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DNVGL ST F101 Submarine Pipeline Incidental Pressure

Calculate DNVGL-ST-F101 submarine pipeline incidental pressure from design pressure and elevation.

The reference incidental pressure (the incidental pressure at the reference elvation) is calculated from the design pressure at the reference elevation. The local incidental pressure (the incidental pressure at the local elvation) is calculated from the reference incidental pressure and the relative elevation. Use the Result Plot option to plot local pressure and reference pressure versus elevation.

Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website)

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CALCULATOR : DNVGL ST F101 Section 4.2.2 Subsea Pipeline Local Incidental Pressure And External Pressure From Elevation [FREE]   ±

Calculate subsea pipeline incidental pressure, local incidental pressure and local external pressure from design pressure and elevation (DNVGL-ST-F101 section 4.2.2). Fluid density is assumed constant.

Tool Input

  • pletype : Local External Pressure Type
    • Pleu : User Defined External Pressure At Local Elevation
  • ginctype : Incidental To Design Pressure Ratio Type
    • γincu : User Defined Incidental Pressure Factor
  • plitype : Local Incidental Pressure Type
    • Prdu : User Defined Design Pressure At Reference Elevation
    • Priu : User Defined Incidental Pressure At Reference Elevation
    • Pliu : User Defined Incidental Pressure At Local Elevation
  • ρf : Internal Fluid Density
  • ρe : External Fluid Density
  • Zr : Reference Elevation
  • Zl : Local Elevation
  • Zs : Surface Elevation

Tool Output

  • ΔPl : Delta Pressure Across Pipe Wall At Local Elevation
  • Δz : Local Elevation Relative To Reference Elevation
  • γinc : Incidental Pressure Factor
  • Ple : External Pressure At Local Elevation
  • Pli : Incidental Pressure At Local Elevation
  • Prd : Design Pressure At Reference Elevation
  • Pri : Incidental Pressure At Reference Elevation
  • wd : Water Depth

CALCULATOR : DNVGL ST F101 Two Phase Gas Liquid Density [FREE]   ±

Calculate DNVGL-ST-F101 subsea pipeline fluid density for two phase gas liquid.

Calculate the density of single phase fluid (oil or water), single phase gas, or two phase gas and 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 : DNVGL ST F101 Three Phase Black Oil Density [FREE]   ±

Calculate DNVGL-ST-F101 subsea pipeline fluid density for three phase gas, oil and water.

Calculate the density of single phase oil, single phase water, single phase gas, two phase oil and water, or three phase black oil (oil, water and gas). 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)
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