Table of Contents
3.1Introduction
3.1.1Application
3.1.2BasisforEquations
3.1.3OrganizationofPart3
3.2Symbols,Units,andTerminology
3.2.1General
3.2.2SymbolsandUnits
3.2.3Terminology
3.3FlowMeasurementEquations
3.3.1General
3.3.2EquationsforMassFlowofNaturalGas
3.3.3EquationsforVolumeFlowofNaturalGas
3.3.4VolumeConversionFromStandardtoBase
Conditions
3.4FlowEquationComponentsRequiringAdditional
Computation
3.4.1General
3.4.2DiameterRatio
3.4.3CoefficientofDischargeforFlange-Tapped
OrificeMeter
3.4.4VelocityofApproachFactor
3.4.5ReynoldsNumber
3.4.6ExpansionFactor
3.5GasProperties
3.5.1General
3.5.2PhysicalProperties
3.5.3Compressibility
3.5.4RelativeDensity
3.5.5DensityofFluidatFlowingConditions
APPENDIX3-1-ADJUSTMENTSFORINSTRUMENTCALIBRATION
APPENDIX3-B-FACTORSAPPROACH
APPENDIX3-C-FLOWCALCULATIONEXAMPLES
APPENDIX3-D-PIPETAPORIFICEMETERING
APPENDIX3-E-SICONVERSIONS
APPENDIX3-F-HEATINGVALUECALCULATION
APPENDIX3-G-DEVELOPMENTOFCONSTANTSFORFLOW
EQUATIONS Abstract
Defines practical guidelines for the measurement of natural gas. The Mass flow rate and volumetric rate methods are presented in conformance with North American industry practices.
