simple unfired pressurecngspw.com/doc/webnote/201108/y2011m08d01h14m32s40/bs20... · 2011. 8....

CEN EN*286-3 9 4 3404589 0087557 L T T M

BRITISH STANDARD

Simple unfired pressure

BS EN

vessels designed to contain air or nitrogen Part 3. Steel pressure vessels designed for air braking equipment and auxiliary pneumatic equipment for railway rolling stock

The European Standard EN 286-3 : 1994 has the status of a British Standard

UDC 621.642.02-98 : 629.8 : 620.1

286-3 : 1995

Copyright European Committee for Standardization Provided by IHS under license with CEN

Not for ResaleNo reproduction or networking permitted without license from IHS

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CEN EN828b-3 7 4 3404587 0087558 O36 BS EN 286-3 : 1995

Standards Board and comes into effect on 15 February 1995

0 BSI 1995

Amd. No.

Cooperating organizations

Date Text 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

Oestemeichisches Normungsinstitut Institut belge de normalisation Dansk Standard Suomen Standardisoimisliito, r.y. Association française de normalisation Deutsches Institut für 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 Normalisatie-institut Norges Standardiseringsforbund Instituto Portuguès da Qualidade Asociación Española de Normalización y Certificación Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution

The following BSI references relate to the work on this standard: Committee reference PVE/17 Draft for comment 89/79813 DC

ISBN O 580 21841 4



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CEN EN*i<28b-3 7 4 3404587 0087557 T72 m BS EN 286-3 : 1995

Contents

Cooperating organizations National foreword

page Inside front cover

i Fore word 2 Text of EN 286-3 : 1994 3 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back cover

National foreword

This British Standard has been prepared under the direction of the Pressure Vessel Standards Policy Committee and is the Enghsh language version of EN 286-3 : 1994 Simple unfired pressure vessels designed to contain air or nitrogen - Part 3 : Steel pressure vessels designed for air braking equipment and auxiliary p w m t i c equipment for railway rolling stock, published by the European Committee for Standardization (CEN). It supersedes BS 3256 : 1960 which is withdrawn. EN 286-3 was produced as a result of international discussions in which the United Kingdom 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 CEN


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CEN EN*2ôb-3 74 3 4 0 4 5 8 7 00875b0 7 9 4 M

EN 286-3 EUROPEAN STANDARD NORME EUROPÉENNE

EUROPÄISCHE NORM September 1994

UDC 621.642.02-98 : 629.8 : 620.1

Descriptors: Railway rolling stock, pneumatic equipment, pneumatic brakes, pressure vessels, unalloyed steels, grades : quality, welded joints, computation, design, production control, tests, assembling, certification

English version

Simple unfired pressure vessels designed to contain air or nitrogen - Part 3 : Steel pressure vessels designed for air braking equipment and auxiliary pneumatic equipment for

railway rolling stock

Récipients à pression simple, non soumis à la flamme, destinés à contenir de l’air ou de l’azote - Partie 3: Récipients à pression en acier destinés aux équipements pneumatiques de freinage et aux équipements pneumatiques auxiliaires du matériel roulant ferroviaire

Einfache unbefeuerte Druckbehälter für Luft oder Stickstoff - %il 3: Druckbehälter aus Stahl für 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 standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three officiai versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN 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 of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

CEN European Committee for Standardization

Comité Européen de Normalisation Europäisches Komitee für Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

0 1994 Copyright reserved to CEN members Ref. No. EN 286-3 : 1994 E



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CEN EN*286-3 94 3404589 0087561 620 Page 2 EN 2%3 : 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 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 F?arts are:

Part 1: Design, manufacture and testiw Part 2: Pressure vessels for air braking and auxiliary systems for motor vehicles and tbir trailers Part 4: Aluminium alloy 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 foilowing 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 2 3 4 5 6 7 8 9

10

11 12 13

14 15

Scope Normative references Symbols Materials Design Inspection and drainage bosses Marking Corrosion protection Qualification of welding procedures Qualification of welders and welding operators %sting of the vessels Certification procedures Information to be supplied at the time of invitation to tender and the time of order Delivery Documentation to accompany the vessel

Annex A (normative) Verification Annex B (normative) Declaration of conformity - Surveillance Annex C (normative) Design and manufacturing schedules Annex D (normative) Type examination Annex E (normative) Content of the manufacturing record Annex F (informative) Assembly to the vehicles Annex G (informative) Service surveillance of type A vessels Annex H (informative) Service surveillance of type B and C vessels

Page 2 3 4 5 6 7

21 22 22 22

22 25 30

31 31

31 32

32

34 34

35

36

38

41



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CEN ENM28b-3 94 = 3404589 0087562 567

Full penetration weld of the vessel wall for penetrating boss

Full penetration weld of the vessel wail for penetrating boss. Convex weld for surface mounted boss

Fixing by steel straps Fixing by straps or welded brackets

Page 3 EN 286-3 : 1994

1 Scope 1.1 This Part of this European Standard is applicable to simple unfired steel 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). It defines three types of vessel A, B and C (see table 1) corresponding to the current practice of European railway networks. 1.2 The vessels to this standard are:

therefore does not apply to vessels with one or two flat ends or those made up of several compartments; g) calculated with a design pressure P (see 5.1.4.1.2); h) designed for a working temperature of between -40 O C and + 100 O C ;

i) fastened to the vehicles: 1) by straps for types A and B vessels; 2) by welded brackets for types B and C vessels.

1.3 In normal service, a momentary overpressure of 1 bar of the maximum working pressure is permitted (10 % of Ps).

1.4 This Part of this European Standard applies to the vessel proper, from the inlet connection to the outlet connection and to all other connections and fittings belonging to the vessel.

1.5 This Part of this European Standard gives the requirements to be met for the calculation, design, fabrication, inspection during fabrication and certification of the and fittings for assembly to the vehicle.

a) made from a single shell; b) made from non-alloy steel; c) fabricated by welding; d) used at a maximum working pressure of 10 bar; e) the (in bar) and the volume (in litre): 50 bar litres c PV I 10 O00 bar litres; f) made of a cylindrical part of circular cross-section called the shell with two outwardly dished torispherical ends, that is two dished ends with the same axis of rotation. This standard

Of the maximum working

Table 1. Definitions of types of vessel Criterion Type A Type B Reference

clause in this standard

5.1.4.1 Nominal design stress f

5.1.4.2

Radii of curvature of the end

R = Do = O,lD, I R = Do

Y = O,lD,-, 5.1.3.1.1

R = Do Y 2 0,06D,

5.1.3.1.2

5.1.5.2.1

5.1.5.2.2

Shell rindend assembly

Butt weld or swaged end. Full penetration weld

Butt weld or swaged end. Full penetration weld

I Inserted end Thread of inspection, branch and drainage boss

IS0 228-1 IS0 261

IS0 7-1 IS0 228-1 IS0 261

5.2.1 IS0 7-1 IS0 228-1 IS0 261

Weld of drainage boss ~

5.2.4.2

Annex F

Full penetration weld of the vessel wall for penetrating boss. Convex weld for surface mounted boss Fixing by welded brackets

Method of fixing to the vehicle Service surveiiìance Annex G I Annex H Annex H



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CEN ENx28b-3 7 4 3 4 0 4 5 8 7 0 0 8 7 5 6 3 4T3 D

Page 4 EN 286-3 : 1994

These requirements cannot be written in sufficient detail to ensure good workmanship or proper construction. Each manufacturer is therefore responsible for taking every necessary step to make sure that the quality of workmanship and construction is such as to ensure compliance with good engineering practice. This Part of this standard gives:

a) in annex F, recommendations for assembly to the vehicles; b) in annex G, recommendations for the service surveillance of type A vessels; c) in annex H, recommendations for the service surveillance of types B and C vessels.

1.6 The requirements of this Part of this European Standard apply to vessels designed to be fitted to rail vehicles used on the main national networks, urban networks, underground railways, trams, private networks (regional railways, company railways, . . .).

2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.

EN 10025

EN 10045-1

EN 10207

EN 26520

IS0 7-1

IS0 228-1

IS0 261

IS0 1101

IS0 1106-1

EN 287-1

EN 288-1

EN 288-2

EN 288-3

Approval testing of welders - fusion welding -

SpecijVcation and approval of welding procedures for metallic materials - Part 1 : General rules for fusion welding Specification and approval of welding procedures for metallic materials - Part 2 : Welding procedure specification for arc welding Specifkation and approval of welding procedures f o r metallic materials - Part 3 : Welding procedure tests for the arc welding of steels

Part 1 : Steels IS0 1106-3

IS0 5173

Hot rolled products of non-alloy structural steels - Technical delivery conditions Metallic materials - Charpy impact test Part 1 : Test method Steels for simple pressure vessels - Technical delivery requirmmts for plates, strips and bars Classification of imperfections in metallic fusion welds, with explanations Pipe threads where pressure-tight joints are made on the threads - Part 1 : Designation, dimensions and tolerances Pipe threads where pressure-tight joints are not ma& on the threads - Part 1 : Designation, dimensions and tolerances IS0 general purpose metric screw threads - General plan Technical drawings - Geometrical tolerancing - lblerancing of forrn, orientation, location and run-out - Generalities, definitions, symbols, indications on drawings Recommended practice for radiographic examination of fusion welded joints - Part 1 : Fusion welded butt joints in steel plates u p to 50 mm thick Recommended practice f i radiographic emmination of f w i o n welded joints - Part 3 : Fusion welded circumferential joints in steel pipes of u p to 50 mm wall thickness Fusion welded butt joints in steel - í'?ransvt?rse root and face bend test



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CEN ENx2ôb-3 74 3404589 0087564 33T

3 Symbols For the purpose of this standard, the following symbols apply:

A

Afb

AfP

Afs

AP C

DO

dib

dob e e, ech

ecs

eh

erb

eV

ers

f

f b

9 h

hl

h2

Elongation at rupture Cross sectional area effective as compensation of the boss Cross sectional area effective as compensation of the reinforcing plate Cross sectional area effective as compensation of the shell Area of the pressurized zone Absolute value of the minus rolling tolerance for sheets as quoted in the standard Outside diameter of the shell of the vessel Internal diameter of the boss Outside diameter of the boss Nominal wall thickness Calculated thickness Calculated thickness of the end Calculated thickness of the shell Nominal thickness of the end Wall thickness of the boss contributing to reinforcement Wall thickness of the reinforcing plate contributing to reinforcement Wall thickness of the shell Contributing to reinforcement Nominal design stress at the design temperature Permitted stress of the boss Throat thickness of a weld External height of the dished part of an end (see figure 4) External height of the cylindrical part of the end (see figure 4) Internal height of a dished part of the end (see figure 4)

