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

BSEN4882003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BRITISHSTANDARDBSEN4482003DISTRICTHEATINGPIPESPREINSULATEDBONDEDPIPESYSTEMSFORDIRECTLYBURIEDHOTWATERNETWORKSFITTINGASSEMBLIESOFSTEELSERVICEPIPES,POLYURETHANETHERMALINSULATIONANDOUTERCASINGOFPOLYETHYLENETHEEUROPEANSTANDARDEN4482003HASTHESTATUSOFABRITISHSTANDARDICS2304040COPYRIGHTEUROPEANCOMMITTEEFORSTANDARDIZATIONPROVIDEDBYIHSUNDERLICENSEWITHCENNOTFORRESALENOREPRODUCTIONORNETWORKINGPERMITTEDWITHOUTLICENSEFROMIHS,BSEN4482003THISBRITISHSTANDARDWASPUBLISHEDUNDERTHEAUTHORITYOFTHESTANDARDSPOLICYANDSTRATEGYCOMMITTEEON27FEBRUARY2003BSI27FEBRUARY2003ISBN0580413160NATIONALFOREWORDTHISBRITISHSTANDARDISTHEOFFICIALENGLISHLANGUAGEVERSIONOFEN4482003ITSUPERSEDESBSEN4481995WHICHISWITHDRAWNTHEUKPARTICIPATIONINITSPREPARATIONWASENTRUSTEDBYTECHNICALCOMMITTEERHE/9,THERMALINSULATINGMATERIALS,TOSUBCOMMITTEERHE/9/3,INSULATIONOFUNDERGROUNDPIPELINES,WHICHHASTHERESPONSIBILITYTOALISTOFORGANIZATIONSREPRESENTEDONTHISSUBCOMMITTEECANBEOBTAINEDONREQUESTTOITSSECRETARYCROSSREFERENCESTHEBRITISHSTANDARDSWHICHIMPLEMENTINTERNATIONALOREUROPEANPUBLICATIONSREFERREDTOINTHISDOCUMENTMAYBEFOUNDINTHEBSICATALOGUEUNDERTHESECTIONENTITLED“INTERNATIONALSTANDARDSCORRESPONDENCEINDEX”,ORBYUSINGTHE“SEARCH”FACILITYOFTHEBSIELECTRONICCATALOGUEOROFBRITISHSTANDARDSONLINETHISPUBLICATIONDOESNOTPURPORTTOINCLUDEALLTHENECESSARYPROVISIONSOFACONTRACTUSERSARERESPONSIBLEFORITSCORRECTAPPLICATIONCOMPLIANCEWITHABRITISHSTANDARDDOESNOTOFITSELFCONFERIMMUNITYFROMLEGALOBLIGATIONSAIDENQUIRERSTOUNDERSTANDTHETEXTPRESENTTOTHERESPONSIBLEINTERNATIONAL/EUROPEANCOMMITTEEANYENQUIRIESONTHEINTERPRETATION,ORPROPOSALSFORCHANGE,ANDKEEPTHEUKINTERESTSINFORMEDMONITORRELATEDINTERNATIONALANDEUROPEANDEVELOPMENTSANDPROMULGATETHEMINTHEUKSUMMARYOFPAGESTHISDOCUMENTCOMPRISESAFRONTCOVER,ANINSIDEFRONTCOVER,THEENTITLEPAGE,PAGES2TO28,ANINSIDEBACKCOVERANDABACKCOVERTHEBSICOPYRIGHTDATEDISPLAYEDINTHISDOCUMENTINDICATESWHENTHEDOCUMENTWASLASTISSUEDAMENDMENTSISSUEDSINCEPUBLICATIONAMDNODATECOMMENTSCOPYRIGHTEUROPEANCOMMITTEEFORSTANDARDIZATIONPROVIDEDBYIHSUNDERLICENSEWITHCENNOTFORRESALENOREPRODUCTIONORNETWORKINGPERMITTEDWITHOUTLICENSEFROMIHS,EUROPEANSTANDARDNORMEEUROPENNEEUROPISCHENORMEN448FEBRUARY2003ICS2304040SUPERSEDESEN4481994ENGLISHVERSIONDISTRICTHEATINGPIPESPREINSULATEDBONDEDPIPESYSTEMSFORDIRECTLYBURIEDHOTWATERNETWORKSFITTINGASSEMBLIESOFSTEELSERVICEPIPES,POLYURETHANETHERMALINSULATIONANDOUTERCASINGOFPOLYETHYLENETUYAUXDECHAUFFAGEURBAINSYSTMESBLOQUSDETUYAUXPRISOLSPOURLESRSEAUXDEAUCHAUDEENTERRSDIRECTEMENTRACCORDSPRISOLSENACIERPOURTUBESDESERVICEENACIER,ISOLATIONTHERMIQUEENPOLYURTHANEETTUBEDEPROTECTIONENPOLYTHYLNEFERNWRMEROHREWERKMIGGEDMMTEVERBUNDMANTELROHRSYSTEMEFRDIREKTERDVERLEGTEFERNWRMENETZEVERBUNDFORMSTCKE,BESTEHENDAUSSTAHLMEDIUMROHR,POLYURETHANWRMEDMMUNGUNDAUENMANTELAUSPOLYETHYLENTHISEUROPEANSTANDARDWASAPPROVEDBYCENON28NOVEMBER2002CENMEMBERSAREBOUNDTOCOMPLYWITHTHECEN/CENELECINTERNALREGULATIONSWHICHSTIPULATETHECONDITIONSFORGIVINGTHISEUROPEANSTANDARDTHESTATUSOFANATIONALSTANDARDWITHOUTANYALTERATIONUPTODATELISTSANDBIBLIOGRAPHICALREFERENCESCONCERNINGSUCHNATIONALSTANDARDSMAYBEOBTAINEDONAPPLICATIONTOTHEMANAGEMENTCENTREORTOANYCENMEMBERTHISEUROPEANSTANDARDEXISTSINTHREEOFFICIALVERSIONSENGLISH,FRENCH,GERMANAVERSIONINANYOTHERLANGUAGEMADEBYTRANSLATIONUNDERTHERESPONSIBILITYOFACENMEMBERINTOITSOWNLANGUAGEANDNOTIFIEDTOTHEMANAGEMENTCENTREHASTHESAMESTATUSASTHEOFFICIALVERSIONSCENMEMBERSARETHENATIONALSTANDARDSBODIESOFAUSTRIA,BELGIUM,CZECHREPUBLIC,DENMARK,FINLAND,FRANCE,GERMANY,GREECE,HUNGARY,ICELAND,IRELAND,ITALY,LUXEMBOURG,MALTA,NETHERLANDS,NORWAY,PORTUGAL,SLOVAKREPUBLIC,SPAIN,SWEDEN,SWITZERLANDANDUNITEDKINGDOMEUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITEUROPENDENORMALISATIONEUROPISCHESKOMITEEFRNORMUNGMANAGEMENTCENTRERUEDESTASSART,36B1050BRUSSELS2003CENALLRIGHTSOFEXPLOITATIONINANYFORMANDBYANYMEANSRESERVEDWORLDWIDEFORCENNATIONALMEMBERSREFNOEN4482003ECOPYRIGHTEUROPEANCOMMITTEEFORSTANDARDIZATIONPROVIDEDBYIHSUNDERLICENSEWITHCENNOTFORRESALENOREPRODUCTIONORNETWORKINGPERMITTEDWITHOUTLICENSEFROMIHS,EN4482003E2CONTENTSPAGEFOREWORD4INTRODUCTION51SCOPE62NORMATIVEREFERENCES63TERMSANDDEFINITIONS74REQUIREMENTS841STEELPARTS8411QUALITY8412WALLTHICKNESSANDDIAMETER8413BENDS8414TPIECES9415REDUCERS9416ANCHORS9417FUSIONWELDINGOFSTEELFITTINGS10418SURFACECONDITION1242CASING1243POLYURETHANERIGIDFOAMINSULATIONPUR1244FITTINGASSEMBLIES12441FITTINGENDS12442ANGLEBETWEENCASINGSEGMENTSOFBENDANDMINIMUMLENGTH13443REQUIREMENTSOFPOLYETHYLENEWELDING13444LEAKTIGHTNESSOFTHEWELDEDCASINGPIPE15445INCREASEINDIAMETEROFTHECASINGPIPE16446MINIMUMINSULATIONTHICKNESSINBENDS16447TOLERANCESOFTHEMAINFITTINGDIMENSIONS165TESTMETHODS1751GENERAL1752TESTSPECIMENS1753STEELPARTS17531VISUALSURFACEEXAMINATIONOFWELDS17532LEAKTIGHTNESSTESTWITHWATER17533LEAKTIGHTNESSTESTWITHAIR17534RADIOGRAPHICEXAMINATIONOFBUTTWELDS1854CASING1855POLYURETHANERIGIDFOAMINSULATIONPUR1856FITTINGASSEMBLIES18561CENTRELINEDEVIATIONANDANGULARDEVIATION18562VISUALEXAMINATIONOFWELDSONCASINGPIPES18563BENDINGTEST18564INCREASEINDIAMETEROFTHECASINGPIPE19565MINIMUMINSULATIONTHICK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