1、Designation:D682212b(Reapproved 2017)Manual of Petroleum Measurement Standards(MPMS),Chapter 9.3Standard Test Method forDensity,Relative Density,and API Gravity of CrudePetroleum and Liquid Petroleum Products byThermohydrometer Method1This standard is issued under the fixed designation D6822;the num
2、ber 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.1.Scope1.1 Thi
3、s test method covers the determination,using a glassthermohydrometer in conjunction with a series of calculations,of the density,relative density,or API gravity of crudepetroleum,petroleum products,or mixtures of petroleum andnonpetroleum products normally handled as liquids and havinga Reid vapor p
4、ressures of 101.325 kPa(14.696 psi)or less.Values are determined at existing temperatures and corrected to15 C or 60 F by means of a series of calculations andinternational standard tables.1.2 The initial thermohydrometer readings obtained areuncorrected hydrometer readings and not density measure-m
5、ents.Readings are measured on a thermohydrometer at eitherthereferencetemperatureoratanotherconvenienttemperature,and readings are corrected for the meniscus effect,the thermal glass expansion effect,alternate calibration tem-perature effects and to the reference temperature by means ofcalculations
6、and Adjunct to D1250 Guide for Use of thePetroleum Measurement Tables(API MPMS Chapter 11.1).1.3 Readings determined as density,relative density,or APIgravity can be converted to equivalent values in the other unitsor alternate reference temperatures by means of Interconver-sion Procedures(API MPMS
7、Chapter 11.5)or Adjunct toD1250 Guide for Use of the Petroleum Measurement Tables(API MPMS Chapter 11.1),or both,or tables as applicable.1.4 The initial thermohydrometer reading shall be recordedbefore performing any calculations.The calculations requiredin Section 9 shall be applied to the initial
8、thermohydrometerreading with observations and results reported as required bySection 11 prior to use in a subsequent calculation procedure(measurement ticket calculation,meter factor calculation,orbase prover volume determination).1.5 Annex A1 contains a procedure for verifying or certify-ing the eq
9、uipment of 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 forinformation only.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the use
10、r 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 standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on
11、Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1250 Guide for Use of the Petroleum Measurement TablesD1298 Test Method for Density,Relative
12、 Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD5854 Practice for Mixing and Handling of Liquid Samples1This test
13、 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 responsibility of Subcommittee D02.02/COMQ,the joint ASTM-API Committee on Hydrocarbon Measurement forCustody Transfer(Joint ASTM-A
14、PI).This test method has been approved by thesponsoring committees and accepted by the Cooperating Societies in accordancewith established procedures.Current edition approved July 15,2017.Published July 2012.Originallyapproved in 2002.Last previous edition approved in 2012 as D6822 12b.DOI:10.1520/D
15、6822-12BR17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Jointly copyrighted by ASTM International,100 Barr Har
16、bor 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 issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 of Petroleum and Petroleum ProductsD6300 Pra
