BS EN ISO 1806-2002 Fishing nets - Determination of mesh breaking force of netting《鱼网 鱼网网眼断裂力的测定》.pdf

1、BRITISH STANDARD BS EN ISO 1806:2002 Fishing nets Determination of mesh breaking force of netting The European Standard EN ISO 1806:2002 has the status of a British Standard ICS 61.150 BS EN ISO 1806:2002 This British Standard, having been prepared under the direction of the Materials and Chemicals

2、Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 19 December 2002 BSI 19 December 2002 ISBN 0 580 40970 8 National foreword This British Standard is the official English language version of EN ISO 1806:2002. It is identical wit

3、h ISO 1806:2002. It supersedes BS 4650:1970 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee TCI/77, Ropes, cordage and fishing nets, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to i

4、ts secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electroni

5、c Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to under

6、stand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprise

7、s a front cover, an inside front cover, the EN ISO title page, pages 2 to 9 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO1

8、806 December2002 ICS65.150 Englishversion FishingnetsDeterminationofmeshbreakingforceofnetting (ISO1806:2002) FiletsdepcheDterminationdelaforcederupturedela mailledenappedefilet(ISO1806:2002) FischnetzeBestimmungderMaschenHchstzugkraftvon Netztuchen(ISO1806:2002) ThisEuropeanStandardwasapprovedbyCEN

9、on6July2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCe

10、ntreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbo

11、diesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeSt

12、assart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO1806:2002EENISO1806:2002(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Principle4 5 Apparatus .5 6 Sampling.5 7 Preparationofs

13、amples .5 8 Requirementsfortesting 6 9 Numberoftests. .6 10 Testprocedure . 6 11 Calculationandexpressionofresults .7 12 Testreport 7ENISO1806:2002(E) 3 Foreword ThisdocumentENISO1806:2002hasbeenpreparedbyTechnicalCommitteeCEN/TC248 “Textilesandtextile products“,thesecretariatofwhichisheldbyBSI,inco

14、llaborationwithTechnicalCommitteeISO/TC38“Textiles“. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJune2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby June2003. AccordingtotheCEN/CENELECInternalRegulat

15、ions,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.ENISO1806:2002(E)

16、 4 1Scope ThisEuropeanStandardspecifiesamethodofdeterminingthemeshbreakingforceofnettingforfishing. Testsmaybecarriedoutinboththedryandwetstates,buttestinthewetstateareconsideredtobeparticularly appropriateinindicatingthebehaviourofthenettinginuse. 2 Normativereferences ThisEuropeanStandardincorpora

17、tesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendm

18、entorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). ISO139, TextilesStandardatmospheresforconditioningandtesting. ISO1805, FishingnetsDeterminationofbreakingloadandknotbreakingloadofnettingyarns. 3 Termsanddefinitions ForthepurposesofthisEuropea

19、nStandard,thefollowingtermsanddefinitionsapply. 3.1 drymeshbreakingforce maximumforcemeasuredduringatensiletestonmeshesofnettinginstandardatmosphere 3.2 wetmeshbreakingforce maximumforcemeasuredduringatensiletestonmeshesofnettinginwetconditions 3.3 timetobreak time,inseconds,takentoreachthemeshbreak

20、ingforce,measuredfromthemomentofapplicationoftheforce 4Principle Ameshisextendedinthedryorwetstateuntiloneoftheknotsorjointsreachestheforceatrupture.Thetestis performedusingasuitableapparatusthatrecordsorindicatestheappliedforce. Thetestingmachineisoperatedatsucharatethattheaveragetimetobreakofagrou

21、pofsamplesfallswithin specifiedtimelimits.ENISO1806:2002(E) 5 5Apparatus 5.1Tensiletestingmachine 5.1.1 Anyofthefollowingtypesmaybeused: a) constantrateofelongationmachine; b) constantrateofforcemachine; c) constantrateoftraversemachine. Preferenceshouldbegiventoaconstantrateofelongationmachine. 5.1

22、.2 Theclampsofthetensiletestingmachinesshallbereplacedbypinsofstainlessmaterialwhichstandat rightanglestothedirectionofpull.Theseshallbeofsufficientstrengthandhaveadiametersuitableforthemesh size. Alternatively,loopsofnettingyarnheavierthanthatofthenettingshallbeused.Itisnecessarytousetheseloops ift

23、hemeshesareverysmall. 5.1.3 Itshallbepossibletoregulatethedistancebetweenthepinssothatnettingofdifferentmeshopeningscan besubmittedtothetest. 5.1.4 Themaximumerroroftheindicatedforceatanypointintherangeinwhichthemachineisusedshallnot exceed1%.Checktheaccuracyofthegraduatedscaleoftheapparatusdynamica

24、lly,forexamplebymeansof calibratedspringsofappropriatecharacteristics. 5.1.5 Alltestingmachinesshallincludefacilitiesforproducingdifferentratesofapplyingforceinordertobreak samplesinthespecifiedaveragetimetobreak. 5.2 Equipmentforproducingandmaintainingthestandardatmospherefortesting(see8.1) 5.3 Equ

25、ipmentinwhichsamplescanbeimmersedinwaterpreparatorytowettesting 5.4 Stopwatchorintervaltimer 6Sampling Testsamplesshallbeselectedatrandomfromthenettingsoastoberepresentativeofthewhole. 7 Preparationofsamples Topreventuntwistingofthelooseends,proceedasfollows. Cutthelooseendsofthesamplemeshasfaraspos

