1、 ISO 2016 Gaseous fire-extinguishing systems Physical properties and system design Part 10: HFC 23 extinguishant Systmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 10: Agent extincteur HFC 23 INTERNATIONAL STANDARD ISO 14520-10 Third edition
2、 2016-10-01 Reference number ISO 14520-10:2016(E) ISO 14520-10:2016(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
3、 any 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
4、 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 14520-10:2016(E)Foreword iv 1 Scope . 1 2 Normative references 1 3 Terms and definitions . 1 4 Characteristics and uses . 1 4.1 General . 1 4.2 Use of HFC 23 systems 2 5 Safety of pe
5、rsonnel . 6 6 System design 6 6.1 Fill density. 6 6.2 Superpressurization . 7 6.3 Extinguishant quantity . 7 7 Environmental properties 9 ISO 2016 All rights reserved iii Contents Page ISO 14520-10:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of
6、 national 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. Int
7、ernational 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 i
8、ntended 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
9、www.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 docume
10、nt 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
11、expressions 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, Equipme
12、nt for fire protection and fire fighting, Subcommittee SC 8, Gaseous media and fire fighting systems using gas. This third edition cancels and replaces the second edition (ISO 14520-10:2005), which has been technically revised with the following changes: added reference to Table 8 and Table 9 for 41
13、 bar and 70 bar systems in 6.1; added Table 9 for 70 bar storage container characteristics data; added Figure 2, pressure vs temperature chart for 70 bar system; added Clause 7. A list of all parts in the ISO 14520 series can be found on the ISO website.iv ISO 2016 All rights reserved INTERNATIONAL
14、ST ANDARD ISO 14520-10:2016(E) Gaseous fire-extinguishing systems Physical properties and system design Part 10: HFC 23 extinguishant 1 Scope This document contains specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 23 extinguishant. It includes details of physical
15、 properties, specification, usage and safety aspects and is applicable to systems operating at a nominal pressure of 41 bar without nitrogen superpressurization and 70 bar superpressurized with nitrogen. 2 Normative references The following documents are referred to in the text in such a way that so
16、me 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 14520-1:2015, Gaseous fire-extinguishing systems Physical properti
17、es 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 following addresses: IEC Electropedia: available at http
18、:/ /www.electropedia.org/ ISO Online browsing platform: available at http:/ /www.iso.org/obp 4 Characteristics and uses 4.1 General Extinguishant HFC 23 shall comply with the specification shown in Table 1. HFC 23 is a colourless, almost odourless, electrically non-conductive gas with a density appr
19、oximately 2,4 times that of air. The physical properties are shown in Table 2. HFC 23 extinguishes fires mainly by physical means, also by some chemical means. ISO 2016 All rights reserved 1 ISO 14520-10:2016(E) Table 1 Specification for HFC 23 Property Requirement Purity 99,6 % (mol/mol), min. Acid
20、ity 3 10 6by mass, max. Water content 10 10 6by mass, max. Non-volatile residue 0,01 % by mass, max. Suspended matter or sediment None visible Table 2 Physical properties of HFC 23 Property Units Value Molecular mass 70 Boiling point at 1,013 bar (absolute) C 82,0 Freezing point C 155,2 Critical tem
