ASTM D7327-2007 Standard Specification for HFC Blend B (CH2FCF3 CHF2CF3 and CO2)《氢氟化碳(HFC)混合B(CHFCF、CHFCF和CO)的标准规范》.pdf

1、Designation: D 7327 07Standard Specification forHFC Blend B (CH2FCF3, CHF2CF3, and CO2)1This standard is issued under the fixed designation D 7327; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number

2、 in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers requirements for HFC Blend Bas a fire-fighting medium.1.2 This specification does not address the fire-fightingequ

3、ipment or hardware that employs HFC Blend B or theconditions of employing such equipment (for example, hand-helds, fixed installations, etc.).1.3 This specification does not address the storage ortransportation of HFC Blend B. Storage, handling, and trans-portation issues are addressed in Practice D

4、 7326.1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are for informa-tion only.2. Referenced Documents2.1 ASTM Standards:2D 7326 Practice for Handling, Transportation, and Storageof HFC Blend B (CH2FCF3, CHF2CF3, and CO2)D 2109 Test Methods f

5、or Nonvolatile Matter in Haloge-nated Organic Solvents and Their AdmixturesD 3401 Test Methods for Water in Halogenated OrganicSolvents and Their AdmixturesD 3444 Test Method for Total Acid Number of Trichlorot-rifluoroethaneD 6806 Practice for Analysis of Halogenated Organic Sol-vents and Their Adm

6、ixtures by Gas Chromatography2.2 ISO Standards:3ISO 3363 Fluorochlorinated Hydrocarbons for IndustrialUse-Determination of Acidity-Titrimetric MethodISO 3427 Gaseous Halogenated Hydrocarbons (LiquefiedGases)Taking of a SampleISO 5789 Fluorinated Hydrocarbons for Industrial Use-Determination of Nonvo

7、latile Residue2.3 ASHRAE Standard:4ASHRAE 34 Designation and Safety Classification of Re-frigerants2.4 U.S. Government Standards:5CFR Title 49, Part 172, Subpart D, U.S. Department ofTransportation (DOT), Marking Requirements of Packag-ing for Transportation3. Terminology3.1 Definitions of Terms Spe

8、cific to This Standard:3.1.1 HFChydrofluorocarbon; a chemical compound inwhich the compound molecule is comprised exclusively ofhydrogen, chlorine, fluorine and carbon atoms.3.1.2 HFC Blend Btertiary blend comprised of HFC-134a(1,1,1,2-tetrafluoroethane), HFC-125 (pentafluoroethane), andcarbon dioxi

9、de (CO2); a compound used to inert, extinguish, orsuppress a fire or explosion hazard.3.1.2.1 DiscussionThe terminology system for fluorine-containing compounds (described in detail in ASHRAE Stan-dard 34) provides a convenient means to reference the structureof individual compounds. By definition,

10、the first digit of thenumbering 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. Unaccounted for valence

11、require-ments are assumed to be chlorine atoms. For example, thedesignation HFC-123 indicates two carbon atoms (1 + 1), twohydrogen atoms (3-1), and four fluorine atoms (4). The “a”designation at the end of the naming convention relates to thesymmetry of the molecule.Example: CH2FCF3= HFC-134a4. Mat

12、erial Requirements4.1 The fill density of HFC Blend B within a containershould not exceed that needed to achieve complete filling of thecontainer at the maximum envisaged storage temperature. For1This specification is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fi

13、re Extinguishing Agents and is the directresponsibility of Subcommittee D26.09 on Fire Extinguishing Agents.Current edition approved April 1, 2007. Published April 2007.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annua

14、l Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute, 11 W. 42nd St., 13thFloor, New York, NY 10036.4Available from American Society of Heating, Refrigerating, and Air-Conditioning Engineers,

15、 Inc. (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA30329.5Available from Superintendent of Documents, U.S. Government PrintingOffice, Washington, DC 20036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.example, the fill density shou

16、ld not exceed 58 lb/ft3(930kg/m3) for a maximum expected temperature of 130F (54C).4.2 HFC Blend B shall conform to the requirements pre-scribed in Table 1 when tested by appropriate test methods,such as those listed in Section 2.2.4.3 When a material analysis is required, by agreementbetween the pu

17、rchaser and the supplier, the total pressure in theHFC Blend B container, the fill density of HFC Blend B withinthe container and the maximum safe storage temperature shallbe part of the material analysis (certification). The pressureshall be reported in pound-force per square inch gage (pre-ferred)

18、 or bar. The fill density shall be reported in pounds percubic foot at 70F (preferred) or kilograms per cubic meter at21C. The maximum safe storage temperature of the HFCBlend B container shall be reported in degrees Fahrenheit(preferred) or in degrees Celsius and shall conform to appli-cable regula

19、tions for the HFC Blend B container design anduse.4.4 By agreement between the purchaser and the supplier,analysis may be required and limits established for elements orcompounds not specified in Table 1.NOTE 1Prolonged exposure to concentrations of HFC Blend B inexcess of 7.5 % by volume in air dur

20、ing periods of elevated adrenalinecould produce cardiac arrhythmia in some personnel.5. Sampling5.1 Samples of HFC Blend B, taken from the liquid phase,shall be taken from filled containers in accordance with themethod specified in ISO 3427. The sampling cylinder shall becapable of safely resisting

21、the vapor pressure of the sample atthe highest temperature that could be encountered.5.2 The HFC Blend B selected in accordance with 5.1 shallbe tested for quality conformance in accordance with Table 1.The presence of one or more defects shall be cause forrejection.6. Test Methods6.1 Analysis will

22、be conducted in accordance with PracticeD 6806.6.2 Acidity analysis will be conducted in accordance withTest Methods D 3444.6.3 Water content analysis will be conducted in accordancewith Test Methods D 3401.6.4 Nonvolatile residue analysis will be conducted in accor-dance with Test Methods D 2109.6.

23、5 When liquid dispensed into a glass tube and shaken, nosediment or visible matter shall be visible.7. Container, Packaging, and Package Marking7.1 Containers used for shipping and storage of HFC BlendB conforming to this specification shall be marked in accor-dance with Code of Federal Regulations

24、(CFR) Title 49, Part172, Subpart D. The proper shipping name is “CompressedGases. N.O.S., (contains pentafluoroethane, carbon dioxide),2.2, UN1956.” In addition to DOT requirements, containersshould be marked with the following information as a mini-mum:7.1.1 Suppliers name and address,7.1.2 HFC Ble

25、nd B, and7.1.3 Statement that material conforms to SpecificationD 7327.8. Keywords8.1 HFC Blend B; CF3CFH2; HFC-134a; 1,1,1,2-tetrafluoroethane; CF3CF2H; CO2; carbon dioxide; fire sup-pressant; fire extinguishant; pentafluoroethaneASTM International takes no position respecting the validity of any p

26、atent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revisi

27、on at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your co

28、mments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrigh

29、ted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e

30、-mail); or through the ASTM website(www.astm.org).TABLE 1 RequirementsProperty RequirementPurity 99 %, mol/mol, min (exclusive of any N2present)HFC-134a Content 86 6 5 %, mol/molHFC-125 Content 9 6 3 %, mol/molCO2Content 5 6 2 %, mol/molAcidity 1.0 ppm by mass, as HCL, maxWater content 20 ppm by mass, maxNonvolatile residue 0.01 % by weight, maxSuspended matter or sediment none visibleD7327072