1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21096-0 SANS 14520-2:2008Edition 2ISO 14520-2:2006Edition 2SOUTH AFRICAN NATIONAL STANDARD Gaseous fire-extinguishing systems Physical pro
4、perties and system design Part 2: CF3I extinguishant This national standard is the identical implementation of ISO 14520-2:2006 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191
5、 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 14520-2:2008 Edition 2 ISO 14520-2:2006 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 21C, Fire safety Fixed fire detection and
6、 extinguishing systems, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in September 2008. This SANS document supersedes SABS ISO 14520-2:2000 (edition 1). INTERNATIONALSTANDARDISO14520-2Second editio
7、n2006-02-15Reference numberISO 14520-2:2006(E) ISO 2006Gaseous fire-extinguishing systems Physical properties and system design Part 2:CF3I extinguishantSystmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 2: Agent extincteur CF3ISANS 14520-2:
8、2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-2:2006(E)ii ISO 2006 All rights reservedPDF disclaimerThis PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed b
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11、ISO member bodies. In theunlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,electronic
12、or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below orISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.is
13、o.orgPublished in SwitzerlandSANS 14520-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-2:2006(E) ISO 2006 All rights reserved iiiForewordISO (the International Organization for Standardization) is a worldwide federation of na
14、tional standards bodies(ISO member bodies). The work of preparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. Internati
15、onal organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules
16、given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least
17、75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 14520-2 was prepared by Technical Committee ISO/TC 21, Equ
18、ipment for fire protection and fire fighting,Subcommittee SC 8, Gaseous media and firefighting systems using gas.This second edition cancels and replaces the first edition (ISO 14520-2:2000), which has been technicallyrevised. It incorporates ISO 14520-2:2000/Cor.1:2001.ISO 14520 consists of the fol
19、lowing parts, under the general title Gaseous fire-extinguishing systems Physical properties and system design: Part 1: General requirements Part 2: CF I extinguishant Part 5: FK-5-1-12 extinguishant Part 6: HCFC Blend A extinguishant Part 8: HFC 125 extinguishant Part 9: HFC 227ea extinguishant Par
20、t 10: HFC 23 extinguishant Part 11: HFC 236fa extinguishant Part 12: IG-01 extinguishant Part 13: IG-100 extinguishant Part 14: IG-55 extinguishant Part 15: IG-541 extinguishantParts 3, 4 and 7, which dealt with FC-2-1-8, FC-3-1-10 and HCFC 124 extinguishants, respectively, have beenwithdrawn, as th
21、ese types are no longer manufactured.3SANS 14520-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ivSANS 14520-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL
22、STANDARD ISO 14520-2:2006(E) ISO 2006 All rights reserved 1Gaseous fire-extinguishing systems Physical properties and system design Part 2:CF3I extinguishant1ScopeThis part of ISO 14520 gives specific requirements for gaseous fire-extinguishing systems, with respect to theCF3I extinguishant. It incl
23、udes details of physical properties, specification, usage and safety aspects and isapplicable to systems operating at a nominal pressure of 25 bar. This does not preclude the use of othersystems.2 Normative referencesThe following referenced documents are indispensable for the application of this do
