1、BRITISH STANDARD AEROSPACE SERIES BS EN 3748:2001 O-ring Grooves Dimensions The European Standard EN 3748:2001 has the status of a British Standard ICS 49.030.99 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 3748:2001 This British Standard, having been prepared under th
2、e direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 14 December 2001 BSI 14 December 2001 ISBN 0 580 38773 9 National foreword This British Standard is the official English language version of EN 374
3、8:2001. The UK participation in its preparation was entrusted to Technical Committee ACE/12/1, Aerospace Fasteners, Fastening Systems, Details and Parts (International), which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary
4、. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Ele
5、ctronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their 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 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 comprises a front cove
7、r, an inside front cover, the EN title page, pages 2 to 29 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 EN3748 November2001 ICS
8、49.080 Englishversion AerospaceseriesOringgroovesDimensions SriearospatialeGorgespourjointstoriques Dimensions LuftundRaumfahrtNutenfrORingeMae ThisEuropeanStandardwasapprovedbyCENon11August2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisE
9、urope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlang
10、uagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlan
11、ds,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2001CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No
12、.EN3748:2001EEN3748:2001(E) 2 Foreword ThisEuropeanStandardhasbeenpreparedbytheEuropeanAssociationofAerospaceManufacturers (AECMA). AfterinquiriesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhas receivedtheapprovaloftheNationalAssociationsandtheOfficialServicesofthememberc
13、ountriesof AECMA,priortoitspresentationtoCEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyMay2002,andconflictingnationalstandardsshallbewithdrawnat thelatestbyMay2002. AccordingtotheCEN/CENELECInternalRegulations,then
14、ationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal, Spain,Sweden,SwitzerlandandtheUnitedKingdom. Contents Page 1 Scope3 2 Normat
15、ivereferences .3 3 Symbols .3 4 Requiredcharacteristics 3 4.1 ConfigurationDimensionsTolerances.3 4.1.1 RadialsealingRodhousing:ConfigurationcodeA .4 4.1.2 RadialsealingBorehousing:ConfigurationcodeB 10 4.1.3 Axialsealingforinternalpressure:ConfigurationcodeC.16 4.1.4 Axialsealingforexternalpressure
16、:ConfigurationcodeD22 5 Designation28 6 Drawingpresentation .28 6.1 ConfigurationcodeA28 6.2 ConfigurationcodeB28 6.3 ConfigurationcodeC29 6.4 ConfigurationcodeD29EN3748:2001(E) 3 1Scope ThisstandardspecifiesthedimensionsofgroovesforusewithoringsaccordingtoENstandardsfor aerospaceapplications: radia
17、lsealing:rodorboremountedorings; axialsealing:internalorexternalpressuresource. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelisted hereafter.Fordate
18、dreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapply tothisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferences, thelatesteditionofthepublicationreferredtoapplies(includingamendments). ISO 2862 ISOsystemoflimitsandfitsPart 2:Tablesofstandardtoleran
