[www.staffempire.com]-BS EN 286-4-1995 Simple unfired pressure vessels designed to contain air or nitrogen Part 4. Aluminium alloy pressure vessels.pdf

CEN ENx28b-4-94 3404.589 0086835 394 BRITISH STANDARD Simple unfired pressure vessels designed to contain air or nitrogen Part 4.Aluminium alloy pressure vessels designed for air braking equipment and auxiliary pneumatic equipment for railway rolling stock The European Standard EN 286-4:1995 has the status of a British Standard UDC 621 642.02-98-034 715 629.4-5yZ 620 1 62-777 BS EN 286-4:1995 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 2864:1995 Standards Board and comes into Amd.NO.Date effect on 15 February 1995 0 BSI 1995 Cooperating organizations Rxt affected The European Committee for Standardization,under whose supervision this European Standard was prepared,comprises the national standards organizations of the following Western European countries:Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standard Suomen Standardisoimisliito,r.y.Association franaise de normalisation Deutsches Institut fr Normung e.V.Hellenic Organization for Standardization Technological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Nonnalisatie-instituut Norges Standardiseringsforbund Instituto Portugus da Qualidade Asociacin Espaola de Normalizacin y Certificacin Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution The following BSI references relate to the work on this standard:Committee reference PVE17 Draft for comment 9081699 DC ISBN O 580 2186 3 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-CEN EN*28b-4 94 W 3404589 O086837 Lb7 m BS EN 286-4:1995 Contents Page Cooperating organizations Inside front cover National foreword i Foreword 2 Text of EN 286-4 3 National annex NA(informative)Committees responsible National annex NB(informative)Cross-references Inside back cover Inside back cover National foreword This British Standard has been prepared under the direction of the Pressure Vessel Standards Policy Committee and is the English language version of EN 286-4:1994 Simple unfired pressure vessels designed to contain air or nitrogen-Part 4:Aluminium alloy pressure vessels designed for air braking equipment and auxiliary pneumatic equipment for railway rolling stock,published by the European Committee for Standardization(CEN).EN 286-4 was produced as a result of international discussions in which the UK took an active part.Compliance with a British Standard does not of itself confer immunity from legal obligations.i Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 286-4 September 1994 UDC 621.642.02-98-034.715:629.4-592 620.1:62-777 Descriptors:Railway rolling stock,brakes,pneumatic equipment,pressure vessels,tanks containers,aluminium alloys,design,computation,production control,weld defects,acceptability,assembling,certification,marking English version Simple unfired pressure vessels designed to contain air or nitrogen-Part 4:Aluminium alloy pressure vessels designed for air braking equipment and auxiliary pneumatic equipment for railway rolling stock Rcipients pression simples,non soumis la flamme,destins contenir de lair ou de lazote-Partie 4:Rcipients pression en alliages daluminium destins aux quipements pneumatiques de freinage et aux quipements pneumatiques auxiliaires du matriel roulant ferroviaire Einfache unbefeuerte Druckbehlter fr Luft oder Stickstoff-Teil 4:Druckbehlter aus Aluminiumlegierungen fr Druckluftbremsanlagen und pneumatische Hilfseinrichtungen in Schienenfahrzeugen This European Standard was approved by CEN on 1994-09-09.CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.Up-to-date lists and bibliographical references concerning such national stan-dards may be obtained on application to the Central Secretariat or to any GEN member.The European Standards exist in three official versions(English,French,German).A version in any other language made by translation under the responsibility of a GEN member into its own language and notified to the Central Secretariat has the same status as the official versions.CEN members are the national standards bodies ofAustria,Belgium,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,Switzerland and United Kingdom.CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat:rue de Stassart 36,B-1050 Brussels 1994 Copyright reserved to CEN members Ref.No.EN 286-4:1994 E Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-w w w.b z f x w.c o mCEN EN*EBb-4 94 3404589 