1、Designation: D7673/D7673M 15Standard Specification forHalon 1211, Bromochlorodifluoromethane (CF2BrCl)1This standard is issued under the fixed designation D7673/D7673M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the requirements for Halon1211 as a fire-fighting medium.1.2 This specification does not addre
3、ss the fire-fightingequipment or hardware that employs Halon 1211 or theconditions of employing such equipment (for example,handhelds, fixed installations, etc.).1.3 This specification does not address the storage ortransportation of Halon 1211. Storage, handling, and transpor-tation issues may be a
4、ddressed in future ASTM standards.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems
5、may result in non-conformancewith the standard.1.5 The following safety hazards caveat pertains only to thetest methods portion, Section 6, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the user
6、of this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use. Specific hazards statements are given inSection 4.2. Referenced Documents2.1 ASTM Standards:2D2108 Test Method for Color of Halogenated OrganicSolvents and Th
7、eir Admixtures (Platinum-Cobalt Scale)D7815 Practice for Handling, Transportation, and Storage ofHalon 1211, Bromochlorodifluoromethane (CF2BrCl)2.2 AHRI Standards:32008 Appendix C for Analytical Procedures for AHRI Stan-dard 700-20122.3 ISO Standards:4ISO 3427 Gaseous Halogenated Hydrocarbons (Liqu
8、efiedGases) Taking of a Sample2.4 U.S. Governmental Standards:5CFR Title 49, Part 172.101 Tables of Hazardous Materialsand Special ProvisionsCFR Title 49, Part 172 Subpart D Marking Requirements ofPackaging for Transportation3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 Halo
9、n 1211the halogenated hydrocarbon compoundBromochlorodifluoromethane used as a fire extinguishing me-dium.3.1.1.1 DiscussionThe halon terminology system pro-vides a convenient means to reference halogenated hydrocar-bon fire extinguishants. Halogenated hydrocarbons are acyclicsaturated hydrocarbons
10、in which one or more of the hydrogenatoms have been replaced by atoms from the halogen series(that is, fluorine, chlorine, bromine, and iodine). By definition,the first digit of the halon numbering system represents thenumber of carbon atoms in the compound molecule; the seconddigit, the number of f
11、luorine atoms; the third digit, the numberof chlorine atoms; the fourth digit, the number of bromineatoms; and the fifth digit, the number of iodine atoms. Trailingzeros are not expressed. Unaccounted for valence requirementsare assumed to be hydrogen atoms.number of hydrogen atoms5 (1)number of car
12、bon atoms 32!12! 2 sum of halogen atoms!#For example, (2)bromochlorodifluoromethane 2 CF2BrCl 2 Halon 12111This 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 E
13、xtinguishing Agents.Current edition approved Jan. 1, 2015. Published February 2015. Originallyapproved in 2010. Last previous edition approved in 2010 as D7673/D7673M 102.DOI: 10.1520/D7673_D7673M-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Servic
14、e at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Air-Conditioning, Heating, and Refrigeration Institute (AHRI),2111 Wilson Blvd., Suite 500, Arlington, VA 22201, http:/www.ari.org.4Available fro
15、m American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.5Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.Copyright ASTM Internati
16、onal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.2 non-condensable gasesnon-condensable gases con-sist primarily of air (nitrogen, oxygen) accumulated in thevapor phase of a liquefied compressed gas where the solubilityof air in the liquid phase is extrem
17、ely low and air is notsignificant as a liquid phase contaminant. Non-condensablegases are in some instances termed non-absorbable gases.4. Material Requirements4.1 Type IMixtures of Halon 1211 and Nitrogen:4.1.1 The nitrogen (N2) partial pressure shall be such thatthe safe working pressure of the re
18、ceiving vessel is notexceeded. To prevent excessive pressure, the fill density ofHalon 1211 within a container should not exceed that needed toachieve complete filling of the container at the maximumenvisaged storage temperature. For example, for a U.S. DOT4W260 cylinder, the nitrogen partial pressu
19、re shall not exceed129 psig at 70F 9.9 bar at 21C for a 100 lb/ft31602 kg/m3fill density, which yields a total pressure of 150 psig at 70F11.4 bar at 21C. For this example, the safe working pressureof the 4BW260 cylinder is not exceeded for temperaturesbelow 131F 55C. (See Practice D7815.) (See Figs
20、. 1 and 2.)4.1.2 Halon 1211 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 pressure in theHalon 1211 container, parti
21、al pressure of the N2, the fill densityof the Halon 1211 within the container, and the maximum safestorage temperature shall be part of the material analysis(certification). The pressure shall be reported in pound-forceper square inch gauge (preferred) or bar. The fill density shallbe reported in po
22、unds per cubic foot at 70F (preferred) orkilograms per cubic metre at 21C. The maximum safe storagetemperature of the Halon 1211 container shall be reported indegrees Fahrenheit (preferred) or in degrees Celsius and shallconform to applicable regulations for the Halon 1211 containerdesign and use.4.
