1、Designation:D1657121Manual 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
2、 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.1NOTECorrected API MPMS naming convention throughout editorially in Octobe
3、r 2012.1.Scope*1.1 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 pressur
4、es 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 measu
5、red 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 Guid
6、e 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
7、 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
8、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 t
9、he 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 wit
10、h 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 TablesD1265 Practice
11、 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 ThermometersE100 Specification for ASTM Hydromet
12、ers2.2 API Standards:3MPMS Chapter 9.1 Test Method for Density,RelativeDensity,and API Gravity of Crude Petroleum and LiquidPetroleum Products by Hydrometer Method(ASTM TestMethod D1298)1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and the API
13、Committee on PetroleumMeasurement,and is the direct responsibility of Subcommittee D02.02/COMQ,thejoint ASTM-API Committee on Hydrocarbon Measurement for Custody Transfer(Joint ASTM-API).Current edition approved June 1,2012.Published August 2012.Originallyapproved in 1939.Last previous edition appro
14、ved in 2007 as D165702(2007).DOI:10.1520/D1657-12E01.2For 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.3Available fr
15、om American Petroleum Institute(API),1220 L.St.,NW,Washington,DC 20005-4070,http:/www.api.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 States1 MPMS Chapter 11.1 Temperature a
16、nd Pressure Volume Cor-rection Factors for Generalized Crude Oils,Refined Prod-ucts and Lubricating Oils(Adjunct to ASTM D1250)MPMS Chapter 11.2.2 Compressibility Factors for Hydro-carbons:0.350-0.0637 Relative Density(60F/60F)and-50F to 140F Metering TemperatureMPMS Chapter 11.2.2M Compressibility Factors for Hydro-carbons:350-637 Kilograms per Cubic Meter Density15C and-46C to 60C Metering TemperaturesMPMS Chapter 11.2.4 Temperature Correction for the Vol-ume of NGL and LPG Tables 23E,24E,53E,