21、perature C 25,9 Critical pressure bar abs 48,36 Critical volume cm 3 /mol 133 Critical density kg/m 3 525 Vapour pressure 20 C bar abs 41,80 Liquid density 20 C kg/m 3 806,6 Saturated vapour density 20 C kg/m 3 263,0 Specific volume of superheated vapour at 1,013 bar and 20 C m 3 /kg 0,340 9 Chemica
22、l formula CHF 3 Trifluoromethane Chemical name 4.2 Use of HFC 23 systems HFC 23 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 per volume of protected space are shown in Table 3 for v
23、arious 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. Concentrations for acetone heptane, methanol and toluene are shown in Table 5, and ine
24、rting concentrations are shown in Table 6.2 ISO 2016 All rights reserved ISO 14520-10:2016(E) Table 3 HFC 23 total flooding quantity Tempera- ture T C Specific vapour volume S HFC 23 mass requirements per unit volume of protected space, m/V (kg/m 3 ) Design concentration (by volume) m 3 /kg 10 % 12
25、% 14 % 15 % 16 % 17 % 18 % 20 % 22 % 24 % 60 0,2428 0,4576 0,5616 0,6705 0,7268 0,7845 0,8436 0,9041 1,0297 1,1617 1,3006 55 0,2492 0,4459 0,5472 0,6533 0,7081 0,7644 0,8219 0,8809 1,0032 1,1318 1,2672 50 0,2555 0,4349 0,5337 0,6371 0,6907 0,7455 0,8016 0,8591 0,9785 1,1039 1,2360 45 0,2617 0,4246 0
26、,5211 0,6221 0,6743 0,7278 0,7826 0,8388 0,9553 1,0778 1,2067 40 0,2680 0,4146 0,5088 0,6074 0,6585 0,7107 0,7643 0,8191 0,9328 1,0524 1,1783 35 0,2742 0,4052 0,4973 0,5937 0,6436 0,6947 0,7470 0,8006 0,9117 1,0286 1,1517 30 0,2803 0,3964 0,4865 0,5808 0,6296 0,6795 0,7307 0,7831 0,8919 1,0062 1,126
27、6 25 0,2865 0,3878 0,4760 0,5682 0,6160 0,6648 0,7149 0,7662 0,8726 0,9845 1,1022 20 0,2926 0,3797 0,4660 0,5564 0,6031 0,6510 0,7000 0,7502 0,8544 0,9639 1,0793 15 0,2987 0,3720 0,4565 0,5450 0,5908 0,6377 0,6857 0,7349 0,8370 0,9443 1,0572 10 0,3047 0,3647 0,4475 0,5343 0,5792 0,6251 0,6722 0,7204
28、 0,8205 0,9257 1,0364 5 0,3108 0,3575 0,4388 0,5238 0,5678 0,6129 0,6590 0,7063 0,8044 0,9075 1,0161 0 0,3168 0,3507 0,4304 0,5139 0,5570 0,6013 0,6465 0,6929 0,7891 0,8903 0,9968 5 0,3229 0,3441 0,4223 0,5042 0,5465 0,5899 0,6343 0,6798 0,7742 0,8735 0,9780 10 0,3289 0,3378 0,4146 0,4950 0,5365 0,5
29、791 0,6227 0,6674 0,7601 0,8576 0,9601 15 0,3349 0,3318 0,4072 0,4861 0,5269 0,5688 0,6116 0,6555 0,7465 0,8422 0,9429 20 0,3409 0,3259 0,4000 0,4775 0,5177 0,5587 0,6008 0,6439 0,7334 0,8274 0,9263 25 0,3468 0,3204 0,3932 0,4694 0,5089 0,5492 0,5906 0,6330 0,7209 0,8133 0,9106 30 0,3528 0,3149 0,38
30、65 0,4614 0,5002 0,5399 0,5806 0,6222 0,7086 0,7995 0,8951 35 0,3588 0,3097 0,3801 0,4537 0,4918 0,5309 0,5708 0,6118 0,6968 0,7861 0,8801 40 0,3647 0,3047 0,3739 0,4464 0,4839 0,5223 0,5616 0,6019 0,6855 0,7734 0,8659 45 0,3707 0,2997 0,3679 0,4391 0,4760 0,5138 0,5525 0,5922 0,6744 0,7609 0,8519 5
31、0 0,3766 0,2950 0,3621 0,4323 0,4686 0,5058 0,5439 0,5829 0,6638 0,7489 0,8385 NOTE This information refers only to HFC-23 and does not represent any other products containing trifluoromethane as a component. Symbols:m/V is the agent mass requirements (kg/m 3 ); i.e. mass, m, in kilograms of agent r
32、equired 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 temperature in the hazard
33、 area;S is the specific volume (m 3 /kg); the specific volume of superheated HFC 23 vapour at a pressure of 1,013 bar may be approximated by the formulaS = k 1+k 2 Twherek 1= 0,316 4k 2= 0,001 2c is the concentration (%); i.e. the volumetric concentration of HFC 23 in air at the temperature indicate
34、d and a pressure of 1,013 bar absolute. ISO 2016 All rights reserved 3 ISO 14520-10:2016(E) Tempera- ture T C Specific vapour volume S HFC 23 mass requirements per unit volume of protected space, m/V (kg/m 3 ) Design concentration (by volume) m 3 /kg 10 % 12 % 14 % 15 % 16 % 17 % 18 % 20 % 22 % 24 %
