1、DD ISO/TS12854:2009ICS 13.220.10NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWDRAFT FOR DEVELOPMENTGaseous media fire-extinguishing systems Physical propertiesand system design Scaling factors forClass B fuels otherthan heptaneThis Draft for Developmentwas published under the
2、authority of the StandardsPolicy and StrategyCommittee on 31 May2009. BSI 2009ISBN 978 0 580 65274 5Amendments/corrigenda issued since publicationDate CommentsDD ISO/TS 12854:2009National forewordThis Draft for Development is the UK implementation of ISO/TS12854:2009.This publication is not to be re
3、garded as a British Standard.It is being issued in the Draft for Development series of publications andis of a provisional nature. It should be applied on this provisional basis,so that information and experience of its practical application can beobtained.Comments arising from the use of this Draft
4、 for Development arerequested so that UK experience can be reported to the internationalorganization responsible for its conversion to an international standard.A review of this publication will be initiated not later than 3 years afterits publication by the international organization so that a deci
5、sion can betaken on its status. Notification of the start of the review period will bemade in an announcement in the appropriate issue of Update Standards.According to the replies received by the end of the review period,the responsible BSI Committee will decide whether to support theconversion into
6、 an international Standard, to extend the life of theTechnical Specification or to withdraw it. Comments should be sent tothe Secretary of the responsible BSI Technical Committee at BritishStandards House, 389 Chiswick High Road, London W4 4AL.The UK participation in its preparation was entrusted to
7、 TechnicalCommittee FSH/18/6, Gaseous extinguishing media and systems.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applica
8、tion.Compliance with a British Standard cannot confer immunityfrom legal obligations.DD ISO/TS 12854:2009Reference numberISO/TS 12854:2009(E)ISO 2009TECHNICAL SPECIFICATION ISO/TS12854First edition2009-03-15Gaseous media fire-extinguishing systems Physical properties and system design Scaling factor
9、s for Class B fuels other than heptane Matriel gaz extincteurs Proprits physiques pour Classe B carburantes autrement que heptane DD ISO/TS 12854:2009ISO/TS 12854:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed
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14、 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedDD ISO/TS 12854:2009ISO/TS 12854:2009(E) ISO 2009 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national stan
15、dards 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 right to be represented on that committee. International org
16、anizations, 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 Standards are drafted in accordance with the rules given
17、 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 an International Standard requires approval by at least 75
18、 % of the member bodies casting a vote. In other circumstances, particularly when there is an urgent market requirement for such documents, a technical committee may decide to publish other types of document: an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical
19、 experts in an ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the parent committee casting a vote; an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical committee and is accepted for publication if
20、it is approved by 2/3 of the members of the committee casting a vote. An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is confirmed, it is
21、reviewed again after a further three years, at which time it must either be transformed into an International Standard or be withdrawn. 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 identify
22、ing any or all such patent rights. ISO/TS 12854 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. DD ISO/TS 12854:2009ISO/TS 12854:2009(E) iv ISO 2009 All rights reservedIntroduction IS
23、O 14520-1:2006, 7.5.1.2 and 7.5.1.3 set out requirements for determining gaseous extinguishant design concentrations for Class A and Class B (heptane) fuels. For Class B fuels other than heptane, fuel-specific cup burner and pan fire (room) tests are required. This Technical Specification details an
24、 alternative scaling factor method for determining design concentrations for Class B fuels other than heptane. The purpose of this Technical Specification is to provide the user with a procedure for determining scaling factors, so that information and experience of its use in practice may be gathere
25、d and its requirements included in a future revision of ISO 14520-1. DD ISO/TS 12854:2009TECHNICAL SPECIFICATION ISO/TS 12854:2009(E) ISO 2009 All rights reserved 1Gaseous media fire-extinguishing systems Physical properties and system design Scaling factors for Class B fuels other than heptane 1 Sc
