bs en 448-2003區(qū)域供暖管道.直埋式熱水供應(yīng)網(wǎng)用預(yù)先絕熱連接的管道系統(tǒng).聚氨酯熱絕緣和聚乙烯外覆層鋼管用成套配件

BSEN4482003區(qū)域供暖管道直埋式熱水供應(yīng)網(wǎng)用預(yù)先絕熱連接的管道系統(tǒng)聚氨酯熱絕緣和聚乙烯外覆層鋼管用成套配件BRITISHSTANDARDBSEN4482ABRITISHSTANDARDICS23ALISTOFORGANIZATIONSREPRESENTEDONTHISSUBCOMMITTEECANBEOBTAINEDONREQUESTTOITSSECRETARYCROSSREFERENCESTHEBRITISHSTANDARDSWHICHIMPLEMENTINTERNATIONALOREUROPEANPUBLICATIONSREFERREDTOINTHISDOCUMENTMAYBEFOUNDINTHEBSICATALOGUEUNDERTHESECTIONENTITLED“INTERNATIONALSTANDARDSCORRESPONDENCEINDEX”,ORBYUSINGTHE“SEARCH”FACILITYOFTHEBSIELECTRONICCATALOGUEOROFBRITISHSTANDARDSONLINETHISPUBLICATIONDOESNOTPURPORTTOINCLUDEALLTHENECESSARYPROVISIONSOFACONTRACTUSERSARERESPONSIBLEFORITSCORRECTAPPLICATIONCOMPLIANCEWITHABRITISHSTANDARDDOESNOTOFITSELFCONFERIMMUNITYFROMLEGALOBLIGATIONSAIDENQUIRERSTOUNDERSTANDTHETEXTPRESENTTOTHERESPONSIBLEINTERNATIONAL/EUROPEANCOMMITTEEANYENQUIRIESONTHEINTERPRETATION,ORPROPOSALSFORCHANGE,ANDKEEPTHEUKINTERESTSINFORMEDMONITORRELATEDINTERNATIONALANDEUROPEANDEVELOPMENTSANDPROMULGATETHEMINTHEUKSUMMARYOFPAGESTHISDOCUMENTCOMPRISESAFRONTCOVER,ANINSIDEFRONTCOVER,THEENTITLEPAGE,PAGES2TO28,ANINSIDEBACKCOVERANDABACKCOVERTHEBSICOPYRIGHTDATEDISPLAYEDINTHISDOCUMENTINDICATESWHENTHEDOCUMENTWASLASTISSUEDAMENDMENTSISSUEDSINCEPUBLICATIONAMDNODATECOMMENTSCOPYRIGHTEUROPEANCOMMITTEEFORSTANDARDIZATIONPROVIDEDBYIHSUNDERLICENSEWITHCENNOTFORRESALENOREPRODUCTIONORNETWORKINGPERMITTEDWITHOUTLICENSEFROMIHS,EUROPEANSTANDARDNORMEEUROP0ENNEEUROP0ISCHENORMEN448FEBRUARY2ANATIONALSTANDARDWITHOUTANYALTERATIONUPTODATELISTSANDBIBLIOGRAPHICALREFERENCESCONCERNINGSUCHNATIONALSTANDARDSMAYBEOBTAINEDONAPPLICATIONTOTHEMANAGEMENTCENTREORTOANYCENMEMBERTHISEUROPEANSTANDARDEXISTSINTHREEOFFICIALVERSIONSENGLISH,FRENCH,GERMANAVERSIONINANYOTHERLANGUAGEMADEBYTRANSLATIONUNDERTHERESPONSIBILITYOFACENMEMBERINTOITSOWNLANGUAGEANDNOTIFIEDTOTHEMANAGEMENTCENTREHASTHESAMESTATUSASTHEOFFICIALVERSIONSCENMEMBERSARETHENATIONALSTANDARDSBODIESOFAUSTRIA,BELGIUM,CZECHREPUBLIC,DENMARK,FINLAND,FRANCE,GERMANY,GREECE,HUNGARY,ICELAND,IRELAND,ITALY,LUXEMBOURG,MALTA,NETHERLANDS,NORWAY,PORTUGAL,SLOVAKREPUBLIC,SPAIN,SWEDEN,SWITZERLANDANDUNITEDKINGDOMEUROPEANCOMMITTEEFORSTANDARDIZATIONCOMIT0EUROP0ENDENORMALISATIONEUROP0ISCHESKOMITEEF0RNORMUNGMANAGEMENTCENTRERUEDESTASSART,36B1AINFORMATIVEGUIDELINESFORINSPECTIONANDTESTING21COPYRIGHTEUROPEANCOMMITTEEFORSTANDARDIZATIONPROVIDEDBYIHSUNDERLICENSEWITHCENNOTFORRESALENOREPRODUCTIONORNETWORKINGPERMITTEDWITHOUTLICENSEFROMIHS,EN4482A1MANUFACTURERSTYPETEST21A2MANUFACTURERSQUALITYSURVEILLANCE21A3EXTERNALINSPECTION21A4EXTENTOFINSPECTION21A5MANUFACTURERSRESPONSIBILITY21ANNEXBINFORMATIVEPROCEDURESFORPOLYETHYLENEWELDING24B1INTRODUCTION24B2REQUIREMENTSFORSITE,MACHINEANDEQUIPMENT24B3ITEMS24B4BUTTFUSIONWELDING25B41EQUIPMENT25B42WELDINGPROCEDURE26B5EXTRUSIONWELDING26B51EQUIPMENT26B52WELDINGPROCEDURE27BIBLIOGRAPHY28COPYRIGHTEUROPEANCOMMITTEEFORSTANDARDIZATIONPROVIDEDBYIHSUNDERLICENSEWITHCENNOTFORRESALENOREPRODUCTIONORNETWORKINGPERMITTEDWITHOUTLICENSEFROMIHS,EN4482ANATIONALSTANDARD,EITHERBYPUBLICATIONOFANIDENTICALTEXTORBYENDORSEMENT,ATTHELATESTBYAUGUST2AANDBAREINFORMATIVETHISDOCUMENTINCLUDESABIBLIOGRAPHYACCORDINGTOTHECEN/CENELECINTERNALREGULATIONS,THENATIONALSTANDARDSORGANIZATIONSOFTHEFOLLOWINGCOUNTRIESAREBOUNDIMPLEMENTTHISEUROPEANSTANDARDAUSTRIA,BELGIUM,CZECHREPUBLIC,DENMARK,FINLAND,FRANCE,GERMANY,GREECE,HUNGARY,ICELAND,IRELAND,ITALY,LUXEMBOURG,MALTA,NETHERLANDS,NORWAY,PORTUGAL,SLOVAKIA,SPAIN,SWEDEN,SWITZERLANDANDTHEUNITEDKINGDOMCOPYRIGHTEUROPEANCOMMITTEEFORSTANDARDIZATIONPROVIDEDBYIHSUNDERLICENSEWITHCENNOTFORRESALENOREPRODUCTIONORNETWORKINGPERMITTEDWITHOUTLICENSEFROMIHS,EN4482ASTEELSERVICEPIPEANDAPOLYETHYLENECASINGFORINFORMATIONONTHEMINIMUMEXPECTEDTHERMALLIFEWITHOPERATIONATVARIOUSTEMPERATURESWITHRESPECTTOPURFOAMPERFORMANCESEEEN2532ASTEELSERVICEFITTINGFROMDN2AOFTHISSTANDARDPROCEDURESFORPEWELDINGAREGIVENINANNEXBOFTHISSTANDARDNOTETHISSTANDARDDOESNOTINCLUDERULESFORCALCULATIONOFLOADSANDSTRESSES2NORMATIVEREFERENCESTHISEUROPEANSTANDARDINCORPORATESBYDATEDORUNDATEDREFERENCE,PROVISIONSFROMOTHERPUBLICATIONSTHESENORMATIVEREFERENCESARECITEDATTHEAPPROPRIATEPLACESINTHETEXT,ANDTHEPUBLICATIONSARELISTEDHEREAFTERFORDATEDREFERENCES,SUBSEQUENTAMENDMENTSTOORREVISIONSOFANYOFTHESEPUBLICATIONSAPPLYTOTHISEUROPEANSTANDARDONLYWHENINCORPORATEDINITBYAMENDMENTORREVISIONFORUNDATEDREFERENCESTHELATESTEDITIONOFTHEPUBLICATIONREFERREDTOAPPLIESINCLUDINGAMENDMENTSEN2532ADEVIATIONINDIRECTIONOFTHESTEELPIPECENTRELINES34FORGEDTPIECEMANUFACTUREDBYHOTFORMINGOFEITHERSTEELPIPESORSTEELPLATESWHICHARESUBSEQUENTLYWELDEDTOGETHER35WELDINGSADDLEBUTTWELDINGFITTINGTOBEWELDEDINTOTHEMAINPIPEFORTHEWELDEDCONNECTIONBETWEENTHEMAINPIPEANDTHEBRANCHPIPEINATPIECE36WELDEDTPIECEMANUFACTUREDBYWELDINGTOGETHERPIECESOFSTEELPIPESWITHORWITHOUTTHEUSEOFAWELDINGSADDLEORADRAWNCOLLARONTHEMAINPIPEKEY31COLDFORMEDBEND32BUTTWELDINGBEND33BENDINGANGLE,A34FORGEDTPIECE35TPIECEWITHWELDINGSADDLE36ATPIECEWITHDRAWNCOLLAR36BDIRECTLYWELDEDTPIECEFIGURE1EXAMPLESCOPYRIGHTEUROPEANCOMMITTEEFORSTANDARDIZATIONPROVIDEDBYIHSUNDERLICENSEWITHCENNOTFORRESALENOREPRODUCTIONORNETWORKINGPERMITTEDWITHOUTLICENSEFROMIHS,EN4482AFIXEDPOINT4REQUIR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