IEC_60794-3-50-2008.pdf

IEC 60794-3-50Edition 1.0 2008-10INTERNATIONAL STANDARD Optical fibre cables Part 3-50:Outdoor cables Family specification for gas pipe cables and subducts for installation by blowing and/or pulling/dragging in gas pipes IEC 60794-3-50:2008(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch Web:www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.?Catalogue of IEC publications:www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn and replaced publications.?IEC Just Published:www.iec.ch/online_news/justpub Stay up to date on all new IEC publications.Just Published details twice a month all new publications released.Available on-line and also by email.?Electropedia:www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French,with equivalent terms in additional languages.Also known as the International Electrotechnical Vocabulary online.?Customer Service Centre:www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance,please visit the Customer Service Centre FAQ or contact us:Email:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 60794-3-50Edition 1.0 2008-10INTERNATIONAL STANDARD Optical fibre cables Part 3-50:Outdoor cables Family specification for gas pipe cables and subducts for installation by blowing and/or pulling/dragging in gas pipes INTERNATIONAL ELECTROTECHNICAL COMMISSION VICS 33.180.10 PRICE CODEISBN 2-8318-1002-5 Registered trademark of the International Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 60794-3-50 IEC:2008(E)CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 Symbols and abbreviations.7 4 Family specification for gas pipe cables and subducts for installation by blowing and/or pulling/dragging in gas pipes(blank detail specification and minimum requirements).8 4.1 Construction.8 4.1.1 General.8 4.1.2 Subducts.8 4.1.3 Gas pipe cables.8 4.2 Optical fibres.9 4.2.1 Single-mode dispersion unshifted(B1.1)optical fibre.9 4.2.2 Single-mode dispersion shifted(B2)optical fibre.9 4.2.3 Single-mode non-zero dispersion(B4)optical fibre.10 4.2.4 Single-mode(B6)optical fibre.10 4.2.5 Multimode fibres.10 4.3 High pressure gas pipe cable constructions.11 4.3.1 Cable for installation within subducts(previously installed within the high pressure gas pipe).11 4.3.2 Cable for direct installation within the high pressure gas pipe.12 4.3.3 Subduct construction.13 4.4 Installation and operating conditions.13 4.4.1 Tests applicable to cables/cable elements.13 4.4.2 Installation conditions.13 4.5 Mechanical and environmental tests.14 4.5.1 Subducts.14 4.5.2 Cable for installation within subducts(previously installed into the gas pipe).16 4.5.3 Cables for direct installation into the high pressure gas pipe.20 Annex A(informative)Blank detail specification.24 Annex B(informative)OF cables for high pressure gas pipes.27 Annex C(informative)Examples of subducts and high pressure gas pipe cables.28 Annex D(informative)Example for installation schemes of cables in high pressure gas pipes(fibre-in-gas).30 Figure C.1 Example of constructions of cables for installation in subducts within gas pipes.28 Figure C.2 Example of constructions of cables for direct installation into high pressure gas pipes.29 Figure D.1 Picture of an I/O-port.30 Figure D.2 Schematic drawing of Figure D.1:installation of OF cable within the gas pipe.30 Figure D.3 Schematic drawing of the installation of I/O-ports on high pressure PE g