ASTM_D_1657_-_12_2017.pdf

Designation:D165712(Reapproved 2017)Manual of Petroleum Measurement Standards(MPMS),Chapter 9.2Standard Test Method forDensity or Relative Density of Light Hydrocarbons byPressure Hydrometer1This standard is issued under the fixed designation D1657;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.Scope1.1 This test method covers the determination of the densityor relative density of light hydrocarbons including liquefiedpetroleum gases(LPG)having Reid vapor pressures exceeding101.325 kPa(14.696 psi).1.2 The prescribed apparatus should not be used for mate-rials having vapor pressures higher than 1.4 MPa(200 psi)atthe test temperature.This pressure limit is dictated by the typeof equipment.Higher pressures can apply to other equipmentdesigns.1.3 The initial pressure hydrometer readings obtained areuncorrected hydrometer readings and not density measure-ments.Readings are measured on a hydrometer at either thereference temperature or at another convenient temperature,and readings are corrected for the meniscus effect,the thermalglass expansion effect,alternate calibration temperature effectsand to the reference temperature by means of calculations andAdjunct to D1250 Guide for Petroleum Measurement Tables(API MPMS Chapter 11.1)orAPI MPMS Chapter 11.2.4(GPATP-27),as applicable.1.4 Values determined as density or relative density can beconverted to equivalent values in the other units or alternativereference temperatures by means of Interconversion Proce-duresAPI MPMS Chapter 11.5,orAdjunct to D1250 Guide forPetroleum Measurement Tables(API MPMS Chapter 11.1)orAPI MPMS Chapter 11.2.4(GPA TP-27),as applicable.1.5 The calculations required in Section 11 shall be appliedto the initial pressure hydrometer reading with observationsand results reported as required by Section 11 prior to use in asubsequent calculation procedure(measurement ticketcalculation,meter factor calculation,or base prover volumedetermination).1.6 Annex A1 contains a procedure for verifying or certify-ing the equipment for this test method.1.7 The values in SI units are to be regarded as the standard.US Customary values shown in adjacent parentheses are forinformation only and may not be exactly equivalent.Both SIand customary units have been rounded so that they may not beexactly equivalent.1.8 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.1.9 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 by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1250 Guide for Use of the Petroleum Measurement TablesD1265 Practice for Sampling Liquefied Petroleum(LP)Gases,Manual MethodD1298 Test Method for Density,Relative Density,and APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer Method(API MPMS Chapter 9.1)E1 Specification for ASTM Liquid-in-Glass Thermometers1This 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).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 2017.Originallyapproved in 1939.Last previous edition approved in 2012 as D1657 12.DOI:10.1520/D1657-12R17.2For 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 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 issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 E100 Specification for ASTM Hydrometers2.2 API Standards:3MPMS Chapter 9.1 Test Method for Density,RelativeDensity,and