%

mm2

mm2

mm2

mm2 mm

mm

mm mm mm mm mm mm mm mm

mm

mm

N/mm2

N/mm2 mm mm

mm

mm

Page 5 EN 286-3 : 1994

Design coefficient which is a function of the welding process Impact energy at break (V-notch test piece) Total length of the vessel Distance between the axis of a drainage opening and the end of the vessel Length of the boss contributing to reinforcement Length of inward projecting boss contributing to reinforcement Length of the reinforcing plate contributing to reinforcement] measured along the mid-surface Length of the shell contributing to reinforcement] measured along the mid-surface Design pressure') which is a function of the maximum working pressure, the welding process and inspection used Maximum working pressure1) Internal radius of the spherical part of the end Minimum yield point at the maximum working temperature Local internal radius at the location of the opening in question Minimum tensile strength specified by the manufacturer or by the standard defining the steel Internal radius of the torispherical part of the end Corrosion allowance Minimum working temperature Maximum working temperature Temperature at which the mean value of the energy absorbed at break (V-notch), KV 2 28 J, is guaranteed longitudinally Volume of the vessel

-

J

mm mm

mm

mm

mm

mm

bar

bar mm

N/mm2

mm

N/mm2

mm

mm O C

O C

O C

1

') All pressures are gauge pressures.



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CEN ENr286-3 94 D 3404589 0087565 276 D

Page 6 EN 286-3 : 1994

4 Materials 4.1 Pressurized parts

4.1.1 Shell and ends The shell and ends shall be made of steel sheet grade SPH 235 or SPH 265 as specified in EN 10207. These steels shall be accompanied by a test report drawn up by the material manufacturer. The mean value of energy absorbed at break Kv determined on three longitudinal test pieces shall be at least 28 J at the minimum working temperature Tmin,

This essential safety requirement may be met as follows:

a) For t w s A, B and C vessels - by carrying out impact bending tests at the minimum temperature of -40 O C , at the responsibility of the material manufacturer; - or by using steels for which the appropriate guarantee of energy absorbed at break at the minimum temperature of -40 O C is given by a particular standard; - or at a temperature T* equal to or less than that obtained by extrapolation using the graph from figure 1.

Examples of use: - example no. 1: if e = 10 mm and

- example no. 2: if T* = - 20 O C and Tmin = -40 OC, emax = 12,7 mm.

T* = - 10 o c , Tmi, = -35 O C ;

b) For type B vessels only By ensuring that brittle fracture does not occur at the minimum service temperature -40 OC,

using the fracture mechanics theory through the use of a recognized standard or code and by applying knowledge of the physical and metallurgical properties at the temperature Tof a steel defined in a specific standard, whilst taking into account the stresses (primary and secondary stresses) and the thickness of the materials of the vessel.

4.1.2 Inspection bosses, pipe connection branches and drainage bosses The bosses shall be manufactured from bar or tube of a steel grade compatible with the grades of steel sheet comprising the vessel and shall be of weldable quality. The product analysis of this steel shall meet the following requirements: - R, < 580 Nimm2; - C < 0,25 %, S < 0,05 % and P < 0,05 %.

of Directive 87/404/EEC of 25 June 1987

Sheet thickness in millimetres

Figure 1. Extrapolation of the guaranteed energy absorbed at break at temperature Tmin



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CEN E N * Z ô h - 3 9 4 W 3 4 0 4 5 8 9 00875bb L O 2

4.2 Non-pressurized parts Accessories to be welded to the vessel, but which do not contribute to its strength, shall be made of steel grades compatible with the grades of steel sheet comprising the vessel and shall be of weldable quality. The product analysis of this steel shall meet the following requirements: - Rm I 580 N/mm2; - C I 0,25 %, S I 0,05 % and P I 0,05 %.

4.3 Welding materials The filler materials used for welding onto the vessels or welding the vessels themselves shall be suitable and compatible with the parent materials. They shall correspond to EN . . . (in preparation).

5 Design 5.1 Shell and ends

5.1.1 General The vessels are of simple geometrical form, composed of a cylindrical body of circular cross-section and two outwardly dished torispherical ends. The design of the vessels shall take into account the installation and maintenance conditions. The installation and maintenance conditions shall be given by the manufacturer or the user (see clause 13). NOTE. Examples of installation and maintenance requirements are given in informative annexes F, G and H.

5.1.2 Design of the shell Shells are generally made from a single sheet. If the shell is made of several welded parts, the number of circular welds shall be kept to a minimum.

Page 7 EN 286-3 : 1994

Longitudinal weld seams of parts of the shell shall: - not be located on the lower part of the vessel defined by an angle of 30° on either side of the vertical axis (see figure 2); - be sufficiently far apart such as to form an angle greater than 40° (see example in figure 3).

All welds, even of a temporary nature, located outside the designed seams are prohibited.

Drainage opening

Figure 2. Position of longitudinal welds on the bottom of the shell

5.1.3 Design of the ends 5.1.3.1 Shape and d i m i o n s of the ends The torispherical ends shall be made from a single sheet. Dishing and flanging shall be carried out by a mechanical forming procedure, for example by pressing or spinning. Hand forming is not permitted. The torispherical end (see figure 4) shall meet the reauirements of 5.1.3.1.1 and table 2 or 5.1.3.1.2 as applicable.

Drainage point or reference - mark on the lower part

Figure 3. Position of longitudinal welds on the shell



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CEN ENx286-3 94 W 3404589 0087567 O49 Page 8 EN 286-3 : 1994

I

5.1.3.1.1 Types A and C vessels R(nomina1) = Do r (nominal) = O,lD,

làble 2. Height of the cylindrical portion of I ~ I Dimensions in millimetres I

5.1.3.1.2 Type B vessels R (nominal) = Do r (nominal) 2 0,06D0 26 I hl 5 40 mm (see 5.1.5.2.2). 5.1.3.2 Heat treatment of ends after fomting Steel ends obtained by cold forming:

a) the nominal sheet thicknesses of which are equal to or less than 6 mm, can be used without postforming heat treatment; b) the nominal sheet thicknesses of which are greater than 6 mm and not more than 8 mm, shall undergo postforming heat treatment if the minimum temperature of the impact bending test (V-notch) required is less than - 10 OC; c) the nominal sheet thicknesses of which are greater than 8 mm, shall not be used without postforming heat treatment.

Where required, heat treatment after cold forming is a normalizing treatment (see above), i.e. heating beyond the range of critical temperatures followed by air cooling. The heating temperature shall be greater than the upper limit of the critical range (usually called point A3) but as close to it as possible. NOTE. For the steels specified in clause 4, the heat treatment temperature is between 890 O C and 950 O C . If this range does not feature in the standard, the actual normalizing temperature should be stated by the steel producer.

5.1.4 Calculation of shell and end thicknesses

5.1.4.1 Type A vessels 5.1.4.1.1 General The nominal thicknesses e of the shells and ends shall be such that:

e 2 e, + c + S The value of e, shall in no case be less than 2 mm. The corrosion allowance S is taken as equal to 1 mm. The manufacturer shall apply a correction to allow for thinning resulting from the manufacturing process.

5.1.4.1.2 Calculation of the shell thickness e,,

Kc = 20f + P

The nominal design stress f shall not be greater than the smaller of the values: 0,6Re~ and 0,3Rm. The values of R e ~ a n d Rm are stated in the material standard. For steels for which ReT is not guaranteed at 100 O C , the stressfis taken as equal

The values of Pand Kc to be taken into account are:

to 0,6Re~ x 0,9.

a) case no. 1: P 2 PS and K, = 1 for automatic welding and when tests are carried out in accordance with 11.1.2.1; b) case no. 2: P 2 1,25Ps and Kc = 1 for automatic welding and when tests are carried out in accordance with 11.1.2.2; c) case no. 3: P 2 1,25Ps and Kc = 1,15 for welding by a non-automatic process and when tests are carried out in accordance with 11.1.1.



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CEN ENx286-3 94 = 3404589 0087568 "85

5.1.4.1.3 Calculation of the thickness of the ends ech The end thickness shall be calculated in the following manner.

a) Calculate the value of P/(lOfl. For the value of f see 5.1.4.1.2. b) Calculate he/Do with he the smaller of the three values:

'0' and{- h' 4(R + e,h)

where: ech = ecs;

h = % + h 2

= eh + Do - J(Do - - (Do/2 - eh - Y)' (take = e,, + 1 + 0,3).

NmE. 0,3 is the minus rolling tolerance for the sheet.

c) Determine ech/Do from figure 5. d) Multiply the value found by Do to obtain the thickness ech.

e) Verify the calculation with this value in place of that of ecs.

Example of calculation of thickness ech of an end of steel SPH 235 in accordance with EN 10207, re^ = 235 N/mm2 (e I 16 mm) for a vessel of diameter Do = 400 mm.

P = 1,25Ps = 1,25 x 10 = 12,5 bar (case no. 2 in 5.1.4.1.2) for the shell P = Ps = 10 bar for the ends

R = Do = 400 mm r = O,lDo = 40 mm f = 108 N/mm2: the smaller of the two values:

K, = 1

0,3Rm 108; 0,6R,~ = 141.

Therefore P/lOf = 10/(10 x 108) = 0,00926 Calculate he/Do with he = smallest of 3 values:

a )h = + Do -

- J(Do - T)Z - (OJ2 - - ~ ) 2

= 3,6 + 400 - - d(400 - 40)2 - (400/2 - 3,6 - 40)2

= 79,35

DO2 = 99,42 b, 4(R + ech)

Page 9 EN 286-3: 1994

when e,h is taken as equal to ecs = K, 20f + P

20 x 108 + 12,5 - 12,5 x 400 -

= 2,3

thus% = 2,3 + 1 + 0,3 = 3,6 giving he = 79,35 and h,/Do = 0,198

From figure 5: e,h/DO = 0,0072

The verification of the calculation 2,88 in place of e,, = 2,3 gives:

ech = 0,0072 x 400 = 2,88

e,h = 2,9

5.1.4.2 Type B vessels 5.1.4.2.1 General The nominal thickness e of the shell be such that:

e z e , + c + S

with e,h =

and ends shall

The value of e, shall in no case be less than 2 mm. The corrosion allowance S is taken as equal to 1 mm. The manufacturer shall apply a correction to allow for thinning resulting from the manufacturing process.

