1、Designation:D5002181Standard Test Method forDensity,Relative Density,and API Gravity of Crude Oils byDigital Density Analyzer1This standard is issued under the fixed designation D5002;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,t
2、he 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.1NOTESubsection 10.2.11 was corrected editorially in April 2019.1.Scope*1.1 This test method covers the determination of th
3、e density,relative density,and API gravity of crude oils that can behandled in a normal fashion as liquids at test temperaturesbetween 15 C and 35 C utilizing either manual or automatedsample injection equipment.This test method applies to crudeoils with high vapor pressures provided appropriate pre
4、cau-tions are taken to prevent vapor loss during transfer of thesample to the density analyzer.1.2 This test method was evaluated in round robin testingusing crude oils in the 0.75 g mL to 0.95 g mL range.Lightercrude oil can require special handling to prevent vapor losses.Heavier crudes can requir
5、e measurements at higher tempera-tures to eliminate air bubbles in the sample.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.The accepted units of measurement of density aregrams per millilitre and kilograms per cubic metre.
6、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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Spec
7、ific warning statements are given in 7.4,7.5,and 7.6.1.5 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
8、by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D287 Test Method for API Gravity of Crude Petroleum andPetroleum Products(Hydrometer Method)D941 Test Method for Density and Relative Density(Spe-cific Gravity)of Liquids by Lipkin Bica
9、pillary Pycnom-eter(Withdrawn 1993)3D1193 Specification for Reagent WaterD1217 Test Method for Density and Relative Density(Spe-cific Gravity)of Liquids by Bingham PycnometerD1250 Guide for Use of the Petroleum Measurement TablesD1298 Test Method for Density,Relative Density,or APIGravity of Crude P
10、etroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4
11、377 Test Method for Water in Crude Oils by Potentiomet-ric Karl Fischer Titration3.Terminology3.1 Definitions:3.1.1 density,nmass per unit volume at a specified tem-perature.3.1.1.1 DiscussionThe SI unit of density is kg/m3;the unitof measure g/cm3is commonly used in industry.Less preferredunits,for
12、 example,kg/L or g/mL,are still in use.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0D on Physical and Chemical Methods.Current edition approved Dec.1,2018.Published February
13、2019.Originallyapproved in 1989.Last previous edition approved in 2016 as D5002 16.DOI:10.1520/D5002-18E01.2For 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
14、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 International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesTh
15、is 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(TB
16、T)Committee.1 3.1.2 relative density,nthe ratio of the density of amaterial at a stated temperature to the density of water at astated temperature.3.1.2.1 DiscussionRelative density is also commonlyknown as specific gravity.Commonly used stated temperaturesare 20 C20 C,15 C 15 C,20 C 4 C and 60 F60 F.“Relative density”was historically known as the deprecatedterm“specific gravity”.3.2 Definitions of Terms Specific to This Standard:3.2.1 API gravity,na special function of relative density60 F 60 F
