1、Designation:D28712bStandard Test Method forAPI Gravity of Crude Petroleum and Petroleum Products(Hydrometer Method)1This standard is issued under the fixed designation D287;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、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 determina
3、tion by means ofa glass hydrometer in conjunction with a series of calculationsof the API gravity of crude petroleum and petroleum productsnormally handled as liquids and having a Reid vapor pressure(Test Method D323)of 101.325 kPa(14.696 psi)or less.Gravities are determined at 60F(15.56C),or conver
4、ted tovalues at 60F,by means of Adjunct to D1250 Guide forPetroleum Measurement Tables(API MPMS Chapter 11.1).These tables are not applicable to nonhydrocarbons or essen-tially pure hydrocarbons such as the aromatics.1.2 The initial values obtained are uncorrected hydrometerreadings and not density
5、measurements.Values are measuredon a hydrometer at either the reference temperature or atanother convenient temperature,and readings corrected for themeniscus effect,the thermal glass expansion effect,alternatecalibration temperature effects and to the reference temperatureby means of volume correct
6、ion tables.1.3 The hydrometer readings determined shall be recordedbefore performing any calculations.Then the calculationsrequired in Section 9 shall be performed and documentedbefore using the final result in a subsequent calculationprocedure(measurement ticket calculation,meter factorcalculation,
7、or base prover volume determination).1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all
8、 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 specificwarning statement,see 8.3.2.Referenced Documents2.1 AST
9、M Standards:2D323 Test Method for Vapor Pressure of Petroleum Products(Reid Method)D1250 Guide for Use of the Petroleum Measurement TablesD1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD6822 Test Method for Density,R
10、elative Density,and APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Thermohydrometer MethodE1 Specification for ASTM Liquid-in-Glass ThermometersE100 Specification for ASTM Hydrometers2.2 EI Standards:3Specifications for IP Standard ThermometersIP Specifications for Petroleum Hydrome
11、ters2.3 API Standards:4MPMS Chapter 9.1 Test Method for Density,RelativeDensity,or API Gravity of Crude Petroleum and LiquidPetroleum Products by Hydrometer Method(ASTM TestMethod D1298)MPMS Chapter 9.3 Test Method for Density,RelativeDensity,and API Gravity of Crude Petroleum and LiquidPetroleum Pr
12、oducts by Thermohydrometer Method(ASTM Test Method D6822)MPMS Chapter 11.1 Temperature and Pressure Volume Cor-rection Factors for Generalized Crude Oils,RefinedProducts,and Lubricating Oils(Adjunct toASTM D1250)1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,L
13、iquid Fuels,and Lubricants and the API Committee onPetroleum Measurement,and is the direct responsibility of Subcommittee D02.02/COMQ,the joint ASTM-API Committee on Hydrocarbon Measurement forCustody Transfer(Joint ASTM-API).Current edition approved June 1,2012.Published October 2012.Originallyappr
14、oved in 1928.Last previous edition approved in 2012 as D28712a.DOI:10.1520/D0287-12B.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
15、onthe ASTM website.3Available from Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.,http:/www.energyinst.org.4Available from American Petroleum Institute(API),1220 L.St.,NW,Washington,DC 20005-4070,http:/www.api.org.*A Summary of Changes section appears at the end of this standardCopyright
16、ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.4 ASTM Adjuncts:Adjunct to D1250 Guide for Petroleum Measurement Tables(API MPMS Chapter 11.1)53.Terminology3.1 Definitions:3.1.1 API gravity,na special function of relative density60/60F(15.56/15.56C),represented by:API5141.5/relative density 60/60F!#2 131.5(1)No statement of reference temperature is required,since60F is included in the definition.3.1.2 hydrometer reading,nthe point on the hydr