5.1.4.2.2 Calculation of the shell thickness ecs The shell thickness e,, is calculated from the formula given in 5.1.4.1.2. However: - the value of the nominal design stress f is taken as equal to 0,3Rm/1,4; - the rupture strength of the steel used Rm is equal to or less than 360 N/mm2.

Where the vessel is attached to the vehicle by means of fixing brackets welded onto the shell, the manufacturer shall take into account the secondary stresses described in 5.3. The shell thickness e,, shall be less than 5 mm. 5.1.4.2.3 Calculation of the thicknesses of the ends ech The thickness of the ends ech is obtained by applying the method described in 5.1.4.1.3. However: - the value of the nominal design stressf is taken as equal to 0,3Rm/1,4; - the rupture strength of the steel used Rm is equal to or less than 360 N/mm2.

The value of e,h shall comply with the requirement:

0,002Do I e,. I 0,08D0.



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CEN ENm28b-3 9 4 3404589 008756'7 911 Page 10 EN 2W3 : 1994

echIoo

3

2

0,Ol -

o,oon7

S

O

6

5

4

3

r 0,151

0,001 -

-I--

-i-¡-

0,200 0,250 0,300 0,350 0,400

L in e /"o

2 3 4 5 6 7 8

I 0,001

Figure 5. Theoretical curves for dished ends

I li01 26

2 P/(iOf 1 3

5.1.4.3 me C vesels The thicknesses of the shells and ends shall be calculated in accordance with the instructions from 5.1.4.1.2 and 5.1.4.1.3. The manufacturer shall take into account the secondary stresses described in 5.3. 5.1.5 Welded joints of shells and ends 5.1.5.1 Longitudinal welds The welds shall be full penetration butt welds. Backing strips, even of a temporary nature, are not permitted. 5.1.5.2 Circular welds 5.1.5.2.1 A and C vessels Circular welds required for making very long shells are treated as longitudinal welds as defined in 5.1.5.1.

The shewend joints permitted are those shown in figures 6 to 10. The welds in figures 6 to 8 shall be of the full penetration type of the shell/end wall, for figure 9 full penetration of the shell wall, and for figure 10 full penetration of the end wail. For welding of sheets of different nominal thicknesses (shewend weld), there shall be alignment either of the neutral axes (figure 6) or of the walls of the internal face or external face, the connecting slope not exceeding 25 % (14O) (see figures 7 and 8) and the misalignment of neutral axes not exceeding 1 mm. If the misalignment of the neutral axes is greater than 1 mm, levelling shall be carried out as shown in figures 8a and 8b.



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EN 286-3 : 1994

Figure 6. Butt weld with centre lines aligned

[1 25% m a~.(14~)-,

Figure 7. Butt weld with centre lines offset

Figure 8a

Figure 8b

Figure 8. Butt welds with centre lines offset and connecting slope

y k2'5 r0,S rnrn

Figure 9. Weld of the shell ring to end with necked edge

30'rn;n.

NOTE. The joint shown in figure 10 is only applicable to vessels comprising a shell uithout a longitudinal weld or two welded ends.

Figure 10. Weld of the shell ring with necked edge to an end

5.1.5.2.2 Type B vessels The sheil/end joint shown in figure I l is the only one permitted for constructing a type B vessel. The vessel made in this way shall be subjected, prior to fabrication, to a type examination as described in clause 12. The weld shall fully penetrate the wall of the shell.



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CEN EN*28b-3 9 4 3404589 0087573 5 ï T = Page 12 EN 286-3 : 1994

Tangent plane of the cylindrical part and of the knuckle

10 mm min.

- (i) The permitted gap between the internai diameter of the shell and the external diameter of the end is:

a) <0,25 mm over at least 270 O ;

b) I 1 m over not more than 90 O.

Figure 11. Weld of an inserted end (type B only)

5.2 Openings

5.2.1 General 5.2.1.1 m e s A, B and C vessels Inspection bosses, pipe connection branches and drainage bosses are cylindrical parts comprising an internal pipe thread complying with IS0 228-1 or an IS0 metric thread in accordance with IS0 261. The permitted shapes and welding are defined in 5.2.4.1 and 5.2.4.2 The minimum number, dimensions and location on the vessel are defined in clause 6. The wall thickness of bosses shall not be less than 1,5 times the thickness of the sheet to which they are welded.

5.2.1.2 mes B and C vessels Inspection bosses, pipe connection branches and drainage bosses are cylindrical parts which may comprise an internal pipe thread where a pressure-type joint is made on the thread Rp in accordance with IS0 7-1.

5.2.2 Holes for bosses Where the diameter of the hole in the wail is greater than 75 mm, a reinforcement calculation is necessary in accordance with the method described in 5.2.3.

Where holes require reinforcement, the distance that they are to be apart is defined in 5.2.3.1. The maximum distance between the centre of the dished end and the outer edge of any holes shall not be greater than 0,4Do (see figure 12).

I 0, I

Figure 12. Position of a hole in an end ~ ~

Holes in shells and ends should be located as far as possible from welded seams and shall in no case cross any welded seam. The distance between any two welds measured from the extremity of the edge preparation shall not be less than 4 times the actual sheil or end thickness with a minimum of 20 mm (see figures 13a and 13b).



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CEN EN*28b-3 74 m 3404587 0087572 4Ob m Page 13

EN 286-3 : 1994

4 e min.

Figure 13a Figure 13b

Figure 13. Distance between two welds measured from the end of the edge preparation

5.2.3 Calculation of the opening reinforcement

5.2.3.1 Gema1 The calculation method described in 5.2.3.2 and 5.2.3.3 is applicable to sheils and dished ends in which circular holes are made in compliance with the following conditions and hypotheses. Reinforcing plates, where used, shall be made from the same material as that of the vessel to which they are welded. The distance between openings, measured from the outer face of the reinforcing plates or openings shall not be less than 2 x d, where two openings require reinforcement, or d, where only one of the two openings requires reinforcement.

a) Ri = D0/2 - e, for sheils; b) Ri = R for ends.

Reinforcement of the openings is obtained by the use of:

a) recess welded bosses (see figures 14a

b) welded reinforcing plates and recess welded and 14b);

bosses (see figure 14c).

Adequate reinforcement shall be provided in ali planes passing through the axis of the opening.

5.2.3.2 Reiqforcement of opening Only bosses of the ‘full penetration’ type as shown in figures 14a and 14b may be used. The length of the boss kb contributing to the reinforcement, used in equation (3) for determining Afi shall not be greater than d, [see equation ( Z ) ] :

kb h (2)

The value of erb used for determining Afi in equation (3) shall not be more than twice ers. The following condition shall also be complied with:

(3)

5.2.3.3 Reinforcement by reinforcing plate and boss One of the following two conditions shall be complied with:

- the permissible stressfb is less than stress$ Pl10 (Ap + 0,5(Afs + Afi + 0,7Afp)] sf(Afs + 0,7Afp) + fb’Afi

- the permissible stress fb is greater than stress $

A, ‘I 10 Afs + Afi + 0,7Afp where:

a) the areas A,, Ab, Afs and Af, are determined as shown in figures 14a, 14b and 14c. b) the maximum height of the boss (kb) to be used in the calculation is:

e) the maximum height of the part of the boss (hbi) inside the vessel, to be used in the calculation is:

d) the dimensions of the reinforcing plate to be used in the calculation are:

eV 5 e, and Irp 5 &

kb = O,w(dob - erbkrb

hbi = 075kb



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~

CEN EN*Zôb-3 94 m 3404587 0087573 342 m Page 14 EN 286-3 : 1994

I

Figure 14a. Reinforcement of cylindrical sheii with boss

Figure 14c. Reinforcement of spherical shell by reinforcing plate and boss

Figure 14. Reinforcement of opening

Figure 14b. Reinforcement of spherical shell with boss

6.2.4 Welding of bosses 5.2.4.1 Inspection o(pen.ings and pipe connection branches Welds may be full or partial penetration welds. A single partial-penetration weld is permitted for bosses of external diameter not exceeding 65 mm. The throat thickness g1 of the weld shall be at least equal to 1,5 times the thickness e of the wall to which the boss is welded (see figures 15, 17 and 18). The throat thickness g2 of the weld represented in figure 16 shall be at least equal to 0,7 times the thickness e of the wall to which the boss is welded.

Figure 16. Fixing of a boss by an external weld



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CEN EN*Z86-3 9 4 3404589 0087574 289

Figure 16. Fixing of a boss by internal and external welds

d S 6 5 mm Y

Figure 17. Fixing of a surface mounted boss on the outside of the vessel

Figure 18. Fixing of a surface mounted boss inside a vessel

Page 15 EN 286-3 : 1994

5.2.4.2 Drainage openings

5.2.4.2.1 Types A, B und C vessels The welds shall be fuil penetration welds of the wall of the vessel. Weld preparation of the vessel wall may be necessary. Examples of permitted welds are given in figures 19, 20 and 21. 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 22 to 29.

5.2.4.2.2 Types B and C vessels The welds shall be executed in accordance with the permitted welds shown in figures 30 and 31.