19、cegradesandlimit deviationsforholesandshafts EN3049 AerospaceseriesOrings,influorocarbonrubber(FKM),lowcompressionsetHardness 80IRHD EN3746 AerospaceseriesOrings,influorosiliconerubber(FVMQ)Hardness80IRHD 1) TR 4271 AerospaceseriesOringsgroovesDesigncriteriafororinggroovesBasic calculations 2) 3Symb
20、ols b : oringgroovewidth d 1 : oringinsidediameter d 2 : oringsectiondiameter d 3 : oringgroovediameter,rodmounted d 4 : borediameter,rodmounted d 5 : rodoutsidediameter,boremounted d 6 : oringgroovediameter,boremounted d 7 : oringgrooveoutsidediameter,internalpressure d 8 : oringgrooveinsidediamete
21、r,externalpressure d 9 : rodoutsidediameter,rodmounted d 10 : borediameter,boremounted h : grooveheight R : edgeradiusongroove r 1 : cornerradiusongroove t : housingdepth Z : leadinchamferlength 4 Requiredcharacteristics 4.1 ConfigurationDimensionsTolerances Onlyrecommendedsizesaregiveninthetables.T
22、heyareapplicabletoEN3049andEN3746.Forother grooveororing,refertoTR4271. Dimensionsandtolerancesareinmillimetres.Surfaceroughnessvaluesareinmicrometres. 1) PublishedasAECMAPrestandardatthedateofpublicationofthisstandard 2) PublishedasAECMATechnicalReportatthedateofpublicationofthisstandardEN3748:2001
23、(E) 4 4.1.1 RadialsealingRodhousing:ConfigurationcodeA Thisconfigurationcorrespondstoradialgroovesinstaticapplications,rodmounted.Seefigure 1and tables1to7. Key 1 0to5 2B o r e 3R o d 4 Noburrspermittedinthisarea a Seetable1. b Groovediameter d3 50:maximumrunouttolerance Y=0,025 Groovediameter d3 50
24、:maximumrunouttolerance Y=0,05 Figure1 Table1 Roughness R a R max. continuous pressure withpressure variation continuous pressure withpressure variation Surface 5MPa 5MPa 5MPa 5MPa 5MPa 5MPa 5MPa 5MPa Side surfaces 3,2 12,5 Groove Inside diameter 1,6 6,3 Homologous surface 1,6 1,6 1,6 0,8 6,3 6,3 6,
25、3 3,2EN3748:2001(E) 5 Table2 d 2 bZr 1 R n o m .m a x .m i n .m i n .m a x .m i n .m a x .m i n . 1,80 2,65 2,40 1,1 2,65 3,85 3,60 1,5 0,4 0,2 3,55 5,05 4,80 1,8 5,30 7,35 7,10 2,7 0,8 0,4 7,00 9,45 9,20 3,6 1,2 0,8 0,3 0,1 4.1.1.1 Sectiondiameter d 2 =1,80 Table3 d 3 d 4 d 1 d 9 Code a nom. 0 0,04
26、 0,06 0 f7 b A0040 4,00 4,24 7,00 7,00 A0050 5,00 5,27 8,03 8,03 A0060 6,00 6,30 9,06 9,06 A0069 6,90 7,24 10,00 10,00 A0087 8,75 9,12 11,88 11,88 A0106 10,60 11,02 13,78 13,78 A0125 12,50 12,97 15,73 15,73 A0140 14,00 14,54 17,30 17,30 A0160 16,00 16,64 19,40 19,40 A0180 18,00 18,64 21,40 21,40 A02
27、12 21,20 21,94 24,70 24,70 A0236 23,60 24,44 27,20 27,20 A0280 28,00 28,94 31,70 31,70 A0315 31,50 32,54 35,30 35,30 A0355 35,50 36,64 39,40 39,40 A0365 36,50 37,64 40,40 40,40 A0375 37,50 38,64 41,40 41,40 A0387 38,70 39,84 42,60 42,60 A0400 40,00 41,24 44,00 44,00 a Sizecodecorrespondingtothecodif
28、icationoforings,according toaerospaceseriesENstandards. b SeeISO2862.EN3748:2001(E) 6 4.1.1.2 Sectiondiameter d 2 =2,65 Table4 d 3 d 4 d 1 d 9 Code a nom. 0 0,05 0,07 0 f7 b B0053 5,30 5,58 9,72 9,72 B0069 6,90 7,25 11,39 11,39 B0095 9,50 9,90 14,04 14,04 B0112 11,20 11,66 15,80 15,80 B0132 13,20 13
29、,76 17,90 17,90 B0150 15,00 15,56 19,70 19,70 B0170 17,00 17,66 21,80 21,80 B0200 20,00 20,66 24,80 24,80 B0224 22,40 23,16 27,30 27,30 B0265 26,50 27,36 31,50 31,50 B0300 30,00 30,96 35,10 35,10 B0345 34,50 35,56 39,70 39,70 B0387 38,70 39,86 44,00 44,00 B0437 43,70 45,06 49,20 49,20 B0500 50,00 51