23、2 Type IIHalon 1211 shall conform to the requirementsof Type I, as listed in 4.1, and shall contain no more than 1.5 %by volume non-condensable gases in the vapor phase, ex-pressed as air when tested by the appropriate test method(s)listed in Section 6.4.3 By agreement between the purchaser and the
24、supplier,analysis may be required and limits established for elements orcompounds not specified in Table 1.4.4 Unless otherwise specified, Type I is assumed.4.5 (WarningExposure to concentrations of Halon 1211in excess of 1.0 % by volume in air during periods of elevatedadrenaline could produce card
25、iac arrhythmia in some person-nel.)5. Sampling5.1 Samples of Halon 1211 shall be taken from the liquid orvapor phase as appropriate. Samples of Halon 1211, taken fromthe liquid phase, shall be taken from filled containers inaccordance with the method specified in ISO 3427 or themethod specified in 2
26、008 Appendix C for Analytical Proce-dures for AHRI Standard 700-2012, Part 7.5.1.1 The sampling vessel shall be capable of safely resist-ing the vapor pressure of the sample at the highest temperaturethat could be encountered during handling, storage, or trans-port. (See Practice D7815.)5.2 The Halo
27、n 1211 selected in accordance with 5.1 shall betested for quality conformance in accordance with Section 6.The presence of one or more defects shall be cause forrejection.6. Test Methods6.1 Purity:6.1.1 Determine the purity by gas chromatography in accor-dance with the technique described in 6.1.2 6
28、.1.5 or by gaschromatography/mass spectrometry (GC/MS) in accordancewith 6.2.2 6.2.5.FIG. 1 Halon 1211 Pressure versus Temperature, English UnitsD7673/D7673M 1526.1.1.1 Prior to sample introduction, a standardization of theGC must be performed using a known bromochlorodifluo-romethane purity standar
29、d.6.1.2 ApparatusThe following special apparatus is re-quired to determine the percent of Halon 1211 by GC:6.1.2.1 Gas Chromatograph System (GC System), equippedwith a flame ionization detector (FID), capillary column splitinjector, subambient (liquid nitrogen) cooling valve and anelectronic integra
30、tor or suitable computer data gathering andreduction system.6.1.2.2 Chromatographic Column210 m (connect the twocolumns below together with the first column end attached tothe injection port):(a) 105 m RTx-1701 (14 % cyanopropylphenyl-86 %methylpolysiloxane), 0.25 mm, 1m.(b) 105 m RTx-200 (5 % diphe
31、nyl-95 % dimethylpolysiloxane), 0.25 mm, 1m.The two columns are attached together, with the first(column a) attached to the injection port of the GC system.Columns are available from several chromatographic supplyvendors.6.1.2.3 Sample IntroductionTake sample from the liquidphase employing the proce
32、dure described in 5.1 of thisspecification; using a standard gas-tight syringe introduce thesample into the GC.6.1.3 ReagentsThe carrier gas shall be a chromatographicgrade of helium.6.1.4 Temperature Programming:6.1.4.1 Install the column in the gas chromatograph andadjust the oven temperature to 2
33、0C. Inject the sample andhold the column oven at 20C for 21 min, then program thetemperature to rise 15C per min to a maximum of 165C, thenposthold for 20 min before recycling.6.1.5 Calculation:6.1.5.1 Calculate weight percent and convert to mole per-cent Halon 1211 as follows:Wi5Ai3RRFi3100(Ai3RRFi
34、#(3)where:Wi= weight percent of component, i,Ai= peak area of component, i,RRFi= Relative Response Factor for component, i,andAi RRFi = sum of all component peak areas times theirrespective relative response factors.6.1.5.2 For ASTM specification, the results must be con-verted to and reported in mo
35、le percentages. Convert individualimpurities from Wt % to Mole % as follows:Mole %i5 100 3 Wi/Mi!/(Wi/Mi# (4)where:Mole %i = mole percent of component, i,Wi= weight percent of component, i,Mi= molecular weight of component, i, andWiMi = sum of all component weights divided by theirrespective molecul
36、ar weights.NOTE 1The GC method described in 6.1.2 6.1.5 may not detectcertain impurities, for example, impurities which may elute within or nearthe relatively large Halon 1211 peak. If other tests indicate the presence ofunidentified impurities, then the gas chromatography/mass spectrometry(GC/MS) m
