1、BRITISH STANDARD BS EN 13938-6:2004 Explosives for civil uses Propellants and rocket propellants Part 6: Solid rocket propellants Guide for the determination of integrity of inhibitor coatings The European Standard EN 13938-6:2004 has the status of a British Standard ICS 71.100.30 BS EN 13938-6:2004
2、 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 14 May 2004 BSI 14 May 2004 ISBN 0 580 43776 0 National foreword This British Standard is the official English language version of EN 13938-6:2004. The UK participation in its preparation was e
3、ntrusted to Technical Committee CII/61, Explosives for civil uses, 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 referre
4、d 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 Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisio
5、ns 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 understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for
6、 change, and 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 7 and a back cover. The BSI copyright notice displayed in t
7、his document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN139386 May2004 ICS71.100.30 Englishversion ExplosivesforcivilusesPropellantsandrocketpropellants Part6:SolidrocketpropellantsGuideforth
8、edeterminationof integrityofinhibitorcoatings ExplosifsusagecivilPropergoletblocsdepropergol pourfusePartie6:BlocdepropergolpourfuseGuide dedterminationdelintgritdesrevtementsinhibiteurs ExplosivstoffefrzivileZweckeTreibladungspulverund RaketentreibstoffeTeil6:FesteRaketentreibstoffe LeitfadenzurBes
9、timmungderIntegrittvon Inhibitorbeschichtungen ThisEuropeanStandardwasapprovedbyCENon6February2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographica
10、lreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCen
11、tralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,
12、Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN139386:2004:EEN1
13、39386:2004(E) 2 Contents Page Foreword. 3 Introduction 4 1 Scope . 5 2 Normativereferences . 5 3 Termsanddefinitions. 5 4 NDTmethods. 6 5 Testreport . 6EN139386:2004(E) 3 Foreword Thisdocument(EN139386:2004)hasbeenpreparedbyCEN /TC 321,“Explosivesforciviluses“,the secretariatofwhichisheldbyAENOR. Th
14、isEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyNovember2004,andconflictingnationalstandardsshallbewithdrawn atthelatestbyNovember2004. ThisEuropeanStandardisoneofaseriesofstandardswiththegenerictitle Explosivesforciviluses
15、 Propellantsandrocketpropellants. Theotherpartsofthisseriesarelistedbelow: prEN139381 Part1:Requirements. prEN139382 Part2:Determinationofresistancetoelectrostaticenergy. EN139383 Part3:Determinationofdeflagrationtodetonationtransition. EN139384 Part4:Determinationofburningrateunderambientconditions
16、. prEN139385 Part5:Solidrocketpropellants.Determinationofvoidsandfissures. prEN139387 Part7:Determinationofpropertiesofblackpowder. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Cyprus,Cze
17、chRepublic, Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania, Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,Slovakia,Slovenia,Spain,Sweden,Switzerland andUnitedKingdom.EN139386:2004(E) 4 Introduction Incompleteadhesionof,orflawsin,theinhibitorcoating
18、tosolidrocketpropellantgrainsandthecasingcan resultindangerouslyhighpressuresinrocketmotorsandadverselyaffecttheirsafetyandperformance.The category“Solidrocketpropellants”encompasseschargesoverawiderangeofcompositionanddimensions. Itisnotpossibletodefineanacceptablelevelofdefects(lack,crackorblister
19、)intheinhibitorcoatingwhichis applicabletothewholerangeofproducts.Itisnecessaryforthistobeagreedbetweentheproducerandthe customer.ConsequentlyaHarmonisedStandardcannotbedefinedwithcriteriaforacceptancelevelsof integrityofinhibitorcoating.Howeveritisimportantthatinterestedpartiesareawareofthemethodsw
