BS EN 448-2003 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成套配件.pdf
《BS EN 448-2003 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成套配件.pdf》由会员分享,可在线阅读,更多相关《BS EN 448-2003 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成套配件.pdf(32页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 448:2003 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 448:2003 has the status of a British Sta
2、ndard 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 448:2003 This British Standard was published under the authority of the Standards Policy and Strategy
3、 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 448:2003. It supersedes BS EN 448:1995 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee RHE/9,
4、 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
5、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 in
6、clude 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 enq
7、uiries on the interpretation, or proposals for change, and keep the UK interests informed; 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
8、 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
9、 or networking permitted without license from IHS -,- EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 448 February 2003 ICS 23.040.40Supersedes EN 448:1994 English version District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Fitting assemblies of st
10、eel 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 d
11、e protection en polythylne Fernwrmerohre - Werkmig gedmmte Verbundmantelrohrsysteme fr direkt erdverlegte Fernwrmenetze - Verbund-Formstcke, bestehend aus Stahl-Mediumrohr, Polyurethan-Wrmedmmung und Auenmantel aus Polyethylen This European Standard was approved by CEN on 28 November 2002. CEN membe
12、rs 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 applicatio
13、n 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 s
14、tatus 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 Kin
15、gdom. 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 form and by any means reserved worldwide for CEN national Members. Ref. No. EN 448:2003 E Copyri
16、ght European Committee for Standardization Provided by IHS under license with CEN Not for ResaleNo reproduction or networking permitted without license from IHS -,- EN 448:2003 (E) 2 Contents page Foreword4 Introduction.5 1Scope 6 2Normative references 6 3Terms and definitions7 4Requirements.8 4.1St
17、eel parts.8 4.1.1Quality.8 4.1.2Wall thickness and diameter.8 4.1.3Bends8 4.1.4T-pieces.9 4.1.5Reducers.9 4.1.6Anchors.9 4.1.7Fusion welding of steel fittings10 4.1.8Surface condition.12 4.2Casing.12 4.3Polyurethane rigid foam insulation (PUR).12 4.4Fitting assemblies12 4.4.1Fitting ends.12 4.4.2Ang
18、le 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 bends16 4.4.7Tolerances of the main fitting dimensions16 5Test m
19、ethods17 5.1General17 5.2Test specimens17 5.3Steel parts.17 5.3.1Visual surface examination of welds.17 5.3.2Leak-tightness test with water17 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 ass
20、emblies18 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 thickness19 5.6.6Leak-tightness of casing pipe fittings .19 6Marking .20 6.1General20 6.2Ste
21、el service pipe.20 6.3Casing.20 6.4Fitting assembly.20 Annex A (informative) Guidelines for inspection and testing21 Copyright European Committee for Standardization Provided by IHS under license with CEN Not for ResaleNo reproduction or networking permitted without license from IHS -,- ? EN 448:200
22、3 (E) 3 A.1Manufacturers type test .21 A.2Manufacturers quality surveillance.21 A.3External inspection21 A.4Extent of inspection.21 A.5Manufacturers responsibility.21 Annex B (informative) Procedures for polyethylene welding24 B.1Introduction24 B.2Requirements for site, machine and equipment 24 B.3I
23、tems24 B.4Butt fusion welding .25 B.4.1Equipment 25 B.4.2Welding procedure 26 B.5Extrusion welding26 B.5.1Equipment 26 B.5.2Welding procedure 27 Bibliography28 Copyright European Committee for Standardization Provided by IHS under license with CEN Not for ResaleNo reproduction or networking permitte
24、d without license from IHS -,- ? EN 448:2003 (E) 4 Foreword This document (EN 448:2003) 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,
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- BS EN 448-2003 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成套配件 448 2003 区域 供暖 管道 直埋式 热水 供应 预先 绝热 连接
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