1、Designation:D606411(Reapproved 2022)Standard Specification forHFC-227ea,1,1,1,2,3,3,3-Heptafluoropropane(CF3CHFCF3)1This standard is issued under the fixed designation D6064;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、 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 requirements for HFC-227eaas a fire-fighting medium.1.2 This specification does not address the
3、fire-fightingequipment or hardware that employs HFC-227ea or the con-ditions of employing such equipment(for example,handhelds,fixed installations,etc.).1.3 This specification does not address the storage ortransportation of HFC-227ea.Storage,handling,and transpor-tation issues may be addressed in f
4、uture ASTM specifications.1.4 The values stated in both inch-pound and SI units are tobe regarded separately as the standard.The values given inparentheses are for information only.1.5 The following safety hazards caveat pertains only to thetest methods portion,Section 5,of this specification:Thisst
5、andard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety,health,andenvironmental practices and determine the applicability ofregulatory limitations prior to use.Specific hazards s
6、tatementsare given in Note 1.1.6 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 Organ
7、ization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ISO Standards:2ISO 3363 Fluorochlorinated Hydrocarbons for IndustrialUse-Determination of Acidity-Titrimetric MethodISO 3427 Gaseous Halogenated Hydrocarbons(LiquefiedGases)Taking of a SampleISO 5789 Fluorinated Hydrocarbons
8、for Industrial Use-Determination of Nonvolatile Residue2.2 ASRE Standard:ASRE Standard 3433.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 HFChydrofluorocarbon;a chemical compound inwhich the compound molecule is comprised exclusively ofhydrogen and fluorine and carbon atoms.3.1
9、.2 HFC-227eathecompound1,1,1,2,3,3,3-heptafluoropropane;CF3CHFCF3.3.1.2.1 DiscussionThe terminology system for fluorine-containing compounds(described in detail in ASRE Stan-dard 34)provides a convenient means to reference the structureof individual compounds.By definition,the first digit of thenumb
10、ering system represents one less than the number ofcarbon atoms in the compound molecule;the second digit,onemore than the number of hydrogen atoms in the compoundmolecule;and the third digit,the number of fluorine atoms inthe compound molecule.For molecules containing three car-bon atoms,two append
11、ed letters are added to indicate thesymmetry of the molecule.The first appended letter indicatesthe substitution on the central(C2)carbon;for example,thesubstitution CHF is assigned the designation“e.”The secondappended letter indicates the substitution at the C1 and C3carbons;for example,identical
12、substitution on the C1 and C3carbons are assigned the designation“a.”For example,thedesignation HFC-227ea indicates three carbon atoms(2+1),one hydrogen atom(21),and seven fluorine atoms;thedesignation“e”indicates that the central carbon is substitutedas CHF,and the designation“a”indicates that the
13、substitutionon Carbons C1 and C3 is identical,that is,the structure isCF3CHFCF3.4.Material Requirements4.1 Type IMixtures of HFC-227ea 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 pressure,
14、the fill density of1This 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 Nov.1,2022.Published November 2022.Original
15、lyapproved in 1996.Last previous edition approved in 2015 as D606411(2015).DOI:10.1520/D6064-11R22.2Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.3American Society of Refrigeration Engineers,Refrigeration Engineering 65,1957,p
16、.49.Copyright 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.1HFC-227ea within a container should not exceed that needed toachieve comp
