1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21106-6 SANS 14520-15:2008 Edition 2 ISO 14520-15:2005 Edition 2SOUTH AFRICAN NATIONAL STANDARD Gaseous fire-extinguishing systems Physica
4、l properties and system design Part 15: IG-541 extinguishant This national standard is the identical implementation of ISO 14520-15:2005 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private
5、 Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 14520-15:2008 Edition 2 ISO 14520-15:2005 Edition 2 Table of changes Change No. Date Scope National forew
6、ord This South African standard was approved by National Committee SABS SC 21C, Fire safety Fixed fire detection and extinguishing systems, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in September
7、 2008. This SANS document supersedes SABS ISO 14520-15:2000 (edition 1). This standard may only be used and printed by approved subscription and freemailing clients of the SABS. Reference number ISO 14520-15:2005(E) ISO 2005INTERNATIONAL STANDARD ISO 14520-15 Second edition 2005-12-15 Gaseous fire-e
8、xtinguishing 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 SANS 14520-15:2008This standard may only be used and printed by approved
9、subscription and freemailing clients of the SABS.ISO 14520-15:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and instal
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12、ease inform the Central Secretariat at the address 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 writi
13、ng 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 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org ii ISO 2005 All rights reservedSANS 14520-15:2008This standard may
14、only be used and printed by approved subscription and freemailing clients of the SABS.ISO 14520-15:2005(E) ISO 2005 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepar
15、ing 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 organizations, governmental and non-governmental, in li
16、aison 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 in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of
17、 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 Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is
18、 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 by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting, Subc
19、ommittee 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 following parts, under the general title Gaseous fire-extinguishing systems Physical properti
20、es 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 extinguishant
21、 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. SANS 14520-15:2008This standard may only be used
22、 and printed by approved subscription and freemailing clients of the SABS.SANS 14520-15:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.INTERNATIONAL STANDARD ISO 14520-15:2005(E) ISO 2005 All rights reserved 1 Gaseous fire-extinguishing sy
23、stems 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 properties, specification, usage and safety aspects a
24、nd 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 references The following referenced documents are indi
25、spensable 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 systems Physical properties and system design P
26、art 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 Table 1. IG-541 is a colourless, odourless, electr
27、ically 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 with tolerance of 5 %). a) Carbon dioxide: range
28、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) SANS 14520-15:2008This standard may only be used and printed by
29、approved subscription and freemailing clients of the SABS.ISO 14520-15:2005(E) 2 ISO 2005 All rights reservedThe physical 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
30、IG-541 Property Requirement Argon Nitrogen Carbon dioxide Purity 99,997 % by volume, min. 99,99 % by volume, min. 99,5 % by volume, min. Water content 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. Only principal conta
31、minants are shown. Other measurements may include hydrocarbons, CO, NO, NO 2 . Most are 20 10 6 . Table 2 Physical properties of IG-541 Property Unit Value Molecular mass 34,0 Boiling point at 1,013 bar (absolute) aC 196 Freezing point C 78,5 Critical temperature C Critical pressure bar abs a Critic
32、al volume cm 3 /mol Critical density kg/m 3 Vapour pressure 20 C bar abs a152 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 0,697 Chemical formulas N 252 % by volume Ar 40 % by volume CO 28 % by volume Chemical nam
33、es Nitrogen Argon Cabon dioxide a1 bar = 0,1 MPa = 10 5Pa; 1 MPa = 1 N/mm 2 . 4.2 Use of IG-541 systems IG-541 total flooding systems 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 s
34、pace are shown in Table 3 for various levels of concentration. These are based on methods given in ISO 14520-1 2) , 7.6. The extinguishing 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 c
35、oncentrations in Table 6. 2) To be published. (Revision of ISO 14520-1:2000) SANS 14520-15:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 14520-15:2005(E) ISO 2005 All rights reserved 3 Table 3 IG-541 total flooding quantity IG-541 vol
36、ume requirements per unit volume of protected space, V/V (m 3 /m 3 ) 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 m 3 /kg 34 % 38
37、% 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 0,669 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,
38、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 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 0,9
39、14 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 0,882 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 3
40、5 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 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
41、,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 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
42、 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 0,381 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
43、 Q (in cubic 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 S Ris the specific reference volume (in cubic metres per kilogram); i.e. the
44、specific 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 k 1= 0,657 99; k 2= 0,002 239; T Ris the reference temperature (in degrees Celsius), i.e. filling temperature (20 C in the
45、 table); 100 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 kilo
46、gram); the 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. SANS 14520-15:2008This stan
47、dard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 14520-15:2005(E) 4 ISO 2005 All rights reservedTable 4 IG-541 reference extinguishing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) H
48、eptane (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 Surface Class A fuels are determined by testing in accordance with ISO 14520-1: 3) , Annexes B and C. The minimum design con
49、centration 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 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 extinguishment values, the minimum design concentration for Surface Class A shall be that
