ASTM_D_6822_-_12b.pdf

Designation:D682212bManual 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 number 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.Scope*1.1 This 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 pressures of 101.325 kPa(14.696 psi)or less.Values are determined at existing temperatures and corrected to15C or 60F by means of a series of calculations andinternational standard tables.1.2 The initial thermohydrometer readings obtained areuncorrected hydrometer readings and not density measure-ments.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 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 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 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 equipment of this test method.1.6 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.7 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 health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1250 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 MethodD4057 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 and Petroleum ProductsD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products andLubricantsE100 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 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.Originallyapproved in 2002.Last previous edition approved in 2012 as D6822-12a.DOI:10.1520/D6822-12B.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 onthe ASTM website.*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 States1 2.2 API Standards:3MPMS Chapter 8.1 Practice for Manual Sampling of Petro-leum and Petroleum Products(ASTM Practice D4057)MPMS Chapter 8.2 Practice for Automatic Sampling ofPetroleum and Petroleum Products(ASTM PracticeD4177)MPMS Chapter 8.3 Practice for Mixing and Handling ofLiquid Samples of Petroleum and Petroleum Products(ASTM Practice D5854)MPMS Chapter 9.1 Hydrometer Test Method for Density,Relative Density or API Gravity of Crude Petroleum andLiquid Petroleum Products(ASTM Test Method D1298)MPMS Chapter 11.1 Temperature and Pressure Volume Cor-rection Factors for Generalized Crude Oils,RefinedProducts,and Lubricating Oils(Adjunct toASTM D1250)MPMS Chapter 11.5 Density/We