26、siblefromtheknotsorjoints.Wheneverpossible,melting insteadofcuttingispreferred. Ifduringtestingoneoftheknotsslipsbeforethebreakingforceisobtained,thenasampleofnettingwithasizeof 3 3meshesshallbeused. Themeshstrengthhastobedeterminedonthecentralmesh.ENISO1806:2002(E) 6 8 Requirementsfortesting 8.1Atm

27、ospherefortesting AsspecifiedinISO139,allsamplestobetestedinthedrystate(withtheexceptionofthesamplesforthetestin thewetstate)shallbeexposedtothestandardatmospherefortestingof20C2Candarelativehumidityof 65%2%untiltheyhavereachedequilibrium.Fornettingofmanmadefibres,aperiodof24hexposureis generallysuf

28、ficient.Whereitisnotpossibletocarryoutthetestsinthestandardatmospherethetestsshallbe carriedoutimmediatelyafterremovalofthesamplesfromthestandardatmosphere. 8.2Testinginthewetstate Allsamplestobetestedinthewetstateshallbefullywettedbeforetesting.Toachievewetting,theyshallbe immersedintapwaterwithout

29、wettingagentsatatemperatureof20C2Cforaperiodofnotlessthan12hor inachemicalsolutionof1gwettingagentper1litretapwateratatemperatureof20C2Cforaperiodof1h. Ashortertimeofimmersionisallowedifitcanbeshownthatthesampleiscompletelywettedinlessthan1h. 8.3Timetobreak Themeandurationoftestshouldbe20s3s.Itshall

30、bedeterminedbypreliminarytests. 9 Numberoftests Atleast10singletestsoneachpieceofnettingshallbecarriedout,unlessotherwiseagreedbetweenthe purchaserandsupplier.Ifadistinctconfidenceintervalforthemeanvalueisprescribed,asmanyadditionaltests shallbecarriedoutasarenecessarytosecurethisconfidenceinterval.

31、 10 Testprocedure 10.1 Checkthatthepinsorloopsofthetestingmachineareproperlyalignedandparallelsothatthesubsequent applicationofforcetothesamplewillnotcauseanyangulardeflection. 10.2 Mountthesampleinthetestingmachineoverthepinsorintheloopsinsuchawaythatitsknotsdonot touchthepinsorloops(seeFigures1and

32、2). 10.3 Wetsamplesshouldbetestedimmediatelyafterremovingfromwater(see8.2). 10.4 Applytheforcetoreachtheprescribedmeantimetobreak. 10.5 Ifasampledoesnotbreakatoneoftheknotsorjoints,thistestshallbediscarded. 10.6 Discardallobservationsobtainedonsamplesofwhichthelooseendsofthemeshslipintheknotsorthe j

33、ointsdistort.Suchatestshallberepeatedwithanewsample.Thenumberofobservationsdiscardedasdirected aboveshallbenoted.ENISO1806:2002(E) 7 10.7 Ifinmorethanhalfofthetests,theknotsslip,themethodofmeshtestingdescribedinthisEuropean Standardshallnotbeused.Itshallbereplacedbythemethodofdeterminingtheknotbreak

34、ingloadofnetting yarnsbyfasteningallfourendsintheholdingdevicesofthetestingmachine(seeISO1805).Ifthemeshesaretoo smalltoensurethatallfourendsoftheknotaregrippedbytheholdingdevices,theknotsaroundtheknottobe testedshallbeopened(seeFigure3). NOTE Theresultsofsuchknotbreakingforcetestsarenotcomparablewi

35、ththeresultsofmeshbreakingforcetests,the latteralwaysgivinglowervaluesthanknotbreakingforcetests. 11 Calculationandexpressionofresults TheaveragemeshbreakingforceshallbecalculatedindaNandifnecessary,thecoefficientofvariationandthe confidenceinterval.Discardallobservationsobtainedonsamplesofwhichthel

36、ooseendsofthemeshslipinthe knotsorthejointsdissolve.Thenumberofobservationsdiscardedasdirectedaboveshallbenoted. 12 Testreport Thetestreportshallincludethefollowingparticulars: a) astatementthatthetestswereperformedinaccordancewiththisEuropeanStandard; b) thesamplingmethodemployed; c) adescriptionof

37、thenettingincludingthematerial,thetypeofyarn(twistedorbraided),thetypeofnetting (singleormultipleyarn),themeshsize,thenominallineardensityofthetwine; d) thetypeandcapacityoftestingmachineusedandtherangeofindication; e) thetypeofholdingdeviceforthemeshes:pin,hookorloops; f) thenumberofsampletested(nu

38、mberofmeshesbrokenintheknotsorinthejoints); g) thenumberofthemeshesbrokenoutsidetheknotsorjoints; h) theaveragebreakingforceindaN;thecoefficientofvariationandconfidenceintervalifrequired; i) thewetmeshbreakingforceifrequired; j) anydeviationfromthespecifiedtestprocedure; k) thedateofthetest.ENISO180

39、6:2002(E) 8 Figure1Mountingofameshbypins Figure2MountingofameshbyloopsENISO1806:2002(E) 9 T(ML)direction a)Samplebeforeopeningtheknots b)Sampleafteropeningtheknots Key 1Knottobetested Figure3PreparationofspecimenfordeterminationofknotbreakingforceBS EN ISO 1806:2002 BSI 389 Chiswick High Road London

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