1、 ISO 2015 Gaseous fire-extinguishing systems Physical properties and system design Part 1: General requirements Systmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 1: Exigences gnrales INTERNATIONAL STANDARD ISO 14520-1 Third edition 2015-12-
2、01 Reference number ISO 14520-1:2015(E) Corrected version 2016-04-01 ISO 14520-1:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise
3、 in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch.
4、de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 14520-1:2015(E)Foreword vi Introduction viii 1 Scope . 1 2 Normative references 2 3 Terms and definitions . 2 4 Use and limitations 6 4.1 General . 6 4.2 Extinguish
5、ants . 6 4.2.1 Environmental properties . 7 4.3 Electrostatic discharge . 7 4.4 Compatibility with other extinguishants . 7 4.5 Temperature limitations . 7 5 Safety 7 5.1 Hazard to personnel . 7 5.2 Safety precautions 8 5.2.1 General 8 5.2.2 For normally occupied areas . 8 5.2.3 For normally unoccup
6、ied areas10 5.2.4 For unoccupiable areas .10 5.3 Occupiable areas .10 5.4 Electrical hazards 11 5.5 Electrical earthing .11 5.6 Electrostatic discharge 11 6 System design .12 6.1 General 12 6.2 Extinguishant supply 12 6.2.1 Quantity 12 6.2.2 Quality 12 6.2.3 Container arrangement .12 6.2.4 Storage c
7、ontainers .12 6.3 Distribution .13 6.3.1 General.13 6.3.2 Piping 14 6.3.3 Fittings .14 6.3.4 Pipe and valve supports 15 6.3.5 Valves 16 6.3.6 Nozzles 16 6.3.7 Pressure reducing orifice assembly17 6.4 Detection, actuation and control systems.17 6.4.1 General.17 6.4.2 Automatic detection .17 6.4.3 Ope
8、rating devices .17 6.4.4 Control equipment 18 6.4.5 Operating alarms and indicators 18 6.4.6 Hold switches.18 7 Extinguishant system design 18 7.1 General 18 7.2 Specifications, plans and approvals .19 7.2.1 Specifications .19 7.2.2 Working documents .19 7.3 System flow calculations .19 7.3.1 Genera
9、l.19 ISO 2015 All rights reserved iii Contents Page ISO 14520-1:2015(E)7.3.2 Balanced and unbalanced system 19 7.3.3 Friction losses21 7.3.4 Pressure drop 21 7.3.5 Valves and fittings 21 7.3.6 Piping length 22 7.3.7 Drawings 22 7.3.8 Liquefied gases Specific requirements .22 7.4 Enclosures 22 7.5 Ex
10、tinguishant concentration requirements 22 7.5.1 Flame extinguishment . .22 7.5.2 Inerting 24 7.6 Total flooding quantity 24 7.6.1 General.24 7.6.2 Liquefied gases .24 7.6.3 Non-liquefied gas 24 7.7 Altitude adjustment .25 7.8 Duration of protection .25 7.9 System performance .26 7.9.1 Discharge time
11、 26 7.9.2 Extended discharge 26 8 Commissioning and acceptance .26 8.1 General 26 8.2 Tests .26 8.2.1 General.26 8.2.2 Enclosure check .27 8.2.3 Review of mechanical components 27 8.2.4 Review of enclosure integrity 28 8.2.5 Review of electrical components 28 8.2.6 Preliminary functional tests 29 8.
