1、Designation:D555195(Reapproved 2019)Standard Test Method forDetermination of the Cloud Point of Oil1This standard is issued under the fixed designation D5551;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A
2、 number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the cloudpoint of oils used in the softening and stuffing of leather and inthe manufacture of
3、 fat liquors and other softening and stuffingcompounds.This test method was derived from Test MethodsD97 and D2500.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafet
4、y 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.1.4 This international standard was developed in accor-dance with
5、 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:2D97
6、 Test Method for Pour Point of Petroleum ProductsD2500 Test Method for Cloud Point of Petroleum Productsand Liquid FuelsE1 Specification for ASTM Liquid-in-Glass Thermometers3.Terminology3.1 cloud pointthat temperature,expressed as a multipleof 1C(2F),at which a cloud or haze of wax crystals appears
7、at the bottom of the test jar when the oil is cooled underprescribed conditions.4.Significance and Use4.1 This test method is intended to determine the cloudpoint of oils used in the softening and stuffing of leather,aswell as those used in the manufacture of products for suchpurpose.The cloud point
8、 of oils is measured for the purpose ofquality assurance.5.Apparatus5.1 Test Jar,clear cylindrical glass,flat bottom,30-to33.5-mm inside diameter,and 115-to 125-mm height.Toindicate sample height the jar should be marked with a line 546 3 mm above the inside bottom.5.2 Thermometers,having ranges sho
9、wn below and con-forming to the requirements prescribed in Specification E1 forthermometers:ThermometerTemperatureNumberThermometerRangeASTMIPHigh cloud and pour38 to+50C5C1CLow cloud and pour80 to+20C6C2CMelting point+32 to+127C61C63C5.2.1 Since separation of liquid column thermometers occa-sionall
10、y occurs and may escape detection,thermometersshould be checked immediately prior to the test and used onlyif they prove accurate within 6 1C(for example,ice point).5.3 Cork,to fit the test jar,bored centrally for the testthermometer.5.4 Jacket,metal or glass,watertight,cylindrical,flatbottom,115 mm
11、 in depth,42-to 50-mm inside diameter.Itmust be supported firmly in a vertical position in the coolingbath of 5.7 so that not more than 25 mm projects out of thecooling medium.5.5 Disk,cork or felt,6 mm thick,to fit loosely inside thejacket.5.6 Gasket,to fit snugly around the outside of the test jar
12、and loosely inside the jacket.The gasket may be made ofrubber,leather,or other material that is elastic enough to clingto the test jar and hard enough to hold its shape.Its purpose isto prevent the test jar from touching the jacket.5.7 Bath or Baths,maintained at prescribed temperatureswith a firm s
13、upport to hold the jacket vertical.The requiredbath temperatures may be obtained by refrigeration if1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.08 on Fats and Oils.This testmethod was developed in cooperation with t
14、he American Leather Chemists Assn.(Method H 18-1957).Current edition approved April 1,2019.Published April 2019.Originallyapproved in 1994.Last previous edition approved in 2012 as D5551 95(2012).DOI:10.1520/D5551-95R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact AST
15、M 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 develo
16、ped 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 available,otherwise by suitable freezing mixtures.Freezingmixtures commonly used for temperatures down to thoseshown are as follows:For Tempera-tures DownIce and water9CCrushed ice and sodium chloride crystals12CCrushed ic
