ASTM_D_5222_-_08.pdf

Designation:D522208Standard Specification forHigh Fire-Point Mineral Electrical Insulating Oils1This standard is issued under the fixed designation D5222;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 This specification describes a high fire-point mineral oilbased insulating fluid,for use as a dielectric and coolingmedium in new and existing power and distribution electricalapparatus,such as transformers and switchgear.1.2 High fire-point insulating oil differs from conventionalmineral insulating oil by possessing a fire-point of at least300C.High fire-point mineral insulating oils are also referredto as“less flammable”mineral insulating oils.This property isnecessary in order to comply with certain application require-ments of the National Electrical Code(Article 450-23)or otheragencies.The material discussed in this specification is mis-cible with other petroleum based insulating oils.Mixing highfire-point liquids with lower fire point hydrocarbon insulatingoils(for example,Specification D3487 mineral oil)may resultin fire points of less than 300C.1.3 This specification is intended to define a high fire-pointelectrical mineral insulating oil that is compatible with typicalmaterial of construction of existing apparatus and will satis-factorily maintain its functional characteristic in its applicationin this application.The material described in this specificationmay not be miscible with electrical insulating liquids ofnon-petroleum origin.The user should contact the manufac-turer of the high fire-point insulating oil for guidance in thisrespect.1.4 This specification applies only to new insulating mate-rial oil as received prior to any processing.Information onin-service maintenance testing is available in appropriateguides.2The user should contact the manufacturers of theequipment or oil if questions of recommended characteristicsor maintenance procedures arise.2.Referenced Documents2.1 ASTM Standards:3D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD97 Test Method for Pour Point of Petroleum ProductsD117 Guide for Sampling,Test Methods,and Specificationsfor Electrical Insulating Oils of Petroleum OriginD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D611 Test Methods for Aniline Point and Mixed AnilinePoint of Petroleum Products and Hydrocarbon SolventsD664 Test Method for Acid Number of Petroleum Productsby Potentiometric TitrationD877 Test Method for Dielectric Breakdown Voltage ofInsulating Liquids Using Disk ElectrodesD878 Test Method for Inorganic Chlorides and Sulfates inInsulating OilsD923 Practices for Sampling Electrical Insulating LiquidsD924 Test Method for Dissipation Factor(or Power Factor)and Relative Permittivity(Dielectric Constant)of Electri-cal Insulating LiquidsD971 Test Method for Interfacial Tension of Oil AgainstWater by the Ring MethodD974 Test Method for Acid and Base Number by Color-Indicator TitrationD1275 Test Method for Corrosive Sulfur in Electrical Insu-lating OilsD1298 Test Method for Density,Relative Density(SpecificGravity),or API Gravity of Crude Petroleum and LiquidPetroleum Products by Hydrometer MethodD1500 Test Method for ASTM Color of Petroleum Products(ASTM Color Scale)D1524 Test Method for Visual Examination of Used Elec-trical Insulating Oils of Petroleum Origin in the Field1This specification is under the jurisdiction of ASTM Committee D27 onElectrical Insulating Liquids and Gasesand is the direct responsibility of Subcom-mittee D27.01 on Mineral.Current edition approved Jan.1,2008.Published February 2008.Originallyapproved in 1992.Last previous edition approved in 2000 as D522200.DOI:10.1520/D5222-08.2Refer to American National Standard C57.121 IEEE Guide for Acceptance andMaintenance of Less Flammable Hydrocarbon Fluid in Transformers.3For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D1533 Test Method for Water in Insulating Liquids byCoulometric Karl Fischer TitrationD1816 Test Method for Dielectric Breakdown Voltage ofInsulating Oils of Petroleum Origin Using VDE Elec-trodesD2112 Test Method for Oxidation Stability of InhibitedMineral Insulating Oil by Pressure VesselD2300 Test Method for Gassing of Electrical InsulatingLiquids Under Electrical Stress and Ionization(ModifiedPirelli Method)D2440 Test Method for Oxidation Stability of MineralInsulating OilD2668 Test Method for 2,6-di-tert-Butyl-p-Cresol and 2,6-di-tert-Butyl Phenol in E