Figure 19. Fixing of a drainage boss by an external 1 weld

Figure 20. Fixing of a drainage boss by internal and external welds



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CEN EN*ZBb-3 9 4 = 3404589 0087575 115 W Page 16 EN 286-3 : 1994

Fïgure 2 1 a

Figure 21. Fixing of a drainage boss with drainage groove

Figure 21b

Figure 22. Dip tube fiied to an end

Figure 23. Dip tube fiied to the shell of a horizontal vessel

Figure 24. Dip tube fiied to the shell of a vertical vessel

Figure 25. Dip tube fixed to a top end of a vertical vessel



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CEN ENr28b-3 94 3404589 0087576 O52 = Page 17

EN 286-3 : 1994

Figure 26. Dip tube fixed to the upper part of the shell of a horizontal vessel

See figures X 15 and16

Figure 29. Recessed fixing of a dip tube to a boss

g2 3 0,3e

Figure 30. Surface mounted boss with two external welds

Figure 27. Fixing of a dip tube

I

I

Y

Figure 28. Fixing of a dip tube to a boss

I g, 3 o,?e I L

Figure 31. Surface mounted boss with an internal and an external weld

I



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CEN EN*Z8b-3 74 3404589 0087577 T98

Page 18 EN 286-3: 1994

5.3 Fixing brackets welded onto types B and C vessels Following an agreement between the user and the manufacturer, fixing brackets welded onto the shell may be used to attach the vessel to the vehicle (see figures 32 and 33). The vessel, with its fixing brackets, shall be designed to withstand fatigue stress due to the mass of the vessel, vibration transmitted by the vehicle and impacts resulting from the vehicle environment. The fixing brackets may be welded onto intermediate reinforcing plates welded onto the shell (see figure 33). These plates distribute the stresses over the shell. These reinforcing plates

shall be obligatory on vessels of diameter exceeding 310 mm (see figure 33). Their corners shall be rounded to a radius equal to or greater than six times the thickness of the plate with a minimum of 10 mm. They shall be provided with tell-tale holes for checking for leakage through the vessel wall. Welding of the fixing brackets shall be done before the pressure test described in 11.3. Fwng brackets of a design different from those shown in figures 32 and 33 may be used, at the request of the user, provided that they comply with the requirements of this standard. The welded edges of the brackets or of the reinforcing plate shall not be less than six times the thickness e of the shell away from any other welds.

Figure 32a

Optional reinforcement / fE+ /-

3 O" min.

mre 32b

Figure 32. Fiwig brackets



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CEN EN*28b-3 9 4 M 3404589 0087578 924

Page 19 EN 286-3 : 1994

Corners 2 rad i used

9

n

7- I

I

Corners radiused

c E .-

al *o

4

Figure 32c Figure 32d

WVE. Brackets are not welded at points 1, 2, 3 and 4

Figure 32. Fixing brackets (concluded)

re in f orcemen t



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CEN EN*F!86-3 94 W 3404589 0087579 8 6 0 M

Page 20 EN 286-3 : 1994

This weld may be discontinuous

This weid may be discontinuous

Figure 33a

opt ional These welds may be discontinuous & forcement

3bmin. Corners

Figure 33b

Figure 33. Fixing brackets with reinforcing plates



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CEN EN*2ôb-3 9 4 3404589 0087580 5 8 2 M Page 21

EN 2863 : 1994

6 Inspection and drainage bosses I %ble 3. Diameters and locations of 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 e 1500) may have only one 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. The locations of the bosses shown in figure 34 are recommended. Other locations may be specified as long as they permit access for internal inspection and drainage of the vessel.

dib 1

Gb2

L1

Minimum diameter: 30 mm A diameter of 30 mm corresponds approximately to internal threads: - GI and M33 (types A, B and C vessels) - Rpl (types B and C vessels)

Minimum diameter: 18 mm A diameter of 18 mm corresponds approximately to internal threads: - GYz and M20 (types A, B and C vessels) - Rp% (types B and C vessels)

LI5 I Li I LI3

L < 1 5 0 0 mm

NOTE. The drainage opening may be located other than in the bottom of the vessel provided that the vessel has a system for ensuring its complete drainage (see 5.2.4.2.1).

Figure 34. Location of openings



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CEN ENs2ôb-3 94 3404589 0087581 419 = Page 22 EN 286-3: 1994

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 35. 7.2 Marking stamped in the metal of the vessel 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 36.

7.4 Identity and service marks This marking shall follow the general arrangement shown in figure 37 or, if necessary, shall be in three zones (see figure 35). These marks shall have a minimum height of 5 mm. The dimensions in figure 37 are given for guidance.

8 Corrosion protection The vessels shall have internal and external corrosion protection. This protection shall be the subject of an agreement between the railway customer and the supplier and meet the service surveillance requirements given in annexes G and H. The surfaces to be given this protection shall be free of any corrosion, grease or pickling product.

9 Qualification of welding procedures Welding procedures shall be specified in accordance with EN 288: Parts 1, 2 and 3. The qualification shall be witnessed by an approved inspection body.

10 Qualification of welders and welding operators Welders and welding operators shall be qualified in accordance with EN 287: Part 1. The qualification shall be witnessed by an approved inspection body.

eference marks 0 0 0 Locatiwi of marking

I

i/ - ------

CI T

Location of marking on end

NOTE. The location of marking on the shell or an end as shown in figure 35 is recommended. Other locations may be used on condition that the marks are positioned horizontally and can be read in the best possible conditions after installation on the vehicle.

Figure 35. Location of identity and service marks



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CEN EN*286-3 7 4 m 3404589 0087582 355 m Page 23

EN 286-3 : 1994

1 CR 3

. 5 -

1-1 r--. I

Dimensions in millimetres

The dimensions shall be in line with those of the marking described in 7.4.

Figure 36. Marking plate



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~ ~~~

CEN ENx28b-3 94 3404589 0087583 291 = Page 24 EN 286-3 : 1994

Dimensions in milìimetres 1) Name or trademark of the manufacturer and place of fabrication. (The arrangement and height of the characters are left to the discretion of the manufacturer). 2) Year of fabrication. 3) Vessel pattern number and batch identification. 4) Internal volume (in litres). 5) Maximum working pressure (in bars). 6) Mark of compliance with this standard: - for type A vessels: EN 286-3 - A; - for type B vessels: EN 286-3 - B; - for type C vessels: EN 286-3 - C.

The CE mark and the distinguishing number of the approved inspection body and the last 2 digits of the year in which the mark is affixed. 7) Minimum service temperature Tmin (in OC) 8) Maximum service temperature Tmax (in O C )

9) Name or trademark of the user. Order number allocated by the user. 10) Provision for date (last 2 digits of the year) and inspector?s stamp corresponding to the detailed inspections and tests given in G.6. NOTE. If the vessel is re-tested, the corresponding marks (data and stamp) should be located next to the existing obligatory marks. In the case of a plate, it should have a free space for this purpose. Figure 37. Identity and service marks



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CEN EN*L'86-3 9 4 3404589 0 0 8 7 5 8 4 I128 =

11 Testing of the vessels 11.1 Testing of welds by the manufacturer Welds shall be tested in accordance with the requirements of tables 4 to 6. The acceptance criteria are specified in 11.1.5. 11.1.1 Welds made by non-automatic welding In this case: P L 1,25Ps and K, = 1,15 (see 5.1.4.1.2 case no. 3).

11.1.2 Welds made by an automatic process

11.1.2.1 WithP I PsandK, = l ( see 5.1.4.1.2 case no. 1).

11.1.2.2 With P 1 1,25Ps and K, = 1 (see 5.1.4.1.2 case no. 2).

Page 25 EN 286-3 : 1994

11.1.3 Destructive testing of welds on coupon plates The following tests shall be carried out by the manufacturer on coupon plates:

a) one face bend test around a mandrel of diameter 2e, through an angle of 180°, according to IS0 5173; b) one reverse bend test around a mandrel of diameter 2e, through an angle of 180°, according to IS0 5173; c) one macro test; d) impact bend tests (V-notch) at - 40 O C , according to EN 10045-1, only for wall thicknesses greater than 5 mm;

- three Charpy V-notch tests on the weld metal; - three Charpy V-notch tests in the heat affected zone (HAZ), only on the first test coupon per batch in the case of verification and on two coupons per batch in the case of declaration of conformity.

làble 4. Amount of testing required for welds made by a non-automatic process ksting by the manufacturer kst

zach vessel zach welding nachine and each welding procedure

Non-destructive test (NDT) I Destructive test (DT)

i00 % visual inspection I During manufacture Longitudinal weld

1 coupon plate for the first 100 m of weld

Then every 100m of weld 1 100% X-ray of or 1 coupon plate the weld, including junctions, on the same vessel

Circumferential weld If the welding process or the designation of the filler metal is identical to that used for the longitudinal weld, then the circumferential weld needs no further testing. If the welding process or standard designation of the filler metal differs from those used for making the longitudinal weld:

1 coupon plate at the start of fabrication

Then every 300 m of weld with a minimum on any one vessel of the batch of: 1100% X-ray of or 1 coupon plate the weld I

Verification by the approved nspection body where required

Visual inspection of coupon ?lates and films held by the manufacturer. Inspection of ;he results of the various tests 2arried out in application of this standard



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CEN EN*:286-3 94 m 3404589 0087585 Ob4 m

I

Page 26 EN 286-3 : 1994

‘iàble 5. Amount of testing required for welds made by an automatic procedure with P 2 P, Testing by the manufacturer

Test

Each vessel Each welding machine and each welding procedure

I

Non-destructive test (NDT) I Destructive test (DT)

i00 *ó visual inspection I Longitudinal weld

After adjustment 1 X-ray per film of or 1 coupon plate length greater than 200 mm including at least one junction.

Every 250 m of weld or at each change of adjustment outside the tolerances fixed in the description of the welding procedure or at each change of standard designation of filler metal: 1 X-ray per film of or 1 coupon plate length greater than 200 mm including at least one junction

If the welding process or the designation of the filler metal is identical to that used for the longitudinal weld, then the circumferential weld needs no further testing. If the weding process or standard designation of the filler metal differs from those used for making the longitudinal weld;

1 X-ray per film of or 1 coupon plate length greater than 200 mm including at least one junction

Every 750 m of weld or at each change in adjustment outside the tolerances fixed in the description of the welding procedure or at each change in the standard designation of the filler metal: 1 X-ray per film of or 1 coupon plate length greater than 200 mm including at least one junction With a minimum per batch of vessels or per month: 2 X-rays per film of or 2 coupon plates length greater than 200 mm including at least one junction NOTE. The coupon plates or X-rays shall be from different vessels in the batch.

