1、BRITISH STANDARD BS EN 326-3:2003 Wood-based panels Sampling, cutting and inspection Part 3: Inspection of an isolated lot of panels The European Standard EN 326-3:2003 has the status of a British Standard ICS 79.060.01 BS EN 326-3:2003 This British Standard was published under the authority of the
2、Standards Policy and Strategy Committee on 10 May 2004 BSI 10 May 2004 ISBN 0 580 43754 X National foreword This British Standard is the official English language version of EN 326-3:2003. It supersedes BS EN 326-3:1998 which is withdrawn. The UK participation in its preparation was entrusted to Tec
3、hnical Committee B/541, Wood based panels, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document ma
4、y be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users
5、are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, a
6、nd keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover. The BSI copyright notice displayed in this docum
7、ent indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN3263 November2003 ICS79.060.01 SupersedesEN3263:1998 Englishversion WoodbasedpanelsSampling,cuttingandinspectionPart3: Inspectionofanisolatedlot
8、ofpanels PanneauxbasedeboisEchantillonnage,dcoupeet contrlePartie3:Contrledunlotisoldepanneaux HolzwerkstoffeProbenahme,Zuschnittundberwachung Teil3:AbnahmeprfungeineseinzelnenLosesvon Platten ThisEuropeanStandardwasapprovedbyCENon1September2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalR
9、egulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialver
10、sions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany
11、Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexplo
12、itationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN3263:2003EEN3263:2003(E) 2 Contents page Foreword. 3 1 Scope . 4 2 Normativereferences . 4 3 Symbol . 4 3.1 Lettersymbols (seealsoEN3261andEN3262) 4 3.2 Indices (seealsoEN3261) . 5 4 Termsanddefinitions. 5 5 Verificationo
13、fcompliance . 5 5.1 Inspectionbody. 5 5.2 Sampling 6 5.2.1 Lotidentification . 6 5.2.2 Samplingofpanels . 6 5.3 Inspectionbyvariables . . 8 5.3.1 Samplingandcuttingoftestpieces . 8 5.3.2 Expressionoftestresults 8 5.3.3 Evaluationoftestresults . 8 5.4 Inspectionbyattributes . 9 5.4.1 General. 9 5.4.2
14、 Singlesamplingplan 9 5.4.3 Doublesamplingplan . 9 6 Inspectionreport. 10 Bibliography . 11EN3263:2003(E) 3 Foreword Thisdocument(EN3263:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC112“Woodbased panels”,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,
15、eitherbypublicationofanidentical textorbyendorsement,atthelatestbyMay2004,andconflictingnationalstandardsshallbewithdrawnatthe latestbyMay2004. Thisstandardisoneofaseriesonsampling,cuttingandinspectionofwoodbasedpanels.Theotherpartsof thisseriesarelistedinclause2. ThisEuropeanStandardsupersedesEN326
16、3:1998.ComparedtotheversionEN3263:1998thefollowing modificationshavebeenmade: a) Thetitlehasbeenchangedtoisolatedlot. b) InspectionlotsizesandsamplesizesmodifiedtakingintoaccountISO28592forisolatedlotinspection. c) Differentsamplesizesaregivendependingwhetherornottheproductioniscontrolledaccordingto
17、 EN3262. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands, Norway,Portugal,Slov
18、akia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN3263:2003(E) 4 1Scope ThisEuropeanStandardspecifiesmethodsfortheverificationofcomplianceofoneormorepropertiesofan isolatedlotofwoodbasedpanelswiththerequirementsoftherelevantENspecificationstandards.Different samplesizesaregivendependingonwhetherorn
