1、 ISO 2016 Gaseous fire-extinguishing systems Physical properties and system design Part 2: CF 3 I extinguishant Systmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 2: Agent extincteur CF 3 I INTERNATIONAL STANDARD ISO 14520-2 Third edition 20
2、16- 10-01 Reference number ISO 14520-2:2016(E) ISO 14520-2:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any
3、 means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401
4、 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 14520-2:2016(E)Foreword iv 1 Scope . 1 2 Normative reference . 1 3 Terms and definitions . 1 4 Characteristics and uses . 1 4.1 General . 1 4.2 Use of CF 3 I systems . 2 5 Safety of pers
5、onnel . 4 6 System design 5 6.1 Fill density. 5 6.2 Superpressurization . 5 6.3 Extinguishant quantity . 5 7 Environmental properties 6 ISO 2016 All rights reserved iii Contents Page ISO 14520-2:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of na
6、tional standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. Intern
7、ational organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those inte
8、nded for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www
9、.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document
10、will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and exp
11、ressions related to conformit y assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html. The committee responsible for this document is ISO/TC 21, Equipment
12、for fire protection and fire fighting, Subcommittee SC 8, Gaseous media and firefighting systems using gas. This third edition cancels and replaces the second edition (ISO 14520-2:2006), which has been technically revised with the following changes: added Clause 7. A list of all parts in the ISO 145
13、20 series can be found on the ISO website.iv ISO 2016 All rights reserved INTERNATIONAL ST ANDARD ISO 14520-2:2016(E) Gaseous fire-extinguishing systems Physical properties and system design Part 2: CF 3 I extinguishant 1 Scope This document contains specific requirements for gaseous fire-extinguish
14、ing systems, with respect to the CF 3 I extinguishant. It includes details of physical properties, specification, usage and safety aspects. This document covers systems operating at a nominal pressure of 25 bar. This does not preclude the use of other systems. 2 Normative reference The following doc
15、uments are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 14520-1, G
16、aseous fire-extinguishing systems Physical properties and system design Part 1: General requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 14520-1 apply. ISO and IEC maintain terminological databases for use in standardization at the follow
17、ing addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 4 Characteristics and uses 4.1 General Extinguishant CF 3 I shall comply with the specification shown in Table 1. CF 3 I is a colourless, almost odourless, elect
18、rically non-conductive gas with a density approximately seven times that of air. The physical properties are shown in Table 2. CF 3 I extinguishes fires mainly by chemical means, but also by some physical means. ISO 2016 All rights reserved 1 ISO 14520-2:2016(E) Table 1 Specification for CF 3 I Prop
19、erty Requirement Purity 99,9 % by mass, min. Acidity 1 10 6by mass, max. Water content 6 10 6by mass, max. Non-volatile residue 100 10 6by mass, max. Suspended matter or sediment None visible Table 2 Physical properties of CF 3 I Property Units Value Molecular mass 195,9 Boiling point at 1,013 bar (
20、absolute) C 22,5 Freezing point C 1 1 0 Critical temperature C 122 Critical pressure bar abs 40,4 Critical volume cm 3 /mol 225,0 Critical density kg/m 3 871 Vapour pressure, 20 C bar abs 4,65 Liquid density, 20 C kg/m 3 2 096 Saturated vapour density, 20 C kg/m 3 8,051 Specific volume of superheate
21、d vapour at 1,013 bar and 20 C m 3 /kg 0,112 Chemical formula CF 3 I Trifluoroiodomethane Chemical name 4.2 Use of CF 3 I systems CF 3 I total flooding systems may be used for extinguishing fires of all classes within the limits specified in ISO 14520-1:2015, Clause 4. The extinguishant requirements
