ASTM_D_5853_-_11.pdf

Designation:D585311Designation:441/99Standard Test Method forPour Point of Crude Oils1This standard is issued under the fixed designation D5853;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 two procedures for the deter-mination of the pour point temperatures of crude oils down to36C.Procedure A provides a measure of the maximum(upper)pour point temperature and is described in 9.1.Proce-dure B provides a measure of the minimum(lower)pour pointtemperature and is described in 9.2.1.2 The use of this test method is limited to use for crudeoils.Pour point temperatures of other petroleum products canbe determined by Test Method D97.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 WARNINGMercury has been designated by manyregulatory agencies as a hazardous material that can causecentral nervous system,kidney and liver damage.Mercury,orits vapor,may be hazardous to health and corrosive tomaterials.Caution should be taken when handling mercury andmercury containing products.See the applicable product Ma-terial Safety Data Sheet(MSDS)for details and EPAswebsitehttp:/www.epa.gov/mercury/faq.htmfor addi-tional information.Users should be aware that selling mercuryand/or mercury containing products into your state or countrymay be prohibited by law.1.5 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.For specific hazardstatements,see Section 7.2.Referenced Documents2.1 ASTM Standards:2D97 Test Method for Pour Point of Petroleum ProductsD130 Test Method for Corrosiveness to Copper from Petro-leum Products by Copper Strip TestD323 Test Method for Vapor Pressure of Petroleum Products(Reid Method)D4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsE1 Specification for ASTM Liquid-in-Glass ThermometersE77 Test Method for Inspection and Verification of Ther-mometers3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 maximum(upper)pour point,nthe pour point ob-tained after the test specimen has been subjected to a pre-scribed treatment designed to enhance gelation of wax crystalsand solidification of the test specimen.3.1.2 minimum(lower)pour point,nthe pour point ob-tained after the test specimen has been subjected to a pre-scribed treatment designed to delay gelation of wax crystalsand solidification of the test specimen.3.1.3 pour point,nthe lowest temperature at which move-ment of the test specimen is observed under the conditions ofthe test.4.Summary of Test Method4.1 After preliminary heating,the test specimen is cooled ata specified rate and examined at intervals of 3C for flowcharacteristics.The lowest temperature at which movement ofthe test specimen is observed is recorded as the pour point.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.07 on Flow Properties.Current edition approved June 1,2011.Published July 2011.Originally approvedin 1995.Last previous edition approved in 2009 as D585309.DOI:10.1520/D5853-11.2For 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 5.Significance and Use5.1 The pour point of a crude oil is an index of the lowesttemperature of handleability for certain applications.5.2 This is the only pour point method specifically designedfor crude oils.5.3 The maximum and minimum pour point temperaturesprovide a temperature window where a crude oil,depending onits thermal history,might appear in the liquid as well as thesolid state.5.4 The test method can be used to supplement othermeasurements of cold flow behavior.It is especially useful forthe screening of the effect of wax interaction modifiers on theflow behavior of crude oils.6.Apparatus6.1 Pour Point Test Apparatus Assembly(see Fig.1):6.1.1 Test Jar,cylindrical,of clear glass,flat bottomed,outside diameter 33.2 to 34.8 mm,and height 115 to 125 mm.The inside diameter of the jar can range from 30.0 to 32.4 mm,within the constraint that the wall thickness shall be no greaterthan 1.6 mm.The jar sha