19、ottheproductioniscontrolledaccordingtoEN3262. Forpanels,theproductionofwhichiscontrolledinaccordancetoEN3262thisEuropeanStandardcanbe usedincaseofadispute.Itisnotapplicableforthefactoryproductioncontrol.Forthesepurposes,EN3262 applies. Inthisstandard,verificationofcomplianceisbasedonthetestingofsmal
20、ltestpieces. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelisted hereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicat
21、ionsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies(includingamendments). EN3261:1994, WoodbasedpanelsSampling,cuttingandinspectionPart1:Samplingandcuttingof testpiecesandexpressionoftestresults. EN3262,
22、 WoodbasedpanelsSampling,cuttingandinspectionPart2:Qualitycontrolinthefactory. ISO28591, Samplingproceduresforinspectionbyattributes Part 1:Samplingschemesindexedby acceptablequalitylimit( AQL)forlotbylotinspection. ISO28592, SamplingproceduresforinspectionbyattributesPart2:Samplingplansindexedbylim
23、iting quality(L Q)forisolatedlotinspection. 3Symbol 3.1Letter symbols (seealsoEN3261andEN3262) Ac Acceptancenumber AQL Acceptablequalitylevel L Lowerspecificationlimit m Numberoftestpiecescutfromeachsinglepanelofthesample,ineitherdirection n Samplesize(numberofpanels) N Numberofpanelsinonelot,i.e.lo
24、tsize Re Rejectionnumber t Singlesided5%valuefactorrelatedtothenumberofpanels U UpperspecificationlimitEN3263:2003(E) 5 3.2Indices (seealsoEN3261) cu Cumulativevalue d Relatedtodoublesampleplan l,attr Relatedtolotinspectionbyattributes l,var Relatedtolotinspectionbyvariables i Serialtestpiecenumberw
25、ithinapanel( i=1,2,., n) j Testpanelidentificationnumberwithinasample( j=1,2,., m) si Relatedtosinglesamplingplan 4 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN3261andinEN3262and thefollowingapply. 4.1 attribute qualitycharacteristicwhichapaneldoordonotpos
26、sessandwhichisusedtodetermineconformancewith theacceptabilitycriteriaoftheinspection 4.2 limitingquality (LQ) qualitylevelwhich,forthepurposeofsamplinginspection,islimitedtoalowprobabilityofacceptancewhena lotisconsideredinisolationISO28591:1999,definition3.1.28 4.3 lot numberofpanels(N)fromthesamem
27、anufacturerofasingletype,grade,class,thicknessrangeorthickness, fromwhichasample(n)istobedrawnforinspectiontodetermineconformancewiththeacceptabilitycriteria ofthecharacteristicstobecontrolled 4.4 variable numericalqualitycharacteristicwhichisusedtodetermineconformancewiththeacceptabilitycriteriaoft
28、he inspection 5 Verificationofcompliance 5.1Inspection body Theinspectionofanisolatedlotof panelsshallbecarriedoutbyarecognised,independentagency,or otherwisebyagreementbetweenthepartiesconcerned.Inthecaseofaconstructionproducttheindependent agencyshallbeanotifiedbody.EN3263:2003(E) 6 5.2Sampling 5.
29、2.1 Lotidentification Thelotfromwhichthesampleforinspectionistobetakenshallconsistonlyofpanelsfromthesame manufacturerandofasingletype,grade,class,thicknessrangeorthickness. 5.2.2 Samplingofpanels 5.2.2.1General Thenumberofpanelstobeselectedatrandomfortestingfromeachinspectionlotdependsonthesizeofth
30、e inspectionlotandthecontrolstatus. 5.2.2.2 Samplesizeforinspectionbyvariables Thesizeofthesample n l,var isgiveninTable1. Table1Thesizeofthesample n l,var inrelationtothesize ofthelot N l,var wheninspectingbyvariables Samplesize n l,var Lotsize N l,var Panelscontrolled accordingtoEN3262 Panelsnotco
31、ntrolled accordingtoEN3262 90 5 7 91to150 7 10 151to280 10 15 281to500 15 25 501to1200 20 35 1201to3200 25 50 3201to10000 35 75 10001to35000 50 100 Largerlotsshall besubdivided ThesesamplesizescorrespondtoISO 3951toanormalinspection oflevellforpanelscontrolledaccordingtoEN3262andtoanormal inspection
