prEN 286-2

Simple unfired pressure vessels designed to contain air or nitrogen - Part 2: Pressure vessels for air braking and auxiliary systems for motor vehicles and their trailers

1.1   This document applies to the design and manufacture of simple unfired serially made pressure vessels, herein after referred to as vessels, designed for air breaking equipment and auxiliary systems for motor vehicles and their trailers, and which:
a)   include fabrication by welding;
b)   have a simple geometry enabling simple-to-use production procedures. This is achieved by either:
1)   a cylindrical shell of circular cross section closed by outwardly dished and/or flat ends having the same axis of revolution as the shell; or:
2)   two dished ends having the same axis of revolution;
c)   have branches not larger in diameter than 0,5 of the diameter of the cylinder to which they are welded.
1.2   It applies only to vessels intended to contain compressed air, and which operate within the following constraints:
a)   subjected to an internal pressure greater than 0,5 bar;
b)   the parts and assemblies contributing to the strength of the vessel under pressure to be made either of non-alloy quality steel or of non-alloy aluminium or non-age hardening aluminium alloys;
c)   maximum working pressure 30 bar, the product of that pressure and the capacity of the vessel (PS ∙ V) is greater than 50 bar litres and not exceeding 1 500 bar litres;
d)   capacity not exceeding 150 litres;
e)   minimum working temperature not lower than −50 °C and maximum working temperature not higher than 100 °C.
It does not apply to vessels specifically designed for nuclear use, to vessels specifically intended for installation in or the propulsion of ships and aircraft, or to fire extinguishers.

Einfache, unbefeuerte Druckbehälter für Luft oder Stickstoff - Teil 2: Druckbehälter für Druckluftbremsanlagen und Hilfseinrichtungen in Kraftfahrzeugen und deren Anhängefahrzeugen

1.1   Dieses Dokument behandelt die Konstruktion und Herstellung von einfachen, serienmäßig hergestellten unbefeuerten Druckbehältern, die nachfolgend als Behälter bezeichnet werden, für Druckluftbremsanlagen und Hilfseinrichtungen in Kraftfahrzeugen und deren Anhängefahrzeugen und
a)   durch Schweißen hergestellt werden;
b)   eine einfache Geometrie aufweisen, die einfache Fertigungsverfahren ermöglichen. Dies wird entweder erreicht durch
1)   einen kreiszylindrischen Teil, der von nach außen gewölbten und/oder ebenen Böden, die dieselbe Achse haben wie der zylindrische Teil, abgeschlossen wird oder
2)   zwei nach außen gewölbte Böden mit gemeinsamer Achse;
c)   Abzweigungen besitzen, deren Durchmesser nicht größer als das 0,5-fache des Manteldurchmessers ist, an den sie angeschweißt sind.
1.2   Es gilt nur für Behälter zur Aufnahme von Druckluft mit folgenden Einschränkungen:
a)   der innere Überdruck ist größer als 0,5 bar;
b)   die zur Festigkeit des druckbeaufschlagten Behälters beitragenden Teile und Anschlüsse bestehen ent¬weder aus unlegiertem Qualitätsstahl, aus unlegiertem Aluminium oder aus alterungsbeständigen Aluminiumlegierungen;
c)   der zulässige Betriebsüberdruck beträgt 30 bar. Das Produkt aus diesem Druck und dem Behältervolumen (PS ⋅ V) ist größer als 50 bar l und nicht größer als 1 500 bar l;
d)   das Volumen ist nicht größer als 150 l;
e)   die niedrigste Betriebstemperatur beträgt −50°C, und die höchste Betriebstemperatur beträgt 100°C.
Es gilt nicht für Behälter für den besonderen Einsatz im kerntechnischen Bereich, nicht für Behälter für den Einbau in oder den Antrieb von Schiffen oder Flugzeugen und nicht für Feuerlöscher.

