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 978-0-626-21102-8 SANS 14520-11:2008Edition 2ISO 14520-11:2005Edition 2SOUTH AFRICAN NATIONAL STANDARD Gaseous fire-extinguishing systems Physical p
4、roperties and system design Part 11: HFC 236fa extinguishant This national standard is the identical implementation of ISO 14520-11:2005 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 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 14520-11:2008 Edition 2 ISO 14520-11:2005 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 21C, Fire safety Fixed fire de
6、tection 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 2008. This SANS document supersedes SABS ISO 14520-11:2000 (edition 1). Reference numberISO 14520-11:20
7、05(E)ISO 2005INTERNATIONAL STANDARD ISO14520-11Second edition2005-12-15Gaseous 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 ext
8、incteur HFC 236fa SANS 14520-11:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-11:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or view
9、ed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in
10、this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable f
11、or use by ISO member bodies. In the unlikely event that a problem relating to it is found, please 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
12、, electronic or mechanical, including photocopying and microfilm, without permission in writing 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 copyrig
13、htiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reservedSANS 14520-11:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-11:2005(E) ISO 2005 All rights reserved iiiForeword ISO (the International Organizat
14、ion for Standardization) is a worldwide 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 h
15、as the right to be represented on 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. Int
16、ernational Standards are drafted 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. Public
17、ation as an International Standard 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 ri
18、ghts. ISO 14520-11 was prepared 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 14520-11:2000), which has been technically revised.
19、ISO 14520 consists of the following 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
20、: HFC 227ea extinguishant Part 10: 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, respectiv
21、ely, have been withdrawn, as these types are no longer manufactured. SANS 14520-11:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 14520-11:2008This s tandard may only be used and printed by approved subscription and freemailing clie
22、nts of the SABS .INTERNATIONAL STANDARD ISO 14520-11:2005(E) ISO 2005 All rights reserved 1Gaseous fire-extinguishing systems Physical properties and system design Part 11: HFC 236fa extinguishant 1 Scope This part of ISO 14520 gives specific requirements for gaseous fire-extinguishing systems, with
23、 respect to the HFC 236fa extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to 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 r
24、eferences 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-extinguish
25、ing 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 HFC 236fa shall comply with the specification according
26、 to Table 1. HFC 236fa is a colourless, almost odourless, electrically non-conductive gas with a density approximately five times that of air. The physical properties are given in Table 2. HFC 236fa extinguishes fires mainly by physical means, but also by some chemical means. 1) To be published. (Re
27、vision of ISO 14520-1:2000) SANS 14520-11:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-11:2005(E) 2 ISO 2005 All rights reservedTable 1 Specification for HFC 236fa Property Requirement Purity 99,6 % (mol/mol), min. Acidity 3
28、106by mass, max. Water content 10 106by mass, max. Non-volatile residue 0,01 % by mass, max. Suspended matter or sediment None visible Table 2 Physical properties of HFC 236fa Property Unit Value Molecular mass 152 Boiling point at 1,013 bar (absolute) aC 1,4 Freezing point C 103 Critical temperatur
29、e C 124,9 Critical pressure bar abs a32,00 Critical volume cm3/mol 274,0 Critical density kg/m3551,3 Vapour pressure 20 C bar abs a2,296 Liquid density 20 C kg/m31 377 Saturated vapour density 20 C kg/m315,58 Specific volume of superheated vapour at 1,013 bar and 20 C m3/kg 0,1529 Chemical formula C
30、HF3CH2CF3Chemical name Hexafluoropropane a1 bar = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2. 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: 2), Clause 4. The extinguishant requirements per volume of
