ASTM_D_6541_-_11_2015.pdf

Designation:D654111(Reapproved 2015)Standard Specification forHFC-236fa,1,1,1,3,3,3Hexafluoropropane,(CF3CH2CF3)1This standard is issued under the fixed designation D6541;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.Scope1.1 This specification covers the requirements for HFC-236fa as a fire-fighting medium.1.2 This specification does not address the fire-fightingequipment or hardware that employs HFC-236fa or the condi-tions of employing such equipment(for example,hand-helds,fixed installations,and so forth).1.3 This specification does not address the storage ortransportation of HFC-236fa.Storage,handling,and transpor-tation issues are addressed in Practice D6065.1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.5 The following safety hazards caveat pertains to the testmethods portion,Section 6,of this specification.This standarddoes not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.A specific warning statement is given in 4.3.2.Referenced Documents2.1 ASTM Standards:2D6065 Practice for Handling,Transportation,and Storage ofHFC-227ea1,1,1,2,3,3,3-Heptafluoropropane(CF3CHFCF3)D6806 Practice for Analysis of Halogenated Organic Sol-vents and Their Admixtures by Gas Chromatography2.2 ISO Standards:3ISO 3427 Gaseous Halogenated Hydrocarbons(LiquefiedGases)Taking a Sample2.3 AHRI Standard:42008Appendix C Analytical Procedures forAHRI Standard700-20062.4 U.S.Government Standards:5Code of Federal Regulations(CFR)Title 49,Part172.101 Tables of Hazardous Materials and Special Pro-visionsCode of Federal Regulations(CFR)Title 49,Part 172Subpart D Marking Requirements of Packaging for Trans-portation2.5 ASHRAE Standard:6ASHRAE Standard 34 Designation and Safety Classifica-tion of Refrigerants3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 halogenated hydrocarbon(see Note 1)saturated hy-drocarbons in which one or more of the hydrogen atoms havebeen replaced by atoms of the halogen series(fluorine,chlorine,bromine,and iodine).It is convention to prefix thenumber with an abbreviation of the compound:CFC=chlorofluorocarbonHCFC=hydrochlorofluorocarbonHFC=hydrofluorocarbonFC=fluorocarbonR=refrigerantNOTE1The halogenated compound coding terminology system pro-vides a convenient means to reference halogenated hydrocarbons(seeASRE 34).3.1.1.1 By definition,the right-most digit of the numberingsystem is the number of fluorine atoms.3.1.1.2 The second digit from the right is the number ofhydrogen atoms plus one(+1).3.1.1.3 The third digit from the right is one less(-1)than thenumber of carbon atoms in the compound(when this numberis zero,it is omitted from the number).1This specification is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agents and is the directresponsibility of Subcommittee D26.09 on Fire Extinguishing Agents.Current edition approved June 1,2015.Published June 2015.Originallyapproved in 2000.Last previous edition approved in 2011 as D654111.DOI:10.1520/D6541-11R15.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from Air-Conditioning,Heating,&Refrigeration Institute(AHRI),2111 Wilson Blvd.,Suite 500,Arlington,VA 22201,http:/www.ahrinet.org.5Available from U.S.Government Publishing Office,732 N.Capitol St.,NW,Washington,DC 20401-0001,http:/www.gpo.gov.6Available from American Society of Heating,Refrigerating,and Air-Conditioning Engineers,Inc.(ASHRAE),1791 Tullie Circle,NE,Atlanta,GA30329,http:/www.ashrae.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.1.4 Unaccounted for valance requirements are assumedto be chlorine atoms.3.1.1.5 When the compound contains bromine or iodine,thesame rules apply,except the letter B for bromine or I for iodinefollows the parent compound designated number,and thenumber of the atoms is placed after the letter.Example:CF3CH2CF35R2236fa5HFC2236fa3.1.2 HFC-236fathecompound1,1,1,3,3,3hexafluoropropane;CF3CH2CF3.4.Material Requirements4.1 Type IMixtures of HFC-236fa and Nitrogen:4.1.1 The nitrogen(N2)partial pressure shall be such thatthe safe working pressure of the receiving vessel is notexceeded.To prevent excessive