Récipients à pression simples, non soumis à la flamme, destines à contenir de l'air ou de l'azote - Partie 2 : Récipients à pression pour circuits de freinage et circuits auxiliaires des véhicules routiers et leurs remorques

1.1   Le présent document s'applique au calcul et à la fabrication des récipients à pression simples de série, non soumis à la flamme, désignés ci-après par le terme générique de « récipients » pour circuits de freinage et circuits auxiliaires pour véhicules routiers et leurs remorques, qui :
a)   sont de fabrication soudée ;
b)   sont de forme géométrique simple permettant la mise en œuvre de méthodes de fabrication simples, et sont donc constitués :
1)   soit d'une partie cylindrique de section droite circulaire fermée par des fonds bombés ayant leur concavité tournée vers l'intérieur ou des fonds plats ayant le même axe de révolution que la partie cylindrique,
2)   soit de deux fonds bombés ayant le même axe de révolution ;
c)   ont des tubulures de diamètre inférieur ou égal à 0,5 fois le diamètre de la partie cylindrique à laquelle elles sont soudées.
1.2   Il s'applique uniquement aux récipients destinés à contenir de l'air comprimé et qui fonctionnent dans les conditions suivantes :
a)   pression interne supérieure à 0,5 bar ;
b)   parties et assemblages contribuant à la résistance mécanique du récipient sous pression en acier de qualité non allié, en aluminium non allié ou en alliage d'aluminium non vieillissant ;
c)   pression maximale de service 30 bar, produit de cette pression par la capacité de récipient (PS ∙ V) supérieur à 50 bar·l mais inférieur à 1500 bar·l ;
d)   capacité inférieure à 150 l ;
e)   température minimale de service non inférieure à −50 °C et température maximale de service non supérieure à 100 °C.
La présente norme ne s'applique pas aux récipients destinés à un usage nucléaire, aux récipients installés dans les bateaux et les avions et destinés à leur propulsion et aux extincteurs d'incendie.

Enostavne nekurjene tlačne posode, namenjene za zrak ali dušik - 2. del: Tlačne posode za zračne zavore in pomožne sisteme za motorna vozila in njihove priklopnike

General Information

• Status: Not Published
• ICS: 23.020.30 - Pressure vessels, gas cylinders
• ICS: 43.040.40 - Braking systems
• Technical Committee: CEN/TC 54 - Unfired pressure vessels
• Drafting Committee: CEN/TC 54/WG 9 - Revision of EN 286-2 and En 286-3
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Directive: 2009/105/EC - DIRECTIVE 2009/105/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 16 September 2009 relating to simple pressure vessels
• Directive: 2014/29/EU - Directive 2014/29/EU of The European Parliament and of the Council of 26 February 2016 on the harmonisation of the laws of the Member States relating to the making available on the market of simple pressure vessels
• Mandate: M/BC/CEN/86/6 - Standardization request to CEN concerning simple unfired pressure vessels
• Ref Project: oSIST prEN 286-2:2019 - Simple unfired pressure vessels designed to contain air or nitrogen - Part 2: Pressure vessels for air braking and auxiliary systems for motor vehicles and their trailers

RELATIONS

• Revised: EN 286-2:1992 - Simple unfired pressure vessels designed to contain air or nitrogen - Part 2: Pressure vessels for air braking and auxiliary systems for motor vehicles and their trailers
• Effective Date: 18-Nov-2015

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 286-2:2019
01-november-2019
Enostavne neogrevane (nekurjene) tlačne posode, namenjene za zrak ali dušik - 2.
del: Tlačne posode za zračne zavore in pomožne sisteme za motorna vozila in
njihove priklopnike

Simple unfired pressure vessels designed to contain air or nitrogen - Part 2: Pressure

vessels for air braking and auxiliary systems for motor vehicles and their trailers

Einfache unbefeuerte Druckbehälter für Luft oder Stickstoff - Teil 2: Druckbehälter für

Druckluftbremsanlagen und Hilfseinrichtungen in Kraftfahrzeugen und deren
Anhängefahrzeugen

Récipients à pression simples, non soumis à la flamme, destines à contenir de l’air ou de

l’azote - Partie 2 : Récipients à pression pour circuits de freinage et circuits auxiliaires

des véhicules routiers et leurs remorques
Ta slovenski standard je istoveten z: prEN 286-2
ICS:
23.020.32 Tlačne posode Pressure vessels
43.040.40 Zavorni sistemi Braking systems
oSIST prEN 286-2:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 286-2:2019
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oSIST prEN 286-2:2019
DRAFT
EUROPEAN STANDARD
prEN 286-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2019
ICS Will supersede EN 286-2:1992
English Version
Simple unfired pressure vessels designed to contain air or
nitrogen - Part 2: Pressure vessels for air braking and
auxiliary systems for motor vehicles and their trailers

Récipients à pression simples, non soumis à la flamme, Einfache unbefeuerte Druckbehälter für Luft oder

destines à contenir de l'air ou de l'azote - Partie 2 : Stickstoff - Teil 2: Druckbehälter für

