1、Designation:D 5190 01An American National StandardStandard Test Method forVapor Pressure of Petroleum Products(Automatic Method)1This standard is issued under the fixed designation D 5190;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisi
2、on,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of the totalpressure of air-containing,volatile,petroleum produc
3、ts.Thistest method is suitable for testing samples with boiling pointsabove 0C(32F)that exert a vapor pressure between 7 and172 kPa(1 and 25 psi)at 37.8C(100F)at a vapor-to-liquidratio of 4:1.This test method is suitable for testing gasolinesamples that contain oxygenates.No account is made ofdissol
4、ved water in the sample.1.1.1 Some gasoline-oxygenate blends may show a hazewhen cooled to 0 to 1C.If a haze is observed in 8.5,it shallbe indicated in the reporting of results.The precision and biasstatements for hazy samples have not been determined(seeNote 8).1.2 This test method is suitable for
5、the calculation of a dryvapor pressure equivalent(DVPE)by means of a correlationequation(see 13.1).The calculated DVPE very closely ap-proximates the dry vapor pressure that would be obtained onthe same material when tested in accordance with Test MethodD 4953.1.3 The values stated in SI units are t
6、o be regarded as thestandard.The inch-pound units given in parentheses areprovided for information only.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 hea
7、lth practices and determine the applica-bility of regulatory limitations prior to use.For specific hazardstatements,see 7.3 through 7.5 and 9.2.2.Referenced Documents2.1 ASTM Standards:D 4057 Practice for Manual Sampling of Petroleum andPetroleum Products2D 4953 Test Method for Vapor Pressure of Gas
8、oline andGasoline-Oxygenate Blends(Dry Method)2D 5191 Test Method for Vapor Pressure of Petroleum Prod-ucts(Mini Method)22.2 ASTM Adjuncts:Detailed Drawings for Automatic Vapor Pressure Instru-ment33.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 total pressure,nthe observed pre
9、ssure measured inthe experiment,that is,the sum of the partial pressure of thesample and the partial pressure of the dissolved air.3.1.2 dry vapor pressure equivalent(DVPE),na valuecalculated by a correlation equation(see 13.1)from the totalpressure.3.1.2.1 DiscussionThe DVPE is expected to be equiv
10、alentto the value obtained on the sample by Test Method D 4953,Procedure A.4.Summary of Test Method4.1 The chilled sample cup of the automatic vapor pressureinstrument is filled with chilled sample and is coupled to theinstrument inlet fitting.The sample is then automaticallyforced from the sample c
11、hamber to the expansion chamberwhere it is held until thermal equilibrium at 37.8C(100F)isreached.In this process the sample is expanded to five times itsvolume(4:1 vapor-to-liquid ratio).The vapor pressure ismeasured by a pressure transducer.4.2 The measured vapor pressure is automatically converte
12、dto a DVPE value by the instrument.A correction to this valueis necessary to account for the observed bias between the testresult and that obtained by Test Method D 4953.5.Significance and Use5.1 Vapor pressure is an important physical property ofvolatile liquids.5.2 The vapor pressure of gasoline a
13、nd gasoline-oxygenateblends is regulated by various government agencies.5.3 Specifications for volatile petroleum products generallyinclude vapor pressure limits to ensure products of suitablevolatility performance.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Product
14、s and Lubricants and is the direct responsibility of SubcommitteeD02.08 on Volatility.Current edition approved May 10,2001.Published July 2001.Originallypublished as D 5190 91.Last previous edition D 5190 99.2Annual Book of ASTM Standards,Vol 05.02.3Available from ASTM Headquarters.Order PCN 12-5001
15、4012.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.5.4 This test method is more precise than Test MethodD 4953.6.Apparatus6.1 Automatic Vapor Pressure Instrument,4the ess
16、entialfeatures describing the sample flow and operation of theautomatic vapor pressure instrument is provided in Annex A1.Critical elements of the apparatus are included as follows:6.1.1 Pressure Transducer,capable of operating in the rangefrom 0 to 172 kPa(0 to 25 psi)with the resolution of 0.1 kPa(0.01 psi)and a minimum accuracy of 60.7 kPa(60.10 psi).6.1.2 Thermostatically Controlled Heater,capable of main-taining an oil bath surrounding the test chambers at37.8 6 0.1C(100 6 0.2F)for the dura