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 978-0-626-21598-9 SANS 14520-1:2008Edition 2ISO 14520-1:2006Edition 2SOUTH AFRICAN NATIONAL STANDARD Gaseous fire-extinguishing systems Physical pro
4、perties and system design Part 1: General requirements This national standard is the identical implementation of ISO 14520-1:2006 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X1
5、91 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 14520-1:2008 Edition 2 ISO 14520-1:2006 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 detection a
6、nd 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 SANS 14520-1:2000 (edition 1). INTERNATIONALSTANDARDISO14520-1Second edition2
7、006-02-15Reference numberISO 14520-1:2006(E) ISO 2006Gaseous fire-extinguishing systems Physical properties and system design Part 1:General requirementsSystmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 1: Exigences gnralesSANS 14520-1:2008
8、This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-1:2006(E)ii ISO 2006 All rights reservedPDF disclaimerThis PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but s
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13、gPublished in SwitzerlandSANS 14520-1:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-1:2006(E) ISO 2006 All rights reserved iiiContents Page1 Scope 12 Normative references 23 Terms and definitions 24 Use and limitations 55 Safe
14、ty 76 System design . 107 Extinguishant system design . 168 Commissioning and acceptance 249 Inspection, maintenance, testing and training . 27Annex A (normative) Working documents . 30Annex B (normative) Determination of flame-extinguishing concentration of gaseousextinguishants by the cup burner m
15、ethod 32Annex C (normative) Fire extinguishment/area coverage fire test procedure for engineeredand pre-engineered extinguishing units 38Annex D (normative) Method of evaluating inerting concentration of a fire extinguishant 58Annex E (normative) Door fan test for determining of minimum hold time 60
16、Annex F (informative) System performance verification 75Annex G (informative) Safe personnel exposure guidelines 76Annex H (informative) Flow calculation implementation method and flow calculation verificationand testing for approvals 83SANS 14520-1:2008This s tandard may only be used and printed by
17、 approved subscription and freemailing clients of the SABS .ISO 14520-1:2006(E)iv ISO 2006 All rights reservedForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies(ISO member bodies). The work of preparing International Standards is n
18、ormally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in t
19、he work. ISO collaborates closely with the InternationalElectrotechnical 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 technical committees is to prepare In
20、ternational Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of th
21、e elements of this document may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 14520-1 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting,Subcommittee SC 8, Gaseous media and firefighting
22、 systems using gas.This second edition cancels and replaces the first edition (ISO 14520-1:2000), which has been technicallyrevised.Annex C has been extensively revised to include polymeric sheet fuel array fire tests polymethyl methacrylate(PMMA), polypropylene (PP) and acrylonitrile-butadiene-styr
23、ene (ABS). These tests are designed to moreclosely represent plastic fuel hazards such as may be encountered in information technology,telecommunications and process control facilities.Annex E has been re-structured to accommodate lighter-than-air gases and to provide means for dealing withnon-stand
24、ard (as opposed to geometrically regular) hazard enclosures.Also incorporated in this revision of ISO 14520-1 are safe personnel exposure guidelines. Annex G, recognizingphysiologically based pharmacokinetic (PBPK) modelling and hypoxic guidelines to define safe humanexposure limits.ISO 14520 consis
25、ts of the following parts, under the general title Gaseous fire-extinguishing systems Physical properties and system design: Part 1: General requirements Part 2: CF I extinguishant Part 5: FK-5-1-12 extinguishant Part 6: HCFC Blend A extinguishant Part 8: HFC 125 extinguishant Part 9: HFC 227ea exti
26、nguishant Part 10: HFC 23 extinguishant Part 11: HFC 236fa extinguishant Part 12: IG-01 extinguishant Part 13: IG-100 extinguishant3SANS 14520-1:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-1:2006(E) ISO 2006 All rights reser
27、ved v Part 14: IG-55 extinguishant Part 15: IG-541 extinguishantParts 3, 4 and 7, which dealt with FC-2-1-8, FC-3-1-10 and HCFC 124 extinguishants, respectively, have beenwithdrawn, as these types are no longer manufactured.SANS 14520-1:2008This s tandard may only be used and printed by approved sub
28、scription and freemailing clients of the SABS .ISO 14520-1:2006(E)vi ISO 2006 All rights reservedIntroductionFire fighting systems covered in this part of ISO 14520 are designed to provide a supply of gaseousextinguishing medium for the extinction of fire.Several different methods of supplying extin
29、guishant to, and applying it at, the required point of discharge for fireextinction have been developed in recent years, and there is a need for dissemination of information onestablished systems and methods. This part of ISO 14520 has been prepared to meet this need.In particular, new requirements
30、to eliminate the need to release extinguishants during testing andcommissioning procedures are included. These are linked to the inclusion of enclosure integrity testing.The requirements of this part of ISO 14520 are made in the light of the best technical data known to the workinggroup at the time