Récipients à pression pour circuits de freinage et Druckluftbremsanlagen und Hilfseinrichtungen in

circuits auxiliaires des véhicules routiers et leurs Kraftfahrzeugen und deren Anhängefahrzeugen

remorques

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 54.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official 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 CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 286-2:2019 E

worldwide for CEN national Members.
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oSIST prEN 286-2:2019
prEN 286-2:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms, definitions and symbols ................................................................................................................. 7

3.1 Terms and definitions ................................................................................................................................... 7

3.2 Symbols ............................................................................................................................................................ 10

4 Materials .......................................................................................................................................................... 12

4.1 Main pressurized parts .............................................................................................................................. 12

4.1.1 Steel vessels.................................................................................................................................................... 12

4.1.2 Aluminium vessels ....................................................................................................................................... 12

4.1.3 Additional materials and products ........................................................................................................ 13

4.2 Accessories contributing towards the strength of vessels ............................................................ 13

4.3 Non-pressurized parts ................................................................................................................................ 13

4.4 Welding consumables ................................................................................................................................. 14

5 Determination of the wall thickness ..................................................................................................... 14

5.1 General ............................................................................................................................................................. 14

5.2 Calculation method ...................................................................................................................................... 14

5.2.1 Nominal design stress................................................................................................................................. 14

5.2.2 Nominal thickness ....................................................................................................................................... 14

5.2.3 Calculated thickness of shells .................................................................................................................. 14

5.2.4 Calculated thickness of unpierced dished ends ................................................................................ 14

5.2.5 Calculated thickness of unpierced flat ends ....................................................................................... 16

5.2.6 Compensation calculation for cylindrical shells and dished end with openings

(bosses) ............................................................................................................................................................ 16

5.2.7 Compensation calculation for flat ends ................................................................................................ 20

5.3 Experimental method ................................................................................................................................. 23

5.3.1 General ............................................................................................................................................................. 24

5.3.2 Pressure test .................................................................................................................................................. 24

5.3.3 Burst test ......................................................................................................................................................... 24

6 Construction and fabrication ................................................................................................................... 24

6.1 Construction ................................................................................................................................................... 24

6.1.1 General ............................................................................................................................................................. 24

6.1.2 Design of openings ....................................................................................................................................... 25

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6.1.3 Weld joint design .......................................................................................................................................... 25

6.1.4 Inspection openings ..................................................................................................................................... 26

6.1.5 Drainage openings ....................................................................................................................................... 30

6.1.6 Attachments .................................................................................................................................................... 30

6.2 Fabrication ...................................................................................................................................................... 30

6.2.1 Forming of plates .......................................................................................................................................... 30

6.2.2 Tolerances on fit-up ..................................................................................................................................... 30

6.2.3 Heat treatment for aluminium alloy ...................................................................................................... 31

6.2.4 Welding ............................................................................................................................................................ 31

7 Qualification of welders, welding operators and welding inspectors ....................................... 31

8 Qualification of welding procedures ..................................................................................................... 31

8.1 Welding procedure test .............................................................................................................................. 31

8.2 Requirements ................................................................................................................................................. 31

8.2.1 Welded joints on steel ................................................................................................................................. 31

8.2.2 Welded joints on aluminium .................................................................................................................... 32

9 Resistance to corrosion .............................................................................................................................. 32

9.1 General ............................................................................................................................................................. 32

9.2 Steel vessels .................................................................................................................................................... 32

9.3 Aluminium vessels ....................................................................................................................................... 32

10 Tests and certificates .................................................................................................................................. 33

10.1 Tests to be carried out during manufacture ....................................................................................... 33

10.1.1 General requirement ................................................................................................................................... 33

10.1.2 Vessels designed by the calculation method ...................................................................................... 33

10.1.3 Vessels designed by the experimental method.................................................................................. 38

10.2 Pressure test ................................................................................................................................................... 39

11 Marking ............................................................................................................................................................ 39

12 Operating instructions ................................................................................................................................ 40

Annex A (normative) KV requirements for plate and strip materials (steel) ...................................... 41

Annex B (normative) Pressure cycling operation .......................................................................................... 43

Annex C (normative) Test of the protection against corrosion ................................................................. 44

C.1 Test samples ................................................................................................................................................... 44

C.2 Grid test of paints ......................................................................................................................................... 44

C.3 Salt spray test ................................................................................................................................................. 44

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/29/EU aimed to be covered ..................................................... 46

Bibliography ................................................................................................................................................................. 47

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oSIST prEN 286-2:2019
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European foreword

This document (prEN 286-2:2019) has been prepared by Technical Committee CEN/TC 54 “Unfired

pressure vessels”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 286-2:1992.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of the EU Directive

2014/29/EU.

