~ STD BSI BS EN 502b7 1 ENGL L779 lb 2 q b b 9 0775LqL 528 m BRITISH STANDARD Common test methods for cables under fire conditions Tests on gases evolved during combustion of materials from cables Par[.]
~ STD-BSI B S EN 502b7-1-ENGL L779 l b q b b 0775LqL 528 m BS EN BRITISH STANDARD 50267-1:1999 ````-`-`,,`,,`,`,,` - Common test methods for cables under fire conditions - Tests on gases evolved during combustion of materials from cables Part 1: Apparatus The European Standard EN 50267-1:1998has the status of a British Standard ICs 13.220.4029.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHI LAW Not for Resale BS EN 50267-k1999 National foreword This British Standard is the English ianguage version of EN 50267-1:1998 When combined with BS EN 50267-2-1, it supersedes BS 64251:lW which is withdrawn When combined with BS EN 50267-2-3, it supersedes BS 64252:1993 which is withdrawn - aid enquirem to understand the tea - present to the responsible European committee any enquiries on the inteqxetation, or proposals for change, and keep the UK interests informed - monitor reiated intemational and European developments and promulgate them in the UK A list of organizatjons represented on thissubcommittee can be obtained on request to its secrem Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “ I n t e d o n a l Standards Correspondence Index”,or by using the “Find”facility of the BSI Standards Electronic Catalogue A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages to and a back cover The BSI copyright notice displayed in this document indicates when the document was last issued > been prepared under the direction of the Elecỵxotechnicai Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 1999 h d NO Da Comments O BSI 09-1999 ISBN O 680 32732 Not for Resale ````-`-`,,`,,`,`,,` - The UK participation in its preparation was entrusted by Technical Committee GEYZO, Electric cables, to Subcommittee GELJ20/3, insuiaiion and sheath, which has the responsibility to: STD-BSI BS EN 502b7-1-ENGL 1999 l b b b ỵ 0795143 3TO EUROPEAN STANDARD = EN 50267-1 NORME EUROPÉENNE EUROPÄISCHENORM June 1998 ICs 13.220.40; 29.060.20 Partly supersedes HD 602 S 1: 1992 Descriptors: Electrical installation, electric cables, fire tests, combustion tests, combustion products, burning gases, corrosive gases, determination, acidity, corrosivity, test equipment English version Common test methods for cables under fire conditions Tests on gases evolved during combustion of materials from cables Part 1: Apparatus Méthodes d'essai communes aux câbles soumis au feu -Essais sur les gaz emis lors de la combustion d'un materiau preleve sur un câble Partie 1: Appareillage d'essai Allgemeine Priifverfahren f i r das Verhalten von Kabeln und isolierten Leitungen im Brandfall -Prüfung der bei der Verbrennung der Werkstoffe von Kabeln und isolierten Leitungen entstehenden Gase Teil 1: Prüfgerät This European Standard was approved by CENELEC on 1998-04-01 CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European S u d a r d the status of a national standard without any alteration "-tv date lists and bibliographical references concerning such national standards may be obtained on dion to the Central Secretariat or to any CENELEC member luropean Standard exists in three official versions (English, French, German) A version in any other larsguage made by translation under the responsibilityof a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee fir Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels Q 1998 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members ````-`-`,,`,,`,`,,` - Ref No EN 50267-1:1998 E Not for Resale Page EN 50267-1:1998 Foreword T u s European Standard was prepared by the Technical Committee CENELEC TC20, Electric cables When used in conjunction with EN 50267-2-3 this European Standard supersedes HD 602 S 1:1992 The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50267-1 on 1998-04-01 - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dûp) 1999-03-01 (dow) 2000-03-0 - latest date by which national standards conflicting with the EN have to be withdrawn Contents Page Foreword Scope Normative references Definition Test apparatus 4.1 General 4.2 Tube h a c e 4.3 Tube 4.4 Combustion boats 4.5 Bubbling devices for gases 4.6 Air supply system 3 3 3 3 4 O BSI 09- I999 Not for Resale ````-`-`,,`,,`,`,,` - The following dates were fuced: ~ STD-BSI BS EN 502b7-L-ENGL 9 9 l b b b 7 5 173 Page EN 50267-1~1998 Scope EN 50267-1 specifies apparatus suitable for use with procedures for the quantitative determination of gases, especially acidic and corrosive gases, evolved when non-metallic materials taken from cables are subject to combustion Normative references This European Standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies EN 60695-4, Fire hazard testing -Part 4: Terminologyconcerningjre tests NOTE IEC 60695 is in the CWISCof re-nurnbning its parts and sections This will also affect the equivalent ENS Definition For the purposes of EN 50267-1 the following definition applies The defmition is taken from EN 60695-4 3.1 Test apparatus 4.1 General The principle diagrams of the apparatus are shown in Figures i to The assembly of the components which constitute the test apparatus shall be leak-tight, The connecting distances between the tube and the first wash bottle and between the first and the second wash bottle shall be as short as possible Glass or silicone rubber tubing shall be used for these connections N O T E At the exit side of the tube as close to the end as possible, it is permitted to place a plug of silica wool (typically weighing about g) to aid collection of condensates 4.2 Tube furnace The effective length of the heating zone of the furnace shall be 500 mm to 600 mm and its inside diameter 40 mm to 60 mm It shall be equipped with an electrically adjusted