ASTM_D_56_-_05_2010.pdf

Designation:D5605(Reapproved 2010)Standard Test Method forFlash Point by Tag Closed Cup Tester1This standard is issued under the fixed designation D56;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.INTRODUCTIONTo ensure an acceptable precision,this dynamic flash point test method employs a prescribed rateof temperature rise for the material under test.The rate of heating may not in all cases give theprecision quoted in the test method because of the low thermal conductivity of certain materials.Toimprove the prediction of flammability,Test Method D3941,which utilizes a slower heating rate,wasdeveloped.Test Method D3941 provides conditions closer to equilibrium where the vapor above theliquid and the liquid are at about the same temperature.If a specification requires Test Method D56,do not change to Test Method D3941 or other test method without permission from the specifier.Flash point values are a function of the apparatus design,the condition of the apparatus used,andthe operational procedure carried out.Flash point can therefore only be defined in terms of a standardtest method,and no general valid correlation can be guaranteed between results obtained by differenttest methods,or with test apparatus different from that specified.1.Scope1.1 This test method covers the determination of the flashpoint,by tag manual and automated closed testers,of liquidswith a viscosity below 5.5 mm2/s(cSt)at 40C(104F),orbelow 9.5 mm2/s(cSt)at 25C(77F),and a flash point below93C(200F).1.1.1 For the closed-cup flash point of liquids with thefollowing properties:a viscosity of 5.5 mm2/s(cSt)or more at40C(104F);a viscosity of 9.5 mm2/s(cSt)or more at 25C(77F);a flash point of 93C(200F)or higher;a tendency toform a surface film under test conditions;or containingsuspended solids,Test Method D93 can be used.1.1.2 For cut-back asphalts refer to Test Methods D1310and D3143.NOTE1The U.S.Department of Transportation(RSTA)2and U.S.Department of Labor(OSHA)have established that liquids with a flashpoint under 37.8C(100F)are flammable as determined by this testmethod for those liquids that have a viscosity less than 5.5 mm2/s(cSt)at40C(104F)or 9.5 mm2/s(cSt)or less at 25C(77F),or do not containsuspended solids or do not have a tendency to form a surface film whileunder test.Other flash point classifications have been established by thesedepartments for liquids using this test method.1.2 This test method can be used to measure and describethe properties of materials,products,or assemblies in responseto heat and flame under controlled laboratory conditions andcannot be used to describe or appraise the fire hazard or firerisk of materials,products,or assemblies under actual fireconditions.However,results of this test method can be used aselements of fire risk assessment that takes into account all ofthe factors that are pertinent to an assessment of the fire hazardof a particular end use.1.3 Related standards are Test Methods D93,D1310,D3828,D3278,and D3941.1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.5 WARNINGMercury has been designated by manyregulatory agencies as a hazardous material that can causecentral nervous system,kidney and liver damage.Mercury,orits vapor,may be hazardous to health and corrosive tomaterials.Caution should be taken when handling mercury andmercury containing products.See the applicable product Ma-terial Safety Data Sheet(MSDS)for details and EPAswebsitehttp:/www.epa.gov/mercury/faq.htmfor addi-tional information.Users should be aware that selling mercury1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.08 on Volatility.Current edition approved Oct.1,2010.Published November 2010.Originallyapproved in 1918.Last previous edition approved in 2005 as D5605.DOI:10.1520/D0056-05R10.2For information on United States Department of Transportation regulations,seeCodes of United States Regulation 49 CFR Chapter 1 and for information on UnitedStates Department of Labor regulations,see Code of United States Regulation 29CFR Chapter XVII.Each of these items are revised annually and may be procuredfrom the Superintendent of Documents,Government Printing Office,Washington,DC 20402.*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 States1 and/or mercury containing products into your state or countrymay be prohibited by law.1.6 This standard does not purport to address all of thesafety concerns,if any