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GPA 2172:2009

GPA 2172:2009 Calculation Of Gross Heating Value, Relative Density, Compressibility And Theoretical Hydrocarbon Liquid Content For Natural Gas Mixtures For Custody Transfer Describes procedures for calculating, at base conditions from composition, the following properties of natural gas mixtures: gross heating value, relative density (real and ideal), compressibility fac

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Table of Contents

1Scope
2NormativeReferences
3TermsandDefinitions
4SymbolsandAbbreviatedTerms
5Background
5.1HeatingValue
5.2RelativeDensity
5.3CompressibilityFactor
5.4TheoreticalHydrocarbonLiquidContent
6SummaryofMethod
7EquationsforCustodyTransferCalculations
7.1GrossHeatingValue(VolumetricBasis)
7.2RelativeDensity
7.3CompressibilityFactor
7.4TheoreticalHydrocarbonLiquidContent
8ExampleCalculations
9ApplicationNotesandCautions
10PrecisionandUncertainty
AnnexA(informative)-DetailsofCalculationMethodsand
TreatmentofWater
AnnexB(informative)-CalculationofGasProperties
AnnexC(informative)-WaterContentExampleCalculations
AnnexD(informative)-CalculationofNGLEnergyContentfrom
Volume
AnnexE(informative)-DeterminationofGasEnergyContentper
UnitMass

Abstract

Describes procedures for calculating, at base conditions from composition, the following properties of natural gas mixtures: gross heating value, relative density (real and ideal), compressibility factor and theoretical hydrocarbon liquid content which in the U.S. is typically expressed as GPM, the abbreviation for gallons of liquid per thousand cubic feet of gas.

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