ASTM_D_8112_-_22.pdf

Designation:D811222Standard Guide forObtaining In-Service Samples of Turbine Operation RelatedLubricating Fluid1This standard is issued under the fixed designation D8112;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.INTRODUCTIONOil analysis is one of widely accepted condition monitoring techniques by the modern industry.Thistechnology,however,depends on obtaining a representative sample of the fluid from the operatingsystem.Although some information on sampling procedure for condition monitoring is provided in anumber of different standards,there is a lack of a clear reference addressing all related issues in onedocument.The intent of this standard is an attempt to provide all critical information related to fluidsampling for condition monitoring from steam and gas turbines as well as from other auxiliaryequipment in power generating industry in one document.1.Scope*1.1 This guide is applicable for collecting representativefluid samples for the effective condition monitoring of steamand gas turbine lubrication and generator cooling gas sealingsystems in the power generation industry.In addition,thisguide is also applicable for collecting representative samplesfrom power generation auxiliary equipment including hydrau-lic systems.1.2 The fluid may be used for lubrication of turbine-generator bearings and gears,for sealing generator cooling gasas well as a hydraulic fluid for the control system.The fluid istypically supplied by dedicated pumps to different points in thesystem from a common or separate reservoirs.Some largesteam turbine lubrication systems may also have a separatehigh pressure pump to allow generation of a hydrostatic fluidfilm for the most heavily loaded bearings prior to rotation.Forsome components,the lubricating fluid may be provided in theform of splashing formed by the system components movingthrough fluid surfaces at atmospheric pressure.1.3 Turbine lubrication and hydraulic systems are primarilylubricated with petroleum based fluids but occasionally alsouse synthetic fluids.1.4 For large lubrication and hydraulic turbine systems,itmay be beneficial to extract multiple samples from differentlocations for determining the condition of a specific compo-nent.1.5 The values stated in SI units are regarded as standard.1.5.1 The values given in parentheses are for informationonly.1.6 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.1.7 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:2B117 Practice for Operating Salt Spray(Fog)ApparatusD923 Practices for Sampling Electrical Insulating LiquidsD3326 Practice for Preparation of Samples for Identificationof Waterborne OilsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4289 Test Method for Elastomer Compatibility of Lubri-cating Greases and Fluids1This guide is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.C0.01 on Turbine Oil Monitoring,Problems and Systems.Current edition approved May 1,2022.Published May 2022.Originallyapproved in 2017.Last previous edition approved in 2017 as D8112 17.DOI:10.1520/D8112-22.2For 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.*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.1D4378 Practice for In-Service Monitoring of Mineral Tur-bine Oils for Steam,Gas,and Combined Cycle TurbinesD6224 Practice for In-Service Monitoring of Lubricating Oilfor Auxiliary Power Plant EquipmentD7464 Practice for Manual Sampling of Liquid Fuels,As-so