For relationship with EU Regulation 2014/29/EU, see the informative Annex ZA, which is an integral

part of this document.
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1 Scope

1.1 This document applies to the design and manufacture of simple unfired serially made pressure

vessels, herein after referred to as vessels, designed for air breaking equipment and auxiliary systems

for motor vehicles and their trailers, and which:
a) include fabrication by welding;

b) have a simple geometry enabling simple-to-use production procedures. This is achieved by either:

1) a cylindrical shell of circular cross section closed by outwardly dished and/or flat ends having

the same axis of revolution as the shell; or:
2) two dished ends having the same axis of revolution;

c) have branches not larger in diameter than 0,5 of the diameter of the cylinder to which they are

welded.

1.2 It applies only to vessels intended to contain compressed air, and which operate within the

following constraints:
a) subjected to an internal pressure greater than 0,5 bar;

b) the parts and assemblies contributing to the strength of the vessel under pressure to be made

either of non-alloy quality steel or of non-alloy aluminium or non-age hardening aluminium alloys;

c) maximum working pressure 30 bar, the product of that pressure and the capacity of the vessel

(PS ∙ V) is greater than 50 bar litres and not exceeding 1 500 bar litres;
d) capacity not exceeding 150 litres;

e) minimum working temperature not lower than −50 °C and maximum working temperature not

higher than 100 °C.

It does not apply to vessels specifically designed for nuclear use, to vessels specifically intended for

installation in or the propulsion of ships and aircraft, or to fire extinguishers.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 10028-1:2017, Flat products made of steels for pressure purposes - Part 1: General requirements

EN 10028-2:2017, Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels

with specified elevated temperature properties

EN 10207:2017, Steels for simple pressure vessels - Technical delivery requirements for plates, strips and

bars

EN 10216-1:2013, Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 1: Non-

alloy steel tubes with specified room temperature properties
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EN 10217-1:2019, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 1:

Electric welded and submerged arc welded non-alloy steel tubes with specified room temperature

properties

EN 10217-2:2019, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 2:

Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties

EN 10222-2:2017, Steel forgings for pressure purposes - Part 2: Ferritic and martensitic steels with

specified elevated temperatures properties

EN ISO 148-1:2016, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-

1:2016)
EN ISO 2409:1994, Paints and varnishes — Cross-cut test (ISO 2409:1992)

EN ISO 4136:2012, Destructive tests on welds in metallic materials - Transverse tensile test (ISO

4136:2012)
EN ISO 5173:2010, Destructive tests on welds in metallic materials — Bend tests

EN ISO 5817:2014, Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding

excluded) - Quality levels for imperfections (ISO 5817:2014)

EN ISO 6520-1:2007, Welding and allied processes - Classification of geometric imperfections in metallic

materials - Part 1: Fusion welding (ISO 6520-1:2007)

EN ISO 6892-1:2016, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO

6892-1:2016)

EN ISO 9227:2017, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227:2017)

EN ISO 9606-1:2017, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1:2012

including Cor 1:2012 and Cor 2:2013)

EN ISO 9606-2:2004, Qualification test of welders - Fusion welding - Part 2: Aluminium and aluminium

alloys (ISO 9606-2:2004)

EN ISO 10042:2018, Welding - Arc-welded joints in aluminium and its alloys - Quality levels for

imperfections (ISO 10042:2018)

EN ISO 14341:2011, Welding consumables - Wire electrodes and weld deposits for gas shielded metal arc

welding of non alloy and fine grain steels - Classification (ISO 14341:2010)

EN ISO 14732:2013, Welding personnel - Qualification testing of welding operators and weld setters for

mechanized and automatic welding of metallic materials (ISO 14732:2013)

EN ISO 15607:2003, Specification and qualification of welding procedures for metallic materials - General

rules (ISO 15607:2003)

EN ISO 15609-1:2004, Specification and qualification of welding procedures for metallic materials -

Welding procedure specification - Part 1: Arc welding (ISO 15609-1:2004)
As impacted by EN ISO 5173:2010/A1:2011.
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EN ISO 15614-1:2017, Specification and qualification of welding procedures for metallic materials -

Welding procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys

(ISO 15614-1:2017)

EN ISO 15614-2:2005, Specification and qualification of welding procedures for metallic materials -

Welding procedure test - Part 2: Arc welding of aluminium and its alloys (ISO 15614-2:2005)

