1、 ISO 2016 Gaseous fire-extinguishing systems Physical properties and system design Part 11: HFC 236fa extinguishant Systmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 11: Agent extincteur HFC 236fa INTERNATIONAL STANDARD ISO 14520-11 Third e
2、dition 2016-10-01 Reference number ISO 14520-11:2016(E) ISO 14520-11:2016(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
3、 or by 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 Blandonne
4、t 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 14520-11:2016(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 236fa systems 2 5 Saf
5、ety of personnel . 5 6 System design 6 6.1 Fill density. 6 6.2 Superpressurization . 7 6.3 Extinguishant quantity . 7 7 Environmental properties 8 ISO 2016 All rights reserved iii Contents Page ISO 14520-11:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide fede
6、ration of 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 commi
7、ttee. International 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 an
8、d those intended 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, Par
9、t 2 (see 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 t
10、he document 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 t
11、erms and 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
12、, Equipment 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 14520-11:2005), which has been technically revised with the following changes: in Table 5, minimum design data was
13、corrected from previous edition; all but values for ethanol and methanol were incorrect; 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 ST ANDARD ISO 14520-11:2016(E) Gaseous fire-extinguishing systems Physica
14、l properties and system design Part 11: HFC 236fa extinguishant 1 Scope This document contains specific requirements for gaseous fire-extinguishing systems, with respect to the HFC 236fa extinguishant. It includes details of physical properties, specification, usage and safety aspects. This document
15、 covers systems operating at nominal pressures of 25 bar and 42 bar superpressurized with nitrogen. This does not preclude the use of other systems. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of
16、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 properties and system design Part 1: General requirements. 3 Te
17、rms 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:/ /www.electropedia.org/ ISO Online browsing platform:
18、 available at http:/ /www.iso.org/obp 4 Characteristics and uses 4.1 General Extinguishant HFC 236fa shall comply with the specification shown in Table 1. HFC 236fa is a colourless, almost odourless, electrically non-conductive gas with a density approximately five times that of air. The physical pr
19、operties are shown in Table 2. HFC 236fa extinguishes fires mainly by physical means, but also by some chemical means. ISO 2016 All rights reserved 1 ISO 14520-11:2016(E) Table 1 Specification for HFC 236fa Property Requirement Purity 99,6% by mass, min. Acidity 3 10 6by mass, max. Water content 10
20、10 6by mass, max. Non-volatile residue 0,01 % by mass, max. Suspended matter or sediment None visible Table 2 Physical properties of HFC 236fa Property Units Value Molecular mass 152 Boiling point at 1,013 bar (absolute) C 1,4 Freezing point C 103 Critical temperature C 124,9 Critical pressure bar a
21、bs 32,00 Critical volume cm 3 /mol 274,0 Critical density kg/m 3 551,3 Vapour pressure 20 C bar abs 2,296 Liquid density 20 C kg/m 3 1 377 Saturated vapour density 20 C kg/m 3 15,58 Specific volume of superheated vapour at 1,013 bar and 20 C m 3 /kg 0,1529 Chemical formula CF 3 CH 2 CF 3 Hexafluorop
22、ropane Chemical name 4.2 Use of HFC 236fa systems HFC 236fa 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 various levels of con
23、centration. These are based on methods shown in ISO 14520-1:2015, 7.6. The extinguishing concentrations and design concentrations for various types of hazard are shown in Table 4. Concentrations for other fuels are shown in Table 5.2 ISO 2016 All rights reserved ISO 14520-11:2016(E) Table 3 HFC 236f
24、a total flooding quantity Tempera- ture T C Specific vapour volume S HFC 236fa mass requirements per unit volume of protected space, m/V (kg/m 3 ) Design concentration (by volume) m 3 /kg 5 % 6 % 7 % 8 % 9 % 10 % 11 % 12 % 13 % 14 % 15 % 0 0,141 3 0,372 5 0,451 7 0,532 7 0,615 4 0,699 9 0,786 3 0,87
25、4 7 0,965 1 1,057 5 1,152 1 1,248 9 5 0,144 2 0,365 0 0,442 7 0,522 0 0,603 1 0,686 0 0,770 6 0,857 2 0,945 8 1,036 4 1,129 1 1,224 0 10 0,147 1 0,357 9 0,434 0 0,511 8 0,591 3 0,672 5 0,755 5 0,840 4 0,927 3 1,016 1 1,107 0 1,200 0 15 0,149 9 0,351 0 0,425 7 0,502 0 0,579 9 0,659 6 0,741 0 0,824 3
26、0,909 5 0,996 6 1,085 7 1,176 9 20 0,152 8 0,344 4 0,417 7 0,492 5 0,569 0 0,647 2 0,727 1 0,808 8 0,892 3 0,977 8 1,065 2 1,154 8 25 0,155 7 0,338 0 0,410 0 0,483 4 0,558 5 0,635 2 0,713 6 0,793 8 0,875 8 0,959 7 1,045 5 1,133 4 30 0,158 6 0,331 9 0,402 5 0,474 6 0,548 3 0,623 7 0,700 7 0,779 4 0,8
27、59 9 0,942 3 1,026 6 1,112 8 35 0,161 5 0,326 0 0,395 3 0,466 2 0,538 6 0,612 5 0,688 2 0,765 5 0,844 6 0,925 5 1,008 2 1,093 0 40 0,164 3 0,320 3 0,388 4 0,458 0 0,529 1 0,601 8 0,676 1 0,752 1 0,829 8 0,909 2 0,990 6 1,073 8 45 0,167 2 0,314 7 0,381 7 0,450 1 0,520 0 0,591 4 0,664 5 0,739 1 0,815
