1、Designation:D548220aStandard Test Method forVapor Pressure of Petroleum Products and Liquid Fuels(Mini MethodAtmospheric)1This standard is issued under the fixed designation D5482;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the y
2、ear 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.Scope*1.1 This test method covers a procedure for the determina-tion of total vapor pressure of petroleum products and liquid
3、fuels using automatic vapor pressure instruments.The testmethod is suitable for testing samples with boiling pointsabove 0 C(32 F)that exert a vapor pressure between 7 kPaand 110 kPa(1.0 psi and 16 psi)at 37.8 C(100 F)at avapor-to-liquid ratio of 4:1.The test method is applicable togasolines contain
4、ing oxygenates.No account is made ofdissolved water in the sample.NOTE1Because the external atmospheric pressure does not influencethe resultant vapor pressure,this vapor pressure is an absolute pressure at37.8 C(100 F)in kPa(psi).This vapor pressure differs from the truevapor pressure of the sample
5、 due to some small vaporization of the sampleand dissolved air into the air of the confined space.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 samp
6、les have not been determined(see Note 6).1.2 This test method is a modification of Test MethodD5191(Mini Method)in which the test chamber is at atmo-spheric pressure prior to sample injection.1.3 This test method covers the use of automated vaporpressure instruments that perform measurements on liqu
7、idsample sizes in the range from 1 mL to 10 mL.1.4 This test method is suitable for the determination of thedry vapor pressure equivalent(DVPE)of gasoline andgasoline-oxygenate blends by means of a correlation equation(see 13.2).The calculated DVPE is considered equivalent tothe result obtained on t
8、he same material when tested by TestMethod D4953.1.5 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility
9、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 warning statements,see 7.2 through 7.7.)1.7 This international standard was developed in accor-dance with internation
10、ally 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:2D4057 Practice
11、for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4306 Practice for Aviation Fuel Sample Containers forTests Affected by Trace ContaminationD4953 Te
12、st Method for Vapor Pressure of Gasoline andGasoline-Oxygenate Blends(Dry Method)D5190 Test Method for Vapor Pressure of Petroleum Prod-ucts(Automatic Method)(Withdrawn 2012)3D5191 Test Method for Vapor Pressure of Petroleum Prod-ucts and Liquid Fuels(Mini Method)D5842 Practice for Sampling and Hand
13、ling of Fuels forVolatility MeasurementD5854 Practice for Mixing and Handling of Liquid Samplesof Petroleum and Petroleum Products3.Terminology3.1 Definitions:1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsi
14、bility ofSubcommittee D02.08 on Volatility.Current edition approved July 1,2020.Published July 2020.Originally approvedin 1993.Last previous edition approved in 2020 as D5482 20.DOI:10.1520/D5482-20A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service a
15、t serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM In
16、ternational,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.3.1.1 dry vapor pressure equivalent(DVPE),nvalue cal-culated by a defined correlation equation,
