ASTM_D_5372_-_04_2014.pdf

Designation:D537204(Reapproved 2014)Standard Guide forEvaluation of Hydrocarbon Heat Transfer Fluids1This standard is issued under the fixed designation D5372;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.Scope21.1 This guide provides information,without specific limits,for selecting standard test methods for testing heat transferfluids for quality and aging.These test methods are consideredparticularly useful in characterizing hydrocarbon heat transferfluids in closed systems.2.Referenced Documents2.1 ASTM Standards:3D86 Test Method for Distillation of Petroleum Products atAtmospheric PressureD91 Test Method for Precipitation Number of LubricatingOilsD92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD93 Test Methods for Flash Point by Pensky-MartensClosed Cup TesterD95 Test Method for Water in Petroleum Products andBituminous Materials by DistillationD97 Test Method for Pour Point of Petroleum ProductsD189 Test Method for Conradson Carbon Residue of Petro-leum ProductsD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D471 Test Method for Rubber PropertyEffect of LiquidsD524 Test Method for Ramsbottom Carbon Residue ofPetroleum ProductsD664 Test Method for Acid Number of Petroleum Productsby Potentiometric TitrationD893 Test Method for Insolubles in Used Lubricating OilsD1160 Test Method for Distillation of Petroleum Products atReduced PressureD1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD1500 Test Method for ASTM Color of Petroleum Products(ASTM Color Scale)D2270 Practice for Calculating Viscosity Index from Kine-matic Viscosity at 40 and 100CD2717 Test Method for Thermal Conductivity of LiquidsD2766 Test Method for Specific Heat of Liquids and SolidsD2887 Test Method for Boiling Range Distribution of Pe-troleum Fractions by Gas ChromatographyD4530 Test Method for Determination of Carbon Residue(Micro Method)D6743 Test Method for Thermal Stability of Organic HeatTransfer FluidsE659 Test Method for Autoignition Temperature of LiquidChemicalsG4 Guide for Conducting Corrosion Tests in Field Applica-tions3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 heat transfer fluida petroleum oil or related hydro-carbon material which remains essentially a liquid whiletransferring heat to or from an apparatus or process.Smallpercentages of nonhydrocarbon components such as antioxi-dants and dispersants can be present.4.Significance and Use4.1 The significance of each test method will depend uponthe system in use and the purpose of the test method as listedunder Section 5.Use the most recent editions of ASTM testmethods.5.Recommended Test Procedures5.1 Pumpability of the Fluid:5.1.1 Flash Point,closed cup(Test Method D93)This testmethod will detect low flash ends which are one cause ofcavitation during pumping.In closed systems,especially whenfluids are exposed to temperatures of 225C(approximately400F)or higher,the formation of volatile hydrocarbons by1This guide is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricantsand is the direct responsibility of Subcom-mittee D02.L0.06 on Non-Lubricating Process Fluids.Current edition approved May 1,2014.Published July 2014.Originally approvedin 1993.Last previous edition approved in 2009 as D5372 04(2009).DOI:10.1520/D5372-04R14.2The background for this standard was developed by a questionnaire circulatedby ASTM-ASLE technical division L-VI-2 and reported in LubricationEngineering,Vol 32,No.8,August 1976,pp.411416.3For 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 breakdown of the oil may require venting through a pressurerelief system to prevent dangerous pressure build-up.5.1.2 Pour Point(Test Method D97)The pour point can beused as an approximate guide to the minimum temperature fornormal pumping and as a general indication of fluid type andlow temperature properties.Should a heat transfer system belikely to be subjected to low temperatures when not in use,thesystem should be trace heated to warm the fluid aboveminimum pumping temperature before start-up.5.1.3 Viscosity(Test Method D445)Fluid viscosity is ofimportance in the determination of Reynolds and Prandtlnumbers for heat transfer systems,to estimate fluid turbulence,heat transfer coefficient,and heat flow.Generally,a fluid that isabove approximately 200 centistok