BS EN 488-2003 区域供暖管道.直埋式热水供应网用预先绝热连接的管道系统.聚氨酯热绝缘和聚乙烯外覆层钢管用钢阀门组件.pdf

BRITISH STANDARD BS EN 4882003 District heating pipes Preinsulated bonded pipe systems for directly buried hot water networks Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene The European Standard EN 4882003 has the status of a British Standard ICS 23.060.01 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 4882003 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 41317 9 National foreword This British Standard is the official English language version of EN 4882003. It supersedes BS EN 4881995 which is withdrawn.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 16, 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 488 February 2003 ICS 23.060.01Supersedes EN 4881994 English version District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene Tuyaux de chauffage urbain - Systmes bloqus de tuyaux prisols pour les rseaux deau chaude enterrs directement - Robinets prisols pour tubes de service en acier, isolation thermique en polyurthane et tube de protection en polythylne Fernwrmerohre - Werkmig gedmmte Verbundmantelsysteme fr direkt erdverlegte Fernwrmenetze - Vorgedmmte Absperrarmaturen fr Stahlmediumrohre mit Polyurethan-Wrmdmmung 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 4882003 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 4882003 E 2 Contents page Foreword......................................................................................................................................................................4 Introduction.................................................................................................................................................................5 1Scope ..............................................................................................................................................................6 2Normative references ....................................................................................................................................6 3Terms and definitions....................................................................................................................................6 4Requirements.................................................................................................................................................6 4.1Steel parts.......................................................................................................................................................6 4.1.1General requirements for valves..................................................................................................................6 4.1.2Pressure ratings for valves...........................................................................................................................7 4.1.3Service temperatures for valves...................................................................................................................7 4.1.4Steel service pipes.........................................................................................................................................7 4.1.5Welding ends on valves................................................................................................................................7 4.1.6Resistance to bending and axial forces ......................................................................................................7 4.1.7Leak-tightness of valves...............................................................................................................................9 4.2Fusion welding of steel.................................................................................................................................9 4.3Casing.............................................................................................................................................................9 4.4Polyurethane rigid foam insulation PUR...................................................................................................9 4.5Valve assembly ..............................................................................................................................................9 4.5.1Ends of valve assembly ................................................................................................................................9 4.5.2End of stem construction..............................................................................................................................9 4.5.3Requirements for polyethylene welding......................................................................................................9 4.5.4Leak-tightness of the welded casing...........................................................................................................9 4.5.5Increase in diameter of the casing pipe ......................................................................................................9 4.5.6Minimum insulation thickness......................................................................................................................9 4.5.7Tolerances on the main dimensions..........................................................................................................10 5Test s................................................................................................................................................10 5.1General..........................................................................................................................................................10 5.2Test specimens............................................................................................................................................10 5.3Steel parts.....................................................................................................................................................10 5.3.1Constructional testing of valves ................................................................................................................10 5.3.2Leak-tightness test of valves......................................................................................................................11 5.3.3Testing of steel welds..................................................................................................................................11 5.4Casing...........................................................................................................................................................11 5.5Polyurethane rigid foam insulation............................................................................................................11 5.6Valve assembly ............................................................................................................................................11 6Marking .........................................................................................................................................................12 6.1General..........................................................................................................................................................12 6.2Steel valve.....................................................................................................................................................12 6.3Casing...........................................................................................................................................................12 6.4Valve assembly ............................................................................................................................................12 7Installation and maintenance......................................................................................................................12 Annex A inative Guidelines for inspection and testing..............................................................................13 A.1Manufacturer’s type test .............................................................................................................................13 A.2Manufacturer’s quality surveillance...........................................................................................................13 A.3External inspection......................................................................................................................................13 A.4Extent of inspection.....................................................................................................................................13 A.5Manufacturer’s responsibility.....................................................................................................................13 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 4882003 E 3 Annex B inative Guideline for installation of valves ..................................................................................15 Bibliography..............................................................................................................................................................16 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 4882003 E 4 Foreword This document EN 4882003 has been prepared by Technical Committee CEN/TC 107 “Prefabricated district heating pipe systems“, the secretariat of which is held by DS. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2003, and conflicting national standards shall be withdrawn at the latest by August 2003. This document supersedes EN 4881994. Anns A and B are inative. This document includes a Bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound implement this European Standard Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. 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 4882003 E 5 Introduction The first edition of EN 488 was approved in 1994. The main areas of the revision are  the title has been amended by ”District heating pipes”;  the term ”underground” has been changed to ”directly buried”;  the mentioning in the foreword of the production ”injected poured” has been deleted;  two notes concerning commonly used types of valves and rules for calculation of loads and stresses in valve assemblies have been added to the scope;  service pipes with nominal diameters from DN 700 up to and including DN 1200 have been added and the requirements have been amended accordingly;  through the reference to EN 448 casings with nominal outside diameters from 900 mm up to and including 1400 mm have been added and the r