26、ope This Technical Specification establishes an alternative method to ISO 14520-1:2006, 7.5.1.2 for determining design concentrations applicable to various gaseous extinguishants for Class B fuels other than heptane. 2 Normative references The following referenced documents are indispensable for the
27、 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 14520-1:2006, Gaseous fire-extinguishing systems Physical properties and system design Part 1: General re
28、quirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 14520-1 apply. NOTE For the purposes of this Technical Specification, the term “bar” is taken to mean “gauge”, unless otherwise indicated. Concentrations or quantities expressed as a percenta
29、ge (%) are by volume, unless otherwise indicated. 4 Requirements in accordance with ISO 14520-1 The minimum Class B design concentration for each extinguishant shall be a demonstrated extinguishing concentration for each Class B fuel plus a safety factor of 1,3. The extinguishing concentration used
30、shall be that demonstrated by the cup burner test, carried out in accordance with the method set out in Annex B, that has been verified with the heptane pan tests detailed in ISO 14520-1:2006, C.6.2. For hazards involving multiple fuels, the value for the fuel requiring the greatest design concentra
31、tion shall be used. The extinguishing concentration shall be taken as the cup burner value or the heptane pan test value (see ISO 14520-1:2006, Annex C), whichever is greater. 5 Proposed scaling factor method As an alternative to Clause 4, the design concentration for Class B fuels other than heptan
32、e may be established using the extinguishing concentration determined in accordance with ISO 14520-1:2006, Annex B, multiplied by the scaling factor specific for the extinguishant and then multiplied by a safety factor of 1.3. DD ISO/TS 12854:2009ISO/TS 12854:2009(E) 2 ISO 2009 All rights reserved6
33、Procedure The scaling factor, fSF, for each extinguishant may be determined using the following procedure. For the extinguishant, tests in accordance with ISO 14520-1:2006, Annex C (0,25 m2pan with flammable liquid, 100 m3room) and ISO 14520-1:2006, Annex B, shall be carried out with heptane and at
34、least two other Class B fuels (methyl alcohol and acetone). For each fuel of interest, the relation of the extinguishing concentrations from the two test methods shall be calculated as given by Equation (1): E1SFE2cfc= (1) where cE1is the extinguishing concentration in accordance with ISO 14520-1:20
35、06, Annex C; cE2is the extinguishing concentration in accordance with ISO 14520-1:2006, Annex B. The scaling factor, fSF, for the extinguishant shall be the highest figure of these relations, but not less than 1. For each extinguishant, the scaling factor can be included in ISO 14520-2, ISO 14520-3,
36、 ISO 14520-4, ISO 14520-5, ISO 14520-6, ISO 14520-8, ISO 14520-9, ISO 14520-10, ISO 14520-11, ISO 14520-12, ISO 14520-13, ISO 14520-14 and ISO 14520-15. If a scaling factor is not available, a preliminary scaling factor of 1,15 shall be used. DD ISO/TS 12854:2009ISO/TS 12854:2009(E) ISO 2009 All rig
37、hts reserved 3Bibliography 1 ISO 14520-2, Gaseous fire-extinguishing systems Physical properties and system design Part 2: CF3I extinguishant 2 ISO 14520-3, Gaseous fire-extinguishing systems Physical properties and system design Part 3: FC-2-1-8 extinguishant 3 ISO 14520-4, Gaseous fire-extinguishi
38、ng systems Physical properties and system design Part 4: FC-3-1-10 extinguishant 4 ISO 14520-5, Gaseous fire-extinguishing systems Physical properties and system design Part 5: FK-5-1-12 extinguishant 5 ISO 14520-6, Gaseous fire-extinguishing systems Physical properties and system design Part 6: HCF
39、C Blend A extinguishant 6 ISO 14520-8, Gaseous fire-extinguishing systems Physical properties and system design Part 8: HFC 125 extinguishant 7 ISO 14520-9, Gaseous fire-extinguishing systems Physical properties and system design Part 9: HFC 227ea extinguishant 8 ISO 14520-10, Gaseous fire-extinguis
40、hing systems Physical properties and system design Part 10: HFC 23 extinguishant 9 ISO 14520-11, Gaseous fire-extinguishing systems Physical properties and system design Part 11: HFC 236fa extinguishant 10 ISO 14520-12, Gaseous fire-extinguishing systems Physical properties and system design Part 12
41、: IG-01 extinguishant 11 ISO 14520-13, Gaseous fire-extinguishing systems Physical properties and system design Part 13: IG-100 extinguishant 12 ISO 14520-14 Gaseous fire-extinguishing systems Physical properties and system design Part 14: IG-55 extinguishant 13 ISO 14520-15, Gaseous fire-extinguish
42、ing systems Physical properties and system design Part 15: IG-541 extinguishant DD ISO/TS 12854:2009ISO/TS 12854:2009(E) ICS 13.220.10 Price based on 3 pages ISO 2009 All rights reserved DD ISO/TS 12854:2009This page has been intentionally left blank DD ISO/TS12854:2009BSI GroupHeadquarters 389Chisw
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