ASTM_D_2225_-_20.pdf

Designation:D222520Standard Test Methods forSilicone Liquids Used for Electrical Insulation1This standard is issued under the fixed designation D2225;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.Scope1.1 These test methods cover the testing of silicone liquidsfor use in transformers,capacitors,and electronic assemblies asan insulating or cooling medium,or both.These methods aregenerally suitable for specification acceptance(SpecificationD4652),factory control,referee testing,and research.1.2 Although some of the test methods listed here applyprimarily to petroleum-based fluids,they are,with minorrevisions,equally applicable to silicone liquids.1.3 Silicone liquids are used for electrical insulating pur-poses because of their stable properties at high and lowtemperatures and their relative environmental inertness.1.4 A list of the properties and standards are as follows:Property MeasuredSectionASTM Test MethodPhysical:Color6D2129Flash point7D92Fire point7D92Polychlorinated biphenylcontent8D4059Pour point9D97Refractive index10D1807Specific gravity11D1298,D1481,D4052Volatility12D4559Viscosity13D445Chemical:Acid number14D974Water content15D1533Electrical:Relative permittivity16D9242Dielectric breakdownvoltage17D8773Dielectric breakdownvoltage17D1816Dissipation factor18D9242Specific resistance19D11692Compatibility20D52821.5 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 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:4D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD97 Test Method for Pour Point of Petroleum ProductsD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D877 Test Method for Dielectric Breakdown Voltage ofInsulating Liquids Using Disk ElectrodesD923 Practices for Sampling Electrical Insulating LiquidsD924 Test Method for Dissipation Factor(or Power Factor)and Relative Permittivity(Dielectric Constant)of Electri-cal Insulating LiquidsD974 Test Method for Acid and Base Number by Color-Indicator TitrationD1169 Test Method for Specific Resistance(Resistivity)ofElectrical Insulating LiquidsD1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD1481 Test Method for Density and Relative Density(Spe-cific Gravity)of Viscous Materials by Lipkin BicapillaryPycnometerD1533 Test Method for Water in Insulating Liquids byCoulometric Karl Fischer TitrationD1807 Test Methods for Refractive Index and SpecificOptical Dispersion of Electrical Insulating Liquids(With-drawn 2014)51These test methods are under the jurisdiction of ASTM Committee D27 onElectrical Insulating Liquids and Gases and are the direct responsibility ofSubcommittee D27.02 on Gases and Non-Mineral Oil Liquids.Current edition approved Nov.1,2020.Published November 2020.Originallyapproved in 1963 as D2225 63 T.Last previous edition approved in 2012 asD2225 04(2012).DOI:10.1520/D2225-20.2Amodified cell cleaning procedure is given for Test Methods D924 and D1169.3A modified cell cleaning procedure is recommended for Test Method D877.4For 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.5The last approved version of this historical standard is referenced onwww.astm.org.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.1D1816 Test Method for Dielectric Breakdown Voltage ofInsulating Liquids Using VDE ElectrodesD2129 Test Method for Color of Clear Electrical InsulatingLiquids(Platinum-Cobalt Scale)D2864 Terminology Relating to Electrical Insulating Liq-uids and GasesD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4059