07-30169852-DC.pdf

a Date: 14 November 2007 Origin: European Latest date for receipt of comments: 29 February 2008 Project no.: 2007/02115 Responsible committee: FSH/18/6 Gaseous extinguishing media and systems Interested committees: FSH/18 Title: Draft BS EN 15004-9 Fixed firefighting systems - Gas extinguishing systems Part 9 Physical properties and system design of gas extinguishing systems for IG-55 extinguishant (ISO 14520-14, modified) Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 29 February 2008. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. 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Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-global.com. Direct tel: 020 8996 7224 Responsible Committee Secretary: Mr M J Hodson (BSI) E-mail: mike.hodsonbsi-global.com Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 07/30169852 DC Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 02:39:57 GMT+00:00 2007, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on European discussions in which the UK has taken an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent British Standard. If no comments are received to the contrary, then the UK will approve this draft and implement it as a British Standard. 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Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 02:39:57 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM FINAL DRAFT prEN 15004-9 October 2007 ICS 13.220.20 English Version Fixed firefighting systems - Gas extinguishing systems - Part 9: Physical properties and system design of gas extinguishing systems for IG-55 extinguishant (ISO 14520-14, modified) Installations fixes de lutte contre l'incendie - Installations d'extinction à gaz - Partie 9 : Propriétés physiques et conception des systèmes pour agent extincteur IG-55 (ISO 14520-14, modifiée) Ortsfeste Brandbekämpfungsanlagen - Löschanlagen mit gasförmigen Löschmitteln - Teil 9: Physikalische Eigenschaften und Anlagenauslegung für Feuerlöschmittel IG-55 (ISO 14520-14, modifiziert) This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee CEN/TC 191. If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. prEN 15004-9:2007: E Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 02:39:57 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 15004-9:2007 (E) 2 Contents Page Foreword3 Foreword of ISO 14520-14:2005 4 1 Scope 5 2 Normative references5 3 Terms and definitions .5 4 Characteristics and uses 5 4.1 General5 4.2 Use of IG-55 systems 6 5 Safety of personnel8 6 System design9 6.1 Fill pressure9 6.2 Superpressurization10 6.3 Extinguishant quantity10 Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 02:39:57 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 15004-9:2007 (E) 3 Foreword This document (prEN 15004-9:2007) has been prepared by Technical Committee CEN/TC 191 “Fixed firefighting systems”, the secretariat of which is held by BSI. This document is currently submitted to the Unique Acceptance Procedure. The text of the International Standard ISO 14520-14:2005 from Technical Committee ISO/TC 21 “Equipment for fire protection and fire fighting“ of the International Organization for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC 191 “Fixed firefighting systems“, the secretariat of which is held by BSI, with common modifications which are indicated by a straight line in the margin of the text. This European Standard will consist of the following parts, under the general title Fixed firefighting systems Gas extinguishing systems: Part 1: Design, installation and maintenance (ISO 14520-1, modified) Part 2: Physical properties and system design of gas extinguishing systems for FK-5-1-12 extinguishant (ISO 14520-5, modified) Part 3: Physical properties and system design of gas extinguishing systems for HCFC Blend A extinguishant (ISO 14520-6, modified) Part 4: Physical properties and system design of gas extinguishing systems for HFC 125 extinguishant (ISO 14520-8, modified) Part 5: Physical properties and system design of gas extinguishing systems for HFC 227ea extinguishant (ISO 14520-9, modified) Part 6: Physical properties and system design of gas extinguishing systems for HFC 23 extinguishant (ISO 14520-10, modified) Part 7: Physical properties and system design of gas extinguishing systems for IG-01 extinguishant (ISO 14520-12, modified) Part 8: Physical properties and system design of gas extinguishing systems for IG-100 extinguishant (ISO 14520-13, modified) Part 9: Physical properties and system design of gas extinguishing systems for IG-55 extinguishant (ISO 14520-14, modified) Part 10: Physical properties and system design of gas extinguishing systems for IG-541 extinguishant (ISO 14520-15, modified) The International Standards ISO 14520-2 and ISO 14520-11, which dealt with CF3I and HFC 236fa extinguishants, respectively, have not been implemented by CEN, as CF3I extinguishant is only valid for local application and HFC 236fa extinguishant is only applicable for portable fire extinguishers and local application, respectively, which is not covered by the scope. Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 02:39:57 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 15004-9:2007 (E) 4 Foreword of ISO 14520-14:2005 ISO (the International Organization for Standardization) 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 right 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 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 an 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 14520-14 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 14520-14:2000), which has been technically revised. ISO 14520 consists of the following parts, under the general title Gaseous media 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 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 Parts 3, 4 and 7, which dealt with FC-2-1-8, FC-3-1-10 and HCFC 124 extinguishants, respectively, have been withdrawn, as these types are no longer manufactured. Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 02:39:57 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 15004-9:2007 (E) 5 1 Scope This document gives specific requirements for gaseous fire-extinguishing systems, with respect to the IG-55 extinguishant. It includes details of physical properties, specification, usage and safety aspects and is applicable to systems operating at nominal pressure of 150 bar, 200 bar and 300 bar at 15 °C. This does not preclude the use of other systems; however, design data for other pressures were not available at time of publication. 2 Normative references The following 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. prEN 15004-1:2007, Fixed firefighting systems Gas extinguishing systems - Design installation and maintenance (ISO 14520-1, modified) 3 Terms and definitions For the purposes of this document, the terms and definitions given in prEN 15004-1:2007 apply. 4 Characteristics and uses 4.1 General Extinguishant IG-55 shall comply with the specification according to Table 1. IG-55 is a colourless, odourless, electrically non-conductive gas with a density approximately the same as that of air. It is an inert gas mixture consisting nominally of 50 % argon and 50 % nitrogen with the following mixture specification. a) Argon: range of (50 ± 5) %. b) Nitrogen: range of (50 ± 5) %. The physical properties are given in Table 2. IG-55 extinguishes fires by a reduction of the oxygen concentration in the atmosphere of the hazard enclosure. Table 1 Specification for IG-55 Requirement Property Argon Nitrogen Purity 99,9 % 99,9 % Water content 15 × 106 10 × 106 Only principal contaminants are shown. Other measurements may include hydrocarbons, CO, NO, NO2, CO2, etc. Most are 20 × 106. Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 02:39:57 GMT+00:00 2007, Uncontrolled Copy, (c) BSI prEN 15004-9:2007 (E) 6 Table 2 Physical properties of IG-55 Property Unit Value Molecular mass 33,98 Boiling point at 1,013 bar (absolute) a °C Freezing point °C Critical temperat