During manufacture

Circumferential weld

After adjustment

During manufacture

Verification by the approved inspection body where required

Visual inspection of coupon plates and films held by the manufacturer. inspection of the results o1 the various tests carried out in application of this standard



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CEN EN*Zôb-3 94 3404589 0087586 T T O

Page 27 EN 286-3 : 1994

I 'Iàble 6. Amount of testing required for welds made by an automatic 1 Testing by the manufacturer

Von-destructive test (NDT) I Destructive test (DT)

100 % visual inspection I Longitudinal weld

After adjustment 1 X-ray per film of or 1 coupon plate length greater than 200 mm including at least on junction

Every 500 m of weld or at each change of adjustment outside the tolerances fixed in the description of the welding procedure or at each change in the standard designation of the filler metal 1 X-ray per film of or 1 coupon plate length greater than 200 mm including at least one junction

Circumferential weld If the welding process or the designation of the filler metal is identical to that used for the longitudinal weld, then the circumferential weld needs no further testing. If the welding process or standard designation of the filler metal differs from those used for making the longitudinal weld:

1 X ray per film of or 1 coupon plate length greater than 200 mm including at least one junction

Every 1500 m of weld or at each change in adjustment outside the tolerances fixed in the description of the welding procedure or at each change in the standard designation of the filler metal: 1 X-ray per film of or 1 coupon plate length greater than 200 mm including at least one junction With a minimum per batch of vessels or per month: 1 X-ray per film of or 1 coupon plate length greater than 200 mm including at least one junction NCTTE. The coupon plates or X-rays shall be from any vessel in the batch.

During manufacture

After adjustment

During manufacture

rocedure with P L 1,25Ps Terification by the approved nspection body where required

v'isual inspection of coupon dates and films held by the nanufacturer. nspection of the results of the iarious tests carried out in ipplication of this standard



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CEN ENx286-3 94 3404589 0087587 937

5011 5012

Page 28 EN286-3: 1994

Slight and intermittent, permitted provided not sharp and does not exceed 0,5 mm depth

11.1.4 Qualit& of thefllms The density of the films shall correspond to class B of IS0 1106 : Parts 1 and 3, with a minimum density of 2 and a maximum density of 4. 11.1.5 Acceptance criteria for welds The results of all the tests shall be recorded. If a test gives an unsatisfactory result, the reason shall be sought and a further two samples shall be prepared and verified. If it can be shown that the failure is a result of a local or accidental defect and that the re-tests are satisfactory, the re-test results shall be accepted. If a new sample gives unsatisfactory results, all the welds of all the vessels produced since the start of production or since the last unsatisfactory non-destructive test shall undergo a non-destructive test. ?ables 7 and 8 show the acceptance levels. If any part of a weld has been repaired, the whole of the repaired weld seam shall be verified by means of a non-destructive test. Following the bending tests, the sample shall not have any defects greater than 3 mm in any direction. In the macrographic examination, the affected surface of the sample shall show, through the microscope, a welded point image with an adequate penetration and with no defects other than those permitted in table 8. For the impact bending tests, see 4.1.1.

514 509 511 513 517 506

11.1.6 Finish of longitudinal and circular joints All welds shall have a smooth finish without valleys and shall merge into the plates without undercutting or abrupt irregularity (see table 7). To ensure that the weld is fully penetrated and thus that the surface of the weld metal does not fall below the surface of the adjoining plate, weld metal may be built up as reinforcement on each side of the plate. This reinforcement shall not exceed the values given in table 9. The reinforcement need not be removed except to the extent that it exceeds the permissible thickness.

11.2 Dimensional inspection Vessels fabricated manually shall be inspected individually in order to ensure that they comply with the tolerances specified below. For vessels fabricated on an automatic line, the inspector shall ensure, at the start of fabrication, that the vessels meet the following dimensional requirements. He shall then carry out a thorough examination on at least one vessel in every 50 fabricated.

Reinforcement to be of continuous and regular shape with complete filling of groove

Not permitted

a b l e 7. Acceptance levels of defects in butt-welds, detected by visual examination I Defect

Lack of penetration Undercut

Shrinkage groove Root concavity Excessive penetration Excess weld metal Irregular surface

Overlap Linear misalignment Arc strike Spatter Tungsten spatter Torn surface Grinding mark Chipping mark

EN 26520 reference 1 Acceptance level I

5013 I As undercut I 515 I As undercut I 504 I See 11.1.6 I 502 I See 11.1.6 I

507 I See 5.1.5.2 I 60 1 602 602 1 603 604 605

Grind smooth Accepted subject to thickness verification and crack detection test



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C E N EN*28b-3 7 4 M 3404589 0087588 873 M

2012

2014

2024

Page 29 EN 286-3: 1994

Individual diameter eí4 but not more than 2 mm for a 2 !% projected area max. Check for lack of fusion before accepting. Otherwise as 2011, 2012, 2013

Not permitted

làble 8. Acceptance levels of defects in butt-welds, detected by X-ray examination

301 1 302 1 2015

Defect

Individual length max. e/3

Summation of length = e max. in 12e length if separation < 6 x longest defect

Cracks

304 1 3042 40 1

Porosity (isolated and grouped)

As porosity Not permitted Not permitted

Porosity (uniformly distributed)

Thickness of the thicker plate

Porosity (linear)

Maximum reinforcement thickness rl or r2 (see figure 38)

Crater pipes Slag and flux inclusions and elongated cavities (individual and parallel to weld axis)

Slag and flux inclusions and wormholes (random not parallel to weld axis)

Tungsten inclusions Copper inclusions Lack of fusion (side, root or inter-run)

EN 26520 reference 1 Acceptance level

1 o0 I Not permitted 201 1 2013 2017

Individual diameter el4 but not more than 2 mm for a 2 ')ó projected area max.

I

a b l e 9. Maximum permissible reinforcement for longitudinal and circular welds

Dimensions in millirnetre

Figure 38. Reinforcement thickness



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CEN ENb28b-3 94 3 4 0 4 5 8 9 0087589 70T

Classification

Page 30 EN 286-3 : 1994

p, . v

Unless otherwise stated, the following tolerances

a) length L f 7 mm; b) diameter Do (I 500 mm) f3 mm;

(> 500 mm) f 0,6 %; c) circularity of the cylindrical body 0,01Do;2) d) straightness of any generating f 0,01L;2) line of the cylindrical body e) volume of the vessel in the as-delivered state

apply:

f 3,5 %.

In addition, the wall of the vessels shall be free of localized defects such as sudden local irregularities, bumps, flats, cavities, folds, tool marks or visible symmetry defects. Cavities or bumps are permitted provided that they connect with the surrounding surface with gentle slopes not exceeding 25 % ( 1 4 O ) and with rounding of radius greater than 50 mm. Their dimensions shall not exceed:

f) radially I 3 m m g) longitudinally 0,25L h) transversely rDo/20

11.3 Pressure test Each vessel with all its fittings (bosses, brackets, etc.) shall be subjected to a hydrostatic test, prior to the application of the protective coating, equivalent to a pressure of 1,5 times the design pressure, i.e. :

a) 15 bar when the design pressure is taken as 10 bar (case no. 1 - 5.1.4.1.2); b) 2 18,75 bar when the design pressure is taken as 12,5 bar (case no. 2 and 3 - 5.1.4.1.2);

in the presence of a person of recognized competence (see clause 12). This pressure shall be maintained for a sufficient length of time to permit a visual examination of all the surfaces and all the welded joints. The vessel shall show no sign of plastic deformation or leakage. Subject to agreement, a pneumatic test may be carried out on each vessel, at the pressure defined above. WARNING. The pneumatic test is potentially a much more dangerous operation than the hydraulic test in that, irrespective of the size of the vessel, any failure during testing may result in an explosion. It should therefore only be carried out after consultation with the inspection body and having ensured that the safety measures taken comply with current legislation of the country in which the test is carried out. All vessels which fail the pressure test shall be rejected. Repairs may be permitted, with the agreement of the client network, but in this case the pressure test shall be repeated. 11.4 Special tests for types B and C vessels For type B vessels attached to the vehicle by welded brackets and for type C vessels, fatigue tests combining the mass of the vessel with the vibration and impacts transmitted by the vehicles shall be specified by the user.

12 Certification procedures This standard specifies three classes of vessel to which the certification procedure set out in table 10 applies.

Class 1 Greater than 3000 bar litres and not more than 10 O00 bar litres

Class 2 Greater than 200 bar litres and not more than 3000 bar litres

Class 3 Greater than 50 bar litres and not more than 200 bar litres

I

Certification procedure')

Type examinationl) (see annex D) or approval of design and construction dossier') (see annex C, clause 2)

Comment

Verification

Verification1 ) or declaration of conformity1) and surveillance (and special documents) Verification') or declaration of conformity') (and special documents)

') At manufacturer's choice. ') The mark of the inmection bodv shall be affixed to the vessels subiected to verification.

See annex A

See annex A

See annex B

See annex A

See annex B

2, The tolerances of shape and position are set out in IS0 1101.



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Page 31 EN 2863 : 1994

13 Information to be supplied at the time of invitation to tender and the time of order The invitation to tender and order, to which is attached the final drawing of the vessel, shall indicate the number of this standard and specify the following, if they have not already been specified in the drawing or the documents attached to it:

a) whether the vessel is of type A, B or C; b) the dimensions and volume of the vessel; c) the grade of steel, together with the number of the reference standard, from which the shell and ends are to be made (see clause 4); d) the type of shell/end joints (see 5.1.5.2); e) the shape of the openings and their welding to the vessel (see 5.2.4); f) the location of the openings (see clause 6); g) whether the marking is stamped in the metal or on a plate (see clause 7); h) the marks which the vessel shall have and their location on it (see 7.4); i) corrosion protection measures (see clause 8); j) a drawing showing how the vessel is assembled on the vehicle (see annex F); k) the requirements for service surveillance (see informative annexes G and HI.

14 Delivery After complete drying of the inside walls, the vessel in the delivery condition shall have all its openings plugged with plastic stoppers or some other means to ensure that the inside of the vessel is free from dust, water or any other foreign bodies. Prior to despatch, the vessel shall be suitably protected to avoid any damage (impact, deformation . . .) during transport. The packing shall be determined by the railway customer and the manufacturer,

15 Documentation to accompany the vessel The documentation to accompany the vessel shall include:

a) Particulars given on the vessel nameplate, including the serial identification. b) The use for which the vessel has been designed. c) The installation and maintenance requirements where they differ from those given in annexes F, G and H respectively. d) A declaration that the vessel is in accordance with the requirements of this European Standard (see annex B). e) For information to the customer, a statement on the test certificate that there shall be no welding operations carried out on pressurized parts of the vessel.

The documentation shall be in the language, or languages, of the country of destination.



