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1、INTERNATIONALIS0STANDARD9303Firstedition1989-07-15Seamlessandwelded(exceptsubmergedarc-welded)steeltubesforpressurepurposes-FullperipheralultrasonictestingforthedetectionoflongitudinalimperfectionsTubesenaciersanssoudureetsoudtk(saufiil’arcimmerghlpourservicesous

2、pression-Contr6leparultrasonssurtoutelacirconfkrencepourladhtectiondesimperfectionslongitudinalesReferencenumberIS09303:1989(E)IS09303:1989(E)ForewordIS0(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(IS0memberbodie

3、s).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughIS0technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,govern-mentalandnon-go

4、vernmental,inliaisonwithISO,alsotakepartinthework.IS0collaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforapp

5、rovalbeforetheiracceptanceasInternationalStandardsbytheIS0Council.TheyareapprovedinaccordancewithIS0proceduresrequiringatleast75%approvalbythememberbodiesvoting.InternationalStandardIS09303waspreparedbyTechnicalCommitteeISO/TC17,Steel.AnnexAformsanintegralpartoft

6、hisInternationalStandard.0IS01969Allrightsreserved.Nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromthepublisher.InternationalOrganizationforStandardizatio

7、nCasepostale56.CH-1211Geneve20.SwitzerlandPrintedinSwitzerlandii标准分享网www.bzfxw.com免费下载IS09303:1999(ElIntroductionThisInternationalStandardconcernsfullperipheralultrasonictestingofseamlessandwelded(exceptsubmergedarc-welded)tubesforpressurepurposesforthedetectiono

8、flongitudinalimperfections.Fourdifferentacceptancelevelsareconsidered(seetable1).ThechoicebetweentheseacceptancelevelsiswithintheprovinceoftheIS0TechnicalCommi