SANS 14520-9-2008 Gaseous fire-extinguishing systems - Physical properties and system design Part 9 HFC 227ea extinguishant《气体灭火系统 物理性能及系统设计 第9部分 HFC 227ea灭火剂》.pdf

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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 978-0-626-21100-4 SANS 14520-9:2008Edition 2ISO 14520-9:2006Edition 2SOUTH AFRICAN NATIONAL STANDARD Gaseous fire-extinguishing systems Physical pro

4、perties and system design Part 9: HFC 227ea extinguishant This national standard is the identical implementation of ISO 14520-9:2006 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag

5、 X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 14520-9:2008 Edition 2 ISO 14520-9:2006 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 detectio

6、n 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 14520-9:2000 (edition 1). INTERNATIONALSTANDARDISO14520-9Second e

7、dition2006-02-15Reference numberISO 14520-9:2006(E) ISO 2006Gaseous fire-extinguishing systems Physical properties and system design Part 9:HFC 227ea extinguishantSystmes dextinction dincendie utilisant des agents gazeux Proprits physiques et conception des systmes Partie 9: Agent extincteur HFC 227

8、eaSANS 14520-9:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-9:2006(E)ii ISO 2006 All rights reservedPDF disclaimerThis PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be prin

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11、ble for use by ISO member bodies. In theunlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any me

12、ans,electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below orISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightis

13、o.orgWeb www.iso.orgPublished in SwitzerlandSANS 14520-9:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-9:2006(E) ISO 2006 All rights reserved iiiForewordISO (the International Organization for Standardization) is a worldwide f

14、ederation of national standards bodies(ISO member bodies). The work of preparing International Standards is normally 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 commi

15、ttee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance

16、with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approv

17、al 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 patentrights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 14520-9 was prepared by Technical Committee

18、 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 14520-9:2000), which has been technicallyrevised.ISO 14520 consists of the following parts, under the genera

19、l 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 extinguishant Part 10: HFC 23 extinguishant Par

20、t 11: HFC 236fa extinguishant Part 12: IG-01 extinguishant Part 13: IG-100 extinguishant 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 manufa

21、ctured.3SANS 14520-9:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ivSANS 14520-9:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 14520-9:2006(E) I

22、SO 2006 All rights reserved 1Gaseous fire-extinguishing systems Physical properties and system design Part 9:HFC 227ea extinguishant1ScopeThis part of ISO 14520 gives specific requirements for gaseous fire-extinguishing systems, with respect to theHFC 227ea extinguishant. It includes details of phys

23、ical properties, specification, usage and safety aspects andis 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 referencesThe following referenced documents are indispensable for the a

24、pplication of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 14520-1:2006, Gaseous fire-extinguishing systems Physical properties and system design Part 1:General requirem

25、ents3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 14520-1 apply.4Characteristics and uses4.1 GeneralExtinguishant HFC 227ea shall comply with the specification according to Table 1.HFC 227ea is a colourless, almost odourless, electrically non-conduc

26、tive gas with a density approximately sixtimes that of air.The physical properties are given in Table 2.HFC 227ea extinguishes fires mainly by physical means, but also by some chemical means.SANS 14520-9:2008This s tandard may only be used and printed by approved subscription and freemailing clients

27、 of the SABS .ISO 14520-9:2006(E)2 ISO 2006 All rights reserved4.2 Use of HFC 227ea systemsHFC 227ea total flooding systems may be used for extinguishing fires of all classes within the limits specified inISO 14520-1:2006, Clause 4.The extinguishant requirements per volume of protected space are giv

28、en in Table 3 for various levels ofconcentration. These are based on methods given in ISO 14520-1:2006, 7.6.The extinguishing concentrations and design concentrations for n-heptane and Surface class A hazards aregiven in Table 4, those for other fuels in Table 5 and inerting concentrations in Table

