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 978-0-626-21101-1 SANS 14520-10:2008Edition 2ISO 14520-10:2005Edition 2SOUTH AFRICAN NATIONAL STANDARD Gaseous fire-extinguishing systems Physical p
4、roperties and system design Part 10: HFC 23 extinguishant This national standard is the identical implementation of ISO 14520-10:2005 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Ba
5、g X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 14520-10:2008 Edition 2 ISO 14520-10:2005 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 detec
6、tion 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 14520-10:2000 (edition 1). Reference numberISO 14520-10:2005(E
7、)ISO 2005INTERNATIONAL STANDARD ISO14520-10Second edition2005-12-15Gaseous fire-extinguishing systems Physical properties and system design Part 10: HFC 23 extinguishant Systmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 10: Agent extincteur
8、 HFC 23 SANS 14520-10:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-10:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but sha
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13、Web www.iso.org Published in Switzerland ii ISO 2005 All rights reservedSANS 14520-10:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-10:2005(E) ISO 2005 All rights reserved iiiForeword ISO (the International Organization for St
14、andardization) 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 has the rig
15、ht 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. International
16、 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. Publication as a
17、n 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 rights. ISO
18、14520-10 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 14520-10:2000), which has been technically revised. ISO 14520
19、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: HFC 227e
20、a 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, respectively, have
21、been withdrawn, as these types are no longer manufactured. SANS 14520-10:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 14520-10:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the
22、 SABS .INTERNATIONAL STANDARD ISO 14520-10:2005(E) ISO 2005 All rights reserved 1Gaseous fire-extinguishing systems Physical properties and system design Part 10: HFC 23 extinguishant 1 Scope This part of ISO 14520 gives specific requirements for gaseous fire-extinguishing systems, with respect to t
23、he HFC 23 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at a nominal pressure of 41 bar without nitrogen superpressurization. This does not preclude the use of other systems. 2 Normative references The follow
24、ing 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 systems Physical
25、 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 23 shall comply with the specification according to Table 1. HFC 23 is
26、a colourless, almost odourless, electrically non-conductive gas with a density approximately 2,4 times that of air. The physical properties are given in Table 2. HFC 23 extinguishes fires mainly by physical means, but also by some chemical means. 1) To be published. (Revision of ISO 14520-1:2000) SA
27、NS 14520-10:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-10:2005(E) 2 ISO 2005 All rights reservedTable 1 Specification for HFC 23 Property Requirement Purity 99,6 % (mol/mol), min. Acidity 3 106by mass, max. Water content 10
28、 106by mass, max. Non-volatile residue 0,01 % by mass, max. Suspended matter or sediment None visible Table 2 Physical properties of HFC 23 Property Unit Value Molecular mass 70 Boiling point at 1,013 bar (absolute) C 82,0 Freezing point C 155,2 Critical temperature C 25,9 Critical pressure bar abs
29、a48,36 Critical volume cm3/mol 133 Critical density kg/m3525 Vapour pressure 20 C bar abs a41,80 Liquid density 20 C kg/m3806,6 Saturated vapour density 20 C kg/m3263,0 Specific volume of superheated vapour at 1,013 bar and 20 C m3/kg 0,3409 Chemical formula CHF3Chemical name Trifluoromethane a1 bar
30、 = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2. 4.2 Use of HFC 23 systems HFC 23 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 space are shown in Table 3 for various leve
31、ls 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 acetone heptane, methanol and toluene in Table 5, and inerting concentrations in
32、 Table 6. 2) To be published. (Revision of ISO 14520-1:2000) SANS 14520-10:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-10:2005(E) ISO 2005 All rights reserved 3Table 3 HFC 23 total flooding quantity HFC 23 mass requirements
