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J'UKUS.,..,,         _&.%XXTRANS/WP.15/2000/4 R page  2  #Xu~X%&.#  J(UKUS.,..,,         _   `     h      p   &.%XXTRANS/WP.15/2000/4 R    `     h      p   page  3  #Xu~X%&.# W!UKUS.,..,,        TRW6&A4X3' Letter6&A43'T  _&.%XXTRW6&A4W6&A46&A46&A4TB.++b >uQ!XBR? =  UEAz|t# p @ H@Et#t#?'F dEF ??'=G dE=G ?&%%&. UNITED R NATIONS  WGCz|2n ` @ H@E?2nJ?2n$??++7$   UEAz|   p @ H@E       #X7^X%&#&%XX7^#&.%%&#&R- %%&.Distr.#&.% %&R- #&%%&.#X7^X%&# i     &%XX7^#&.%%&T#&R- %%&.GENERAL E      TRANS/WP.15/2000/4  25February2000  0   ## 0  Original:ENGLISH#&.% %&R-#&%%&.#X7^X%&# ? ## &%XX7^#&.%%&#&R- %%&.ECONOMICCOMMISSIONFOREUROPE =  H.++b >uQ!?? H INLANDTRANSPORTCOMMITTEE  WorkingPartyontheTransport [ ofDangerousGoods(Sixtyeighthsession, e agendaitem4(a),#&.% %&R- #&%%&.#X7^X%&] # A &%XX7^#&.%%& #& %%&.Geneva,519May2000)    PROPOSALSFORAMENDMENTSTOANNEXESAANDBOF_ADR_Tankvehicles i ReportonthemeetingoftheinformalWorkingGroupontankvehicles#&.% %& #& %%&. ! TransmittedbytheGovernmentofGermany !  L $5h(#%L  1. v TheinformalWorkingGroupontankvehicles(seeTRANS/WP.15/159,parak.k29)metinBerlinon !?# 11and12January2000toconsiderquestionsconcerningtheupdatingofAnnexBto_ADR_.L 'Eh(($L &   &82Eh  2  .3  0 v   ThemeetingwaschairedbyMr.K.Ridder(Germany).&8c݌%$ &v#v# Ќ  3. v Representativesofthefollowingcountriesparticipated:France,Germany,Italy,Netherlands, %"( Poland,Portugal,SpainandtheUnitedKingdom.L (Uh(('L4. v ItwastheaimofthemeetingoftheWorkingGrouptohavesomeindepthdiscussionsonthe q(%+ technicalbackgroundofanumberofquestionswhich,owingtotheproposalssubmittedbyGermany,couldnotbesolvedatthesixtyseventhsessionofWP.15inGeneva.Itwasintendedtopreparedecisions(some )*&- ofthemonceagain)tobetakenontheGermanproposalsatthesixtyeighthsessioninMay2000. +'.   L )eh(((L  5. v Themainproposalsputupfordiscussionwerethosethathadbeentransmittedforthesixtyseventh ,k)0 session;theywereincludedindocuments:  GE.00 -0,4=   TRANS/WP.15/1999/49andTRANS/WP.15/1999/51.6DocumentTRANS/WP.15/1999/48containedadditionalexplanationsrelatingthereto.L *uh(()L &   &2uh  6  .3  0 v   Mr.Ludwig(Germany)ledthediscussionsontechnicalissues.&݌ Lv#v# Ќ  7. v ThediscussionscentredondocumentTRANS/WP.15/1999/51dealingwith alternative   arrangements.L h((*L8. v Forthepurposesofjustificationfromthetechnicalpointofview,MrLudwiggavesome j  explanationsonthedifferencesbetweentherequirementsfortheminimumwallthicknessesoftankvehicles.Reductionsofthewallthicknessarebasicallypermittedifcompensatingmeasurestoprotectthetankareprovidedatthesametime.Referencetothisismadeinmarginal211127(3)and(4).!  ! !++7!UKUK.,"&I % %&  & % %"&I!G  B+ 4 <DL!!B!G݌̌UK.,UK.,& % %&   ++7X  L +h((L?+ 4 <DL!++7?9.  