22、 per volume of protected space are shown in Table 3 for various levels of concentration. These are based on methods shown in ISO 14520-1:2015, 7.6. The extinguishing concentrations and design concentrations for n-heptane and Surface Class A hazards are shown in Table 4. Inerting concentrations are s
23、hown in Table 5. Table 3 CF 3 I total flooding quantity Tempera- ture Specific volume CF 3 I mass requirements per unit volume of protected space, m/V (kg/m 3 ) T S Design concentration (by volume) C m 3 /kg 3 % 4 % 5 % 6 % 7 % 8 % 9 % 10 % 25 0,1013 0,3053 0,4113 0,5196 0,6301 0,7430 0,8584 0,9763
24、1,0969 20 0,1038 0,2980 0,4014 0,5070 0,6149 0,7251 0,8377 0,9528 1,0704 15 0,1063 0,2909 0,3920 0,4851 0,6005 0,7081 0,8180 0,9304 1,0453 10 0,1088 0,2843 0,3830 0,4837 0,5867 0,6918 0,7992 0,9090 1,0212 5 0,1113 0,2779 0,3744 0,4729 0,5735 0,6763 0,7813 0,8886 0,99832 ISO 2016 All rights reserved
25、ISO 14520-2:2016(E) Tempera- ture Specific volume CF 3 I mass requirements per unit volume of protected space, m/V (kg/m 3 ) T S Design concentration (by volume) C m 3 /kg 3 % 4 % 5 % 6 % 7 % 8 % 9 % 10 % 0 0,1138 0,2718 0,3661 0,4625 0,5609 0,6614 0,7641 0,8691 0,9764 5 0,1163 0,2659 0,3583 0,4526
26、0,5488 0,6472 0,7477 0,8504 0,9554 10 0,1188 0,2603 0,3507 0,4430 0,5373 0,6336 0,7320 0,8325 0,9353 15 0,1213 0,2550 0,3436 0,4339 0,5262 0,6205 0,7169 0,8153 0,9160 20 0,1238 0,2498 0,3366 0,4251 0,5156 0,6080 0,7024 0,7989 0,8975 25 0,1263 0,2449 0,3299 0,4167 0,5054 0,5960 0,6885 0,7831 0,8797 3
27、0 0,1288 0,2401 0,3235 0,4086 0,4956 0,5844 0,6751 0,7679 0,8627 35 0,1313 0,2356 0,3173 0,4008 0,4861 0,5733 0,6623 0,7532 0,8462 40 0,1338 0,2311 0,3114 0,3934 0,4771 0,5625 0,6499 0,7392 0,8304 45 0,1363 0,2269 0,3057 0,3861 0,4683 0,5522 0,6380 0,7256 0,8152 50 0,1388 0,2228 0,3002 0,3792 0,4599
28、 0,5423 0,6265 0,7125 0,8005 55 0,1413 0,2189 0,2949 0,3725 0,4517 0,5327 0,6154 0,6999 0,7863 60 0,1438 0,2151 0,2898 0,3660 0,4439 0,5234 0,6047 0,6878 0,7727 65 0,1463 0,2114 0,2848 0,3598 0,4363 0,5145 0,5944 0,6760 0,7595 70 0,1488 0,2078 0,2800 0,3537 0,4290 0,5058 0,5844 0,6647 0,7467 75 0,15
29、13 0,2044 0,2754 0,3479 0,4219 0,4975 0,5747 0,6537 0,7344 80 0,1538 0,2011 0,2709 0,3422 0,4150 0,4894 0,5654 0,6431 0,7224 85 0,1563 0,1979 0,2666 0,3367 0,4084 0,4816 0,5563 0,6328 0,7109 90 0,1588 0,1948 0,2624 0,3314 0,4020 0,4740 0,5476 0,6228 0,6997 95 0,1613 0,1917 0,2583 0,3263 0,3957 0,466
30、6 0,5391 0,6132 0,6888 100 0,1638 0,1888 0,2544 0,3213 0,3897 0,4595 0,5309 0,6038 0,6783 NOTE This information refers only to the product CF 3 I and does not represent any other product containing trifluoroiodomethane as a component. Symbols:m/V is the agent mass requirements (kg/m 3 ), i.e. mass,
31、m, in kilograms of agent required per cubic metre of protected volume, V, to produce the indicated concentration at the temperature specified;V is the net volume of hazard (m 3 ), i.e the enclosed volume minus the fixed structures impervious to extinguishant T is the temperature (C), i.e. the design
32、 temperature in the hazard area;S is the specific volume (m 3 /kg); the specific volume of superheated CF 3 I vapour at a pressure of 1,013 bar may be approximated by the formulaS = k 1+k 2 Twherek 1= 0,113 8k 2= 0,000 5c is the concentration (%), i.e. the volumetric concentration of CF 3 I in air a
33、t the temperature indicated and a pressure of 1,013 bar absolute.Table 3 (continued) ISO 2016 All rights reserved 3 ISO 14520-2:2016(E) Table 4 CF 3 I reference extinguishing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) 3,5 4,6 Hep
34、tane (room test) 3,5 Surface Class A Wood crib 3,5 PMMA See Note 3 PP ABS Higher Hazard Class A See Note 4 4,3 NOTE 1 The extinguishment values for the Class B and the Surface Class A fuels are determined by testing in accordance with ISO 14520-1:2015, Annexes B and C. NOTE 2 The minimum design conc
35、entration for the Class B fuel is the higher value of the heptane cup burner or room test heptane extinguishment concentration multiplied by 1,3. NOTE 3 The minimum design concentration for Surface Class A fuel is the highest value of the wood crib, PMMA, PP or ABS extinguishment concentrations mult