12、2.7 System functional operational test29 8.2.8 Remote monitoring operations (if applicable) .30 8.2.9 Control panel primary power source 30 8.2.10 Completion of functional tests 30 8.3 Completion certificate and documentation.30 9 Inspection, maintenance, testing and training.30 9.1 General 30 9.2 I
13、nspection .31 9.2.1 General.31 9.2.2 Container .31 9.2.3 Hose .31 9.2.4 Enclosures 31 9.3 Maintenance .32 9.3.1 General.32 9.3.2 Users programme of inspection .32 9.3.3 Service schedule 32 9.4 Training 32 Annex A (normative) Working documents 33 Annex B (normative) Determination of flame-extinguishi
14、ng concentration of gaseous extinguishants by the cup burner method .35 Annex C (normative) Fire extinguishment/area coverage fire test procedure for engineered and pre-engineered extinguishing units 41 Annex D (normative) Method of evaluating inerting concentration of a fire extinguishant .70 Annex
15、 E (normative) Door fan test for determining of minimum hold time .72 Annex F (informative) System performance verification .88 iv ISO 2015 All rights reserved ISO 14520-1:2015(E)Annex G (informative) Safe personnel exposure guidelines .89 Annex H (informative) Flow calculation implementation method
16、 and flow calculation verification and testing for approvals .96 Bibliography .100 ISO 2015 All rights reserved v ISO 14520-1:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing In
17、ternational 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 liaison
18、with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directi
19、ves, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some
20、 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarat
21、ions received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information abo
22、ut ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 8, Gaseous media and firefighting sy
23、stems using gas. This third edition cancels and replaces the second edition (ISO 14520-1:2006), which has been technically revised. It also incorporates ISO 14520-1:2006/Cor 1:2007 and ISO/TS 20885:2003. This corrected version of ISO 14520-1:2015 incorporates the following corrections. Foreword: the
24、 details of documents that ISO 14520-1:2015 cancels and replaces have been amended. 7.6.3: the numerator within brackets in Formula 4 has been corrected (from C to 100). C.4.1: the numerator within brackets in Formula C.2 has been corrected (from C to 100). The most important changes in the third ed
25、ition are as follows. Methods are given to calculate the effects of atmospheric pressure on the inert gases. The discharge time for inert gas agents has been increased from a maximum of 60 seconds to a maximum of 120 seconds for the protection of Class A hazards. The height at which agent concentrat
26、ions are to be held following a discharge, and during the hold time, has been revised to reflect the height of the protected hazard replacing the previous requirement of 10%, 50% and 90% of the enclosure height. Annexes B, C and E have been modified to reflect experience gained in the areas covered
27、by these Annexes, since the last edition. Annex H has been amended to reflect the content of what was previously ISO/TS 13075. Certain environmental data has been added in the specific agents parts of ISO 14520 and an explanation and advice on where additional information can be found has been added
28、 as Clause 4.2.1. ISO 14520 consists of the following parts, under the general title Gaseous fire-extinguishing systems Physical properties and system designvi ISO 2015 All rights reserved ISO 14520-1:2015(E) Part 1: General requirements Part 2: CF3I extinguishant Part 5: FK-5-1-12 extinguishant Par
29、t 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 Part 13: IG-100 extinguishant Part 14: IG-55 extinguishant Part 15: IG-541 extinguishant ISO 2015 All rights reser
30、ved vii ISO 14520-1:2015(E) Introduction Fire fighting systems covered in this part of ISO 14520 are designed to provide a supply of gaseous extinguishing medium for the extinction of fire. Several different methods of supplying extinguishant to, and applying it at, the required point of discharge f
31、or fire extinction have been developed in recent years, and there is a need for dissemination of information on established systems and methods. This part of ISO 14520 has been prepared to meet this need. The requirements of this part of ISO 14520 are made in the light of the best technical data kno
32、wn to the working group at the time of writing but, since a wide field is covered, it has been impracticable to consider every possible 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
