BS EN 720-1-1999 Transportable gas cylinders Ð Gas

|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||BRITISHSTANDARDBSEN720-1:1999TheEuropeanStandardEN720-1:1999hasthestatusofaBritishStandardICS23.020.30;71.100.20;75.160.30NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAWTransportablegascylindersÐGasesandgasmixturesÐPart1:PropertiesofpuregasesThisBritishStandard,havingbeenpreparedunderthedirectionoftheEngineeringSectorCommittee,waspublishedundertheauthorityoftheStandardsCommitteeandcomesintoeffecton15August1999©BSI08-1999ISBN058032138XBSEN720-1:1999AmendmentsissuedsincepublicationAmd.No.DateCommentsNationalforewordThisBritishStandardistheEnglishlanguageversionofEN720-1:1999.TheUKparticipationinitspreparationwasentrustedbyTechnicalCommitteePVE/3,Gascontainers,toSubcommitteePVE/3/1,Valvefittingsforgascylinders,whichhastheresponsibilityto:Ðaidenquirerstounderstandthetext;Ðpresenttotheresponsibleinternational/Europeancommitteeanyenquiriesontheinterpretation,orproposalsforchange,andkeeptheUKinterestsinformed;ÐmonitorrelatedinternationalandEuropeandevelopmentsandpromulgatethemintheUK.Alistoforganizationsrepresentedonthissubcommitteecanbeobtainedonrequesttoitssecretary.Cross-referencesTheBritishStandardswhichimplementinternationalorEuropeanpublicationsreferredtointhisdocumentmaybefoundintheBSIStandardsCatalogueunderthesectionentitledªInternationalStandardsCorrespondenceIndexº,orbyusingtheªFindºfacilityoftheBSIStandardsElectronicCatalogue.ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofacontract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.CompliancewithaBritishStandarddoesnotofitselfconferimmunityfromlegalobligations.SummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,theENtitlepage,pages2to8,aninsidebackcoverandabackcover.TheBSIcopyrightnoticedisplayedthroughoutthisdocumentindicateswhenthisdocumentwaslastissued.CENEuropeanCommitteeforStandardizationComiteÂEuropeÂendeNormalisationEuropaÈischesKomiteefuÈrNormungCentralSecretariat:ruedeStassart36,B-1050Brussels©1999CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.Ref.No.EN720-1:1999EEUROPEANSTANDARDEN720-1NORMEEUROPEÂENNEEUROPAÈISCHENORMApril1999ICS23.020.30;71.100.20;75.160.30EnglishversionTransportablegascylindersÐGasesandgasmixturesÐPart1:PropertiesofpuregasesBouteillesaÁgaztransportablesÐGazetmeÂlangesdegazÐPartie1:ProprieÂteÂsdesgazpursOrtsbeweglicheGasflaschenÐGaseundGasgemischeÐTeil1:EigenschaftenvonEinzelÐGasenThisEuropeanStandardwasapprovedbyCENon20December1998.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom.Page2EN720-1:1999©BSI08-1999ForewordThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC23,Transportablegascylinders,theSecretariatofwhichisheldbyBSI.ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbyOctober1999,andconflictingnationalstandardsshallbewithdrawnatthelatestbyOctober1999.AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom.ThisEuropeanStandardhasbeensubmittedforreferenceintotheRIDand/orinthetechnicalannexesoftheADR.ThereforeinthiscontextthestandardslistedinthenormativereferencesandcoveringbasicrequirementsoftheRID/ADRnotaddressedwithinthepresentstandardarenormativeonlywhenthestandardsthemselvesare.ContentsPageForeword3Introduction31Scope32Normativereferences33Definitions34Propertiesofgasmixtures35Codenumber46Listofgases4Page3EN720-1:1999©BSI08-1999IntroductionInEuropethereare2existingDirectiveswhichdealwiththeclassificationofgases.OnerelatestoDangerousSubstancesandPreparations,theothertotheTransportofDangerousGoods(ADR).TheseDirectiveshaveseveralconflictingclassifications,e.g.toxicityisexpressedinvolumepartspermillion(p.p.m.V)intheADRDirectiveandinmilligramsperlitre(mg/l)intheSubstancesandPreparationsDirective.Thepurposeofthisstandardistolistthepropertiesofindividualgasestofacilitatetheselectionofvalveoutlets.ThisisdifferentfromthescopeofthetwoDirectivesmentionedabove,whicharecon