33、per unit volume of protected space, m/V (kg/m3) This information refers only to HFC 23, and does not represent any other products containing trifluoromethane as a component. Temperature T Specific vapour volume S Design concentration (by volume) C m3/kg 10 % 12 % 14 % 15 % 16 % 17 % 18 % 20 % 22 % 2
34、4 % 60 0,2428 0,4576 0,5616 0,6705 0,7268 0,7845 0,8436 0,9041 1,0297 1,1617 1,300655 0,2492 0,4459 0,5472 0,6533 0,7081 0,7644 0,8219 0,8809 1,0032 1,1318 1,267250 0,2555 0,4349 0,5337 0,6371 0,6907 0,7455 0,8016 0,8591 0,9785 1,1039 1,236045 0,2617 0,4246 0,5211 0,6221 0,6743 0,7278 0,7826 0,8388
35、0,9553 1,0778 1,206740 0,2680 0,4146 0,5088 0,6074 0,6585 0,7107 0,7643 0,8191 0,9328 1,0524 1,178335 0,2742 0,4052 0,4973 0,5937 0,6436 0,6947 0,7470 0,8006 0,9117 1,0286 1,151730 0,2803 0,3964 0,4865 0,5808 0,6296 0,6795 0,7307 0,7831 0,8919 1,0062 1,126625 0,2865 0,3878 0,4760 0,5682 0,6160 0,664
36、8 0,7149 0,7662 0,8726 0,9845 1,102220 0,2926 0,3797 0,4660 0,5564 0,6031 0,6510 0,7000 0,7502 0,8544 0,9639 1,079315 0,2987 0,3720 0,4565 0,5450 0,5908 0,6377 0,6857 0,7349 0,8370 0,9443 1,057210 0,3047 0,3647 0,4475 0,5343 0,5792 0,6251 0,6722 0,7204 0,8205 0,9257 1,03645 0,3108 0,3575 0,4388 0,52
37、38 0,5678 0,6129 0,6590 0,7063 0,8044 0,9075 1,01610 0,3168 0,3507 0,4304 0,5139 0,5570 0,6013 0,6465 0,6929 0,7891 0,8903 0,99685 0,3229 0,3441 0,4223 0,5042 0,5465 0,5899 0,6343 0,6798 0,7742 0,8735 0,978010 0,3289 0,3378 0,4146 0,4950 0,5365 0,5791 0,6227 0,6674 0,7601 0,8576 0,960115 0,3349 0,33
38、18 0,4072 0,4861 0,5269 0,5688 0,6116 0,6555 0,7465 0,8422 0,942920 0,3409 0,3259 0,4000 0,4775 0,5177 0,5587 0,6008 0,6439 0,7334 0,8274 0,926325 0,3468 0,3204 0,3932 0,4694 0,5089 0,5492 0,5906 0,6330 0,7209 0,8133 0,910630 0,3528 0,3149 0,3865 0,4614 0,5002 0,5399 0,5806 0,6222 0,7086 0,7995 0,89
39、5135 0,3588 0,3097 0,3801 0,4537 0,4918 0,5309 0,5708 0,6118 0,6968 0,7861 0,880140 0,3647 0,3047 0,3739 0,4464 0,4839 0,5223 0,5616 0,6019 0,6855 0,7734 0,865945 0,3707 0,2997 0,3679 0,4391 0,4760 0,5138 0,5525 0,5922 0,6744 0,7609 0,851950 0,3766 0,2950 0,3621 0,4323 0,4686 0,5058 0,5439 0,5829 0,
40、6638 0,7489 0,838555 0,3826 0,2904 0,3564 0,4255 0,4612 0,4978 0,5353 0,5737 0,6534 0,7372 0,825460 0,3885 0,2860 0,3510 0,4190 0,4542 0,4903 0,5272 0,5650 0,6435 0,7260 0,812865 0,3944 0,2817 0,3457 0,4128 0,4474 0,4830 0,5193 0,5566 0,6339 0,7151 0,800770 0,4004 0,2775 0,3406 0,4066 0,4407 0,4757
41、0,5115 0,5482 0,6244 0,7044 0,7887m/V is the agent mass requirement (in kilograms per cubic metre); 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);
42、 i.e. the enclosed volume minus the fixed structures impervious to extinguishant; 100cVmcS=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 specific volume of superheated HFC 23 vapour at a pressur
43、e of 1,013 bar may be approximated by 12Sk kT=+ where k1= 0,316 4; k2= 0,001 2 c is the concentration (in percent); i.e. the volumetric concentration of HFC 23 in air at the temperature indicated, and a pressure of 1,013 bar absolute. SANS 14520-10:2008This s tandard may only be used and printed by
44、approved subscription and freemailing clients of the SABS .ISO 14520-10:2005(E) 4 ISO 2005 All rights reservedTable 4 HFC 23 reference extinguishing and design concentrations Fuel Extinguishment % by volume Minimum design % by volume Class B Heptane (cup burner) Heptane (room test) 12,6 12,3 16,4 Su
45、rface Class A Wood crib PMMA PP ABS 10,5 12,5 12,5 12,4 16,3 Higher Hazard Class A a 16,3 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 concentration for the Class B fuel is th
46、e 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
47、 4 extinguishment values, the minimum design concentration for Surface Class A shall be that of Higher Hazard Class A. See ISO 14520-1: 3), 7.5.1.3, for guidance on Class A fuels. The extinguishing and design concentrations for room-scale test fires are for informational purposes only. Lower and hig
48、her extinguishing concentrations than those shown for room-scale test fires may be achieved and 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
49、the Class B minimum design concentration. Table 5 HFC 23 extinguishing and design concentrations for other fuels Fuel Extinguishment % by volume Minimum design % by volume Acetone 13,2 17,2 Ethanol Ethyl acetate Kerosene 16,1 13,4 13,2 20,9 17,4 17,2 Methanol Propane 18,2 14,2 23,7 18,5 Toluene 12,6 16,4 Extinguishing concentrations for all Class B fuels listed were derived in accordance with ISO 14520-1: 3), Annex B. Minimum design values have been increa