31、protected space are given 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 various types of hazard are given in Table 4, and concentrations for other fuels in Table 5. 2) To be publ
32、ished. (Revision of ISO 14520-1:2000) SANS 14520-11:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-11:2005(E) ISO 2005 All rights reserved 3Table 3 HFC 236fa total flooding quantity HFC 236fa mass requirements per unit volume o
33、f protected space, m/V (kg/m3) This information refers only to HFC 236fa, and may not represent any other products containing 1,1,1,3,3,3-hexafluoropropane as a component. Temperature T Specific vapour volume S Design concentration (by volume) C m3/kg 5 % 6 % 7 % 8 % 9 % 10 % 11 % 12 % 13 % 14 % 15
34、% 0 0,1413 0,3725 0,4517 0,5327 0,6154 0,6999 0,7863 0,8747 0,9651 1,0575 1,1521 1,2489 5 0,1442 0,3650 0,4427 0,5220 0,6031 0,6860 0,7706 0,8572 0,9458 1,0364 1,1291 1,2240 10 0,1471 0,3579 0,4340 0,5118 0,5913 0,6725 0,7555 0,8404 0,9273 1,0161 1,1070 1,2000 15 0,1499 0,3510 0,4257 0,5020 0,5799 0
35、,6596 0,7410 0,8243 0,9095 0,9966 1,0857 1,1769 20 0,1528 0,3444 0,4177 0,4925 0,5690 0,6472 0,7271 0,8088 0,8923 0,9778 1,0652 1,1548 25 0,1557 0,3380 0,4100 0,4834 0,5585 0,6352 0,7136 0,7938 0,8758 0,9597 1,0455 1,1334 30 0,1586 0,3319 0,4025 0,4746 0,5483 0,6237 0,7007 0,7794 0,8599 0,9423 1,026
36、6 1,1128 35 0,1615 0,3260 0,3953 0,4662 0,5386 0,6125 0,6882 0,7655 0,8446 0,9255 1,0082 1,0930 40 0,1643 0,3203 0,3884 0,4580 0,5291 0,6018 0,6761 0,7521 0,8298 0,9092 0,9906 1,0738 45 0,1672 0,3147 0,3817 0,4501 0,5200 0,5914 0,6645 0,7391 0,8155 0,8936 0,9735 1,0553 50 0,1701 0,3094 0,3752 0,4425
37、 0,5112 0,5814 0,6532 0,7266 0,8017 0,8785 0,9570 1,0375 55 0,1730 0,3043 0,3690 0,4351 0,5027 0,5717 0,6423 0,7145 0,7883 0,8638 0,9411 1,0202 60 0,1759 0,2993 0,3630 0,4280 0,4945 0,5624 0,6318 0,7028 0,7754 0,8497 0,9257 1,0035 65 0,1787 0,2945 0,3571 0,4211 0,4865 0,5533 0,6216 0,6915 0,7629 0,8
38、360 0,9108 0,9873 70 0,1816 0,2898 0,3514 0,4144 0,4788 0,5445 0,6118 0,6805 0,7508 0,8227 0,8963 0,9716 75 0,1845 0,2853 0,3460 0,4080 0,4713 0,5360 0,6022 0,6699 0,7391 0,8099 0,8823 0,9565 80 0,1874 0,2809 0,3406 0,4017 0,4641 0,5278 0,5930 0,6596 0,7277 0,7974 0,8688 0,9418 85 0,1903 0,2766 0,33
39、55 0,3956 0,4570 0,5198 0,5840 0,6496 0,7167 0,7854 0,8556 0,9275 90 0,1931 0,2725 0,3305 0,3897 0,4502 0,5121 0,5753 0,6399 0,7060 0,7737 0,8429 0,9137 95 0,1960 0,2685 0,3256 0,3840 0,4436 0,5045 0,5668 0,6305 0,6957 0,7623 0,8305 0,9003 m/V is the agent mass requirement (in kilograms per cubic me
40、tre); i.e. mass, m, in kilograms 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 (in cubic metres); i.e. the enclosed volume minus the fixed structures impervious to extinguishant 100cVmcS=T is
41、 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 specific volume of superheated HFC 236fa vapour at a pressure of 1,013 bar may be approximated by 12Sk kT=+ where k1= 0,141 3; k2= 0,000 6 c is the conc
42、entration (in percent); i.e. the volumetric concentration of HFC 236fa in air at the temperature indicated, and a pressure of 1,013 bar absolute. SANS 14520-11:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-11:2005(E) 4 ISO 200
43、5 All rights reservedTable 4 HFC 236fa reference extinguishing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) Heptane (room test) 6,5 12,3 9,8 Surface Class A Wood crib PMMA PP ABS 5,0 6,8 6,8 6,8 8,8 Higher Hazard Class A a 9,3 The
44、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 concentration for the Class B fuel is the higher value of the heptane cup burner or room test heptane extinguishment concentration mul
45、tiplied 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 o
46、f Higher Hazard Class A. See ISO 14520-1: 3), 7.5.1.3, 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 an
47、d allowed when validated by test reports from internationally recognized laboratories. aThe 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. Table 5 HFC 236fa extinguishing and design concentr
48、ations for other fuels Fuel Extinguishment % by volume Minimum design % by volume Acetone 6,7 9,8 Ethanol 7,8 10,1 Ethyl acetate Kerosene 6,8 6,5 9,8 9,8 Methanol Propane 8,4 7,2 10,9 9,8 Toluene 6,5 Extinguishing concentrations for all Class B fuels listed were derived in accordance with ISO 14520-
49、1: 3), Annex B. Minimum design values have been increased to the minimum design concentration established for heptane in accordancewith ISO 14520-1: 3), 7.5.1. 3) To be published. (Revision of ISO 14520-1:2000) SANS 14520-11:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-11:2005(E) ISO 2005 All rights reserved 55 Safety of personnel Any hazard to personnel created by the discharge of HFC 236fa
