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1、 Reference number ISO 14520-15:2005(E) ISO 2005 INTERNATIONAL STANDARD ISO 14520-15 Second edition 2005-12-15 Gaseous fire-extinguishing systems Physical properties and system design Part 15: IG-541 extinguishant Systmes dextinction dincendie utilisant des agents gazeux Proprits physiques et concept
2、ion des systmes Partie 15: Agent extincteur IG-541 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 08:01:30 MDTNo reproduction or networking permitted without license from IHS -,
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6、dress given below. ISO 2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or IS
7、Os member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org ii ISO 2005 All rights reserved Copyright International Organization for Standardization Provided by IHS under l
8、icense with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 08:01:30 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14520-15:2005(E) ISO 2005 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a wo
9、rldwide federation 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 o
10、n that committee. 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. International Standards are drafted
11、 in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standa
12、rd requires approval by at least 75 % of the member bodies casting a vote. 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. ISO 14520-15 was prepared
13、by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 8, Gaseous media and firefighting systems using gas. This second edition cancels and replaces the first edition (ISO 14520-15:2000), which has been technically revised. ISO 14520 consists of the follow
14、ing parts, under the general title Gaseous fire-extinguishing systems Physical properties and system design: Part 1: General requirements Part 2: CF3I 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 1
15、0: HFC 23 extinguishant Part 11: HFC 236fa extinguishant Part 12: IG-01 extinguishant 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 the
16、se types are no longer manufactured. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 08:01:30 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright
17、International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 08:01:30 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 14520-15:2005(E) ISO 2005 All
18、rights reserved 1 Gaseous fire-extinguishing systems Physical properties and system design Part 15: IG-541 extinguishant 1 Scope This part of ISO 14520 gives specific requirements for gaseous fire-extinguishing systems, with respect to the IG-541 extinguishant. It includes details of physical proper
19、ties, specification, usage and safety aspects and is applicable to 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; however, design data for other pressures were not available at time of publication. 2 Normative referen
20、ces The following referenced documents are indispensable for the application 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: 1 ), Gaseous fire-extinguishing
21、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 Extinguishant IG-541 shall comply with the specification according to Tab
22、le 1. IG-541 is a colourless, odourless, electrically non-conductive 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, with the following mixture specification (based on 8 % carbon dioxide wi
23、th tolerance of 5 %). a) Carbon dioxide: range of 7,6 % to 8,4 %. b) Argon: range of 37,2 % to 42,8 %. c) Nitrogen: range of 48,8 % to 55,2 %. NOTE Individual container or batch analysis is based on carbon dioxide measurement only. 1) To be published. (Revision of ISO 14520-1:2000) Copyright Interna
24、tional Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 08:01:30 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14520-15:2005(E) 2 ISO 2005 All rights reserved The physical
25、 properties are given in Table 2. IG-541 extinguishes fires mainly by a reduction of the oxygen concentration in the atmosphere of the hazard enclosure. Table 1 Specification for IG-541 Property Requirement Argon Nitrogen Carbon dioxide Purity 99,997 % by volume, min. 99,99 % by volume, min. 99,5 %
26、by volume, min. Water content 4 106 by mass, max. 5 106 by mass, max. 10 106 by mass, max. Oxygen 3 106 by mass, max. 3 106 by mass, max. 10 106 by mass, max. Only principal contaminants are shown. Other measurements may include hydrocarbons, CO, NO, NO2. Most are 20 106. Table 2 Physical properties
27、 of IG-541 Property Unit Value Molecular mass 34,0 Boiling point at 1,013 bar (absolute) a C 196 Freezing point C 78,5 Critical temperature C Critical pressure bar abs a Critical volume cm3/mol Critical density kg/m3 Vapour pressure 20 C bar abs a 152 Liquid density 20 C kg/m3 Saturated vapour densi
28、ty 20 C kg/m3 Specific volume of superheated vapour at 1,013 bar and 20 C m3/kg 0,697 Chemical formulas N2 52 % by volume Ar 40 % by volume CO2 8 % by volume Chemical names Nitrogen Argon Cabon dioxide a 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2. 4.2 Use of IG-541 systems IG-541 total flooding syste
29、ms may be used for extinguishing fires of all classes within the limits specified in ISO 14520-1: 2), 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 given in ISO 14520-1 2), 7.6. The extingui
30、shing concentrations and design concentrations for n-heptane and Surface Class A hazards are given in Table 4, concentrations for other fuels in Table 5 and inerting concentrations in Table 6. 2) To be published. (Revision of ISO 14520-1:2000) Copyright International Organization for Standardization
31、 Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 08:01:30 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14520-15:2005(E) ISO 2005 All rights reserved 3 Table 3 IG-541 total flooding quantity IG-541 volum
32、e requirements per unit volume of protected space, V/V (m3/m3) This information refers only to IG-541, and may not represent any other products containing argon, nitrogen or carbon dioxide as components. Temperature T Specific vapour volume S Design concentration (by volume) C m3/kg 34 % 38 % 42 % 4
33、6 % 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 0,669 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 0,89
34、8 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 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
35、 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 0,882 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
36、 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 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 0,4
37、21 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 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
38、,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 0,381 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 V/V is the agent volume requirement (in cubic metres per cubic metre); i.e. the quantity Q (in c
39、ubic metres) of agent required at a reference 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: RR Qm S= where SR is the specific reference volume (in cubic metres per kilogram); i.e. the specific
40、vapour volume at the filling reference temperature for superheated IG-541 vapour at a pressure of 1,013 bar which may be approximated by the formula: R12R SkkT=+ where k1 = 0,657 99; k2 = 0,002 239; TR is the reference temperature (in degrees Celsius), i.e. filling temperature (20 C in the table); 1
41、00 In 100 V m Sc = V is the net volume of hazard (in cubic metres); i.e. the enclosed volume minus the fixed structures impervious to extinguishant; T is the temperature (in degrees Celsius); i.e. the design temperature in the hazard area; S is the specific volume (in cubic metres per kilogram); the
42、 specific volume of superheated IG-541 vapour at a pressure of 1,013 bar may be approximated by 12 SkkT=+ c is the concentration (in percent); i.e. the volumetric concentration of IG-541 in air at the temperature indicated, and a pressure of 1,013 bar absolute. Copyright International Organization f
43、or Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 08:01:30 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14520-15:2005(E) 4 ISO 2005 All rights reserved Table 4 IG-541 reference extingui
44、shing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) Heptane (room test) 31,7 29,6 41,2 Surface Class A Wood crib PMMA PP ABS 28,2 30,7 30,6 30,7 39,9 Higher Hazard Class A a 39,9 The extinguishment values for the Class B and the Sur
45、face Class A fuels are determined by testing in accordance with ISO 14520-1:3), Annexes B and C. The minimum design concentration for the Class B fuel is the higher value of the heptane cup burner or room test heptane extinguishment concentration multiplied by 1,3. The minimum design concentration f
46、or 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 extinguishment values, the minimum design concentration for Surface Class A shall be that of Higher Hazard Class A. See ISO 14520-1: 3), 7.5.
47、1.3, for guidance on Class A fuels. 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 inte
48、rnationally recognized laboratories. a The minimum design concentration for Higher Hazard Class A fuels shall be the higher of the surface Class A or 95 % of the Class B minimum design concentration. 3) To be published. (Revision of ISO 14520-1:2000) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 0