1、Designation:D577121Designation:IP 44409Standard Test Method forCloud Point of Petroleum Products and Liquid Fuels(Optical Detection Stepped Cooling Method)1This standard is issued under the fixed designation D5771;the number immediately following the designation indicates the year oforiginal adoptio
2、n 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.INTRODUCTIONThis test method describes an alternative procedure for the determination of clou
3、d point ofpetroleum products Test Method D2500/IP 219 using an automatic apparatus.The temperature resultsfrom this test method have been found to be equivalent to Test Method D2500/IP 219.Whenspecification requires Test Method D2500/IP 219,do not substitute this test method or any othermethod witho
4、ut obtaining comparative data and agreement from the specifier.1.Scope*1.1 This test method covers the description of the determi-nation of the cloud point of petroleum products and biodieselfuels that are transparent in layers 40 mm in thickness,by anautomatic instrument using an optical device.1.2
5、 This test method covers the range of temperaturesfrom 60 C to+49 C with temperature resolution of 0.1 C,however,the range of temperatures included in the 1997interlaboratory cooperative test program only covered thetemperature range of 56 C to+34 C.1.3 The values stated in SI units are to be regard
6、ed asstandard.No other units of measurement are included in thisstandard.1.4 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
7、 deter-mine the applicability of regulatory limitations prior to use.1.5 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-me
8、ndations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D2500 Test Method for Cloud Point of Petroleum Productsand Liquid FuelsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic
9、Sampling of Petroleum andPetroleum ProductsD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a MaterialD6751 Specification for Biodiesel Fuel Blend Stock(B100)for Middle Distillate Fuels2.2 Energy Insti
10、tute Standard:3IP 219 Test Method for Cloud Point of Petroleum Products32.3 Other Standard:4IEC 751 Industrial Platinum Resistance Thermometer Sen-sors3.Terminology3.1 Definitions:3.1.1 biodiesel,nfuel comprised of mono-alkyl esters oflong chain fatty acids derived from vegetable oils or animalfats,
11、designated B100.1This 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 Jan.1,2021.Published January 2021.Originallyapproved in 1995.Last prev
12、ious edition approved in 2020 as D5771 20.DOI:10.1520/D5771-21.2For 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.3Av
13、ailable from Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.,http:/www.energyinst.org.uk.4Available from International Electrotechnical Commission(IEC),3 rue deVaremb,Case postale 131,CH-1211,Geneva 20,Switzerland,http:/www.iec.ch.*A Summary of Changes section appears at the end of this st
14、andardCopyright 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 Inte
15、rnational Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.13.1.1.1 DiscussionBiodiesel is typically produced by areaction of vegetable oil or animal fat with an alcohol such asmethanol or ethanol in the presence of a catalyst to y
16、ieldmono-alkyl esters and glycerin,which is removed.The finishedbiodiesel derives approximately 10%of its mass from thereacted alcohol.The alcohol used in the reaction may or maynot come from renewable resources.3.1.2 biodiesel blend(BXX),na homogeneous mixture ofhydrocarbon oils and mono-alkyl esters of long chain fattyacids.3.1.2.1 DiscussionIn the abbreviation,BXX,the XX rep-resents the volume percentage of biodiesel fuel in the blend.3.1.2.2 DiscussionThe mono-alkyl esters of long chainfatty