1、 ISO 2015 Gaseous fire-extinguishing systems Physical properties and system design Part 15: IG-541 extinguishant Systmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 15: Agent extincteur IG-541 INTERNATIONAL STANDARD ISO 14520-15 Third edition
2、 2015-02-15 Reference number ISO 14520-15:2015(E) ISO 14520-15:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or
3、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 Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 7
4、49 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 14520-15:2015(E)Contents Page 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 IG-541 systems . 2 5 Safety of per
5、sonnel . 6 6 System design 7 6.1 Fill pressure . 7 6.2 Superpressurization . 7 6.3 Extinguishant quantity . 8 7 Environmental Properties 8 ISO 2015 All rights reserved iii ISO 14520-15:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national sta
6、ndards 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. International or
7、ganizations, 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 intended for i
8、ts 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.iso.org/d
9、irectives). 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 will be in
10、 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 expressions r
11、elated to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information. The committee responsible for this document is ISO/TC 21, Equipment for fire protection and fire fig
12、hting, Subcommittee SC 8, Gaseous media firefighting systems using gas. This third edition cancels and replaces the second edition (ISO 14520-15:2005), which has been technically revised. ISO 14520 consists of the following parts, under the general title Gaseous fire-extinguishing systems Physical p
13、roperties and system design: Part 1: General requirements Part 2: CF 3 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 Part 10: HFC 23 extinguishant Part 11: HFC 236fa extinguishant Part 12: IG-01 exting
14、uishant Part 13: IG-100 extinguishant Part 14: IG-55 extinguishant Part 15: IG-541 extinguishant Parts 3, 4, and 7, which dealt with FC-2-1-8, FC-3-1-10, and HCFC 124 extinguishants, respectively, have been withdrawn, as these types are no longer manufactured.iv ISO 2015 All rights reserved Gaseous
15、fire-extinguishing systems Physical properties and system design Part 15: IG-541 extinguishant 1 Scope This part of ISO 14520 contains specific requirements for gaseous fire-extinguishing systems, with respect to the IG-541 extinguishant. It includes details of physical properties, specification, us
16、age, and safety aspects. This part of ISO 14520 covers systems operating at nominal pressures of 150 bar, 200 bar, and 300 bar at 15 C. This does not preclude the use of other systems, although design data for other pressures are not available at this time. 2 Normative reference The following docume
17、nts, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 14520-1:2006, Gaseous f
18、ire-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. 4 Characteristics and uses 4.1 General IG-541 is a colourless, odourless, electrically non-con
19、ductive gas with a density approximately the same as that of air. It is an inert gas mixture consisting nominally of 52 % nitrogen, 40 % argon, and 8 % carbon dioxide. The mixture specification for IG-541 (based on 8 % carbon dioxide with tolerance of 5 %) is as follows: a) carbon dioxide percentage
20、 range 7,6 % to 8,4 %; b) argon percentage range 37,2 % to 42,8 %; c) nitrogen percentage range 48,8 % to 55,2 %. Individual container or batch analysis is based on carbon dioxide measurement only. Extinguishant IG-541 shall comply with the specification shown in Table 1. The physical properties are
21、 shown in Table 2. INTERNATIONAL ST ANDARD ISO 14520-15:2015(E) ISO 2015 All rights reserved 1 ISO 14520-15:2015(E) IG-541 extinguishes fires mainly by a reduction of oxygen concentration in the atmosphere of the hazard enclosure. Table 1 Component gas specification for IG-541Argon Nitrogen Carbon d