29、6.Table 1 Specification for HFC 227eaProperty RequirementPurity by mass, min.Acidity by mass, max.Water content by mass, max.Non-volatile residue by mass, max.Suspended matter or sediment None visibleTable 2 Physical properties of HFC 227eaProperty Unit ValueMolecular mass 170Boiling point at 1,013

30、bar (absolute) aFreezing pointCritical temperature 101,7Critical pressure bar abs a29,26Critical volume cm3/mol 274Critical density kg/m3573Vapour pressure bar abs a3,90Liquid density kg/m31 410Saturated vapour density kg/m331,035Specific volume of superheated vapour at 1,013 bar and m3/kg 0,1374Che

31、mical formula CF3CHFCF3Chemical name Heptafluoropropanea; .99,6 %3 10610 1060,01 %C 16,4C 127C20C20C20C20C1 bar = 0,1 MPa = 105Pa 1 MPa = 1 N/mm2SANS 14520-9:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-9:2006(E) ISO 2006 All

32、 rights reserved 3Table 3 HFC 227ea total flooding quantityTemperature Specific vapour volume HFC 125 mass requirements per unit volume of protected space, (kg/m3) This information refers only to HFC 227ea, and may not represent any other products containing 1,1,1,2,3,3,3-heptafluoropropane as a com

33、ponent.Design concentration (by volume)m3/kg0,1215 0,5254 0,6196 0,7158 0,8142 0,9147 1,0174 1,1225 1,2301 1,3401 1,45270,1241 0,5142 0,6064 0,7005 0,7967 0,8951 0,9957 1,0985 1,2038 1,3114 1,42160 0,1268 0,5034 0,5936 0,6858 0,7800 0,8763 0,9748 1,0755 1,1785 1,2839 1,39185 0,1294 0,4932 0,5816 0,6

34、719 0,7642 0,8586 0,9550 1,0537 1,1546 1,2579 1,363610 0,1320 0,4834 0,5700 0,6585 0,7490 0,8414 0,9360 1,0327 1,1316 1,2328 1,336415 0,1347 0,4740 0,5589 0,6457 0,7344 0,8251 0,9178 1,0126 1,1096 1,2089 1,310520 0,1373 0,4650 0,5483 0,6335 0,7205 0,8094 0,9004 0,9934 1,0886 1,1859 1,285625 0,1399 0

35、,4564 0,5382 0,6217 0,7071 0,7944 0,8837 0,9750 1,0684 1,1640 1,261830 0,1425 0,4481 0,5284 0,6104 0,6943 0,7800 0,8676 0,9573 1,0490 1,1428 1,238835 0,1450 0,4401 0,5190 0,5996 0,6819 0,7661 0,8522 0,9402 1,0303 1,1224 1,216840 0,1476 0,4324 0,5099 0,5891 0,6701 0,7528 0,8374 0,9239 1,0124 1,1029 1

36、,195645 0,1502 0,4250 0,5012 0,5790 0,6586 0,7399 0,8230 0,9080 0,9950 1,0840 1,175150 0,1527 0,4180 0,4929 0,5694 0,6476 0,7276 0,8093 0,8929 0,9784 1,0660 1,155555 0,1553 0,4111 0,4847 0,5600 0,6369 0,7156 0,7960 0,8782 0,9623 1,0484 1,136560 0,1578 0,4045 0,4770 0,5510 0,6267 0,7041 0,7832 0,8641

37、 0,9469 1,0316 1,118365 0,1604 0,3980 0,4694 0,5423 0,6167 0,6929 0,7707 0,8504 0,9318 1,0152 1,100570 0,1629 0,3919 0,4621 0,5338 0,6072 0,6821 0,7588 0,8371 0,9173 0,9994 1,083475 0,1654 0,3859 0,4550 0,5257 0,5979 0,6717 0,7471 0,8243 0,9033 0,9841 1,066880 0,1679 0,3801 0,4482 0,5178 0,5890 0,66