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CEN EN*Z86-3 9 4 3404589 0087593 368

Page 32 EN 286-3: 1994

Annex A (normative) Verification A. l General Verification shall be performed by an approved inspection body on batches of vessels submitted by their manufacturer or by his authorized representative. Batches shall be accompanied by the type-examination certificate (see annex D) or by the certificate of approval of the design and manufacturing schedule (certificate of adequacy) (see annex C). When a batch is examined, the inspection body shall ensure that the vessels have been manufactured and checked in accordance with the design and manufacturing schedule and shall perform a hydrostatic test or, subject to the agreement of the Member State, a pneumatic test on each vessel in the batch at a pressure Ph equal to 1,5 times the design pressure. Moreover, the inspection body shall carry out tests on test pieces taken from a representative production coupon plate or from a vessel, as the manufacturer chooses, in order to examine weld quality. The tests shall be carried out on longitudinal welds. However, where differing welding techniques are used for longitudinal and circumferential welds, the tests shall be repeated on representative test pieces of circumferential welds.

A.2 Construction verification The approved inspection body shall perform the following checks and examinations.

A.2.1 Check of the manlCfactuBng record The manufacturing record shall be checked (see annex E).

A.2.2 External and internal inspection, dimensional check The inspection body shall check the identification of the vessel, e.g. the data-plate, and shall inspect the vessels visually, externally and internally for defects, especially the seams. The inspection shall be performed before any permanent covering coatings are applied. The inspection body shall check dimensions of shells, ends, openings and other parts that are of importance to the safety of the vessel for conformity with the drawings. Distances, important for safety (e.g. distance between openings), shall be checked if considered necessary. NOTE. Normally it is adequate if 10 % of vessels are checked and inspected, these to be selected by the approved inspection body.

A.2.3 Destructive testing Destructive testing as required by 11.1.3 shall be witnessed by the approved inspection body who will certify the results.

A.2.4 Non-destructive testing Non-destructive testing of butt weld seams as required by clause 11 shall be checked by the approved inspection body. This includes spot checks of films. If the films are not available, spot NDT shall be performed according to tables 4 to 6.

Annex B (normative) Declaration of conformity - Surveillance B . l General

B. 1.1 Declaration of conformity Vessels in accordance with this European Standard whose product of PS and Vexceeds 50 bar litres but. which does not exceed 3000 bar litres are, at the choice of the manufacturer, either subject to verification (see annex A) or subject to the declaration of conformity.

B.1.2 Surveillance By the declaration of conformity the manufacturer becomes subject to surveillance for vessels for which the product of Ps and Vexceeds 200 bar litres and does not exceed 3000 bar litres. The purpose of surveillance is to ensure that the manufacturer duly fulfils the obligations required by this European Standard. In t,he case of vessels manufactured in accordance with an approved specimen, for which a type examination certificate exists, surveillance shaii be the responsibility of the approved inspection body which issued this type of examination certificate. In the case of vessels not manufactured in accordance with an approved specimen, surveillance shall be the responsibility of the approved inspection body which issued the certificate of approval of the design and manufacturing schedule (certificate of adequacy) (see C.2).

B.2 Procedure required before commencement of manufacture of vessels of classes 2 and 3 (see clause 12) subject to a declaration of conformity

B.2.1 Responsibilities of the mancCfacturer Before commencing manufacture, the manufacturer shall submit to the approved inspection body which issued the type examination certificate or the certificate of adequacy, a document describing the manufacturing processes and all of the predetermined, systematic measures taken to ensure conformity of the vessels with this European Standard.



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CEN ENJ286-3 9 4 M 3 4 0 4 5 8 7 0087592 2 T 4

This document shall include the design and manufacturing schedule and the documents referred to in B.2.1.1 to B.2.1.5. l'lie manufacturer shall appoint a management representative who, irrespective of other responsibilities, shall have independent authority and responsibility for ensuring that the requirements of this European Standard are implemented and maintained.

B,2.1.1 A description of the means of manufacture and inspection appropriate to the construction of the vessels.

B.2.1.2 An inspection document describing the appropriate examinations and tests to be carried out during manufacture together with the procedures thereof and the frequency with which they are to be performed.

B.2.1.3 An undertaking to carry out the examinations and tests in accordance with the inspection document referred to above and to have a hydrostatic test carried out on each vessel in accordance with this European Standard.

B.2.1.4 The addresses of the places of manufacture and storage and the date on which manufacture is to commence.

B.2.1.5 In addition, when the product of Ps and V exceeds 200 bar litres, the manufacturer shall authorize access to the said places of manufacture or storage by the body responsible for the surveillance, for inspection purposes, and allow that body to select sample vessels and provide it with all necessary information, and in particular:

a) the design and manufacturing schedule; b) the inspection report; e) the type examination certificate or certificate of adequacy, where appropriate; d) a report on the examinations and tests carried out.

B.2.2 Responsibilities of the approved inspection bodies The inspection body responsible for the surveillance shall examine the documents referred to in B.2.1.1 and B.2.1.3 in order to check their conformity with the requirements of this European Standard and with:

a) the conditions stated in the certificate of adequacy; or b) the design and manufacturing record and the conditions stated in the type examination certificate.

Manufacturing cannot commence before the approved inspection body has issued written approval of this document.

Page 33 EN 286-3 : 1994

B. 3 Procedures required during manufacture of vessels of classes 2 and 3 (see clause 12) subject to a declaration of conformity

B.3.1 Responsibilities of the manufacturer The manufacturer shall ensure that the inspections and testing is carried out in accordance with the documented procedures to complete the evidence of full conformance of the vessel to this European Standard. The inspection and test status of vessels shall be identified by using markings, authorized stamps, tags, labels, inspection records, physical location or other suitable means which indicate conformance or non-conformance of vessels with regard to inspection and tests performed. Records shall identify the inspection authority responsible for the release of conforming vessels. The manufacturer shall maintain control of vessels that do not conform to the requirements of this European Standard. All non-conforming vessels shall be clearly identified and segregated to prevent unauthorized use, delivery or mixing with conforming vessels. Repaired or re-worked vessels shall be re-inspected in accordance with documented procedures.

B.3.2 Responsibilities of approved inspection bodies For vessels whose product of PS and Vexceeds 200 bar litres, the inspection body responsible for surveillance shall, during fabrication:

a) ensure that the manufacturer manufactures and checks the vessels in accordance with the documents described in B.2.1; b) take random samples - two at each visit (see B.3.4.2) - a.t the place of manufacture or storage of vessels for inspection purposes as given in B.3.3 and B.3.4.

B.3.3 Frequency of inspection body operation Initial operation a) and b) of B.3.2 shall be carried out within 2 months of the commencement of manufacture and, afterwards, random checks will be made at the normal rate of one visit per year if the rate of production of vessels of the same type is up to 3000/year and twice if production is more than 6000/year. For production quantities between these, the rate of visit will be adjusted accordingly.

B.3.4 Surveillance checks and tests 'Ib ensure that the manufacturer produces and checks vessels subject to the declaration of conformity in accordance with this European Standard, the inspection body responsible for the surveillance shall perform the following checks, inspections, examinations and tests.



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Page 34 EN2û6-3: 1994

B.3.4.1 Check of the design and manufacturing record, the inspection report and the report on the examinations and tests carried out, in particular with respect to completeness, consistency, validity of certificates, qualification of personnel, etc.

B.3.4.2 The inspection body shall select at random at least two vessels in such a manner that at least one vessel per family is selected per year. On these vessels, it shall perform an external and internal inspection, a dimensional check, a non-destructive test of all butt welds (radiographic examination) and a hydrostatic test (see A.l).

B.3.4.3 The inspection body shall make available to the manufacturer a copy of the surveillance report that has been prepared.

Annex C (normative) Design and manufacturing schedules C.l Content The design and manufacturing schedules shall contain the name of the manufacturer and the place of manufacture and shall give the following information:

- a detailed manufacturing drawing of the vessel type; - a set of instructions comprising:

a) the maximum working pressure, Ps . . . . bar; b) the maximum working temperature,

c) the minimum working temperature,

d) the volume of the vessel, V . . . . . litre;

..... T,, ;

T,i, ..... O C ;

e) the name or mark of the manufacturer; f ) a drawing showing assembly of the vessel to the rolling stock approved by the railway client indicating in particular the method of attachment (see annex F); g) the service surveillance requirements approved by the railway client (see annexes G and H);

a) the materials selected; b) the welding processes used; c) the checks to be carried out; d) any pertinent details as to the vessel design including the design pressure; e) the certificates relating to the suitable qualification of the welding procedures and of the welders or operators;

- a document describing:

f) if the certificates for the welding procedures, welders or operators are not available, this shall not prevent the approved body from evaluating the other documents. However, they shall be submitted before approval is given or manufacturing commences; g) the inspection slips for the materials used for the manufacturer of parts and assemblies contributing to the strength of the pressure vessel or a specimen of these inspection slips; h) a specimen of the proposed report on examination and tests.

C.2 Approval of design and manufacturing schedule (certificate of adequacy) If vessels are not manufactured on the basis of a type-examination certificate, the manufacturer or his authorized representative shall submit to an approved inspection body an application for design approval and enclose three copies of this design and manufacturing schedule (see C.1). Various vessels or vessel families can be included in one design and manufacturing schedule, but all vessel details (including branches, bosses and attachments) of the production envisaged shall be included. The approved inspection body shall examine these documents in order to check the conformity of the design, of the required tests, and of the qualifications with the requirements of this European Standard. If they are in agreement with the requirements of this standard the approved inspection body shall issue a certificate of adequacy which shall be forwarded to the applicant.

Annex D (normative) m e examination Type examination is the procedure by which an approved inspection body ascertains and certifies that a prototype vessel satisfies the provisions of this Part of this European Standard. The manufacturer or his authorized representative shall submit to an approved inspection body an application for type examination. The application shall include three copies of the design and manufacturing schedule (see annex C) and a prototype vessel which is representative of the production envisaged. If the application is lodged for various vessels a prototype vessel is required for each vessel type. Various vessels or vessel types can be included in one design and manufacturing schedule, but all vessel details (including branches, bosses and attachments) of the production envisaged shall be included.



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CEN EN*ZBb-3 9 4 e 3404589 0087594 O77

The approved inspection body shall examine the documents in order to check the conformity of design, qualifications and the proposed tests with the requirements of this European Standard. The approved inspection body shall also verify that the vessel has been manufactured in conformity with the design and manufacturing schedule and is representative of the type and shall perform appropriate examinations and tests (including 100 % NDTof main seams and a hydrostatic test). If the design and manufacturing schedule and the prototype(s) comply with the provisions of this part of this European Standard, the approved inspection body shall draw up a type-examination certificate (per vessel type) which shall be forwarded to the applicant. The certificate shall state the conclusions of the examination, indicate any conditions to which its issue may be subject and be accompanied by the descriptions and drawings necessary for identification of the approved prototype.

