1、BS EN 13941-2003 design and installation of preinsulated bonded pipe systems for direct heatingn t ? ?Licensed9copy:TheUniversityof Hong Kong, TheUniversityof Hong Kong, Version correct7c)BSI? ?heatingICS 91.140.10Design and installatioof preinsulated bondedpipe systems for districBRITISH STANDARD B
2、S EN 13941:2003Incorporating corrigendum March 2008BS EN 13941:2003Licensedcopy:TheUniversityof Hong Kong, TheUniversityof Hong Kong, Version correctc)This British Standard was published under the authority of the Standards Policy and Strategy Committee on 2 April 2003? BSI 2008ISBN 978 0 580 61327
3、2BSIAmendments/corrigenda issued since publicationDate Comments31 March 2008 Correction to title on front coverThis publication does not purport to include all the necessary provisions of C O M I T ? E U R O P ? E N D E N O R M C HES KOM ITEE F?R NOR M UNGManagement Centre: rue de Stassart, 36 B-105
4、0 Brussels? 2003 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13941:2003 ELicensedcopy:TheUniversityof Hong Kong, TheUniversityof Hong Kong, Version correctc)BSI2ContentspageForeword . 6Introduction. 71 Scope. 92 Normative referen
5、ces .93 Units and symbols .123.1 Units. 123.2 Symbol .124 Terms and definitions.135 General considerations for system design . 175.1 General requirements .175.2 Service life .185.3 Preliminary investigations .185.4 Determination of project class . 185.4.1 Risk assessment . 185.4.2 Project classes .1
6、95.5 Design documentation . 215.5.1 General.215.5.2 Operational data .215.5.3 Data related to the pipeline . 215.5.4 Specifications for quality control. 236 Components and materials . 236.1 Basic requirements .236.1.1 General.236.1.2 Non standardised components.246.2 Steel pipe components .246.2.1 G
7、eneral.246.2.2 Documentation .246.2.3 Characteristic values for steel . 246.2.4 Specific requirements for bends and tees. 256.2.5 Specific requirements for reducers and extensions .266.2.6 Specific requirements for other components. 266.3 Polyurethane foam insulation .266.4 PE casing.266.5 Expansion
8、 cushions.266.6 Valves and accessories . 276.6.1 General requirements.276.6.2 Marking and documentation .277 Actions and limit states. 277.1 General . 277.2 Simplified analysis procedure .297.3 Actions .297.3.1 General.297.3.2 Classification of actions297.4 Limit states.317.4.1 General.317.4.2 Limit
9、 states for service pipes of steel .31BS EN 13941:2003Licensedcopy:TheUniversityof Hong Kong, TheUniversityof Hong Kong, Version correctc)BSI.bzfxw4#ff66ff37.4.3 Composite stress conditions . 397.4.4 Limit states for PUR and PE . 398 Installation . 408.1 General . 408.2 Transportation and storage .
10、408.3 Excavation of pipe trench .408.4 Installation of pipes and components .418.4.1 General.418.4.2 Steel pipes. 418.4.3 PUR-PE Joints .418.4.4 Accessories .418.4.5 Expansion zones418.5 Welding of the steel pipe and testing of the steel welds . 418.5.1 General.418.5.2 Quality system for the differe
11、nt project classes .428.5.3 Qualification of the welding procedures .448.5.4 Welding consumables . 448.5.5 Place and position of the weld .448.5.6 Performance of welding work.448.5.7 Special procedures . 478.5.8 Inspection of the weld joint. 478.5.9 Documentation .498.6 Strength pressure test and le
12、ak tightness test .498.7 Assembly of casing pipes, joint installation and site insulation 508.8 Backfilling of trench . 508.9 Pipe bends and other components.518.9.1 Pipe bends . 518.9.2 Branches .518.9.3 Valves and accessories .528.10 Setting into operation538.10.1 General.538.10.2 Filling with wat
13、er for initial operation . 538.10.3 Surveillance system .538.11 Special constructions. 538.11.1 Special components .538.11.2 Above-ground pipelines with preinsulated pipes538.11.3 Insertion into casing pipe. 548.12 Construction work during the operation stage . 54Annex copy:TheUniversityof Hong Kong, TheUniversityof Hong Kong, Version correct