37、ethod described in 6.2.2 6.2.5 is recommended.6.2 Purity by GC/MS:6.2.1 Determine the purity by gas chromatography/massspectroscopy (GC/MS) in accordance with the technique de-scribed in 6.2.2 6.2.5.FIG. 2 Halon 1211 Pressure versus Temperature, SI UnitsTABLE 1 RequirementsProperty RequirementHalon
38、1211 purity, %, by mol, min 99.0Acidity, ppm by mass, as HBr, max 3.0Water content, ppm by mass, max 20Nonvolatile residue, % by weight, max 0.02Suspended matter or sediment None visibleColor Report valueD7673/D7673M 1536.2.1.1 Prior to sample introduction, a standardization of theGC/MS must be perf
39、ormed using a known bromochlorodifluo-romethane purity standard.6.2.2 ApparatusThe following special apparatus is re-quired to determine the percent of Halon 1211:6.2.2.1 Gas Chromatography/Mass Spectrometry System(GC/MS System) and an electronic integrator or suitablecomputer data gathering and red
40、uction system.6.2.2.2 Chromatographic Column, 344 ft 105 m Rtx-1capillary column, 0.01 in. 0.25 mm internal diameter, station-ary film thickness of approximately 1 m. (Column is availablefrom several chromatographic supply vendors.)6.2.2.3 Sample IntroductionTake sample from the liquidphase employin
41、g the procedure described in 5.1 of thisspecification. Using a standard gas-tight syringe introduce thesample into the GC/MS.6.2.3 ReagentsThe carrier gas shall be a chromatographicgrade of helium.6.2.4 Temperature Programming:6.2.4.1 Install the column in the gas chromatograph/massspectrometer and
42、adjust the oven temperature to -30C. Injectthe sample and hold the column oven at -30C for 13 min, thenprogram the temperature to rise 10C per min to a maximum of200C, then posthold for 10 min before recycling.6.2.5 Calculation:6.2.5.1 Calculate weight percent and convert to mole per-cent Halon 1211
43、 as follows:Wi5Ai3RRFi3100(Ai3RRFi#(5)where:Wi= weight percent of component, i,Ai= peak area of component, i,RRFi= Relative Response Factor for component, i,andAi RRFi = sum of all component peak areas times theirrespective relative response factors.6.2.5.2 For ASTM specifications, the results must
44、be con-verted to and reported in mole percentages. Convert individualimpurities from Wt % to Mole % as follows:Mole %i5 100 3 Wi/Mi!/(Wi/Mi# (6)where:Mole %i= mole percent of component, i,Wi= weight percent of component, i,Mi= molecular weight of component, i, andWi/Mi = sum of all component weights
45、 divided by theirrespective molecular weights.6.3 AcidityDetermine acidity with the method specified in2008 Appendix C to AHRI Standard 700-2012, Part 1.6.4 Water ContentDetermine water content with themethod specified in 2008 Appendix C to AHRI Standard700-2012, Part 2.6.5 Nonvolatile ResidueDeterm
46、ine nonvolatile residuewith the method specified in 2008 Appendix C to AHRIStandard 700-2012, Part 3.6.6 Non-condensable gasesDetermine non-condensablegases with the method specified in 2008 Appendix C to AHRIStandard 700-2012, Part 5.6.7 Suspended Matter and SedimentWhile performing thenonvolatile
47、residue analysis, examine visually for any sus-pended matter or sediment. Observation of any suspendedmatter or sediment shall constitute failure of this test.6.8 Determine color with the method specified in TestMethod D2108. Results should be used as an indicator of othercontamination, and must hav
48、e a description of what is observedas well as the value recorded on the final report. Results fromthe color test that are inconsistent with outcome from otherrequired tests will be the basis for repeat testing to validate thetest results of specific properties.7. Container, Packaging, and Package Ma
49、rking7.1 Containers used for shipping and storage of Halon 1211conforming to this specification shall be marked in accordanceto Code of Federal Regulations (CFR) Title 49, Part 172Subpart D “Marking.” The proper shipping name for Specifi-cation D7673/D7673M Type II (pure) Halon 1211 is “Chlo-rodifluorobromomethane (Refrigerant Gas R 12B1),” UN1974, Hazard Class 2.2 (nonflammable gas). The propershipping name for nitrogen superpressurized Halon 1211 is“Liquefied Gas, nonflammable charged wit
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1