Annex E (normative) Content of the manufacturing record The manufacturing record of the vessels shall contain (at least) the following information.

E. 1 General information a) the name or mark of the manufacturer; b) the place of manufacture; e) the qualification certificates for the welding procedures and the welders or welding operators; d) the reports of the tests and inspections performed, or description of the proposed verifications.

Page 35 EN 286-3 : 1994

E.2 Specific information a) the identification codes of the vessels specific to the manufacturer (example no .. to ..); b) the type approval number or the certificate of adequacy; e) the diameter of the vessels; d) the volume of the vessels; e) the maximum working pressure; f ) the maximum working temperature; g) the minimum working temperature, if below -10 O C ; h) the test pressure; j) the drawing number(s); k) the date of manufacture; 1) the size of the batch; m) the inspection document for the materials used in the manufacture of main pressurized parts. For parts, other than shells and ends with diameters not exceeding 250 mm, a declaration by the manufacturer stating that only materials complying with the required documents have been used, is acceptable; n) the date of the hydrostatic test, signed by the manufacturer's inspector and, in the case of verification, by the inspector from the approved inspection body.

E.3 Records Records shall contain information required by E. 1 and E.2 in such a way as to allow traceability. For the purpose of traceability, records shall be maintained of the vessel number/customer. Records shall be kept for at least 40 years.



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C E N EN*E!86-3 9 4 3404589 0087575 T O 3 W Page 36 EN 286-3 : i994

Annex F (informative) Assembly to the vehicles E 1 Type A vessels

F. 1.1 Fixing The vessels should be fixed by means of straps with properties as indicated in F . l . l . l and inserts of corrosion protection tape as defined in F.1.1.4. The vessel is generally fixed by means of two straps (figures F.l and F.2). However, for small vessels, a single strap may be used as long as it does not obstruct reading of the identity and service marks. The straps are fastened to the vehicles by one of the approved methods shown in figures F.3 to E6. Other methods may be used provided that all safety requirements are complied with.

F W e i d e d vessel joint

Insulating tapes

Cradle 7 LWelded vessel joint

Insulating tape

Strap

Pigure E2 Fixing by straps of a vessel in the vertical position

Insulating tapes

Figure E 1 Fixing by straps of a vessel in the horizontal position



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CEN EN*2ôb-3 9 4 = 3404589 0087596 94T

Page 37 EN 286-3 : 1994

Figure F.3 End of straps with angle brackets

i --i-

Figure F.4 End with straps folded and reinforced

e' / --,.- i

NOTE. The bolts shown in figures F.5 and F.6 should be of the weldable type.

Figure F.5 Ends of straps with welded bolt

NOTE. The bolts shown in figures F.5 and F.6 should be of the weldable type.

Figure E6 Ends of straps with grooved welded bolt



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CEN ENw28b-3 9 4 3 4 0 4 5 8 9 0087597 BBb m

Section of flats

Page 38 EN 286-3 : 1994

25 x 4 45 x 6 60 x 6

F. 1.1.1 Fixing straps F. l . l . l . l General The fixing straps should be made of flat steel of minimum tensile strength R, I 580 N/mm2 as specified in EN 10025 or steel with equivalent mechanical properties and dimensions specified in F.1.1.1.2 or F.1.1.1.3. Straps made of circular rod are not permitted.

F. 1.1.1.2 Fixing by two straps The dimensions of the straps are given in table F. 1.

I 'Igble F. 1 Dimensions of straps I ~~

Dimensions in millimetres

o,, I 5 450 I > 450and 5 6001 > 600 I

F.1.2.3 Fixing by a single strap It should be located so as not to obscure the circular welds. F. 1.2.4 Protection of the drainage mechanism Where an automatic drainage mechanism is fitted directly to the vessel opening, it should be protected against accidental damage by a cap. NCYTE. In the case of vehicles fitted with an air dryer, the drainage opening may be closed by a threaded plug with a pressure relief hole, and gasket.

F.2 Types B and C vessels

F.2.1 Fixing to the vehicle Qpes B and C vessels may be fixed by means of straps as described in F. 1 or by fixing brackets welded onto the shell under the conditions set out in 5.3 and shown in figures 32 and 33. F.2.2 Mounting The drawing showing mounting of the vessel to the vehicle should ensure that the identity and service marks can be read under optimum conditions. F.2.3 Protection of the drainage mechanism Where an automatic drainage mechanism is mounted directly onto the vessel opening, it should be protected against accidental damage by a cap. NOTE. In the case of vehicles fitted with an air dryer, the drainage opening may be closed by a threaded plug with a pressure relief hole, and gasket.

Annex G (informative) Service surveillance of type Avessels G . l General The maintenance recommendations in this annex are based on several decades of experience of major railway networks of the Federal Republic of Germany (DB), the Netherlands (NS) and France (SNCF) . These recommendations meet the minimum safety requirements during normal service of type A vessels. The vessels are used throughout the whole service life of the vehicle or device to which they are fitted, to a maximum of 40 years. At the end of this period, they are dispensed with under the conditions specified in G. 10. However, under special circumstances (a series of vehicles being replaced or vehicles destined for a museum), the service life of the vessels may be prolonged subject to suitable surveillance specified in G.9. The service surveillance of the vessels complying with this European Standard is carried out during periodic inspections or revisions to the vehicle or the device fitted with it, under the following conditions.



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CEN ENa286-3 9 4 3404589 0087598 712

In a scheduled examination before 600 O00 kml) or 6 years 24 years on the occasion of a revision

Page 39 EN 286-3 : 1994

External visual inspection and drainage Internal and external inspection I No 16.4 and 6 . 5

6 . 2 Vessels used at: Ps 5 6 bar

Vessels of the same type, from whole vehicle fleet or from items they are fitted to, more than 20 years old

làble 6 .1 Service surveillance of vessels used at Ps I 6 bar

1 % rounded to the nearest whole number

Yes

Maximum interval between 2 operations Operation Removal Method and sanction

') This period may be extended to a maximum of 6 years if the vessel is protected against external attacks, for example if it is installed in an enclosure or is an integral part of the apparatus.

6 .3 Vessels used at: 6 bar < Ps I 10 bar

I a b l e 6 .2 Service surveillance of vessels used at 6 bar < Ps I 10 bar Maximum interval between 2 operations Operation Removal Method and

sanction I In a scheduled examination before 2 years and 8 weeks') drainage

External visual inspection and I N o 1 6 * 4 I 24 years on the occasion of a revision I Internal and external inspection I No I 6.4and 6 . 5 I I I I I l

') This period may be extended to a maximum of 6 years if the vessel is protected against external attacks, for example if it is installed in an enclosure or is an integral part of the apparatus. 1

In addition, the satisfactory performance of these vessels is ensured by an annual sampling examination under the following conditions.

I a b l e 6 .3 Annual sampling examination I Population of vessels concerned Sample I Removal Method and

sanction I 6.6 and 6 . 7 I I

NOTE 1. Inspections are fairly regular periodic maintenance operations. They are essentially checks intended to ensure that the main or critical components are always in a good operating condition. NOTE 2. Revisions are periodic maintenance operations at intervals greater than the inspection. The purpose is to overhaul the various components so that they operate satisfactorily until the next inspection. NOTE 3. The inspection and revision cycles are specific to each type of equipment.



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CEN ENx28b-3 94 M 3404589 0087599 659 Page 40 EN 286-3 : 1994

6 .4 External inspection

6.4.1 Cleaning Vessels that are particularly dirty should be cleaned so as to permit examination of the walls under acceptable conditions. Cleaning by air blast should be carried out until all dirt is completely removed.

6.4.2 Examination of marking If the marks specified in clause 7 are illegible, the vessel should be rejected. If a data plate is deformed as a result of impact or oxidation, but the marks are still visible, it may be replaced. Conformity to the original marking should be certified by the affixing of the expert's stamp. If a new plate is welded on to the vessel, the vessel should undergo a pressure test in accordance with 11.3.

6.4.3 Inspection of the walls 6.4.3.1 Defornation and irregularities If the walls of the vessel show localized deformations or irregularities resulting mainly from impacts, the vessel should be rejected if these deformations or irregularities exceed the tolerances given in 6.4.3.1.1 and 6.4.3.1.2.

6.4.3.1.1 Lhkhed ends Deformations and irregularities should not:

a) have any sharp angles (radius less than half the knuckle radius); b) be located on the welds or at a tangent to them; c) be located more than O,@, from the centre of the end; d) have a depth greater than l/loo of the vessel diameter.

6.4.3.1.2 Shell wall Deformation and irregularities should not:

a) connect with the surrounding surface with slopes greater than 25 % (14') or with roundings of radius less than half the knuckle radius; b) be deeper than: - l/so of the vessel diameter and width less than four times the depth; - of the vessel diameter for other cases.

6. 4.3.2 Corrosion Whatever the type of corrosion revealed by the inspection of the vessel, any defect of depth equal to or greater than 1 mm results in rejection of the vessel. NOTE. If the corrosion does not lead to rejection of the vessel, the corrosion protection treatment should be repeated in order to guarantee that the vessel is protected against corrosion until its next inspection as specified in 6.2 and 6.3.

6.4.3.3 Other cases leading to rejection, of the vessel If there is doubt about the seriousness of the defects listed above, or if the vessel has other discontinuities which may adversely affect its strength, it should be rejected.

6.4.4 Examination of the fastening straps If it is observed that a strap is broken or cracked it should be replaced. Welded repairs are not permitted.

6 . 5 Internal examination Internal inspection of the vessel walls is carried out with suitable apparatus, such as an endoscope for example. If traces of corrosion are detected, their extent should be assessed. Any pitting of depth equal to or greater than 1 mm should lead to rejection of the vessel. If there is doubt about the assessment of the depth of the corrosion, suitable apparatus for measuring the wall thickness should be used, for example ultrasonic apparatus. If the extent of the corrosion does not lead to rejection of the vessel, but is located in an area corresponding to an external area where traces of corrosion have already been detected, but without leading to rejection of the vessel, this vessel should be rejected. 6 . 6 Detailed inspection and hydrostatic test 6.6.1 General These operations should be carried out by competent approved personnel.

