1、Designation:D598502(Reapproved 2020)Standard Test Method forPour Point of Petroleum Products(Rotational Method)1This standard is issued under the fixed designation D5985;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of las
2、t revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis test method covers an alternative procedure for the determination of pour point of petroleumproducts using an automatic
3、apparatus.1.Scope1.1 This test method covers the determination of pour pointof petroleum products by an automatic instrument that con-tinuously rotates the test specimen against a suspended detec-tion device during cooling of the test specimen.1.2 This test method is designed to cover the range ofte
4、mperatures from 57 C to+51 C;however,the range oftemperatures included in the 1992 interlaboratory programonly covered the temperature range of 39 C to+6 C(see13.4).1.3 This test method determines the no-flow point of petro-leum products by detection of the crystal structure or viscosityincrease,or
5、both,in the sample that is sufficient to impede flowof the specimen.1.4 This test method is not intended for use with crude oils.NOTE1The applicability of this test method on residual fuel sampleshas not been verified.For further information on applicability,refer to13.4.1.5 The values stated in SI
6、units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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 envir
7、onmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 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 Standar
8、ds,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D97 Test Method for Pour Point of Petroleum ProductsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automat
9、ic Sampling of Petroleum andPetroleum Products2.2 Energy Institute Standards:3IP 15 Test Method for Pour Point of Petroleum Products3.Terminology3.1 Definitions:3.1.1 pour point,nin petroleum products,the lowesttemperature at which movement of the test specimen isobserved under prescribed conditions
10、 of test.3.2 Definitions of Terms Specific to This Standard:3.2.1 no-flow point,nin petroleum products,the tempera-ture of the test specimen at which a wax crystal structure orviscosity increase,or both,impedes movement of the surfaceof the test specimen under the conditions of the test.3.2.2 Discus
11、sionThe no-flow point occurs when,uponcooling,the formation of wax crystal structures or viscosityincrease,or both,have progressed to the point where theapplied observation device no longer detects movement underthe conditions of the test.The preceding observationtemperature,at which flow of the tes
12、t specimen is lastobserved,is 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 May 1,2020.Published June 2020.Originally
13、approved in 1996.Last previous edition approved in 2014 as D5985 02(2014).DOI:10.1520/D5985-02R20.2For 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
14、Summary page onthe ASTM website.3Available from Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.,http:/www.energyinst.org.uk.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance wi
15、th 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.3.2.3 pour point at 3 C testing intervals,ni
16、n petroleumproducts,the temperature calculated by rounding the no-flowpoint of the test specimen to the next higher integer which is amultiple of 3 C.3.2.4 DiscussionThe no-flow point can be measured witha resolution of 0.1 C in this test method.In Test Method D97observations for no-flow are in 3 C intervals and when resultswith a similar format to Test Method D97 are required,thiscalculation shall be performed.Some apparatus can performthis calculation automatically.3.2.5 rotational,nin this st