ASTM_D_7873_-_22a.pdf

Designation:D787322aStandard Test Method forDetermination of Oxidation Stability and InsolublesFormation of Inhibited Turbine Oils at 120 C Without theInclusion of Water(Dry TOST Method)1This standard is issued under the fixed designation D7873;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.Scope*1.1 This test method is used to evaluate the sludgingtendencies of steam and gas turbine lubricants during theoxidation process in the presence of oxygen and metal catalyst(copper and iron)at an elevated temperature.This test methodmay be used to evaluate industrial oils(for example,circulat-ing oils and so forth).1.2 This test method is a modification of Test MethodD4310 where the sludging and corrosion tendencies of thesame kinds of oils are determined after 1000 h at 95 C in thepresence of water.Water is omitted in this modification.1.3 The values stated in SI units are to be regarded asstandard.1.3.1 ExceptionThe values in parentheses in some of thefigures are provided for information only for those using oldequipment based on non-SI units.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 deter-mine the applicability of regulatory limitations prior to use.1.5 WARNINGMercury has been designated by manyregulatory agencies as a hazardous substance that can causeserious medical issues.Mercury,or its vapor,has been dem-onstrated to be hazardous to health and corrosive to materials.Use Caution when handling mercury and mercury-containingproducts.See the applicable product Safety Data Sheet(SDS)for additional information.The potential exists that sellingmercury or mercury-containing products,or both,is prohibitedby local or national law.Users must determine legality of salesin their location.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:2A510M Specification for General Requirements for WireRods and Coarse Round Wire,Carbon Steel(Metric)(Withdrawn 2011)3B1 Specification for Hard-Drawn Copper WireD943 Test Method for Oxidation Characteristics of InhibitedMineral OilsD1193 Specification for Reagent WaterD2272 Test Method for Oxidation Stability of Steam Tur-bine Oils by Rotating Pressure VesselD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4310 Test Method for Determination of Sludging andCorrosion Tendencies of Inhibited Mineral OilsE1 Specification for ASTM Liquid-in-Glass ThermometersE230/E230M Specification for Temperature-ElectromotiveForce(emf)Tables for Standardized Thermocouples2.2 Other Standards:Specification for IP Standard Thermometers4ISO3696 WaterforAnalyticalLaboratoryUseSpecification and Test Methods53.Terminology3.1 Definitions:1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.09.0C on Oxidation of Turbine Oils.Current edition approved Nov.1,2022.Published November 2022.Originallyapproved in 2013.Last previous edition approved in 2022 as D7873 22.DOI:10.1520/D7873-22A.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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.,http:/www.energyinst.org.5Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright 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.13.1.1 See Terminology D4175 for a list of terms relating topetroleum products,liquid fuels,and lubricants.3.2 Definitions of Terms Specific to This Standard:3.2.1 sludge,na precipitate or sediment