : User Defined Fluid Density
  • ρl : Liquid Density
  • P : Fluid Pressure
  • T : Fluid Temperature
  • Z : Gas Compressibility Factor
  • SG : Gas Specific Gravity

Tool Output

  • ρf : Average Fluid Density
  • ρg : Gas Density (At T P)
  • GOR : Gas Oil Ratio
  • Xm : Gas Mass Fraction
  • Xv : Gas Volume Fraction (At T P)
  • vg : Gas Mole Volume (At T P)

CALCULATOR : AS 2885.1 Three Phase Black Oil Density [FREE]   ±

Calculate AS 2885.1 pipeline fluid density for three phase gas, oil and water (black oil).

Black oil is a three phase mixture of oil, water and gas. Fluid density can be calculated for single phase oil, single phase water, single phase gas, two phase oil and water, or three phase gas, oil and water. Water cut is measured relative to the total liquid volume (gas volume is ignored). Gas oil ratio (GOR) is measured relative to the oil volume at standard conditions (water volume is ignored).

Tool Input

  • mvtype : Fluid Density Type
    • GORu : User Defined Gas Oil Ratio
    • WCu : User Defined Water Cut
    • ρu : User Defined Fluid Density
  • ρo : Oil Density
  • ρw : Water Density
  • P : Fluid Pressure
  • T : Fluid Temperature
  • Z : Gas Compressibility Factor
  • SG : Gas Specific Gravity

Tool Output

  • ρf : Average Fluid Density
  • ρg : Gas Density
  • ρl : Liquid Density
  • GOR : Gas Oil Ratio
  • WC : Water Cut
  • Xmg : Gas Mass Fraction
  • Xml : Liquid Mass Fraction
  • Xmo : Oil Mass Fraction
  • Xmw : Water Mass Fraction
  • Xvg : Gas Volume Fraction
  • Xvl : Liquid Volume Fraction
  • Xvo : Oil Volume Fraction
  • Xvw : Water Volume Fraction
  • vg : Gas Mole Volume (At T P)

CALCULATOR : AS 2885.1 Single Phase Gas Density [FREE]   ±

Calculate AS 2885.1 pipeline fluid density for single phase gas.

Gas molar mass is approximately equal to the molar mass of dry air times the gas specific gravity at standard conditions (for most gases the compressibility factor Z is approximately equal to 1 at standard conditions). The molar mass of dry air is taken as 28.964 kg/kg-mole. For gas mixtures, gas specific gravity is easier to measure than the molar mass.

Tool Input

  • fluidtype : Gas Type
    • SGu : User Defined Gas Specific Gravity
  • Z : Gas Compressibility Factor
  • P : Gas Pressure
  • T : Gas Temperature

Tool Output

  • ρ : Gas Density
  • M : Gas Molar Mass
  • R : Gas Constant
  • SG : Gas Specific Gravity
  • vg : Gas Molar Volume (At T P)

CALCULATOR : AS 2885.1 Single Phase Liquid Density [FREE]   ±

Calculate AS 2885.1 pipeline fluid density for single phase liquid.

For liquids lighter than or equal to water the density can be defined as degrees API, or degrees Baume (Be-). For liquids heavier than water the density can be defined by degrees Baume (Be+), or degrees Twaddell.

Tool Input

  • sgtype : Density Type
    • SGu : User Defined Specific Gravity
    • Be+u : User Defined Degrees Baume SG > 1
    • Be-u : User Defined Degrees Baume SG <= 1
    • Twu : User Defined Degrees Twaddell SG > 1
    • APIu : User Defined Degrees API SG <= 1
    • ρu : User Defined Liquid Density

Tool Output

  • ρ : Fluid Density
  • API : Degrees API SG ≤ 1
  • Be+ : Degrees Baume SG > 1
  • Be- : Degrees Baume SG ≤ 1
  • SG : Specific Gravity
  • Tw : Degrees Twaddell SG > 1