20、hich canbeusedtoassesstheextentofintegrityofinhibitorcoatinginanyparticularproduct.Thisstandard describesanumberofmethodswhichhavebeenused.Amethodcanbeselectedwhichismostappropriate tothechargeunderexamination .EN139386:2004(E) 5 1Scope ThisEuropeanStandardprovidesaguidetonondestructivetesting(NDT)m
21、ethodsfordetectingtheintegrity ofinhibitorcoatingsinsolidrocketpropellants. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelisted hereafter.Fordatedr
22、eferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies(includingamendments). EN138571:2003, ExplosivesforcivilusesPart1:Terminology ENISO/IEC17
23、025, Generalrequirementsforthecompetenceoftestingandcalibrationlaboratories(ISO/IEC 17025:1999) 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN138571:2003andthe followingapply. 3.1 NDTmethod disciplineapplyingaphysicalprincipleinnondestructivetesting NOTE:A
24、nexampleofanNDTmethodisultrasonictesting. 3.2 NDTtechnique specificwayofutilisinganNDTmethod NOTE:AnexampleofanNDTtechniqueisimmersionultrasonictesting. 3.3 NDTprocedure orderlysequenceofrules,whichdescribesstepbystephowandinwhichsequenceanNDTtechniqueshould beappliedtoaspecificfield 3.4 lackofcoati
25、ng absenceofinhibitorcoatinginalimitedareaonthesurfaceofthepropellant,whichnormallyshouldbe coated,orevidentreductionofcoatingthicknessonsuchasurface 3.5 crackincoating discontinuityincoatingwhichdoesnotexposethepropellant 3.6 blisterincoating Inclusionofgasundertheexternalsurfaceofinhibitorcoatingt
26、hatcancauseahumpEN139386:2004(E) 6 3.7 integrityofinhibitorcoating presenceorabsenceofspecifieddefectsintheinhibitorcoating 3.8 solidrocketpropellant propellantconsistingofoneormoreblocks,usuallywithacentralhole,withanexternalinhibitorinorderto burninacontrolledmanner 3.9 debonding lackofadhesioncau
27、singseparationofcoatingandpropellant 4NDT methods TheintegrityofaninhibitorcoatingofasolidrocketpropellantcanbeassessedbyvariousNDTmethods normallyusedforthetestingofmetalandwelds.TheNDTmethodandtechniqueselecteddependonmany factors.Amongthemitmaybeusefultodistinguish: minimumareaofuncoatedpropellan
28、torminimumsizeofcrackorblisterinthecoatingtobe detected; typeofpropellanttobeinspected; typeofinspection(continuousproductionlineinspectionortheindividualinspectionofsamples); numberofunitstobeinspected. ThemainNDTmethodsusedareshowninTable1. 5 Testreport ThetestreportshallconformtoENISO/IEC17025.In
29、addition,thefollowinginformationshallbegiven: a) referencetothisstandard; b) identificationoftheproducttested; c) referencetotheagreedacceptancecriteriafortheproducttested; d) referencetotheNDTprocedureused; e) identificationoftheNDTrecord(s); f) resultsoftheNDTtests.EN139386:2004(E) 7 Table1NDTmeth
30、ods NDTmethod Detectionof Comments Filmradiography (Xrayorisotopes) blister debonding inclusionofsometypesofforeign bodies Suitableforalltypesof propellantunit Detectionofpossibledefects involvesalotofpicturesto coverallappropriateanglesof incidence Personnelprotectionrequired Xrayradioscopy blister
31、 debonding inclusionofsometypesofforeign bodies Suitableforalltypesof propellantsunits Nofilmsinvolved Personnelprotectionrequired Xraytomography blister debonding inclusionofsometypesofforeign bodies Suitableforalltypesof propellantunits MoreexpensivethanXray radioscopy Personnelprotectionrequired
32、Ultrasonic blister debonding Aliquidorgelisrequiredfor soundtransmission Maybeadaptedforinline inspection Nopersonnelprotection required Infraredthermography debonding Suitableonlyforpropellant unitswithoutmetalliccase Easytouse Nopersonnelprotection required Visualtesting lackofcoating crackincoati
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