ASTM_D_1555M_-_08e1.pdf

Designation:D1555M081Standard Test Method forCalculation of Volume and Weight of Industrial AromaticHydrocarbons and Cyclohexane Metric1This standard is issued under the fixed designation D1555M;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.1NOTEThe units statements in 1.3 and 1.3.1 were corrected editorially in May 2009.1.Scope*1.1 This standard is for use in calculating the weight andvolume of benzene,toluene,mixed xylenes,styrene,ortho-xylene,meta-xylene,para-xylene,cumene,ethylbenzene,148.9 to 176.7C and 176.7 to 204.4C aromatic hydrocarbons,and cyclohexane.Amethod is given for calculating the volumeat 15C and 20C from an observed volume at t C.Table 1lists the density in grams per cubic centimetre at 15C and20C for high purity chemicals.1.2 Calculated results shall be rounded off in accordancewith the rounding-off method of Practice E29.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3.1 A complete inch-pound unit companion standard hasbeen developed in Test Method D1555.1.4 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:2D1217 Test Method for Density and Relative Density(Spe-cific Gravity)of Liquids by Bingham PycnometerD1555 Test Method for Calculation of Volume and Weightof Industrial Aromatic Hydrocarbons and CyclohexaneD3505 Test Method for Density or Relative Density of PureLiquid ChemicalsD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 Other Documents:Patterson,J.B.,and Morris,E.C.,Metrologia,31,1994,pp.277-288TRC Thermodynamic TablesHydrocarbons,NSRDS-NIST 75-121,Supplement No.121,April 30,20013.Significance and Use3.1 This test method is suitable for use in calculatingweights and volumes of the products outlined in Section 1.Theinformation presented can be used for determining quantities ofthe above-stated aromatic hydrocarbons in tanks,shippingcontainers,etc.4.Basic Data4.1 Densities of pure materials at 15C and 20C are derivedfrom densities furnished by NSRDS-NIST 75-121(NationalStandard Reference Data SeriesNational Institute of Stan-dards and Technology).Densities of impure materials shouldbe determined by actual measurement(see Section 7).4.2 The VCF(Volume Correction Factor)equations pro-vided below are derived from the Volume Correction imple-mentation procedures presented in Method D1555-04a.4.3 The former VCF tables were based on data for com-pounds of the highest purity,but were reported to be usable formaterials in the ranges indicated in Table 2.The data support-ing this conclusion appears to be unavailable at the presenttime;however there is no reason to change this recommenda-tion.If,depending on the composition of the impurities,thereis reason to suspect that the VCF implementation procedurespresented below do not apply to a particular impure product,aseparate implementation procedure should be independentlydetermined.This may be done by measuring the density of arepresentative sample at different temperatures throughout theexpected working temperature range,regressing the data toobtain a temperature/density equation that best reproduces theobserved data,and then dividing the constants of the1This test method is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D16.01 on Benzene,Toluene,Xylenes,Cyclohexane and TheirDerivatives.Current edition approved Feb.1,2008.Published March 2008.Originallyapproved in 1993.Last previous edition approved in 2004 as D1555M 04a.DOI:10.1520/D1555M-08E01.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 temperature/density equation by the calculated density at 15Cand 20C.Alternatively,if the composition has been quantifiedone can use the VCFs of each component(if available)tocalculate a weighted average density at different temperaturesand then process the data as mentioned above.5.Volume Correction Factor Implementation Procedure5.1 The following general equation is used to