33、of its provisions is entrusted to people 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
34、to avoid unnecessary release of extinguishant. 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 extinguishant systems form only a part, though an important part, o
35、f the available facilities, but it should not be assumed that their adoption necessarily removes the need to consider supplementary measures, such as the provision of portable fire extinguishers or other mobile appliances for first aid or emergency use, or to deal with special hazards. Gaseous extin
36、guishants have for many years been a recognized effective medium for the extinction of inflammable liquid fires and fires in the presence of electrical and ordinary Class A hazards, but it should not be forgotten, in the planning of comprehensive schemes, that there may be hazards for which these me
37、dia are not suitable, or that in certain circumstances or situations there may be dangers in their use requiring special precautions. Advice on these matters can be obtained from the appropriate manufacturer of the extinguishant or the extinguishing system. Information may also be sought from the ap
38、propriate fire authority, the health and safety authorities and insurers. In addition, reference should be made as necessary to other national standards and statutory regulations of the particular country. It is essential that fire-fighting equipment be carefully maintained to ensure instant readine
39、ss when required. Routine maintenance is liable to be overlooked 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 em
40、phasized. Installation and maintenance should only be done by qualified personnel. Inspection preferably by a third party, should include an evaluation that the extinguishing system continues to provide adequate protection for the risk (protected zones, as well as state of the art can change over ti
41、me).viii ISO 2015 All rights reserved INTERNATIONAL ST ANDARD ISO 14520-1:2015(E) Gaseous fire-extinguishing systems Physical properties and system design Part 1: General requirements 1 Scope This part of ISO 14520 specifies requirements and gives recommendations for the design, installation, testin
42、g, maintenance and safety of gaseous fire fighting systems in buildings, plants or other structures, and the characteristics of the various extinguishants and types of fire for which they are a suitable extinguishing medium. It covers total flooding systems primarily related to buildings, plants and
43、 other specific applications, utilizing electrically non-conducting gaseous fire extinguishants that do not leave a residue after discharge and for which there are sufficient data currently available to enable validation of performance and safety characteristics by an appropriate independent authori
44、ty. This part of ISO 14520 is not applicable to explosion suppression. This part of ISO 14520 is not intended to indicate approval of the extinguishants listed therein by the appropriate authorities, as other extinguishants may be equally acceptable. CO 2is not included as it is covered by other Int
45、ernational Standards. This part of ISO 14520 is applicable to the extinguishants listed in Table 1. It is essential that it be used in conjunction with the separate parts of ISO 14520 for specific extinguishants, as cited in Table 1. Table 1 Listed extinguishant Extinguishant Chemical Formula CAS No
46、 International Standard CF 3 l Trifluoroiodomethane CF 3 l 2314-97-8 ISO 14520-2 FK-5-1-12 Dodecafluoro-2-meth- ylpentan-3-one CF 3 CF 2 C(O)CF(CF 3 ) 2 756-13-8 ISO 14520-5 HCFC Blend A HCFC-123 Dichlorotrifluoroethane CHCl 2 CF 3 306-83-2 HCFC-22 Chlorodifluoromethane CHClF 2 75-45-6 ISO 14520-6
47、HCFC-124 Chlorotetrafluoroethane CFClFCF 3 2837-89-0 Isopropenyl-1-methylcy- clohexene C 10 H 16 5989-27-5 HFC 125 Pentafluoroethane CHF 2 CF 3 354-33-6 ISO 14520-8 HFC 227ea Heptafluoropropane CF 3 CHFCF 3 2252-84-8 ISO 14520-9 HFC 23 Trifluoromethane CHF 3 75-46-7 ISO 14520-10 HFC 236fa Hexafluoro
48、propane CF 3 CH 2 CF 3 27070-61-7 ISO 14520-11 IG-01 Argon Ar 74040-37-1 ISO 14520-12 IG-100 Nitrogen N 2 7727-37-9 ISO 14520-13Nitrogen (50 %) N 2 7727-37-9 IG-55 Argon (50 %) Ar 74040-37-1 ISO 14520-14 ISO 2015 All rights reserved 1 ISO 14520-1:2015(E) Extinguishant Chemical Formula CAS No. Intern
49、ational StandardNitrogen (52 %) N 2 7727-37-9 IG-541 Argon (40 %) Ar 74040-37-1 ISO 14520-15Carbon dioxide (8 %) CO2 124-38-9 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 14520-2, Gaseous fire-extinguishing systems Physical propertie