6.6.2 Detailed inspection Detailed inspection of a vessel entails its removal. Before carrying out the various phases of the inspection, the vessel should be examined to see if there are any defects which might lead to its rejection. 6.6.2.1 Preparation Internal and external walls of the vessel should be exposed by careful cleaning, if necessary, using chemical or mechanical stripping agents to remove the corrosion protection coating. 6.6.2.2 Internal and external inspection The internal and external inspection of the walls should be carried out in accordance with the provisions in 6 .4 and 6.5 with the specified consequences. In addition, if any crack, discontinuity in the weld seams or deterioration of the internal threads of the inspection openings or pipe connection branches are detected, the vessel should be rejected.



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CEN ENa28b-3 74 3404589 0087600 LTO

6.6.3 Hydrostatic test The vessel which has satisfactorily undergone the detailed inspection should then be subjected to a hydrostatic test under the conditions described in 11.3 of this European Standard. Once the vessel has successfully undergone the hydrostatic test, it should be stamped by the representative of the approved inspection body, or by the accredited representative, who witnessed the test. He affixes:

a) the date of the test (last 2 digits of the year); b) his stamp.

6.6.4 Treatment prior to return to service The vessel deemed satisfactory following the hydrostatic test should be dried and then given an internal and external anticorrosion coating within 4 h of its stripping in accordance with 6.6.2.1.

6.6.5 Return to service Vessels having successfully undergone the detailed inspection and hydrostatic test, and which have received their anticorrosion protection, may be refitted to the vehicle or device.

6 . 7 Analysis of the results of the annual sampling on 1 % of the population of a specific type of vessel Every 2 years, the results of the detailed inspections and hydrostatic tests which the vessels undergo and which are covered by 1 % sampling and visual inspections should be analysed by a competent administrative authority. Measures should be taken if the results of the 1 % sampling and internal inspections show a significant trend.

6 . 8 Withdrawal of vehicles or devices to which the vessel is fitted When a vehicle or device to which the vessel is fitted is withdrawn, the vessel should be discarded.

G.9 Special cases of vessels fitted to a series of vehicles being phased out, vehicles intended for a museum, or vehicles kept in service for historical reasons Vessels fitted to these vehicles may be maintained in service beyond 40 years subject to the following provisions:

a) vessels removed after 40 years; b) vessels then removed every 10 years thereafter;

in order to subject them to the operations described in G.6.

Page 41 EN 286-3 : 1994

6. 10 Rejection Any vessel reject,ed during the surveillance operation or as a result of 6 .8 should be rendered unusable by puncturing its walls to the right of the marking by means of a blow torch. Marking stamped in the metal or on a plate welded to the wall of the vessel should be rendered illegible.

G. 11 Filing of results of examination, inspections and tests Results of examination, inspectiom and hydrostatic tests should be recorded in a maintenance register, or by any means of storing and analysing them. The results of analyses of sanctions following the detailed inspections and hydrostatic tests should be recorded. It should be possible to submit all the results on request at any time to the representative of the approved body on intervention by the national administration.

G. 12 Responsibilities The service surveillance Operations on the vessels should be carried out on the responsibility of the railway companies and under the control of and under the conditions fixed by the competent administrative authority.

Annex H (informative) Service surveillance of type B and C vessels H. 1 General The maintenance recommendations presented in this annex are based on several decades of experience of the rail networks of the United Kingdom (BR). These recommendations meet the minimum safety requirements during normal service of types B and C vessels. The maintenance recommendations covered by annex G are applicable to types B and C vessels, except for clauses 6.2, 6 .3 and 6.4.3.2 which are replaced by clauses H.2, H.3 and H.4 below. Types B and C vessels are divided into two groups according to their function and the type of vehicle.



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C E N ENs28b-3 94 = 3404589 0087601 037

During a scheduled inspection during routine maintenance of the vehicle or device

Page 42 EN 286-3 : 1994

Visual external examination

H.2 Group 1 vessels Group 1 - Vessels mounted on locomotives or motor units used with one of the following functions:

a) main reservoir; b) brake supply reservoir; c) supplementary reservoir.

Maximum interval between 2 operations

I %ble H . l Service surveillance of group 1 vessels I

Operation

1 Maximum interval between 2 operations

During a scheduled inspection during routine maintenance of the vehicle or device

Operation

Visual external examination

Removal

15 years

Method and sanction according to annex G

Internal and external visual examination

No 6 . 4

I lo Internal and external visual examination G. 6

I Yes 1 6.4, 6 .5 and 1 H.3 Group 2 vessels Group 2 - Other vessels, all vehicles.

Removal

No

Method and sanction according to annex G

6 .4

% z - - p i x G. 6 I

H.4 Corrosion

H.4.1 mpes of corrosion The types of corrosion generalìy found during inspections of vessels are:

a) generalized corrosion: corrosion is described as generalized when it has caused a reduction in the thickness of the wall over an area in excess of 20 % of the internal surface of the vessel; b) localized corrosion: corrosion is described as localized when it has caused a reduction in the thickness of the waii over an area in excess of 20 % of the internal surface of the vessel; c) chain or linear corrosion: corrosion is described as chain or linear corrosion when it is in the form of a series of pits reducing the wall thickness at localized points. This corrosion generally occurs on the internal surface of the wall: - over a generating line of the shell when the vessel is mounted horizontally; - over a circumference of the end when the vessel is mounted vertically.

d) furrow-type corrosion: furrow-type corrosion is in the form of chain or ìinear corrosion but more concentrated forming a furrow in the metal; e) corrosion in isolated pits: corrosion in isolated pits is point corrosion in isolated areas. A concentration of pits exceeding 1 per 500 mm2 is regarded as localized corrosion.

H.4.2 Rejection criteria All criteria exceeding the following specification results in rejection of the vessel.

a) Generalized corrosion - the original surface (vessel as-new) is no longer recognizable; - the greatest recorded depth reaches 1 mm.

b) Localized corrosion - the original surface (vessel as-new) is no longer recognizable in the corroded zone; - the greatest recorded depth reaches the value of the difference between the actual vessel thickness and the calculated minimum thickness (ecs or ecJ .



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EN 286-3 : 1994

e) Chain or linear corrosion and furrow-type corrosion - the total length, all types of corrosion together and in all directions, exceeds the circumference of the vessel regardless of the depth; - the length is less than the circumference of the vessel and the greatest recorded depth reaches the difference between the actual thickness and the calculated minimum thickness of the shell (ecs or ech).

- an isolated pit has a circumscribed diameter greater than 5 mm and a depth equal to or greater than 1 mm; - the circumscribed diameter is less than 5 mm and the recorded depth reaches the difference between the actual thickness and the calculated minimum thickness (ecs or ech).

H. 4.3 Acceptance If the corrosion does not result in the rejection of the vessel, corrosion protection should be re-applied in order to guarantee the vessel against corrosion until its next examination according to the intervals specified in H.2 and H.3.

d) Corrosion in isolated pits



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CEN EN*E'Bb-3 74 = 3404587 0087603 70T BS EN 286-3 : 1995

National annex NA (informative)

Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted to lkchnical Committee PVE/17, upon which the following bodies were represented:

Associated Offices Technical Committee BEAMA Ltd. British Compressed Air Society British Railways Board British Steel Industry Department of Trade and Industry

Electricity Industry in United Kingdom Health and Safety Executive Independent Engineering Insurers Committee Process Plant Association Railway Industry Association of Great Britain Society of Motor Manufacturers and Traders Limited Transmission and Distribution Association (BEAMA Limited)

(Mechanical Engineering and Manufacturing Technology Division (Mmt))

National annex NB (informative)

Cross-references

Publication referred to

EN 287-1

EN 288-1 EN 288-2 EN 288-3 EN 10025

EN 10045-1 EN 10207

EN 26520

IS0 7-1

IS0 228-1

IS0 261

Corresponding British Standard

BS EN 287 Approval testing of welders for fusion welding Part 1 : Steek BS EN 288 Specvication and approval of welding procedures for metallic materials Part 1 : General rules for fusion welding Part 2 : Welding procedures spectyication fo r arc welding Part 3 : Welding procedure tests for the arc welding of steels BS EN 10025 Hot rolled products of non-alloy structural steels. Technical delivery conditions BS EN 10045 Charpy impact test on metallic materials Part 1 Test method (V- and U-notch~s) BS EN i0207 Steels for simple pressure vessels - Technical delivery requirements for plates, strips and bars BS EN 26520 Classvication of imperfections in metallic.fusion uields, with explanations BS 21 Specifìcation for pipe threads jor tubes and fittings where prpssure-tight joints are made on the threads (metric dimensions) BS 2779 Specvication for pipe threads for tubes and.fittings when pressure-tight joints are not made on the threads (metric dimensions) BS 3643 IS0 metric sereu! threads Part 1 : Principles and basic datu



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BS EN 286-3 : 1995

BSI 389 Chiswick High Road London W4 4AL

9502- 8- 0.45k- JWD

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.

Contract requirements

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.

Revisions

British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions.

Any person who finds an inaccuracy or ambiguity while using this British Standard should bring it to the attention of the Quality Manager, BSI without delay so that the matter may be investigated swiftly.

BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards.

Buying standards

Orders for all BSI, international and foreign standards publications should be addressed to Customer Services, Sales Department at Chiswick: lèl: 0181 996 7000; Fàx: 0181 996 7001.

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 information on national, European and international standards through its Library, the Standardline Database, the BSI Information Technology Service (BITS) and its Technical Help to Exporters Service. Contact the Information Department at Chiswick: Tel: O181 996 7111; Fax: 0181 996 7048.

Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Customer Services, Membership at Chiswick: Tel: 0181 996 7002; Fax: 0181 996 7001.

Copyright

Copyright subsists in all BSI publications and no part may be reproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in the course of implementing the standard of necessary details such as symbols and size, type or grade designations including use by incorporation into computer programs, but where these details are reproduced including without limitation in printed form, in computer programs or in any other form whatsoever, the permission in writing of BSI must be obtained and if granted will be on terms including royalty, before the product is sold, licensed or otherwise exploited for commercial gain. Enquiries about copyright should be made to the Copyright Manager at Chiswick.

ISBN O 580 21841 4 PVE/ 17



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