heating system 4.3 Tube The furnace contains a fireproof tube made of silica resistant to the action of corrosive gases The tube shall be approximately concentric to the tube furnace The inside diameter of the silica tube shall be within the limits of 32 mm to 45 mm The tube protrudes on the entrance side of the h a c e by a length of 60 mm to 200 mm, and on the exit side by 60 mm to 100 mm The initial clearance should allow for thermal expansion 4.4 Combustion boats These are recommended to be either porcelain, fused quartz or soapstone and should have the following dimensions: -45mmto 100mmlong; 30 mm wide; -5 mm to 10 mm deep - 12 mm to O BSI 09-1999 Not for Resale ````-`-`,,`,,`,`,,` - combustion exothermic reaction of a substance with an oxidizer with emission of effluent, generally accompanied by flames and/or glowing and/or emission of smoke Page EN 50267-1:1998 A preferred method for insertion of the combustion boats into the tube is shown in Figure Each boat should only be used three times before firing or renewing 4.5 Bubbling devices for gases At the exit of the tube, the gases pass through two wash bottles as described in the relevant section of Part (An example of a wash bottle is shown in Figure 2.) A magnetic stirrer shall be introduced in the fmt bottle to get a good swirling motion and a better absorption of the combustion gases The tubes into the wash bottles shall have a maximum internal diameter at their tip of mm, also to aid better absorption The height of the liquid above the end of the tube shall be 100 mm to 120 mm in each bottle 4.6 Air supply system The gas used for combustion shall be air The flow rate of air introduced into the tube shall be adjusted according to the a c l a l internal cross-sectional area of the tube, such that the speed of air flowing across the sample is 20 ml.mm-*.h - Because the speed of air cannot be directly Teasured it shall be regulated by reference to the flow rate of air The flow rate of air shall be (0,O15 1.h- f 10 % NOTE The derivation of the required flow rate of air to give the specified speed of air is: where D is the internai diameter of $e tube (mrn); p is the flow rate in air (mi+ is the speed of air (mi.mm*”i-’) Y Because a tolerance off 1O % is specified for the flow rate of air this also applies to V The air supply, which shall be derived from a high purity source, shall be adjusted and controlled by a needle valve, and the flow rate monitored by a flowmeter of the appropriate range Method ‘’ Use of synthetic air (compressed air in bottle as delivered) Air is introduced on the inlet side of the combustion tube (See Figure 3.) Method 2’ ’ ````-`-`,,`,,`,`,,` - Use of compressed air supplied in the laboratory Air is introduced on the inlet side of the combustion tube and should be filtered (See Figure 4.) Method 3” Use the ambient air of the laboratory, after having filtered it suitably In that case, the mixture of air and combustion gas is sucked by a pump (See Figure ) ’ ) The operator should take precautions i.e the wearing of eye protection and suitable protective clothing because certain materiais ignite quickly, and can cause Wow-back” of hot gases Care should also be taken to avoid over-pressurization of the system, and to allow for venting of exhaust gases 6BSI 09-I999 Not for Resale Page EN 50267-1:1998 I J ````-`-`,,`,,`,`,,` - O BSI 09-1999 Not for Resale Page EN 50267-1:1998 I I I I i i I I i l e l - -e e T O U L O E E : O '- z - - - : -E - Stwirr Figure -Example of a gas washing bottle BSI 09- I999 ````-`-`,,`,,`,`,,` - Not for Resale STD-BSI B S E N 502b7-3-ENGL 3999 ````-`-`,,`,,`,`,,` - BSI 09- 1999 Not for Resale = Lb24bbS 0795349 Al9 Page EN 50267-1:1998 ~ ~~ ~ STD.BSI BS EN 502b7-L-ENGL 1999 ~ L b r i b b ï 0795L50 530 Page EN 50267-1:1998 L CA u U P v) &E! u ir O !i I (Y a O PE c, e CA a a CA c, -a? d O if I om iz O BSI 09-1999 ````-`-`,,`,,`,`,,` - Not for Resale ~~ S T D - B S I BS EN 50267-L-ENGL ~~ 1777 D b b b 0775151 477 Page EN 50267-1:1998 f -2 Y #1c ````-`-`,,`,,`,`,,` - o f O BSI 09- 1999 Not for Resale ~ ~ ~~ STD*BSI BS EN 502b7-3-ENGL L777 W 3bt'ibbS 7 5 303 W BS EN 50267-k1999 BSI - British Standards Institution BSI is the independent national body responsible for preparing British stcuidasds It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Chaster Revisions British Standardsare updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quaiity of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Tel 020 8996 9000 Fax:020 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services Tel 020 8996 9001 Fax: 020 8996 7001 ````-`-`,,`,,`,`,,` - In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards,unless otherwise requested Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact the Information Centre Tel 020 8996 7111 Fax 020 8996 7048 Subscribingmembers of BSI are kept up to date with standards developments and receive substanüai discounts on the purchase price of standards For details of these and other benefits contact Membership Administration Tel: 020 8996 7002 Fax: 020 8996 7001 Copyright Copyright subsists in all BSI publications BSI also holds the copyright, in the UK, of the publications of the inkrnational standardization bodies Except as permitteà under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or tsansmitted in any form or by any means - electronic, photocopying, recording or othenvise - without prior written permission from BSI This does not preclude the free use, in the course of implemenljng the standard, of necessary details such as symbols, and size, type or graàe designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained If permission is granted, the terms may include royalty payments or a licensing agreement Details and advice can be obtained from the Copyright hhager Tel 020 8996 7070 BSI 389 Chiswick High Road London w4 4AL Not for Resale