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BRITISH STANDARD BS EN 4482003 District heating pipes Preinsulated bonded pipe systems for directly buried hot water networks Fitting assemblies of steel service pipes, polyurethane thermal insulation and outer casing of polyethylene The European Standard EN 4482003 has the status of a British Standard ICS 23.040.40 Copyright European Committee for Standardization Provided by IHS under license with CEN Not for ResaleNo reproduction or networking permitted without license from IHS ----,,,,,,,--- BS EN 4482003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 27 February 2003 BSI 27 February 2003 ISBN 0 580 41316 0 National foreword This British Standard is the official English language version of EN 4482003. It supersedes BS EN 4481995 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee RHE/9, Thermal insulating materials, to Subcommittee RHE/9/3, Insulation of underground pipelines, which has the responsibility to A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests ined; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 28, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Copyright European Committee for Standardization Provided by IHS under license with CEN Not for ResaleNo reproduction or networking permitted without license from IHS ----,,,,,,,--- EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 448 February 2003 ICS 23.040.40Supersedes EN 4481994 English version District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Fitting assemblies of steel service pipes, polyurethane thermal insulation and outer casing of polyethylene Tuyaux de chauffage urbain - Systmes bloqus de tuyaux pr-isols pour les rseaux deau chaude enterrs directement - Raccords pr-isols en acier pour tubes de service en acier, isolation thermique en polyurthane et tube de protection en polythylne Fernwrmerohre - Werkmig gedmmte Verbundmantelrohrsysteme fr direkt erdverlegte Fernwrmenetze - Verbund-stcke, bestehend aus Stahl-Mediumrohr, Polyurethan-Wrmedmmung und Auenmantel aus Polyethylen This European Standard was approved by CEN on 28 November 2002. 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. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovak Republic, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any and by any means reserved worldwide for CEN national Members. Ref. No. EN 4482003 E Copyright European Committee for Standardization Provided by IHS under license with CEN Not for ResaleNo reproduction or networking permitted without license from IHS ----,,,,,,,--- EN 4482003 E 2 Contents page Foreword......................................................................................................................................................................4 Introduction.................................................................................................................................................................5 1Scope ..............................................................................................................................................................6 2Normative references ....................................................................................................................................6 3Terms and definitions....................................................................................................................................7 4Requirements.................................................................................................................................................8 4.1Steel parts.......................................................................................................................................................8 4.1.1Quality.............................................................................................................................................................8 4.1.2Wall thickness and diameter.........................................................................................................................8 4.1.3Bends..............................................................................................................................................................8 4.1.4T-pieces...........................................................................................................................................................9 4.1.5Reducers.........................................................................................................................................................9 4.1.6Anchors...........................................................................................................................................................9 4.1.7Fusion welding of steel fittings..................................................................................................................10 4.1.8Surface condition.........................................................................................................................................12 4.2Casing...........................................................................................................................................................12 4.3Polyurethane rigid foam insulation PUR.................................................................................................12 4.4Fitting assemblies........................................................................................................................................12 4.4.1Fitting ends...................................................................................................................................................12 4.4.2Angle between casing segments of bend and minimum length.............................................................13 4.4.3Requirements of polyethylene welding.....................................................................................................13 4.4.4Leak-tightness of the welded casing pipe.................................................................................................15 4.4.5Increase in diameter of the casing pipe ....................................................................................................16 4.4.6Minimum insulation thickness in bends....................................................................................................16 4.4.7Tolerances of the main fitting dimensions................................................................................................16 5Test s................................................................................................................................................17 5.1General..........................................................................................................................................................17 5.2Test specimens............................................................................................................................................17 5.3Steel parts.....................................................................................................................................................17 5.3.1Visual surface examination of welds.........................................................................................................17 5.3.2Leak-tightness test with water....................................................................................................................17 5.3.3Leak-tightness test with air.........................................................................................................................17 5.3.4Radiographic examination of butt welds...................................................................................................18 5.4Casing...........................................................................................................................................................18 5.5Polyurethane rigid foam insulation PUR.................................................................................................18 5.6Fitting assemblies........................................................................................................................................18 5.6.1Centre line deviation and angular deviation.............................................................................................18 5.6.2Visual examination of welds on casing pipes...........................................................................................18 5.6.3Bending test .................................................................................................................................................18 5.6.4Increase in diameter of the casing pipe ....................................................................................................19 5.6.5Minimum insulation thickness....................................................................................................................19 5.6.6Leak-tightness of casing pipe fittings .......................................................................................................19 6Marking .........................................................................................................................................................20 6.1General..........................................................................................................................................................20 6.2Steel service pipe.........................................................................................................................................20 6.3Casing...........................................................................................................................................................20 6.4Fitting assembly...........................................................................................................................................20 Annex A inative Guidelines for inspection and testing..............................................................................21 Copyright European Committee for Standardization Provided by IHS under license with CEN Not for ResaleNo reproduction or networking permitted without license from IHS ----,,,,,,,--- w w w . b z f x w . c o m EN 4482003 E 3 A.1Manufacturer’s type test .............................................................................................................................21 A.2Manufacturer’s quality surveillance...........................................................................................................21 A.3External inspection......................................................................................................................................21 A.4Extent of inspection.....................................................................................................................................21 A.5Manufacturer’s responsibility.....................................................................................................................21 Annex B inative Procedures for polyethylene welding..............................................................................24 B.1Introduction..................................................................................................................................................24 B.2Requirements for site, machine and equipment ......................................................................................24 B.3Items..............................................................................................................................................................24 B.4Butt fusion welding .....................................................................................................................................25 B.4.1Equipment ....................................................................................................................................................25 B.4.2Welding procedure ......................................................................................................................................26 B.5Extrusion welding........................................................................................................................................26 B.5.1Equipment ....................................................................................................................................................26 B.5.2Welding procedure ..................................................................................................
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