30、,46 55,60 55,60 B0560 56,00 57,66 61,80 61,80 B0600 60,00 61,76 65,90 65,90 B0650 65,00 66,86 71,00 71,00 B0710 71,00 73,06 77,20 77,20 B0750 75,00 77,16 81,30 81,30 B0800 80,00 82,26 86,40 86,40 a Sizecodecorrespondingtothecodificationoforings,according toaerospaceseriesENstandards. b SeeISO2862.EN
31、3748:2001(E) 7 4.1.1.3 Sectiondiameter d 2 =3,55 Table5 d 3 d 4 d 1 d 9 Code a nom. 0 0,06 0,08 0 f7 b C0250 25,00 25,82 31,30 31,30 C0300 30,00 31,02 36,50 36,50 C0355 35,50 36,62 42,10 42,10 C0425 42,50 43,82 49,30 49,30 C0487 48,70 50,12 55,60 55,60 C0545 54,50 56,12 61,60 61,60 C0615 61,50 63,32
32、 68,80 68,80 C0710 71,00 73,02 78,50 78,50 C0800 80,00 82,32 87,80 87,80 C0900 90,00 92,52 98,00 98,00 C1000 100,00 102,82 108,30 108,30 C1120 112,00 115,12 120,60 120,60 C1150 115,00 118,22 123,70 123,70 C1220 122,00 125,32 130,80 130,80 C1320 132,00 135,62 141,10 141,10 C1400 140,00 143,82 149,30
33、149,30 C1500 150,00 154,12 159,60 159,60 C1600 160,00 164,32 169,80 169,80 C1700 170,00 174,62 180,10 180,10 C1800 180,00 189,92 195,40 195,40 C1900 190,00 195,12 200,60 200,60 C2000 200,00 205,32 210,80 210,80 C2120 212,00 217,62 223,10 223,10 C2240 224,00 229,92 235,40 235,40 C2360 236,00 242,32 2
34、47,80 247,80 C2500 250,00 256,62 262,10 262,10 a Sizecodecorrespondingtothecodificationoforings,according toaerospaceseriesENstandards. b SeeISO2862.EN3748:2001(E) 8 4.1.1.4 Sectiondiameter d 2 =5,30 Table6 d 3 d 4 d 1 d 9 Code a nom. 0 0,07 0,09 0 f7 b D0600 60,00 61,82 70,20 70,20 D0710 71,00 73,0
35、2 81,40 81,40 D0800 80,00 82,32 90,70 90,70 D0900 90,00 92,52 100,90 100,90 D1090 109,00 112,02 120,40 120,40 D1120 112,00 115,12 123,50 123,50 D1180 118,00 121,22 129,60 129,60 D1280 128,00 131,52 139,90 139,90 D1360 136,00 139,72 148,10 148,10 D1450 145,00 148,92 157,30 157,30 D1550 155,00 159,22
36、167,60 167,60 D1650 165,00 169,42 177,80 177,80 D1750 175,00 179,72 188,10 188,10 D1850 185,00 190,02 198,40 198,40 D1950 195,00 200,22 208,60 208,60 D2000 200,00 205,32 213,70 213,70 a Sizecodecorrespondingtothecodificationoforings,according toaerospaceseriesENstandards. b SeeISO2862.EN3748:2001(E)
37、 9 4.1.1.5 Sectiondiameter d 2 =7,00 Table7 d 3 d 4 d 1 d 9 Code a nom. 0 0,09 0,11 0 f7 b E1090 109,00 112,06 123,40 123,40 E1150 115,00 118,26 129,60 129,60 E1250 125,00 128,46 139,80 139,80 E1360 136,00 139,76 151,10 151,10 E1450 145,00 148,96 160,30 160,30 E1550 155,00 159,26 170,60 170,60 E1650
38、 165,00 169,46 180,80 180,80 E1750 175,00 179,76 191,10 191,10 E1850 185,00 189,96 201,30 201,30 E1900 190,00 195,16 206,50 206,50 E2000 200,00 205,36 216,70 216,70 E2120 212,00 217,66 229,00 229,00 E2240 224,00 229,86 241,20 241,20 E2300 230,00 236,16 247,50 247,50 E2430 243,00 249,46 260,80 260,80
39、 E2500 250,00 256,66 268,00 268,00 E2580 258,00 264,86 276,20 276,20 E2720 272,00 279,26 290,60 290,60 E2800 280,00 287,46 298,80 298,80 E2900 290,00 297,66 309,00 309,00 E3000 300,00 307,96 319,30 319,30 E3150 315,00 323,36 334,70 334,70 E3250 325,00 333,56 344,90 344,90 E3350 335,00 343,86 355,20
40、355,20 E3450 345,00 354,06 365,40 365,40 E3550 355,00 364,36 375,70 375,70 E3650 365,00 374,56 385,90 385,90 E3750 375,00 384,86 396,20 396,20 E3870 387,00 397,16 408,50 408,50 E4000 400,00 410,46 421,80 421,80 a Sizecodecorrespondingtothecodificationoforings,according toaerospaceseriesENstandards.
