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 It supersedes BS 4650:1970 which is withdrawn.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
40、 W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revi
41、sion. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform t
42、he Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest edition
43、s of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi-. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of inf