28、5 0,893 6 0,973 5 1,055 3 50 0,170 1 0,309 4 0,375 2 0,442 5 0,511 2 0,581 4 0,653 2 0,726 6 0,801 7 0,878 5 0,957 0 1,037 5 55 0,173 0 0,304 3 0,369 0 0,435 1 0,502 7 0,571 7 0,642 3 0,714 5 0,788 3 0,863 8 0,941 1 1,020 2 60 0,175 9 0,299 3 0,363 0 0,428 0 0,494 5 0,562 4 0,631 8 0,702 8 0,775 4 0
29、,849 7 0,925 7 1,003 5 This information refers only to the product HFC-236fa and may not represent any other products containing 1,1,1,3,3,3-hexafluoropropane 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 protect
30、ed 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 area;S is the specific volume (m
31、3 /kg); the specific volume of superheated HFC 236fa vapour at a pressure of 1,013 bar may be approximated by the formulaS = k 1+k 2 Twherek 1= 0,141 3k 2= 0,000 6c is the concentration (%); i.e. the volumetric concentration of HFC 236fa in air at the temperature indicated and a pressure of 1,013 ba
32、r absolute. ISO 2016 All rights reserved 3 ISO 14520-11:2016(E) Tempera- ture T C Specific vapour volume S HFC 236fa mass requirements per unit volume of protected space, m/V (kg/m 3 ) Design concentration (by volume) m 3 /kg 5 % 6 % 7 % 8 % 9 % 10 % 11 % 12 % 13 % 14 % 15 % 65 0,178 7 0,294 5 0,357
33、 1 0,421 1 0,486 5 0,553 3 0,621 6 0,691 5 0,762 9 0,836 0 0,910 8 0,987 3 70 0,181 6 0,289 8 0,351 4 0,414 4 0,478 8 0,544 5 0,611 8 0,680 5 0,750 8 0,822 7 0,896 3 0,971 6 75 0,184 5 0,285 3 0,346 0 0,408 0 0,471 3 0,536 0 0,602 2 0,669 9 0,739 1 0,809 9 0,882 3 0,956 5 80 0,187 4 0,2809 0,340 6 0
34、,401 7 0,464 1 0,527 8 0,593 0 0,659 6 0,727 7 0,797 4 0,868 8 0,941 8 85 0,190 3 0,276 6 0,335 5 0,395 6 0,457 0 0,519 8 0,584 0 0,649 6 0,716 7 0,785 4 0,855 6 0,927 5 90 0,193 1 0,272 5 0,330 5 0,389 7 0,450 2 0,512 1 0,575 3 0,639 9 0,706 0 0,773 7 0,842 9 0,913 7 95 0,196 0 0,268 5 0,325 6 0,38
35、4 0 0,443 6 0,504 5 0,566 8 0,630 5 0,695 7 0,762 3 0,830 5 0,900 3 This information refers only to the product HFC-236fa and may not represent any other products containing 1,1,1,3,3,3-hexafluoropropane as a component. Symbols:m/V is the agent mass requirements (kg/m 3 ); i.e. mass, m, in kilograms
36、 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 temperature in
37、 the hazard area;S is the specific volume (m 3 /kg); the specific volume of superheated HFC 236fa vapour at a pressure of 1,013 bar may be approximated by the formulaS = k 1+k 2 Twherek 1= 0,141 3k 2= 0,000 6c is the concentration (%); i.e. the volumetric concentration of HFC 236fa in air at the tem
38、perature indicated and a pressure of 1,013 bar absolute.Table 3 (continued) 4 ISO 2016 All rights reserved ISO 14520-11:2016(E) Table 4 HFC 236fa reference extinguishing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) Heptane (room te
39、st)6,5 7, 59,8 Surface class A Wood Crib PMMA PP ABS5,0 6,8 6,8 6,88,8 Higher Hazard Class A See Note 4 9,3 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 concent
40、ration 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 multipl
41、ied 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 desi
42、gn 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 be
43、 achieved and allowed when validated by test reports from internationally recognized laboratories. Table 5 HFC 236fa extinguishing and design concentrations for other fuels Fuel Extinguishment % by volume Minimum design % by volume Acetone 6,7 8,7 Ethanol 7, 8 10,1 Ethyl acetate Kerosene 6,8 6,5 8,8
44、 8,5 Methanol Propane 8,4 7, 2 10,9 9,4 Toluene 6,5 8,5 NOTE 1 Extinguishing concentrations for all Class B fuels listed were derived in accordance with ISO 14520-1:2015, Annex B. NOTE 2 Minimum design values have been increased to the minimum design concentration established for heptane in accordan
45、ce with ISO 14520-1:2015, 7.5.1. 5 Safety of personnel Any hazard to personnel created by the discharge of HFC 236fa shall be considered in the design of the system. Potential hazards can arise from the following: a) the extinguishant itself; ISO 2016 All rights reserved 5 ISO 14520-11:2016(E) b) th
46、e combustion products of the fire; c) breakdown products of the extinguishant resulting from exposure to fire. For minimum safety requirements, see ISO 14520-1:2015, Clause 5. Toxicological information for HFC 236fa is shown in Table 6. Table 6 Toxicological information for HFC 236fa Property Value
47、% by volume ALC 47, 5 No observed adverse effect level (NOAEL) 10 Lowest observed adverse effect level (LOAEL) 15 NOTE 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 result in pressu
48、res exceeding container specifications at the maximum design temperature. For an example, see Table 7. Exceeding the maximum 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 coul
49、d adversely affect the integrity of the container assembly. The relationships between pressure and temperature are shown in Figure 1 for various levels of fill density. Table 7 25 bar storage container characteristics for HFC 236fa Property Unit Value Maximum fill density kg/m 3 1 202 Maximum container working pressure at 50 C bar 34 Superpressurization at 22 C bar 25 NOTE Reference should be made to Figure 1 for further data o