22、ioxide Purity 99,997 % by volume, min. 99,99 % by volume, min. 99,5 % by volume, min. Moisture 4 10 6by mass, max. 5 10 6by mass, max. 10 10 6by mass, max. Oxygen 3 10 6by mass, max. 3 10 6by mass, max. 10 10 6by mass, max. NOTE Only principal contaminants are shown. Other measurements can include h
23、ydrocarbons, CO, NO, NO 2 . Most are 20 106. Table 2 Physical properties of IG-541 Property Units Value Molecular mass 34,0 Boiling point at 1,013 bar (absolute) C 196 Freezing point C 78,5 Critical temperature C Critical pressure bar abs Critical volume cm 3 /mol Critical density kg/m 3 Vapour pres
24、sure 20 C bar abs 152 Liquid density 20 C kg/m 3 Saturated vapour density 20 C kg/m 3 Specific volume of superheated vapour at 1,013 bar and 20 C m 3 /kg 0,706 Components N 252 % by volume Ar 40 % by volume CO 28 % by volume Chemical name Nitrogen/argon/carbon dioxide 4.2 Use of IG-541 systems IG-54
25、1 total flooding systems can be used for extinguishing fires of all classes within the limits specified in ISO 14520-1:2006, 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-
26、1:2006, 7.6. The extinguishing concentrations and design concentrations for heptane and surface class A hazards are shown in Table 4. Concentrations for other fuels are shown in Table 5, and inerting concentrations in Table 6.2 ISO 2015 All rights reserved ISO 14520-15:2015(E) Table 3 IG-541 total f
27、looding quantity Temperature T C Specific vapour volume S IG-541 volume requirements per unit volume of protected space, V/V (m 3 /m 3 ) Design concentration (by volume) m 3 /kg 34 % 38 % 42 % 46 % 50 % 54 % 58 % 62 % 40 0,5624 0,521 0,600 0,684 0,773 0,870 0,975 1,089 1,214 35 0,5743 0,511 0,587 0,
28、669 0,757 0,852 0,954 1,066 1,189 30 0,5863 0,500 0,575 0,656 0,742 0,834 0,935 1,044 1,165 25 0,5982 0,490 0,564 0,643 0,727 0,818 0,916 1,023 1,142 20 0,6102 0,481 0,553 0,630 0,713 0,802 0,898 1,003 1,119 15 0,6221 0,471 0,542 0,618 0,699 0,786 0,881 0,984 1,098 10 0,6341 0,463 0,532 0,606 0,686
29、0,772 0,864 0,966 1,077 5 0,6460 0,454 0,522 0,595 0,673 0,757 0,848 0,948 1,057 0 0,6580 0,446 0,513 0,584 0,661 0,744 0,833 0,931 1,038 5 0,6699 0,438 0,504 0,574 0,649 0,730 0,818 0,914 1,019 10 0,6819 0,430 0,495 0,564 0,638 0,717 0,804 0,898 1,001 15 0,6938 0,423 0,486 0,554 0,627 0,705 0,790 0
30、,882 0,984 20 0,7058 0,416 0,478 0,545 0,616 0,693 0,777 0,868 0,968 25 0,7177 0,409 0,470 0,536 0,606 0,682 0,764 0,853 0,951 30 0,7297 0,402 0,462 0,527 0,596 0,670 0,751 0,839 0,936 35 0,7416 0,395 0,455 0,518 0,586 0,660 0,739 0,826 0,921 40 0,7536 0,389 0,448 0,510 0,577 0,649 0,727 0,812 0,906
31、 45 0,7655 0,383 0,441 0,502 0,568 0,639 0,716 0,800 0,892 50 0,7775 0,377 0,434 0,494 0,559 0,629 0,705 0,787 0,878 55 0,7894 0,371 0,427 0,487 0,551 0,620 0,694 0,776 0,865 60 0,8014 0,366 0,421 0,480 0,543 0,610 0,684 0,764 0,852 65 0,8133 0,361 0,415 0,473 0,535 0,601 0,674 0,753 0,840 70 0,8253
32、 0,355 0,409 0,466 0,527 0,593 0,664 0,742 0,827 75 0,8372 0,350 0,403 0,459 0,519 0,584 0,655 0,731 0,816 80 0,8492 0,345 0,397 0,453 0,512 0,576 0,645 0,721 0,804 85 0,8611 0,341 0,392 0,446 0,505 0,568 0,636 0,711 0,793 90 0,8731 0,336 0,386 0,440 0,498 0,560 0,628 0,701 0,782 95 0,8850 0,331 0,3
33、81 0,434 0,491 0,553 0,619 0,692 0,772 100 0,8970 0,327 0,376 0,429 0,485 0,545 0,611 0,683 0,761 NOTE This information refers only to the product IG-541, and does not represent any other products contain- ing argon, nitrogen, or carbon dioxide as components. Symbols: V/V is the agent volume require
34、ments (m 3 /m 3 ); i.e. the quantity Q R (m 3 ) of agent required at a ref- erence temperature of 20 C and a pressure of 1,013 bar per cubic metre of protected volume to produce the indicated concentration at the temperature specified: ISO 2015 All rights reserved 3 ISO 14520-15:2015(E)S R where is
35、the specific reference volume (m 3 /kg); i.e. the specific vapour volume at the filling reference temperature for superheated IG-541 vapour at a pressure of 1,013 bar which can be approxi- mated by the formula: ; wherek 1 = 0,657 99; k 2= 0,002 39 is the reference temperature (C); i.e. filling tempe
