ASTM_D_5191_-_15.pdf

Designation:D519115Standard Test Method forVapor Pressure of Petroleum Products(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,including automotive spark-ignition fuels with orwithout oxygenates(see Note 1).This test method is suitablefor testing samples with boiling points above 0 C(32 F)thatexert a vapor pressure between 7 kPa and 130 kPa(1.0 psi and18.6 psi)at 37.8 C(100 F)at a vapor-to-liquid ratio of 4:1.Measurements are made on liquid sample sizes in the rangefrom 1 mL to 10 mL.No account is made for dissolved waterin the sample.NOTE1An interlaboratory study was conducted in 2008 involving 11different laboratories submitting 15 data sets and 15 different samples ofethanol-fuel blends containing 25 volume%,50 volume%,and 75volume%ethanol.The results indicated that the repeatability limits ofthese samples are with in the published repeatability of this test method.on this basis,it can be concluded that D5191 is applicable to ethanol-fuelblends such as Ed75 and Ed85(Specification D5798)and other ethanol-fuel blends with greater than 10 v%ethanol.See ASTM RR:D021694filed with ASTM for supporting data.2NOTE2Samples can also be tested at other vapor-to-liquid ratios,temperatures,and pressures,but the precision and bias statements need notapply.NOTE3The interlaboratory studies conducted in 1988,1991,and2003 to determine the precision statements in Test Method D5191 did notinclude any crude oil in the sample sets.Test Method D6377,as well asIP 481,have been shown to be suitable for vapor pressure measurementsof crude oils.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 regarded as standard.The inch-pound units given in parentheses are provided forinformation only.1.4 WARNINGMercury has been designated by manyregulatory agencies as a hazardous material that can causecentral nervous system,kidney and liver damage.Mercury,orits vapor,may be hazardous to health and corrosive tomaterials.Caution should be taken when handling mercury andmercury containing products.See the applicable product Ma-terial Safety Data Sheet(MSDS)for details and EPAs website http:/www.epa.gov/mercury/faq.htm-for additional infor-mation.Users should be aware that selling mercury and/ormercury containing products into your state or country may beprohibited by law.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 and health practices and determine the applica-bility of regulatory limitations prior to use.For specific safetywarning statements,see 7.2 through 7.8.2.Referenced Documents2.1 ASTM Standards:3D2892 Test Method for Distillation of Crude Petroleum(15-Theoretical Plate Column)D4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4953 Test Method for Vapor Pressure of Gasoline andGasoline-Oxygenate Blends(Dry Method)D5798 Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition EnginesD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate Analytical1This 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 Oct.1,2015.Published October 2015.Originallyapproved in 1991.Last previous edition approved in 2013 as D5191 13.DOI:10.1520/D5191-15.2Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D02-1694.3For 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.*A Summary of Changes section appears at th