0 0 8 6 8 3 9 T 3 T =Page 2 EN 286-4:1994 Foreword This European Standard was prepared by CEN/TC 54,Unfired pressure vessels,of which the secretariat is held by BSI.This European Standard has been prepared under a Mandate given to CEN by the European Commission and the European Free Trade Association,and supports essential requirements of the EC Directive(s).CEN/TC 54 decided to submit the final draft for formal vote by its resolution.The result was positive.This part is one of a series of four.The other Parts are:Part 1:Design,manufacture and testing Part 2:Pressure vessels for.air braking and auxiliary systems for motor vehicles and their trailers Part 3:Steel pressure vessels designed for air braking equipment and auxiliary pneumatic equipment for railway rolling stock This European Standard shall be given the status of a national standard,either by publication of an identical text or by endorsement,at the latest by March 1995,and conflicting national standards shall be withdrawn at the latest by March 1995.According to the CENKENELEC Internal Regulations,the following countries are bound to implement this European Standard:Austria,Belgium,Denmark,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain and United Kingdom Contents Foreword 1 Scope 2 Normative references 3 Symbols 4 Materials 5 Design Page 2 3 3 4 4 5 6 Inspection and drainage bosses 13 7 Marking 13 8 Corrosion protection 13 9 Qualification of welding procedures 14 10 Qualification of welders and welding operators 14 11 Testing of the vessels 17 12 Certification procedures 24 13 Information to be supplied at the time of invitation to tender and time of order 24 14 Delivery 24 15 Documentation to accompany the vessel 24 Annex A(normative)Verification 25 Annex B(normative)Declaration of conformity-Surveillance 25 Annex C(normative)Design and manufacturing schedules 27 Annex D(normative)Type examination 27 Annex E(normative)Content of the manufactured record 28 Annex F(informative)Assembly of the vehicles 28 Annex G(informative)Service surveillance of vessels 31 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-w w w.b z f x w.c o mCEN EN*Z86-4 74 W 3404589 0086840 751 W 1 Scope 1.1 This Part of this European Standard is applicable to simple unfired aluminium alloy pressure vessels,referred to as vessel in this standard,designed for air braking equipment and auxiliary pneumatic equipment for railway rolling stock(see 1.6).1.2 The vessels to this standard are:a)made from a single shell;b)made from aluminium alloy;c)fabricated by welding;d)used at a maximum working pressure of 10 bar;e)the product of the maximum working pressure(in bar)and the volume(in litre):500 bar litres PV e,+c ecs=K,20f+P The minimum design stress shall be taken from table 1.NOTE.It has been established from the standards quoted in this part that 0,3Rm is always greater than 0,6R,.The values of P and K,to be taken into account are:a)case no.1:P 2 1,15P8 and K,=1 for automatic welding and when tests are carried out in acordance with 1 1.1.2.1;b)case no.2:P 2 1,3Ps and K,=1 for automatic welding and when tests are carried out in accordance with 1 1.1.2.2;c)case no.3:P 2 1,25Ps and K,=1,15 for welding using a non-automatic process and when tests are carried out according to 11.1.1.5.1.4.3 Calculation of the thickness of the ends ech The end thickness shall be calculated in the following manner:a)Select the values off from table 1,and with P=P,calculate Pllof.Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-w w w.b z f x w.c o mCEN ENx28b-4 94 W 3404589 0086844 3T7 Page 7 EN 286-4:1994 R(nominal)=0,0,10,r(nominal)recess welded bosses(see figures lla and 1 lb);b)welded reinforcing plates and recess welded bosses(see figure llc).Adequate reinforcement shall be provided in all planes passing through the axis of the opening.5.2.3.2 Reinforcement of opening Only bosses of the full penetration type as shown in figures lla and llb may be used./A P I I Figure lla.Reinforcement of cylindrical shell with boss Af b+I I 1 Figure llb.Reinforcement of spherical shell with boss Figure llc.Reinforcement of spherical shell by reinforcing plate and boss Figure 11.Reinforcement of opening Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-The length of the boss reinforcement,used in equation(3)for determining Ab shall not be greater than I,see equation(211:The value of erb used for determining Aa in equation(3)shall not be more than twice ers.The following condition shall also be complied with:contributing to the Irh 5 ITS(2)(3)5.2.3.3 Reinforcement by reinforcing plate and boss One of the following two conditions shall be complied with:-the permissible stress f b is less than stress f:Pl10(A,+0,5(Afs+Ab+0,7Af,)_ f(&+0,7Afp)+fh&,-the permissible stress fb is greater than stress f:A,&(Af,+Am+0,7Afp where:a)the areas A,Ab,Af,and Af,are determined as shown in figures lla,llb and llc;b)the maximum height of the boss used in the calculation is:to be Irh=0,8v?