Marginal211127(5)(b)givesfourexamplesofmeasuresdesignedtocompensateforthereduction   ofthewallthickness,ofwhichhoweveronlytwoactuallyservethepurposeofcompensation:thesearethemeasuresdescribedunderitem2(doublewalls,thespacebetweenbeing_vacuated_Ԁofair)anditem3(doublewallshavinganintermediatelayerofsolidmaterials).!  ! !X!UKUK.,"&I % %&  & % %"&I!  B+ 4 <DL!!B!݌̌UK.,UK.,& % %&   XX   L ,h((+L?+ 4 <DL!X?10.  Theprotectivemeasuresindicatedinitem1(strengtheningmembers)anditem4(longitudinal 0 reinforcement)donotfullycompensateforthepermittedreductionofthewallthickness.!  ! !X!UKUK.,"&I % %&  & % %"&I!   B+ 4 <DL!!B! ݌̌UK.,UK.,& % %&   XX    L -h((,L?+ 4 <DL!X?11.  Iftheexistingtransportregulationsareapplied,thiswillinevitablyresultinthefactthatthereare  differentsafetylevelsinthecaseoftankswithreducedwallthickness.!  ! !X!UKUK.,"&I % %&  & % %"&I!#  B+ 4 <DL!!B!##݌̌UK.,UK.,& % %&   XX  !  ! !X!UKUK.,"&I % %&  & % %"&I!$  B+ 4 <DL!!B  Thisopinionwassharedbytheparticipants.!$3%݌ *X ЌUK.,UK.,& % %&   XX  !  ! !X!UKUK.,"&I % %&  & % %"&I!e&  B+ 4 <DL!!B!e&&݌̌UK.,UK.,& % %&   XX  ?+ 4 <DL!X?12.  Germanyreferredtothe alternativearrangementsincludedintheUNRecommendationsandin  the_IMDG_ԀCode.Anassessmentofthesafetyprovidedbythesolutions(inthesenseof alternativearrangements)thataredescribedthereshouldbemadebythecompetentauthorities(discretionarydecision).!  ! !X!UKUK.,"&I % %&  & % %"&I!)  B+ 4 <DL!!B!)6*݌̌UK.,UK.,& % %&   XX  ?+ 4 <DL!X?13.  TheGermanproposaltoincorporatethese alternativearrangementsintheprovisionsof_ADR_ ."\! makesitnecessaryfromtheGermanpointofviewtodevelopariskorientedandsafetyrelatedmethodofassessmentsothatitwillbepossibletomeasurethecompensationforcertainsafetyrelatedtankelements(e.g.wallthickness)providedbyothersafetyrelatedtankelements.!  ! !X!UKUK.,"&I % %&  & % %"&I!-  B+ 4 <DL!!B!--݌̌UK.,UK.,& % %&   XX    L .գ((-L?+ 4 <DL!X?14.  TheWorkingGrouprecommendedtoputintopracticethispartoftheproposal,thatistodevelop z& & anassessmentmethod(intheappendixtodocument51,Germanyonlydescribedsuchamethodwhichwasintendedasabasicexample  withoutclaimingthatitshouldbeconsideredasanintegralpartofthe 2(`"( proposal);thisshould,however,bedoneindependentlyofthedecisiontoinclude alternativearrangementsin_ADR_Ԁ(by_CEN_/TC296/WG2,ifappropriate)#&.% %& #& %%&.. )$* !  ! !X!UKUK.,"&I % %&  & % %"&I!1  B+ 4 <DL!!B!12݌̌UK.,UK.,& % %&   XX   L /((.L?+ 4 <DL!X?15.  Abasicdecisioninthesenseasmentionedaboveishoweverrequiredinthisconnection.IfWP.15 +%, givesthegreenlightfortheamendmentto_ADR_,therewillbesufficientreasontocarryoutcorrespondingstandardizationwork.!  ! !X!UKUK.,"&I % %&  & % %"&I!95  B+ 4 <DL!!B!955݌̌UK.,UK.,& % %&   XX  !  ! !X!UKUK.,"&I % %&  & % %"&I!6  B+ 4 <DL!!B  Forthispurpose,documentTRANS/WP.15/1999/51willhavetoberevisedappropriatelyand /@)0 submittedatthesixtyeighthsession.!6N7݌ /*1 ЌUK.,UK.,& % %&   XX  !  ! !X!UKUK.,"&I % %&  & % %"&I!8  B+ 4 <DL!!B!89݌̌UK.,UK.,& % %&   XX  L 0((/L?+ 4 <DL!X?16.  Mr.Ludwiggaveanintroductionintodocument49inconnectionwithdocument48which  comprisedboththejustificationfromthesafetypointofviewwithrespecttothemodificationofthe7equivalenceformula(cubicrootformula)andthedeductionofthealternative(new)equivalenceformulafromthelawsofengineeringmechanics.!  ! !X!UKUK.,"&I % %&  & % %"&I!=  B+ 4 <DL!!B!=>݌̌UK.,UK.,& % %&   XX  L ((0L?+ 4 <DL!X?17.  Inthisconnection,referencewasalsomadetotheresultsoftheWorkingGroupmeetingsinthe  ( previousyearsasregardstheequivalenceformula.Theparticipatingcountriesdidnotcometoanagreement.Mra.aLudwigemphasizedthatthiswas,inparticular,duetoeconomicconsiderations.AnewcubicrootformulasuchasbthatbcwascsuggestedbyGermanywasnotadopted.!  ! !X!UKUK.,"&I % %&  & % %"&I!A  B+ 4 <DL!!B!A[B݌̌UK.,UK.,& % %&   XX  L 1(( L?+ 4 <DL!X?18.  Attheendofthediscussionsd,ditremainstobesaidthatthemajorityofthemembersoftheWorking Ft  Groupconsideredthe equivalentwallthicknessformulasuggestedbyGermanyasapplicabletakingintoaccountitsresults,thatisthewallthicknessessderivedfromitfordifferentmetals.!  ! !X!UKUK.,"&I % %&  & % %"&I!CE  B+ 4 <DL!!B!CEE݌̌UK.,UK.,& % %&   XX  L 2%((1L?+ 4 <DL!X?19.  OnlytheUnitedKingdomwasnotpreparedtoagreetotheresultsofthediscussionsbecause#&.% %&2#& %%&.Ԁthe   accidentsoccurringintheUenitedeKfingdomfdidnotappeartorequiresuchamendmenttoADR.!  ! !X!UKUK.,"&I % %&  & % %"&I!H  B+ 4 <DL!!B!H6I݌̌UK.,UK.,& % %&   XX  L 35((2L?+ 4 <DL!X?20.  TheWorkingGroupg,ghoweverh,hrecommendedthatGermanychangethejustificationindocument Jx TRANS/WP.15/1999/49,thatistheexcessivedetailsgivenwithrespecttothetechnicalbackgroundoftheproposalwouldbeunnecessaryforthedecisiontobetakenbyWP.15.!  ! !X!UKUK.,"&I % %&  & % %"&I!L  B+ 4 <DL!!B!LL݌̌UK.,UK.,& % %&   XX  L 4E((3L?+ 4 <DL!X?21.  Mri.iLudwigrecommendedjtojtheItalianrepresentativethat,inviewoftheproposalfor alternative  arrangements,documentTRANS/WP.15/R.405(_polycentric_Ԁtanks)shouldbecombinedwiththisproposaland,ifappropriate,beassessedbyCEN/TC296/WG2.Atpresent,itwillnotbepossibleforWP.15todecideonthispaperbecauseadecisionisduetobetakenondocument51,thatistosaythatItalymightdeferR405forthetimebeing.!  ! !X!UKUK.,"&I % %&  & % %"&I!BP  B+ 4 <DL!!B!BPP݌̌UK.,UK.,& % %&   XX  L 5U((4L  22.  GermanystilldoesnotconsiderittobeadvisabletodealwiththeGermanproposalforthe  reinforcementofthereartankend(rearimpactprotection)beforeadecisionistakenontheproposalscontainedindocuments#&.% %&G#  TRANS/WP.15/1999/49andTRANS/WP.15/1999/51.    ___________