32、oflevelIIforuncontrolledpanels,respectively. 5.2.2.3 Samplesizeforinspectionbyattributes 5.2.2.3.1General Todeterminetheacceptabilityofaninspectionlotasingleoradoublesamplingplanshallbeused.The choiceofsamplingplanshallbemadebeforedrawingthesample. 5.2.2.3.2 Singlesamplingplan Thesizeofthesample n l
33、attr,si forasinglesamplingplanisgiveninTable2.EN3263:2003(E) 7 Table2Singlesamplingplanforinspectionbyattributes Samplesize n l,attr,si Lotsize N l,attr Panelscontrolled accordingtoEN3262 Panelsnotcontrolled accordingtoEN3262 90 5 34 91to150 8 38 151to280 13 42 281to500 20 50 501to1200 32 80 1201to
34、3200 50 125 3201to10000 80 200 10001to35000 125 315 Largerlotsshall besubdivided Thesesamplesizescorrespondtoanormalinspectionoflevellforan AQLvalueof4 %accordingtoISO 28591forpanelscontrolledin accordancewithEN 3262anda LQvalueof5 %accordingto ISO28592foruncontrolledpanels,respectively.Theseinspect
35、ionlevels correspondtotherequirementthatatleast95%oftheinspectionlotare foreachpropertyabovetherequiredqualitylevel. 5.2.2.3.3 Doublesamplingplan Thesizeofthefirstsample n l,attr,d foradoublesamplingplanisgiveninTable3.Thesecondsamplesizeshall beequaltothefirstsamplesize,andthecorrespondingtotalsamp
36、lesizeofdoublesampling n l,cu isgivenin Table3.Both,thefirstandsecondsampleshallbedrawnfromthewholeinspectionlotatrandom.EN3263:2003(E) 8 Table3Doublesamplingplanforinspectionbyattributes Samplesize n l,attr Panelscontrolledaccordingto EN3262 Panelsnotcontrolledaccordingto EN3262 first sample second
37、 sample cumulative first sample second sample cumulative Lotsize N l,attr 1 n l,attr,d 2 n l,attr,d n l,cu 1 n l,attr,d 2 n l,attr,d n l,cu 90 91to150 5 5 10 151to280 8 8 16 281to500 13 13 26 501to1200 20 20 40 Usecorresponding singlesamplingplan 1201to3200 32 32 64 80 80 160 3201to10000 50 50 100 1
38、25 125 250 10001to35000 80 80 160 200 200 400 Thesesamplesizescorrespondtoanormalinspectionoflevellforan AQLvalueof4%accordingto ISO28591forpanelscontrolledinaccordancetoEN3262andofaLQvalueof5 %accordingto ISO28592foruncontrolledpanels,respectively. 5.3 Inspectionbyvariables 5.3.1 Samplingandcutting
39、oftestpieces Theminimumnumberoftestpieces mwhichshallbecutfromeachpanelisgiveneitherinEN3261orinthe ENfortherelevanttestmethod,orotherwiseshallbeagreedwiththeInspectionbody. Thecuttingoftestpiecesshallbecarriedoutinaccordancewithclause6ofEN3261:1994. 5.3.2 Expressionoftestresults Theexpressionoftest
40、resultsshallbeinaccordancewithclause7(7.1to7.3.5)ofEN3261:1994. 5.3.3 Evaluationoftestresults Theevaluationoftestresultsshallbecarriedoutinaccordancewithclause7(7.3.6)ofEN3261:1994. Theresultoftheinspectionissatisfactory,ifthecalculated L 5% isequaltoorgreaterthanthelower( L) specificationlimit,orif
41、 U 5% isequaltoorlowerthantheupper( U)specificationlimit. NOTE Theinspectionbyvariablescorrespondstotherequirementthatforeachpropertyatleast95%ofthelotare abovethelower( L)specificationlimit,orbelowtheupper( U)specificationlimit. Thetvaluesinrelationtothesamplesize n l,var aregiveninTable4.EN3263:20
42、03(E) 9 Table4Singlesided tvaluesinrelationtothesamplesize n l,var Samplesize n l,var 10 15 20 25 35 50 75 100 t 1,83 1,76 1,73 1,71 1,69 1,68 1,66 1,66 5.4 Inspectionbyattributes 5.4.1General Inordertoevaluatethetestresultswherethepanelisclassifiedsimplyas“defective”or“nondefective”,the inspectionbyattributesshallbecarriedout. 5.4.2 Singlesamplingplan Thesizeofthesample n l,attr,si forasinglesamplingplandependsonthesizeofthelot N l,attr asgivenin Table2. Ifthenumberofdefectivesfoundinthesampleisequalto,orlessthantheacceptancenumber AcofTable5, thelotshallbeconsideredacceptab
