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BRITISH STANDARD BS EN 4892003 District heating pipes Preinsulated bonded pipe systems for directly buried hot water networks Joint assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene The European Standard EN 4892003 has the status of a British Standard ICS 23.040.60 BS EN 4892003 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 41318 7 National foreword This British Standard is the official English language version of EN 4892003. It supersedes BS EN 4891995 which is withdrawn.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 24, 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 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 489 February 2003 ICS 23.040.60Supersedes EN 4891994 English version District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Joint assembly for 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 - Assemblage pr-isol pour tube de service en acier, isolation thermique en polyurthane et tube de protection en polythylne Fernwrmerohre - Werkmaig gedmmte Verbundmantelrohrsysteme fr direkt erdverlegte Fernwrmenetze - Rohrverbindungen fr Stahlmediumrohre mit 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 4892003 E EN 4892003 E 2 Contents page Foreword......................................................................................................................................................................4 Introduction.................................................................................................................................................................5 1Scope ..............................................................................................................................................................6 2Normative references ....................................................................................................................................6 3Terms and definitions....................................................................................................................................7 4Requirements.................................................................................................................................................7 4.1General requirements....................................................................................................................................7 4.1.1General requirements for the joint...............................................................................................................7 4.1.2Construction of the joint...............................................................................................................................7 4.1.3Competence of the welder and fitter............................................................................................................8 4.1.4Expected thermal life and long term temperature resistance...................................................................8 4.1.5Steel service pipe weld..................................................................................................................................8 4.1.6Polyurethane rigid foam insulation PUR...................................................................................................8 4.1.7Joint casing....................................................................................................................................................8 4.2Type test requirements .................................................................................................................................8 4.2.1Soil stress test................................................................................................................................................8 4.2.2Polyurethane rigid foam insulation PUR properties................................................................................9 4.3Installation instructions ................................................................................................................................9 4.3.1General............................................................................................................................................................9 4.3.2Work environment .........................................................................................................................................9 4.3.3Cleaning..........................................................................................................................................................9 4.3.4Surveillance system ......................................................................................................................................9 4.3.5Steel site weld ................................................................................................................................................9 4.3.6Joint casing....................................................................................................................................................9 4.3.7Foaming........................................................................................................................................................10 5s for type tests.................................................................................................................................10 5.1Soil stress test..............................................................................................................................................10 5.1.1General..........................................................................................................................................................10 5.1.2Sand box.......................................................................................................................................................10 5.1.3Sand ..............................................................................................................................................................11 5.1.4Test specimens............................................................................................................................................11 5.1.5Sand box test................................................................................................................................................11 5.1.6Water impermeability test...........................................................................................................................11 5.2Polyurethane rigid foam insulation PUR.................................................................................................12 5.2.1General..........................................................................................................................................................12 5.2.2Test specimens............................................................................................................................................12 5.2.3Sampling.......................................................................................................................................................12 5.2.4Ageing resistance........................................................................................................................................12 Annex A normative Fusion welding of steel service pipes on site...................................................................13 A.1Material..........................................................................................................................................................13 A.2Welding process ..........................................................................................................................................13 A.3Preparation for welding and lining up .......................................................................................................13 A.4Qualification of welders ..............................................................................................................................13 A.5Steel weld inspection ..................................................................................................................................13 A.5.1General..........................................................................................................................................................13 A.5.2Leak-tightness test with air/gas .................................................................................................................14 A.5.3Leak-tightness test with water....................................................................................................................14 A.5.4Radiographic examination..........................................................................................................................14 w w w . b z f x w . c o m EN 4892003 E 3 A.5.5Ultrasonic examination ...............................................................................................................................14 Annex B inative General guidelines for inspection of the joint on site....................................................15 Annex C inative Qualification of fitters installing joints in preinsulated bonded pipe networks..........17 C.1Purpose and scope......................................................................................................................................17 C.2Background for training and testing..........................................................................................................17 C.3Subjects for training and testing................................................................................................................17 C.3.1General..........................................................................................................................................................17 C.3.2Casing of polyethylene PE .......................................................................................................................18 C.3.3Surveillance..................................................................................................................................................19 C.3.4PUR-foam system........................................................................................................................................19 C.3.5Joint types/jointing systems ......................................................................................................................20 C.3.6Installation of joints.....................................................................................................................................21
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