35、 55 0,3826 0,2904 0,3564 0,4255 0,4612 0,4978 0,5353 0,5737 0,6534 0,7372 0,8254 60 0,3885 0,2860 0,3510 0,4190 0,4542 0,4903 0,5272 0,5650 0,6435 0,7260 0,8128 65 0,3944 0,2817 0,3457 0,4128 0,4474 0,4830 0,5193 0,5566 0,6339 0,7151 0,8007 70 0,4004 0,2775 0,3406 0,4066 0,4407 0,4757 0,5115 0,5482
36、0,6244 0,7044 0,7887 NOTE This information refers only to HFC-23 and does not represent any other products containing trifluoromethane as a component. Symbols:m/V is the agent mass requirements (kg/m 3 ); i.e. mass, m, in kilograms of agent required per cubic metre of protected volume, V, to produce
37、 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 temperature in the hazard area;S is the specific volume (m 3 /kg); the specific vol
38、ume of superheated HFC 23 vapour at a pressure of 1,013 bar may be approximated by the formulaS = k 1+k 2 Twherek 1= 0,316 4k 2= 0,001 2c is the concentration (%); i.e. the volumetric concentration of HFC 23 in air at the temperature indicated and a pressure of 1,013 bar absolute.Table 3 (continued)
39、 4 ISO 2016 All rights reserved ISO 14520-10:2016(E) Table 4 HFC 23 reference extinguishing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) Heptane (room test)12,6 12,316,4 Surface Class A Wood Crib PMMA PP ABS10,5 12,5 12,5 12,416,3
40、Higher Hazard Class A See Note 4 16,3 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 concentration for the Class B fuel is the higher value of the heptane cup bur
41、ner 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 multiplied by 1,3. In the absence of any of the four extinguishment values, t
42、he 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 design concentration. NOTE 5 See ISO 14520-1:2015, 7.5.1.3 for guidance on
43、 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 be achieved and allowed when validated by test reports from internationa
44、lly recognized laboratories. Table 5 HFC 23 extinguishing and design concentrations for other fuels Fuel Extinguishment % by volume Minimum design % by volume Acetone 13,2 17, 2 Ethanol Ethyl acetate Kerosene 16,1 13,4 13,2 20,9 17,4 17, 2 Methanol Propane 18,2 14,2 23,7 18,5 Toluene 12,6 16,4 NOTE
45、Extinguishing concentrations for all Class B fuels listed were derived in accordance with ISO 14520-1:2015, Annex B. Minimum design values have been increased to the minimum design concentration established for heptane in accordance with ISO 14520-1:2015, 7.5.1. Table 6 HFC 23 inerting and design co
46、ncentrations Fuel Inertion % by volume Minimum design % by volume Methane 20,2 22,2 Propane 20,2 22,2 NOTE Inerting concentrations were derived in accordance with the requirements of ISO 14520-1:2015, Annex D and 7.5.2. ISO 2016 All rights reserved 5 ISO 14520-10:2016(E) 5 Safety of personnel Any ha
47、zard to personnel created by the discharge of HFC 23 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 m
48、inimum safety requirements, see ISO 14520-1:2015, Clause 5. Toxicological information for HFC 23 is shown in Table 7. Table 7 Toxicological information for HFC 23 Property Value % by volume ALC 65 No observed adverse effect level (NOAEL) 30 Lowest observed adverse effect level (LOAEL) 30 NOTE ALC is
49、 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 result in pressures exceeding the container specifications at the maximum design temperature. For examples, see Tables 8 and 9. Exceeding the maximum fill density may result in the container becoming “liquid full”, with the effect that an extremely high rise
