ASTM_D_5191_-_20.pdf

Designation:D519120Standard Test Method forVapor Pressure of Petroleum Products and Liquid Fuels(Mini Method)1This standard is issued under the fixed designation D5191;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the use of automated vaporpressure instruments to determine the total vapor pressureexerted in vacuum by air-containing,volatile,liquid petroleumproducts and liquid fuels,including automotive spark-ignitionfuels with or without oxygenates and with ethanol blends up to85%(volume fraction)(see Note 1).This test method issuitable for testing samples with boiling points above 0 C(32 F)that exert a vapor pressure between 7 kPa and 130 kPa(1.0 psi and 18.6 psi)at 37.8 C(100 F)at a vapor-to-liquidratio of 4:1.Measurements are made on liquid sample sizes inthe range from 1 mL to 10 mL.No account is made fordissolved water in the sample.NOTE1The precision(see Section 16)using 1 L containers wasdetermined in a 2003 interlaboratory study(ILS);2the precision using250 mL containers was determined in a 2016 ILS.3NOTE2Samples can also be tested at other vapor-to-liquid ratios,temperatures,and pressures,but the precision and bias statements need notapply.NOTE3The ILS conducted in 1988,1991,2003,and 2016 todetermine the precision statements in Test Method D5191 did not includeany crude oil in the sample sets.Test Method D6377,as well as IP 481,have been shown to be suitable for vapor pressure measurements of crudeoils.1.1.1 Some gasoline-oxygenate blends may show a hazewhen cooled to 0 C to 1 C.If a haze is observed in 8.5,itshall be indicated in the reporting of results.The precision andbias statements for hazy samples have not been determined(see Note 15).1.2 This test method is suitable for calculation of the dryvapor pressure equivalent(DVPE)of gasoline and gasoline-oxygenate blends by means of a correlation equation(see Eq 1in 14.2).The calculated DVPE very closely approximates thedry vapor pressure that would be obtained on the same materialwhen tested by Test Method D4953.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.4 WARNINGMercury has been designated by manyregulatory agencies as a hazardous substance that can causeserious medical issues.Mercury,or its vapor,has been dem-onstrated to be hazardous to health and corrosive to materials.Use Caution when handling mercury and mercury-containingproducts.See the applicable product Safety Data Sheet(SDS)for additional information.The potential exists that sellingmercury or mercury-containing products,or both,is prohibitedby local or national law.Users must determine legality of salesin their location.1.5 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific safety warning statements,see 7.2 through 7.8.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:4D2892 Test Method for Distillation of Crude Petroleum(15-Theoretical Plate Column)D4057 Practice for Manual Sampling of Petroleum andPetroleum Products1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.08 on Volatility.Current edition approved May 1,2020.Published May 2020.Originallyapproved in 1991.Last previous edition approved in 2019 as D5191 19.DOI:10.1520/D5191-20.2Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D02-1619.ContactASTM CustomerService at serviceastm.org.3Research Report IP394(EN 13016-1)and IP619(EN 13016-3)2016,availablefrom the Energy Institute,61 New Cavendish Street,London W1G 7AR,UK,email:ILSenergyinst.org.4For 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