41、b SeeISO2862.EN3748:2001(E) 10 4.1.2 RadialsealingBorehousing:ConfigurationcodeB Thisconfiguration(notrecommanded)correspondstoradialgroovesinstaticapplications,boremounted. Seefigure2andtables8to14. Key 1 0to5 2R o d 3B o r e 4 Noburrspermittedinthisarea a Seetable8. b Groovediameter d6 50:maximumr
42、unouttolerance Y=0,025 Groovediameter d6 50:maximumrunouttolerance Y=0,05 Figure2 Table8 Roughness R a R max. continuous pressure withpressure variation continuous pressure withpressure variation Surface 5MPa 5MPa 5MPa 5MPa 5MPa 5MPa 5MPa 5MPa Side surfaces 3,2 12,5 Groove Inside diameter 1,6 6,3 Ho
43、mologous surface 1,6 1,6 1,6 0,8 6,3 6,3 6,3 3,2EN3748:2001(E) 11 Table9 d 2 bZr 1 R n o m .m a x .m i n .m i n .m a x .m i n .m a x .m i n . 1,80 2,65 2,40 1,1 2,65 3,85 3,60 1,5 0,4 0,2 3,55 5,05 4,80 1,8 5,30 7,35 7,10 2,7 0,8 0,4 7,00 9,45 9,20 3,6 1,2 0,8 0,3 0,1 4.1.2.1 Sectiondiameter d 2 =1,
44、80 Table10 d 5 d 6 d 1 d 10 Code a nom. 0 0,04 0,06 0 H8 b A0040 4,00 4,29 7,13 4,37 A0048 4,87 5,15 7,99 5,23 A0056 5,60 5,84 8,68 5,92 A0067 6,70 6,86 9,70 6,94 A0080 8,00 8,16 11,00 8,24 A0087 8,75 8,86 11,70 8,94 A0100 10,00 10,06 12,90 10,14 A0118 11,80 11,86 14,70 11,94 A0140 14,00 13,96 16,80
45、 14,04 A0160 16,00 15,96 18,80 16,04 A0180 18,00 17,86 20,70 17,94 A0200 20,00 19,86 22,70 19,94 A0224 22,40 22,16 25,00 22,24 A0250 25,00 24,66 27,50 24,74 A0280 28,00 27,66 30,50 27,74 A0325 32,50 32,06 34,90 32,14 A0365 36,50 36,06 38,90 36,14 A0400 40,00 39,36 42,20 39,44 a Sizecodecorresponding
46、tothecodificationoforings,according toaerospaceseriesENstandards. b SeeISO2862.EN3748:2001(E) 12 4.1.2.2 Sectiondiameter d 2 =2,65 Table11 d 5 d 6 d 1 d 10 Code a nom. 0 0,05 0,07 0 H8 b B0045 4,50 5,07 9,37 5,23 B0060 6,00 6,48 10,78 6,64 B0069 6,90 7,33 11,63 7,49 B0080 8,00 8,42 12,72 8,58 B0090 9,00 9,42 13,72 9,58 B0100 10,00 10,32 14,62 10,48 B0118 11,80 12,1