36、rature (20 C in the table). 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 of the protected area; S is the specific volume (m 3 /kg); the specific volume of superheated IG-54
37、1 vapour at a pressure of 1,013 bar can be approximated by the formula: S = k 1+ k 2T where c is the concentration (%); i.e. the volumetric concentration of IG-541 in air at the temperature indi- cated, and a pressure of 1,013 bar absolute.Table 3 (continued) 4 ISO 2015 All rights reserved ISO 14520
38、-15:2015(E) Table 4 IG-541 reference extinguishing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) Heptane (room test)33,8 29,643,9 Surface class A Wood crib PMMA PP ABS28,2 30,7 30,6 30,739,9 Higher Hazard Class A See Note 4 41,7 NOT
39、E 1 The extinguishment values for the Class B and the Surface Class A fuels are determined by testing in accordance with ISO 14520-1:2006, 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 extinguishment c
40、oncentration 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 4 extinguish- ment values, the minimum design concentration for Surfa
41、ce Class A shall be that of Higher Hazard Class A. NOTE 4 Higher-Hazard Class A hazards are those having the characteristics described in the CAUTION state- ment of ISO 14520-1:2006, 7.5.1.3. The minimum design concentration for Higher Hazard Class A fuels shall be the higher of the Surface Class A
42、or 95 % of the Class B minimum design concentration. NOTE 5 See ISO 14520-1:2006, 7.5.1.3 for guidance on Class A fuels. NOTE 6 The extinguishing and design concentrations for room-scale test fires are for informational pur- poses only. Lower and higher extinguishing concentrations than those shown
43、for room-scale test fires can be achieved and allowed when validated by test reports from internationally recognized laboratories. Table 5 IG 541 extinguishing and design concentrations for other fuels Fuel Extinguishment % by volume Minimum design % by volume Acetone 31,7 41,2 Acetonitrile 31,7 41,
44、2 Avgas 100 31,7 41,2 Avtur (Jet A) 36,2 47,1 1-Butanol 37, 2 48,4 Cyclopentanone 42,1 54,7 Diesel No. 2 35,8 46,5 Diethlyl ether 34,9 45,4 Ethane 31,7 41,2 Ethanol 35,0 45,5 Ethly acetate 32,7 42,5 Ethylene 42,1 54,7 NOTE Extinguishing concentrations for all Class B fuels listed were derived in acc
45、ordance with ISO 14520-1:2006, Annex B. Minimum design values have been increased to the minimum design concentration established for heptane in accordance with ISO 14520-1:2006, 7.5.1. ISO 2015 All rights reserved 5 ISO 14520-15:2015(E) Fuel Extinguishment % by volume Minimum design % by volume Hex
46、ane 31,7 41,2 Isopropanol 31,7 41,2 Methanol 44,2 57, 5 Methyl ethyl ketone 35,8 46,5 Methyl isobutyl ketone 32,3 42,0 Octane 35,8 46,5 Pentane 37, 2 48,4 Petroleum ether 35,0 45,5 Propane 32,3 42,0 Regular gasoline 35,8 46,5 Toluene 31,7 41,2 Vinyl acetate 34,4 44,7 Vacuum pump oil 32,0 41,6 NOTE E
47、xtinguishing concentrations for all Class B fuels listed were derived in accordance with ISO 14520-1:2006, Annex B. Minimum design values have been increased to the minimum design concentration established for heptane in accordance with ISO 14520-1:2006, 7.5.1. Table 6 IG-541 inerting and design con
48、centrations Fuel Inerting Minimum design% by volume % by volume Methane 43,0 47, 3 Propane 49,0 53,9 NOTE Inerting concentrations were derived in accordance with the requirements of ISO 14520-1:2006, Annex D and 7.5.2. 5 Safety of personnel Any hazard to personnel created by the discharge of IG-541
49、shall be considered in the design of the system. Potential hazards can arise from the following: a) the extinguishant itself, by reduction in oxygen; and b) the combustion products of the fire. For minimum safety requirements, see ISO 14520-1:2006, Clause 5. Physiological information for IG-541 is shown in Table 7.Table 5 (continued) 6 ISO 2015 All rights reserved ISO 14
