ASTM_D_3588_-_98_2011.pdf

Designation:D358898(Reapproved 2011)Standard Practice forCalculating Heat Value,Compressibility Factor,and RelativeDensity of Gaseous Fuels1This standard is issued under the fixed designation D3588;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers procedures for calculating heatingvalue,relative density,and compressibility factor at baseconditions(14.696 psia and 60F(15.6C)for natural gasmixtures from compositional analysis.2It applies to all com-mon types of utility gaseous fuels,for example,dry natural gas,reformed gas,oil gas(both high and low Btu),propane-air,carbureted water gas,coke oven gas,and retort coal gas,forwhich suitable methods of analysis as described in Section 6are available.Calculation procedures for other base conditionsare given.1.2 The values stated in inch-pound units are to be regardedas the standard.The SI units given in parentheses are forinformation only.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3D1717 Test Method for Test for Analysis of CommericalButane-Butene Mixtures and Isolutylene by Gas Chroma-tography(Withdrawn 1984)4D1945 Test Method for Analysis of Natural Gas by GasChromatographyD1946 Practice for Analysis of Reformed Gas by GasChromatographyD2163 Test Method for Determination of Hydrocarbons inLiquefied Petroleum(LP)Gases and Propane/PropeneMixtures by Gas ChromatographyD2650 Test Method for Chemical Composition of Gases byMass Spectrometry2.2 GPA Standards:GPA 2145 Physical Constants for the Paraffin Hydrocarbonsand Other Components in Natural Gas5GPA Standard 2166 Methods of Obtaining Natural GasSamples for Analysis by Gas Chromatography5GPA 2172 Calculation of Gross Heating Value,RelativeDensity,and Compressibility Factor for Natural GasMixtures from Compositional Analysis5,6GPA Standard 2261 Method of Analysis for Natural Gas andSimilar Gaseous Mixtures by Gas Chromatography5GPA Technical Publication TP-17 Table of Physical Proper-ties of Hydrocarbons for Extended Analysis of NaturalGases5GPSA Data Book,Fig.23-2,Physical Constants52.3 TRC Document:TRC Thermodynamic TablesHydrocarbons72.4 ANSI Standard:ANSI Z 132.1-1969:Base Conditions of Pressure and Tem-perature for the Volumetric Measurement of NaturalGas8,93.Terminology3.1 Definitions:1This practice is under the jurisdiction of ASTM Committee D03 on GaseousFuels and is the direct responsibility of Subcommittee D03.03 on Determination ofHeating Value and Relative Density of Gaseous Fuels.Current edition approved Nov.1,2011.Published May 2012.Originallyapproved in 1998.Last previous edition approved in 2003 as D3588 98(2003).DOI:10.1520/D3588-98R11.2A more rigorous calculation of Z(T,P)at both base conditions and higherpressures can be made using the calculation procedures in“Compressibility andSuper Compressibility for Natural Gas and Other Hydrocarbon Gases,”AmericanGas Association Transmission Measurement Committee Report 8,AGA Cat.No.XQ1285,1985,AGA,1515 Wilson Blvd.,Arlington,VA 22209.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4The last approved version of this historical standard is referenced onwww.astm.org.5Available from Gas Processors Association(GPA),6526 E.60th St.,Tulsa,OK74145,http:/.6The sole source of supply of the program in either BASIC or FORTRANsuitable for running on computers known to the committee at this time is the GasProcessorsAssociation.If you are aware of alternative suppliers,please provide thisinformation to ASTM International Headquarters.Your comments will receivecareful consideration at a meeting of the responsible technical committee1,whichyou may attend.7Available from Thermodynamics Research Center,The TexasA&M University,College Station,TX 77843-3111.8Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.9Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D03-1007.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.1 British thermal unitthe defined International TablesBritish thermal unit(Btu).3.1.1.1 DiscussionThe defining relationships are:1 Btulb1=2.326 Jg1(exact)1 lb=453.592 37 g(exact)By these relationships,1 Btu=1 055.055 852 62 J(exact).Formost