ASTM_D_7777_-_13_2018e1.pdf

Designation:D777713(Reapproved 2018)1Designation 559/12Standard Test Method forDensity,Relative Density,or API Gravity of Liquid Petroleumby Portable Digital Density Meter1This standard is issued under the fixed designation D7777;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.1NOTEThe formatting of SI units was corrected editorially in November 2018.1.Scope1.1 This test method covers the determination of the density,relative density,or API gravity of liquid petroleum productsusing portable digital density meters at test temperaturesbetween 0 C and 40 C(32 F to 104 F).Its application isrestricted to samples with a dry vapor pressure equivalent up to80 kPa(11.6 psi)and a viscosity below 100 mm2/s(cSt)at thetest temperature.1.2 This test method is suitable for determining the densityto the nearest 1 kgm3.To determine the density to the nearest0.1 kgm3,use Test Method D4052.1.3 This test method is easily calibrated and primarilysuitable for field applications.It is important for the user toknow and understand the electrical classification of the area inwhich the analyzer is to be used and to select an analyzerappropriate for that classification.1.4 Test Methods D287,D1298,and D6822 are used in fieldapplications.This test method provides an alternative fieldmethod that is easily calibrated and does not pose the hazard ofhydrometer glass breakage present in current field methods.1.5 Portable digital density meters measure the density andtemperature of the filled-in sample at the sample temperature.The measured density and temperature are automatically con-verted into:Density at 15 C/density at 60 FRelative density 15 C 15 C/relative density 60 F 60 FAPI gravity 15 C/API gravity 60 Fby the instrument using the calculation routines for Gener-alized Products as defined in Guide D1250.1.6 If the density meter does not have in-built software tocalculate the density at the reference temperature,this iscalculated from the observed density at test temperature usingthe Petroleum Measurement Tables.1.7 The accepted units of measure for density are kilogramsper cubic metre(SI unit)or grams per cubic centimetre.Valuesin SI units are to be regarded as the standard.Values inparentheses are for information only.Both SI and customaryunits have been rounded;they may not be exactly 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,health,and environmental practices and deter-mine the applicability 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:2D287 Test Method for API Gravity of Crude Petroleum andPetroleum Products(Hydrometer Method)D1193 Specification for Reagent WaterD1250 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 MethodD4052 Test Method for Density,Relative Density,and API1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.04.0D on Physical and Chemical Methods.Current edition approved Oct.1,2018.Published November 2018.Originallyapproved in 2012.Last previous edition approved in 2013 as D7777 13.DOI:10.1520/D7777-13R18E01.This standard has been developed through the cooperative effort between ASTMInternational and the Energy Institute,London.The EI and ASTM Internationallogos imply that the ASTM International and EI standards are technicallyequivalent,but does not imply that both standards are editorially identical.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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis 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 Gravity of Liquids by Digital Density MeterD4057 Practice for Manual Sampling of Petroleu