1、Designation:D606411(Reapproved 2015)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 and healthpractices and determine the applicability of regulatory limita-tions prior to use.Specific hazards statements ar
6、e given in Note1.2.Referenced Documents2.1 ISO Standards:ISO 3363 Fluorochlorinated Hydrocarbons for IndustrialUse-Determination of Acidity-Titrimetric Method2ISO 3427 Gaseous Halogenated Hydrocarbons(LiquefiedGases)Taking of a Sample2ISO 5789 Fluorinated Hydrocarbons for Industrial Use-Determinatio
7、n of Nonvolatile Residue22.2 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.3.1.2 HFC-227eathecompound1,1,1,2
8、,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 thenumbering system represents one le
9、ss 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 appended letters are added to indica
10、te 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 substitution on the C1 and C3c
11、arbons 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 substitutionon Carbons C1 and
12、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,the fill density ofHFC-227ea w
13、ithin a container should not exceed that needed toachieve complete filling of the container at the maximumenvisaged storage temperature.For example,for the U.S.DOT4BA500 cylinder,the nitrogen partial pressure shall not exceed21.8 bar at 21C(316 psig at 70F)for a 1150-kg/m3(72-lb/ft3)fill density(yie
14、lding a total pressure of 25.8 bar at 21C(360psig at 70F).For this example,the safe working pressure ofthe 4BA500 cylinder is not exceeded for temperatures below54C(130F).1This specification is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agents
15、and is the directresponsibility of Subcommittee D26.09 on Fire Extinguishing Agents.Current edition approved June 1,2015.Published June 2015.Originallyapproved in 1996.Last previous edition approved in 2011 as D606411.DOI:10.1520/D6064-11R15.2Available from American National Standards Institute(ANSI
16、),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.3American Society of Refrigeration Engineers,Refrigeration Engineering 65,1957,p.49.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1.2 HFC-227ea shall conform to the requirements pre-scribed in Table 1 when tested by the appropriate test meth-od(s)listed in Section 6.4.1.3 When a material analysis is required,by agreementbetween the purchaser and the supplier,the total