36、iplied by 1,3. In the absence of any of the four extinguishment values, the minimum design concentration for Surface Class A is that of Higher Hazard Class A. NOTE 4 The minimum design concentration for Higher Hazard Class A fuels is the higher of the Surface Class A or 95 % of the Class B minimum d
37、esign concentration. NOTE 5 See ISO 14520-1:2015, 7.5.1.3 for guidance on Class A fuels. In Table 4, the extinguishing and design concentrations for room-scale test fires are for informational purposes only. Lower and higher extinguishing concentrations than those shown for room-scale test fires may
38、 be achieved and allowed when validated by test reports from internationally recognized laboratories. Table 5 CF 3 I inerting and design concentrations Fuel Inertion % by volume Minimum design % by volume Propane 6,5 7, 2 NOTE Inerting concentrations were determined in accordance with the requiremen
39、ts of ISO 14520-1:2015, 7.5.2 and Annex D. 5 Safety of personnel Any hazard to personnel created by the discharge of CF 3 I 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) the bre
40、akdown products of the extinguishant resulting from exposure to fire. Toxicological information for CF 3 I is shown in Table 6. Since the design concentrations exceed the LOAEL under normal design conditions, CF 3 I shall only be used for total flooding in normally unoccupied areas. For minimum safe
41、ty requirements, see ISO 14520-1:2015, Clause 5.4 ISO 2016 All rights reserved ISO 14520-2:2016(E) Table 6 Toxicological information for CF 3 I Property Value % by volume LC 50 ALC 27,4 12,8 No observed adverse effect level (NOAEL) 0,2 Lowest observed adverse effect level (LOAEL) 0,4 NOTE LC 50is th
42、e concentration lethal to 50 % of a rat population during a 15 min exposure. ALC is the approximate lethal concentration for a rat population during a 4 h exposure. 6 System design 6.1 Fill density The fill density of the container shall not exceed the values shown in Table 7. Exceeding the maximum
43、fill density may result in the container becoming “liquid full”, with the effect that an extremely high rise in pressure occurs with small increases in temperature, which could adversely affect the integrity of the container assembly. The relationships between pressure and temperature are shown in F
44、igure 1 for various levels of fill density. Table 7 Storage container characteristics for CF 3 I Property Unit Value Maximum fill density kg/m 3 1 680 Maximum container working pressure at 50 C bar 35,5 Superpressurization at 20 C bar 25 NOTE Reference should be made to Figure 1 for further data on
45、pressure/temperature relationships. 6.2 Superpressurization Containers shall be superpressurized with nitrogen with a moisture content of not more than 60 10 6parts per million by mass to an equilibrium pressure of 25 bar + % at a temperature of 20 C (see Clause 1). 6.3 Extinguishant quantity The qu
46、antity of extinguishant shall be the minimum required to achieve the design concentration within the hazard volume at the minimum expected temperature, determined using Table 3 and the method specified in ISO 14520-1:2015, 7.6. The design concentrations shall be that specified for relevant hazards s
47、hown in Table 4. This includes a 1,3 safety factor on the extinguishing concentration. Consideration should be given to increasing this for particular hazards and seeking advice from the relevant authority. ISO 2016 All rights reserved 5 ISO 14520-2:2016(E) Key 1 CF 3 I 1 680 kg/m 3 2 CF 3 I 1 470 k
48、g/m 3 X temperature, C Y pressure, bar Figure 1 Temperature/pressure graph for CF 3 I pressurized to 25 bar with nitrogen at 20 C 7 Environmental properties For information purposes, environmental properties of CF 3 I extinguishant are provided:GWP (100 years ITH) 0,4ODP 0 1) NOTE 1 See ISO 14520-1:
49、2015, 4.2.1 for a discussion of GWP values and their relation to the impact of a gas on climate change/global warming. NOTE 2 Environmental properties were derived from the following: 2005 IPCC/TEAP Special Report Safeguarding the Ozone Layer and the Global Climate System: Issues Related to Hydrofluorocarbons and Perfluorocarbons; 2007 Fourth Assessment Report of the Intergovernmental Panel on Climate Chang