24、cument. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 14520-1:2006, Gaseous fire-extinguishing systems Physical properties and system design Part 1:General requirements3 Terms and defin
25、itionsFor the purposes of this document, the terms and definitions given in ISO 14520-1 apply.4Characteristics and uses4.1 GeneralExtinguishant CF3I shall comply with the specification according to Table 1.CF3I is a colourless, almost odourless, electrically non-conductive gas with a density approxi
26、mately seven timesthat of air.The physical properties are given in Table 2.CF3I extinguishes fires mainly by chemical means, but also by some physical means.SANS 14520-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-2:2006(E)2
27、 ISO 2006 All rights reserved4.2 Use of CF3I systemsCF3I total flooding systems may be used for extinguishing fires of all classes within the limits specified inISO 14520-1:2006, Clause 4.The extinguishant requirements per volume of protected space are given in Table 3 for various levels ofconcentra
28、tion. These are based on methods given in ISO 14520-1:2006, 7.6.The extinguishing concentrations and design concentrations for n-heptane and Surface class A hazards aregiven in Table 4, and inerting concentrations in Table 5.Table 1 Specification for CF3IProperty RequirementPurity by mass, min.Acidi
29、ty by mass, max.Water content by mass, max.Non-volatile residue by mass, max.Suspended matter or sediment None visibleTable 2 Physical properties of CF3IProperty Unit ValueMolecular mass 195,9Boiling point at 1,013 bar (absolute) aFreezing pointCritical temperature 122Critical pressure bar abs a40,4
30、Critical volume cm3/mol 225,0Critical density kg/m3871Vapour pressure bar abs a4,65Liquid density kg/m32 096Saturated vapour density kg/m38,051Specific volume of superheated vapour at 1,013 bar and m3/kg 0,124Chemical formulaChemical name Trifluoroiodomethanea; 99,9 %1 1066 106100 106C 22,5C 110C20C
31、20C20C20CCF3I1 bar = 0,1 MPa = 105Pa 1 MPa = 1 N/mm2.SANS 14520-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-2:2006(E) ISO 2006 All rights reserved 3Table 3 CF3I total flooding quantityTemperature Specific vapour volume CF3
32、I mass requirements per unit volume of protected space, (kg/m3) This information refers only to CF3I, and may not represent any other products containing Trifluoroiodomethane as a componentDesign concentration (by volume)m3/kg0,1013 0,3053 0,4113 0,5196 0,6301 0,7430 0,8584 0,9763 1,09690,1038 0,298
33、0 0,4014 0,5070 0,6149 0,7251 0,8377 0,9528 1,07040,1063 0,2909 0,3920 0,4851 0,6005 0,7081 0,8180 0,9304 1,04530,1088 0,2843 0,3830 0,4837 0,5867 0,6918 0,7992 0,9090 1,02120,1113 0,2779 0,3744 0,4729 0,5735 0,6763 0,7813 0,8886 0,99830 0,1138 0,2718 0,3661 0,4625 0,5609 0,6614 0,7641 0,8691 0,9764
34、5 0,1163 0,2659 0,3583 0,4526 0,5488 0,6472 0,7477 0,8504 0,955410 0,1188 0,2603 0,3507 0,4430 0,5373 0,6336 0,7320 0,8325 0,935315 0,1213 0,2550 0,3436 0,4339 0,5262 0,6205 0,7169 0,8153 0,916020 0,1238 0,2498 0,3366 0,4251 0,5156 0,6080 0,7024 0,7989 0,897525 0,1263 0,2449 0,3299 0,4167 0,5054 0,5
35、960 0,6885 0,7831 0,879730 0,1288 0,2401 0,3235 0,4086 0,4956 0,5844 0,6751 0,7679 0,862735 0,1313 0,2356 0,3173 0,4008 0,4861 0,5733 0,6623 0,7532 0,846240 0,1338 0,2311 0,3114 0,3934 0,4771 0,5625 0,6499 0,7392 0,830445 0,1363 0,2269 0,3057 0,3861 0,4683 0,5522 0,6380 0,7256 0,815250 0,1388 0,2228
36、 0,3002 0,3792 0,4599 0,5423 0,6265 0,7125 0,800555 0,1413 0,2189 0,2949 0,3725 0,4517 0,5327 0,6154 0,6999 0,786360 0,1438 0,2151 0,2898 0,3660 0,4439 0,5234 0,6047 0,6878 0,772765 0,1463 0,2114 0,2848 0,3598 0,4363 0,5145 0,5944 0,6760 0,759570 0,1488 0,2078 0,2800 0,3537 0,4290 0,5058 0,5844 0,66
37、47 0,746775 0,1513 0,2044 0,2754 0,3479 0,4219 0,4975 0,5747 0,6537 0,734480 0,1538 0,2011 0,2709 0,3422 0,4150 0,4894 0,5654 0,6431 0,722485 0,1563 0,1979 0,2666 0,3367 0,4084 0,4816 0,5563 0,6328 0,710990 0,1588 0,1948 0,2624 0,3314 0,4020 0,4740 0,5476 0,6228 0,699795 0,1613 0,1917 0,2583 0,3263