31、of writing but, since a wide field is covered, it has been impracticable to consider everypossible factor or circumstance that might affect implementation of the recommendations.It has been assumed in the preparation of this part of ISO 14520 that the execution of its provisions is entrustedto peopl
32、e appropriately qualified and experienced in the specification, design, installation, testing, approval,inspection, operation and maintenance of systems and equipment, for whose guidance it has been prepared,and who can be expected to exercise a duty of care to avoid unnecessary release of extinguis
33、hant.Attention is drawn to the Montreal Protocol on substances that deplete the ozone layer.It is important that the fire protection of a building or plant be considered as a whole. Gaseous extinguishantsystems form only a part, though an important part, of the available facilities, but it should no
34、t be assumed thattheir adoption necessarily removes the need to consider supplementary measures, such as the provision ofportable fire extinguishers or other mobile appliances for first aid or emergency use, or to deal with specialhazards.Gaseous extinguishants have for many years been a recognized
35、effective medium for the extinction ofinflammable liquid fires and fires in the presence of electrical and ordinary Class A hazards, but it should not beforgotten, in the planning of comprehensive schemes, that there may be hazards for which these media are notsuitable, or that in certain circumstan
36、ces or situations there may be dangers in their use requiring specialprecautions.Advice on these matters can be obtained from the appropriate manufacturer of the extinguishant or theextinguishing system. Information may also be sought from the appropriate fire authority, the health and safetyauthori
37、ties and insurers. In addition, reference should be made as necessary to other national standards andstatutory regulations of the particular country.It is essential that fire fighting equipment be carefully maintained to ensure instant readiness when required.Routine maintenance is liable to be over
38、looked or given insufficient attention by the owner of the system. It is,however, neglected at peril to the lives of occupants of the premises and at the risk of crippling financial loss.The importance of maintenance cannot be too highly emphasized. Installation and maintenance should only bedone by
39、 qualified personnel.Inspection preferably by a third party, should include an evaluation that the extinguishing system continues toprovide adequate protection for the risk (protected zones as well as state of the art can change over time).The test protocol contained in Annex C of this part of ISO 1
40、4520 was developed by a special working group ofISO/TC 21/SC 8. Annex C deals with the tests for determination of the extinguishing concentrations and systemperformance and they are designed in such a way to allow individual installers to use his/her/system and carryout all of the extinguishing test
41、s. The need for the tests presented in Annex C was established by the fact thatthe previously used Class A fire test involved wood crib, heptane pan and heptane can test fires in an enclosureof , and did not necessarily indicate extinguishing concentrations suitable for the protection of plastic fue
42、l100 m3SANS 14520-1:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-1:2006(E) ISO 2006 All rights reserved viihazards such as may be encountered in information technology, telecommunications and process controlfacilities.As a co
43、nsequence of the above, the current Annex C of this part of ISO 14520 has been revised as describedin the Foreword.Specific parts 3, 4 and 7 have been withdrawn on the basis that the extinguishing media have not beencommercialized, and a new agent specific part 5 has been introduced to cover FK-5-1-
44、12(dodecafluoro-2-methylpentan-3-one) systems.SANS 14520-1:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 14520-1:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNAT
45、IONAL STANDARD ISO 14520-1:2006(E) ISO 2006 All rights reserved 1Gaseous fire-extinguishing systems Physical properties and system design Part 1:General requirements1ScopeThis part of ISO 14520 specifies requirements and gives recommendations for the design, installation, testing,maintenance and saf
46、ety of gaseous fire fighting systems in buildings, plant or other structures, and thecharacteristics of the various extinguishants and types of fire for which they are a suitable extinguishingmedium.It covers total flooding systems primarily related to buildings, plant and other specific application
47、s, utilizingelectrically non-conducting gaseous fire extinguishants that do not leave a residue after discharge and for whichthere are sufficient data currently available to enable validation of performance and safety characteristics by anappropriate independent authority. This part of ISO 14520 is
48、not applicable to explosion suppression.This part of ISO 14520 is not intended to indicate approval of the extinguishants listed therein by theappropriate authorities, as other extinguishants may be equally acceptable. CO2is not included as it is coveredby other International Standards.This part of
49、ISO 14520 is applicable to the extinguishants listed in Table 1. It is essential that it be used inconjunction with the separate parts of ISO 14520 for specific extinguishants, as cited in Table 1.Table 1 Listed extinguishantExtinguishant Chemical Formula CAS No.International StandardCF3l Trifluoroiodomethane CF3l 2314-97-8 ISO 14520-2FK-5-1-12 Dodecafluoro-2-methylpentan-3-one CF3CF2C(O)CF(CF3)2756-13-8 ISO 14520-5HCFC Blend AHCFC-123 Dichlorotrifluoroethane CHCl2CF3306-83-2HCFC-22 Chlorodifluoromethane C
