1、Designation:D129812b(Reapproved 2017)Manual of Petroleum Measurement Standards(MPMS),Chapter 9.1Standard Test Method forDensity,Relative Density,or API Gravity of Crude Petroleumand Liquid Petroleum Products by Hydrometer Method1This standard is issued under the fixed designation D1298;the number im
2、mediately 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 be
3、en approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers the laboratory determinationusing a glass hydrometer in conjunction with a series ofcalculations,of the density,relative density,or API gravity ofcrude petroleum,petroleum products,or mixtures of petr
4、oleumand nonpetroleum products normally handled as liquids,andhaving a Reid vapor pressure of 101.325 kPa(14.696 psi)orless.Values are determined at existing temperatures andcorrected to 15 C or 60 F by means of a series of calculationsand international standard tables.1.2 The initial hydrometer rea
5、dings obtained are uncor-rected hydrometer readings and not density measurements.Readings are measured on a hydrometer at either the referencetemperature or at another convenient temperature,and readingsare corrected for the meniscus effect,the thermal glass expan-sion effect,alternative calibration
6、 temperature effects and to thereference temperature by means of the Petroleum MeasurementTables;values obtained at other than the reference temperaturebeing hydrometer readings and not density measurements.1.3 Readings determined as density,relative density,or APIgravity can be converted to equival
7、ent values in the other unitsor alternative reference temperatures by means of Interconver-sion Procedures(API MPMS Chapter 11.5),or Adjunct toD1250 Guide for Petroleum Measurement Tables(API MPMSChapter 11.1),or both,or tables,as applicable.1.4 The initial hydrometer readings determined in the labo
8、-ratory shall be recorded before performing any calculations.The calculations required in Section 10 shall be applied to theinitial hydrometer reading with observations and results re-ported as required by Section 11 prior to use in a subsequentcalculation procedure(ticket calculation,meter factorca
9、lculation,or base prover volume determination).1.5 Annex A1 contains a procedure for verifying or certify-ing the equipment for this test method.1.6 The values stated in SI units are to be regarded asstandard.1.6.1 ExceptionThe values given in parentheses are pro-vided for information only.1.7 This
10、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.1.8 This international stan
11、dard 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 by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Refer
12、enced Documents2.1 ASTM Standards:2D1250 Guide for Use of the Petroleum Measurement TablesD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD5854 Practice for Mixing and Handling of Liquid Samplesof Petroleum
13、and Petroleum ProductsE1 Specification for ASTM Liquid-in-Glass ThermometersE100 Specification for ASTM Hydrometers1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and the API Committee onPetroleum Measurement,and is the direct respon
14、sibility of Subcommittee D02.02/COMQ,the joint ASTM-API Committee on Hydrocarbon Measurement forCustody Transfer(Joint ASTM-API).This test method has been approved by thesponsoring committees and accepted by the Cooperating Societies in accordancewith established procedures.Current edition approved
15、July 15,2017.Published July 2017.Originallyapproved in 1953.Last previous edition approved in 2012 as D1298 12b.DOI:10.1520/D1298-12BR17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume infor
16、mation,refer to the standards Document Summary page onthe ASTM website.Jointly copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,USA and the American Petroleum Institute(API),1220 L Street NW,Washington DC 20005,USAThis 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 is