38、0,3957 0,4666 0,5391 0,6132 0,6888100 0,1638 0,1888 0,2544 0,3213 0,3897 0,4595 0,5309 0,6038 0,6783is the agent mass requirement (in kilograms per cubic metre); i.e. mass, , in kilograms of agent required per cubicmetre of protected volume to produce the indicated concentration at the temperature s
39、pecified;is the net volume of hazard (in cubic metres); i.e. the enclosed volume minus the fixed structures impervious toextinguishantis the temperature (in degrees Celsius); i.e. the design temperature in the hazard area;is the specific volume (in cubic metres per kilogram); the specific volume of
40、superheated CF3I vapour at a pressureof 1,013 bar may be approximated bywhere ; is the concentration (in percent); i.e. the volumetric concentration of CF3I in air at the temperature indicated, and apressure of 1,013 bar absolute.TSm/VC 3% 4% 5% 6% 7% 8% 9% 10 %252015105m/V mVVm =parenleftBigc100 cp
41、arenrightBigVSTSS = k1+ k2Tk1= 0,113 8 k2= 0,000 5cSANS 14520-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-2:2006(E)4 ISO 2006 All rights reserved5 Safety of personnelAny hazard to personnel created by the discharge of CF3I
42、 shall be considered in the design of the system.Potential hazards can arise from the following:a) the extinguishant itself;b) the combustion products of the fire;c) breakdown products of the extinguishant resulting from exposure to fire.For minimum safety requirements, see ISO 14520-1:2006, Clause
43、5.Table 4 CF3I reference extinguishing and design concentrationsFuel Extinguishment Minimum designby volume by volumeClass BHeptane (cup burner) 3,5 4,6Heptane (room test) 3,5Surface Class AWood crib 3,5PMMA aPP ABS Higher Hazard Class Ab9,3The extinguishment values for the Class B and the Surface C
44、lass A fuels are determined by testing in accordance withISO 14520-1:2006, Annexes B and C.The minimum design concentration for the Class B fuel is the higher value of the heptane cup burner or room test heptaneextinguishment concentration multiplied by 1,3.See ISO 14520-1:2006, 7.5.1.3, for guidanc
45、e on Class A fuels.The extinguishing and design concentrations for room-scale test fires are for informational purposes only. Lower and higherextinguishing concentrations than those shown for room-scale test fires may be achieved and allowed when validated bytest reports from internationally recogni
46、zed laboratories.aThe minimum design concentration for Surface Class A fuel is the highest value of the wood crib, PMMA, PP or ABS extinguishmentconcentrations multiplied by 1,3. In the absence of any of the 4 extinguishment values, the minimum design concentration for SurfaceClass A shall be that o
47、f Higher Hazard Class A.bThe minimum design concentration for Higher Hazard Class A fuels shall be the higher of the surface Class A or of the Class Bminimum design concentration.Table 5 CF3I inerting and design concentrationsFuel Extinguishment Minimum designby volume by volumePropane 6,5 7,2Inerti
48、ng concentrations determined in accordance with ISO 14520-1:2006, 7.5.2 and Annex D.% %95 % %SANS 14520-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-2:2006(E) ISO 2006 All rights reserved 5Toxicological information for CF3I
49、 is given in Table 6. Since the design concentrations exceed the LOAEL undernormal design conditions, CF3I shall only be used for total flooding in normally unoccupied areas.6 System design6.1 Fill densityThe fill density of the container shall not exceed the values given in Table 7.Exceeding the maximum fill density may result in the container becoming “liquid full”, with the effect that anextremely high rise in pressure occurs with small increases in temperature, which could adver
