1、 ISO 2016 Gaseous fire-extinguishing systems Physical properties and system design Part 9: HFC 227ea extinguishant Systmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 9: Agent extincteur HFC 227ea INTERNATIONAL STANDARD ISO 14520-9 Third edit
2、ion 2016-10-01 Reference number ISO 14520-9:2016(E) ISO 14520-9:2016(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 b
3、y 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 C
4、P 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 14520-9:2016(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 227ea systems 2 5 Safety of
5、 personnel . 5 6 System design 5 6.1 Fill density. 5 6.2 Superpressurization . 6 6.3 Extinguishant quantity . 6 7 Environmental properties 9 ISO 2016 All rights reserved iii Contents Page ISO 14520-9:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation
6、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 committee. I
7、nternational 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
8、 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, Part 2 (se
9、e 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 docu
10、ment 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 an
11、d 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, Equip
12、ment 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 14520-9:2006), which has been technically revised with the following changes: added reference to the 50 bar system in Scop
13、e; added reference to the 50 bar system in 6.1; added reference to the 50 bar system in 6.2; added Table 10 for 50 bar storage container characteristics data; added Figure 3, pressure vs temperature chart for 50 bar system; added Clause 7. A list of all parts in the ISO 14520 series can be found on
14、the ISO website.iv ISO 2016 All rights reserved INTERNATIONAL ST ANDARD ISO 14520-9:2016(E) Gaseous fire-extinguishing systems Physical properties and system design Part 9: HFC 227ea extinguishant 1 Scope This document contains specific requirements for gaseous fire-extinguishing systems, with respe
15、ct to the HFC 227ea extinguishant. It includes details of physical properties, specification, usage and safety aspects. This document covers systems operating at nominal pressures of 25 bar, 42 bar and 50 bar with nitrogen propellant. This does not preclude the use of other systems. 2 Normative refe
16、rences The following documents 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)
17、 applies. ISO 14520-1:2015, Gaseous 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
18、 standardization at the following 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 HFC 227ea shall comply with the specification shown in Table 1. HFC 227ea
19、is a colourless, almost odourless, electrically non-conductive gas, with a density approximately six times that of air. The physical properties are shown in Table 2. HFC 227ea extinguishes fires mainly by physical means, but also by some chemical means. ISO 2016 All rights reserved 1 ISO 14520-9:201
20、6(E) Table 1 Specification for HFC 227ea Property Requirement Purity 99,6 % by mass, min. Acidity 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 227ea Property Units Value M
21、olecular mass 170 Boiling point at 1,013 bar (absolute) C -16,4 Freezing point C -127 Critical temperature C 101,7 Critical pressure bar abs 29,26 Critical volume cm 3 /mol 274 Critical density kg/m 3 573 Vapour pressure 20 C bar abs 3,90 Liquid density 20 C kg/m 3 1 410 Saturated vapour density 20
22、C kg/m 3 31,035 Specific volume of superheated vapour at 1,013 bar and 20 C m 3 /kg 0,137 4 Chemical formula CF 3 CHFCF 3 Heptafluoropropane Chemical name 4.2 Use of HFC 227ea systems HFC 227ea total flooding systems may be used for extinguishing fires of all classes within the limits specified in I
23、SO 14520-1:2015, Clause 4. The extinguishant requirements 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 ha
24、zards are shown in Table 4. Concentrations for other fuels are shown in Table 5 and inerting concentrations are shown in Table 6.2 ISO 2016 All rights reserved ISO 14520-9:2016(E) Table 3 HFC 227ea total flooding quantity Tempera- ture T C Specific vapour volume S HCF 227ea mass requirements per uni
25、t volume of protected space, m/V (kg/m 3 ) Design concentration (by volume) m 3 /kg 6 % 7 % 8 % 9 % 10 % 11 % 12 % 13 % 14 % 15 % 10 0,1215 0,5254 0,6196 0,7158 0,8142 0,9147 1,0174 1,1225 1,2301 1,3401 1,4527 5 0,1241 0,5142 0,6064 0,7005 0,7967 0,8951 0,9957 1,0985 1,2038 1,3114 1,4216 0 0,1268 0,
26、5034 0,5936 0,6858 0,7800 0,8763 0,9748 1,0755 1,1785 1,2839 1,3918 5 0,1294 0,4932 0,5816 0,6719 0,7642 0,8586 0,9550 1,0537 1,1546 1,2579 1,3636 10 0,1320 0,4834 0,5700 0,6585 0,7490 0,8414 0,9360 1,0327 1,1316 1,2328 1,3364 15 0,1347 0,4740 0,5589 0,6457 0,7344 0,8251 0,9178 1,0126 1,1096 1,2089
27、1,3105 20 0,1373 0,4650 0,5483 0,6335 0,7205 0,8094 0,9004 0,9934 1,0886 1,1859 1,2856 25 0,1399 0,4564 0,5382 0,6217 0,7071 0,7944 0,8837 0,9750 1,0684 1,1640 1,2618 30 0,1425 0,4481 0,5284 0,6104 0,6943 0,7800 0,8676 0,9573 1,0490 1,1428 1,2388 35 0,1450 0,4401 0,5190 0,5996 0,6819 0,7661 0,8522 0
