ASTM_D_1837_-_17.pdf

Designation:D183717Standard Test Method forVolatility of Liquefied Petroleum(LP)Gases1This standard is issued under the fixed designation D1837;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 a measure of the relative purity ofthe various types of liquefied petroleum(LP)gases and helpsto ensure suitable volatility performance.The test results,whenproperly related to vapor pressure and density of the product,can be used to indicate the presence of butane and heaviercomponents in propane-type LP-gas,and pentane and heaviercomponents in propane-butane and butane-type fuels.Thepresence of hydrocarbon compounds less volatile than those ofwhich the LP-gas is primarily composed is indicated by anincrease in the 95%evaporated temperature.1.2 When the type and concentration of higher boilingcomponents is required,chromatographic analysis should beused.1.3 The values stated in SI units are to be regarded as thestandard.1.3.1 ExceptionThe non-SI values are provided for infor-mation only.1.4 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 SafetyData Sheet(SDS)for details and EPAs websitehttp:/www.epa.gov/mercury/faq.htmfor additional information.Users should be aware that selling mercury and/or mercurycontaining products into your state or country may be prohib-ited by law.1.4.1 Note that thallium in a mercury-thallium thermometeris also a hazardous material.1.5 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D96 Test Method for Water and Sediment in Crude Oil byCentrifuge Method(Field Procedure)(Withdrawn 2000)3D1796 Test Method for Water and Sediment in Fuel Oils bythe Centrifuge Method(Laboratory Procedure)E1 Specification for ASTM Liquid-in-Glass Thermometers3.Summary of Test Method3.1 Refrigerate the sample by means of a cooling coil andcollect 100 mL of liquid in a weathering tube.Allow toevaporate(“weather”)at ambient pressure under specifiedconditions that approximate a single plate distillation.Measurethe observed temperature when 5 mL of liquid test portionremains.Correct this observed temperature for barometricpressure and thermometer ice point error,and report as the95%evaporation temperature.4.Significance and Use4.1 Volatility,expressed in terms of the 95%evaporatedtemperature of the product,is a measure of the amount of leastvolatile components present in the product.Coupled with avapor pressure limit,it serves to ensure essentially single-component products in the cases of commercial grades ofpropane and butane.When volatility is coupled with a vaporpressure limit which has been related to density,as in the caseof the commercial PB-mixture,the combination serves toassure essentially two component mixtures for such fuels.When coupled with a proper vapor pressure limit,this mea-surement serves to assure that special-duty propane productswill be composed chiefly of propane and propylene and thatpropane will be the major constituent.5.Apparatus5.1 Weathering TubeA centrifuge tube,cone-shaped,con-forming to the dimensions given in Fig.1 and made of1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.H0 on Liquefied Petroleum Gas.Current edition approved Jan.1,2017.Published February 2017.Originallyapproved in 1961.Last previous edition approved in 2011 as D1837 11.DOI:10.1520/D1837-17.2For 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.*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.1 thoroughly