(doh-erb)e,h c)the maximum height of the part of the boss(&.hi)inside the vessel,to be used in the calculation is:d)the dimensions of the reinforcing plate to be used in the calculation are:h i =0,5Irb erp I ers and I,5 I,5.2.4 Welding of bosses 5.2.4.1 Inspection openings and pipe connection branches Welds can be either full penetration welds(see figures 12 and 13)or partial penetration welds(see figure 14).5.2.4.2 Drainage openings The welds shall be full penetration welds of the wall of the vessel.Weld preparation of the vessel may be necessary.Examples of permitted welds are given in figures 15,16 and 17.If the drainage opening cannot be made in the bottom of the vessel,drainage shall nevertheless be provided by one of the permitted methods shown in figures 18 to 25.Page 11 EN 286-4:1994 Figure 12.Fixing of a boss by an external I weld I Figure 13.Fixing of a boss by internal and external welds Figure 14.Fixing of a boss by internal and external fillet welds Figure 15.Fixing of a drainage boss by an external weld Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-CEN EN*2b-4 94 3404589 008b49 989 I I/f.L/A I Page 12 EN 286-4:1994 Figure 16.Fixing of a drainage boss by internal and external welds Figure 17.Fixing of a drainage boss with drainage groove Figure 18.Dip tube k e d to an end Figure 19.Dip tube fixed to the shell of a horizontal vessel Figure 20.Dip tube fixed to the shell of a vertical vessel Figure 21.Dip tube fixed to a top end of a vertical vessel Figure 22.Dip tube fixed to the upper part of the shell of a horizontal vessel SW figures x 12,13 and 14 Figure 23.Fixing of a dip tube Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-CEN ENY28b-4 94 3404589 O086850 bTO m dibl d i b i igures and 14 Minimum diameter:30 mm A diameter of 30 mm corresponds approximately to internal threads G1 and M33 Minimum diameter:18 mm A diameter of 18 mm corresponds approximately to internal threads and M20 Figure 24.Fixing of a dip tube to a boss figures 13 and 14 Figure 25.Recessed fixing of a dip tube to a boss 6 Inspection and drainage bosses The vessels shall have at least the inspection and drainage bosses of the dimensions given in table 3 However,vessels with a PV less than or equal to 1000 bar litres(with L 1500)may have only onc boss for pipe connection,inspection and drainage.In this case,the minimum diameter is 30 mm.Other bosses intended particularly for pipe connections may be provided,as long as they are located well away from welded joints or seams subject to deformation,and in particular away from the knuckle ends.Page 13 EN 286-4:1994 The locations of the bosses shown in figure 26 are recommended.Other locations may be specified as long as they permit access for internal inspection and drainage of the vessel.7 Marking 7.1 General Vessels complying with this Part of this European Standard shall bear the identification and service marks given in 7.4.These marks are stamped either in the metal of the vessel itself or on a plate welded to the vessel wall.These marks shall be located on the vessel at one of the positions shown in figure 27.7.2 Marking stamped in the metal of the vessel Stamping of marks shall only be carried out on vessel walls of thickness e 2 5 mm.The stamps shall not have any sharp edges and the depth of the stamping shall not exceed one tenth of the wall thickness.When the marking is on an end,the mark shall be stamped as far as possible away from the theoretical line of intersection of the knuckle radius and the spherical radius and shall be close to the end base,without interfering with the weld of the pipe connection branch.Marking shall be carried out before the ends are welded onto the shell.The only marks that shall be stamped onto the finished vessel are those given in items 6)and 10)of 7.4.7.3 Marking stamped on a plate The dimensions of the marking plate are given in figure 28.7.4 Identity and service marks This marking shall follow the general arrangement shown