28、,9402 1,0303 1,1224 1,2168 40 0,1476 0,4324 0,5099 0,5891 0,6701 0,7528 0,8374 0,9239 1,0124 1,1029 1,1956 45 0,1502 0,4250 0,5012 0,5790 0,6586 0,7399 0,8230 0,9080 0,9950 1,0840 1,1751 50 0,1527 0,4180 0,4929 0,5694 0,6476 0,7276 0,8093 0,8929 0,9784 1,0660 1,1555 55 0,1553 0,4111 0,4847 0,5600 0,
29、6369 0,7156 0,7960 0,8782 0,9623 1,0484 1,1365 60 0,1578 0,4045 0,4770 0,5510 0,6267 0,7041 0,7832 0,8641 0,9469 1,0316 1,1183 65 0,1604 0,3980 0,4694 0,5423 0,6167 0,6929 0,7707 0,8504 0,9318 1,0152 1,1005 70 0,1629 0,3919 0,4621 0,5338 0,6072 0,6821 0,7588 0,8371 0,9173 0,9994 1,0834 75 0,1654 0,3
30、859 0,4550 0,5257 0,5979 0,6717 0,7471 0,8243 0,9033 0,9841 1,0668 80 0,1679 0,3801 0,4482 0,5178 0,5890 0,6617 0,7360 0,8120 0,8898 0,9694 1,0509 85 0,1704 0,3745 0,4416 0,5102 0,5803 0,6519 0,7251 0,8000 0,8767 0,9551 1,0354 90 0,1730 0,3690 0,4351 0,5027 0,5717 0,6423 0,7145 0,7883 0,8638 0,9411
31、1,0202 95 0,1755 0,3638 0,4290 0,4956 0,5636 0,6332 0,7044 0,7771 0,8516 0,9277 1,0057 100 0,1780 0,3587 0,4229 0,4886 0,5557 0,6243 0,6945 0,7662 0,8396 0,9147 0,9916 N O T E T h i s i n f o r m a t i o n r e f e r s o n l y t o t h e p r o d u c t H F C - 2 2 7 e a a n d d o e s n o t r e p r e s
32、e n t a n y o t h e r p r o d u c t s c o n t a i n i n g 1,1,1,2,3,3,3-heptafluoropropane 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 the indicated concentration at the temperat
33、ure 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 volume of superheated HFC 227ea vapour at a pr
34、essure of 1,013 bar may be approximated by the formulaS = k 1+k 2 Twherek 1= 0,126 9k 2= 0,000 513c is th e co n ce n trati o n ( % ) ; i.e. th e v o l um etri c co n ce n trati o n o f HFC 2 2 7 ea in air at th e te m pe rature in di cated an d a pressure of 1,013 bar absolute. ISO 2016 All rights
35、reserved 3 ISO 14520-9:2016(E) Table 4 HFC 227ea reference extinguishing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) Heptane (room test)6,7 6,99,0 Surface Class A Wood Crib PMMA PP ABS4,9 6,1 6,1 6,17,9 Higher Hazard Class A See N
36、ote 4 8,5 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 burner or room test heptane ext
37、inguishment 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, the minimum design concentrat
38、ion 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 Class A fuels. In Table 4, t
39、he 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 internationally recognized laboratories.
40、Table 5 HFC 227ea extinguishing and design concentrations for other fuels Fuel Extinguishment % by volume Minimum design % by volume Acetone 6,7 8,7 Ethanol Ethyl acetate 8,4 6,7 10,9 8,7 Ethylene glycol Kerosene 7, 8 6,1 10,1 7,9 Methanol Propane 9,5 7,4 12,4 9,6 Toluene 4,9 6,4 NOTE Extinguishing
41、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, 7.5.1.4 ISO 2016 All rights reserved ISO 14520-9:2016(E) T
42、able 6 HFC 227ea inerting and design concentrations Fuel Inertion % by volume Minimum design % by volume Isobutane 11,3 12,4 1-Chloro-1,1-difluoroethane (HCFC 141b) 6,7 8,7 1,1-Difluoroethane (HFC 152a) 8,6 9,5 Difluoromethane (HFC 32) 6,7 8,7 Ethylene oxide 13,6 15,0 Methane 8,0 8,8 Pentane 11,6 12
43、,8 Propane 11,6 12,8 NOTE Inerting concentrations were derived in accordance with the requirements of ISO 14520-1:2015, Annex D and 7.5.2. 5 Safety of personnel Any hazard to personnel created by the discharge of HFC 227ea shall be considered in the design of the system. Potential hazards can arise
44、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 14520-1:2015, Clause 5. Toxicological information for HFC 227ea is shown in Table 7. Table 7 T
45、oxicological information for HFC 227ea Property Value % by volume ALC 80 at 20 % O 2 No observed adverse effect level (NOAEL) 9,0 Lowest observed adverse effect level (LOAEL) 10,5 NOTE ALC is the approximate lethal concentration for a rat population during a 4-h exposure. 6 System design 6.1 Fill de
46、nsity The fill density of the container shall not exceed the values given in Table 8, Table 9, and Table 10 for 25 bar, 42 bar or 50 bar systems. 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
47、 small increases in temperature, which could adversely affect the integrity of the container assembly. The relationships between pressure and temperature are shown in Figure 1 and Figure 2 for various levels of fill density. ISO 2016 All rights reserved 5 ISO 14520-9:2016(E) Table 8 25 bar storage c
48、ontainer characteristics for HFC 227ea Property Unit Value Maximum fill density kg/m 3 1 150 Maximum container working pressure at 50 C bar 34 Superpressurization at 21 C bar 25 NOTE Reference should be made to Figure 1 for further data on pressure/temperature relationships. Table 9 42 bar storage c
49、ontainer characteristics for HFC 227ea Property Unit Value Maximum fill density kg/m 3 1 150 Maximum container working pressure at 50 C bar 62 Superpressurization at 21 C bar 42 NOTE Reference should be made to Figure 2 for further data on pressure/temperature relationships. Table 10 50 bar storage container characteristics for HFC 227ea Property Unit Value Maximum fill density kg/m 3 1 050 Maximum container working pressure at 50 C bar 59 Supe