38、17 0,7360 0,8120 0,8898 0,9694 1,050985 0,1704 0,3745 0,4416 0,5102 0,5803 0,6519 0,7251 0,8000 0,8767 0,9551 1,035490 0,1730 0,3690 0,4351 0,5027 0,5717 0,6423 0,7145 0,7883 0,8638 0,9411 1,020295 0,1755 0,3638 0,4290 0,4956 0,5636 0,6332 0,7044 0,7771 0,8516 0,9277 1,0057100 0,1780 0,3587 0,4229 0

39、,4886 0,5557 0,6243 0,6945 0,7662 0,8396 0,9147 0,9916is the agent mass requirement (in kilograms per cubic metre); i.e. mass, , in kilograms of agent required percubic metre of protected volume to produce the indicated concentration at the temperature specified;is the net volume of hazard (in cubic

40、 metres); i.e. the enclosed volume minus the fixed structures impervious toextinguishantis the temperature (in degrees Celsius); i.e. the design temperature in the hazard area;is the specific volume (in cubic metres per kilogram); the specific volume of superheated HFC 227ea vapour at apressure of 1

41、,013 bar may be approximated bywhere ; is the concentration (in percent); i.e. the volumetric concentration of HFC 227ea in air at the temperature indicated,and a pressure of 1,013 bar absolute.TSm/VC 6% 7% 8% 9% 10 % 11 % 12 % 13 % 14 % 15 %105m/V mVVm =parenleftBigc100 cparenrightBigVSTSS = k1+ k2

42、Tk1= 0,126 9 k2= 0,000 513cSANS 14520-9:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-9:2006(E)4 ISO 2006 All rights reservedTable 4 HFC 227ea reference extinguishing and design concentrationsFuel Extinguishment Minimum design

43、by volume by volumeClass BHeptane (cup burner) 6,7 9,0Heptane (room test) 6,9Surface Class AWood crib 4,9PMMA 6,1 7,9PP 6,1ABS 6,1Higher Hazard Class Aa8,5The extinguishment values for the Class B and the Surface Class A fuels are determined by testing in accordance withISO 14520-1:2006, Annexes B a

44、nd C.The minimum design concentration for the Class B fuel is the higher value of the heptane cup burner or room test heptaneextinguishment 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 ABSextinguishment c

45、oncentrations multiplied by 1,3. In the absence of any of the 4 extinguishment values, the minimum designconcentration for Surface Class A shall be that of Higher Hazard Class A.See ISO 14520-1:2006, 7.5.1.3, for guidance on Class A fuels.The extinguishing and design concentrations for room-scale te

46、st fires are for informational purposes only. Lower and higherextinguishing concentrations than those shown for room-scale test fires may be achieved and allowed when validated bytest reports from internationally recognized laboratories.aThe minimum design concentration for Higher Hazard Class A fue

47、ls shall be the higher of the Surface Class A or of the Class Bminimum design concentration.Table 5 HFC 227ea extinquishing and design concentrations for other fuelsFuel Inertion Minimum designby volume by volumeAcetone 6,7 8,7Ethanol 8,4 10,9Ethyl acetate 6,7 8,7Ethylene glycol 7,8 10,1Kerosene 6,1

48、 7,9Methanol 9,5 12,4Propane 7,4 9,6Toluene 4,9 6,4Extinguishing concentrations for Class B fuels derived in accordance with ISO 14520-1:2006, Annex B. Minimum designvalues have been increased to the minimum design concentration established for heptane in accordance withISO 14520-1:2006, 7.5.1.% %95

49、 % %SANS 14520-9:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 14520-9:2006(E) ISO 2006 All rights reserved 55 Safety of personnelAny hazard to personnel created by the discharge of HFC 227ea shall be considered in the design of thesystem.Potential hazards can arise from the following:a) the extinguishant itself;b) the combustion products of the fire;c) breakdown products of the extinguishant resulting from exposure to fire.