BS-EN-448-2003.pdf
《BS-EN-448-2003.pdf》由会员分享,可在线阅读,更多相关《BS-EN-448-2003.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 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:47:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 448:2003 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 4
3、1316 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 It supersedes BS EN 448:1995 which is withdrawn.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, Thermal insulating materials, to Subcommittee RHE/9/3, Insulati
4、on 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
5、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 respons
6、ible 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
7、 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 back cover and a back cover. The BSI copyright date displayed in t
8、his document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:47:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 448 February 2003 ICS 23
9、.040.40Supersedes EN 448:1994 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
10、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-F
11、ormstcke, 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 t
12、he 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)
13、. 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
14、, 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 d
15、e 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 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:47:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 448:2003 (E) 2 Contents pag
16、e Foreword4 Introduction.5 1Scope 6 2Normative references 6 3Terms and definitions7 4Requirements.8 4.1Steel 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 4.2Casin
17、g.12 4.3Polyurethane rigid foam insulation (PUR).12 4.4Fitting assemblies12 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
18、 16 4.4.6Minimum insulation thickness in bends16 4.4.7Tolerances of the main fitting dimensions16 5Test methods17 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 5.3.4Radiographi
19、c examination of butt welds.18 5.4Casing.18 5.5Polyurethane rigid foam insulation (PUR).18 5.6Fitting assemblies18 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 5.6.5Minimu
20、m insulation thickness19 5.6.6Leak-tightness of casing pipe fittings .19 6Marking .20 6.1General20 6.2Steel service pipe.20 6.3Casing.20 6.4Fitting assembly.20 Annex A (informative) Guidelines for inspection and testing21 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:47:49 GMT+00:00 2006
21、, Uncontrolled Copy, (c) BSI EN 448:2003 (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
22、for site, machine and equipment 24 B.3Items24 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 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:47:49 GMT+00:00 2006, Uncontrolled Copy, (c
23、) BSI 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, either by publication of an
24、 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 448:1994. Annexes A and B are informative. This document includes a Bibliography. According to the CEN/CENELEC Internal Reg
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS EN 448 2003
链接地址:https://www.31doc.com/p-3742306.html