EN ISO 17636-1:2013, Non-destructive testing of welds - Radiographic testing - Part 1: X- and gamma-ray

techniques with film (ISO 17636-1:2013)

EN ISO 17636-2:2013, Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray

techniques with digital detectors (ISO 17636-2:2013)

EN ISO 18273:2015, Welding consumables - Wire electrodes, wires and rods for welding of aluminium and

aluminium alloys - Classification (ISO 18273:2015)
ISO 209:2007, Aluminium and aluminium alloys — Chemical composition

ISO 2107:2007, Aluminium and aluminium alloys — Wrought products — Temper designations

ISO 6361-2:2014, Wrought aluminium and aluminium alloys — Sheets, strips and plates — Part 2:

Mechanical properties
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1.1
type examination

procedure by which a notified body ascertains and certifies that a specimen of a vessel satisfies the

requirements of this document
3.1.2
conformity assessment

procedure adopted at the choice of the manufacturer to check and certify that the manufactured vessels

comply with this document
3.1.3
declaration of conformity

confirmation of the manufacturer that the vessels are in conformity with this document

3.1.4
controlled product test

procedure carried out by a notified body during manufacture to ensure that the manufacturer duly

fulfils the requirements of this document
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3.1.5
design and manufacturing documents

prepared by the manufacturer to describe the construction, materials and fabrication including the

certificates
3.1.6
manufacturer’s inspector

person(s) employed by the manufacturer, but sufficiently independent from the production personnel,

qualified and responsible for inspections, examinations and tests to be carried out on vessels by him or

under his responsibility by competent staff
3.1.7
qualification of the inspector

qualification means technical competency on the different inspections, examinations and tests to be

carried out under the manufacturer’s responsibility, as well as necessary experience

Note 1 to entry: It is the responsibility of the manufacturer to ascertain that the inspector is competent

3.1.8
automatic welding

welding in which all the welding parameters are automatically controlled, some of these parameters

may be adjusted to a limited amount (manually or automatically by mechanical or electronic devices)

during welding to maintain the specified welding conditions
3.1.9
non-automatic welding
all types of welding other than that defined in 3.1.8
3.1.10
type of vessel
vessels are of the same type if they simultaneously:

— have similar geometrical form (i.e. shell rings and ends or only ends, in both cases ends of the same

shape);

— have wall material and thickness within the limit of validity of the welding procedure test, including

those for bosses and inspection openings;

— have the same type of bosses and of inspection openings; numbers and positions may vary;

— have the same design temperature limitations
3.1.11
batch
consists at most of 3 000 vessels of the same type
3.1.12
series manufacture

more than one vessel of the same type manufactured during a given period by a continuous

manufacturing process in accordance with a common design and using the same manufacturing process

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3.1.13
family

vessels form part of the same family if they differ only in diameter and/or in the length of their

cylindrical portions
3.1.14
subfamily

vessels of the same family with the same wall thicknesses, the same material, the same welding

procedure, the same construction of details; the vessels may vary in number and position of

attachments and bosses
3.1.15
maximum design temperature

temperature that is used in the design calculations, and which is never less than the maximum working

temperature
3.1.16
minimum design temperature

lowest temperature used in the selection of materials, and which is never greater than the minimum

working temperature
3.1.17
maximum working temperature
max

highest stabilized temperature which the wall of the vessel may attain under normal conditions of use

3.1.18
minimum working temperature
min

lowest stabilized temperature in the wall of the vessel under normal conditions use

3.1.19
maximum working pressure
maximum gauge pressure which may be exerted under normal conditions of use
3.1.20
design pressure

pressure chosen by the manufacturer and used to determine the thickness of the pressurized parts

3.1.21
inspection slip

document by which the producer certifies that the products delivered meet the requirements of the

order and in which they set out the results of the routine in-plant inspection test, in particular chemical

composition and mechanical properties, performed on products made by the same production process

as the supply, but not necessarily on products delivered
Note 1 to entry: This corresponds to test report “2.2” defined in EN 10204.
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3.2 Symbols
For the purpose of this document, the following symbols apply:
A, A Elongation after rupture %
80mm
A , A See 5.2.7. 2
c R mm
A Cross sectional area effective as compensation 2
f mm
A Cross sectional area effective as compensation of the boss 2
fb mm
A Cross-sectional area effective as compensation of the shell 2
fs mm
A Area of pressurized zone 2
p mm
c Absolute value of the negative tolerance taken from the material standard mm
or as stated in the drawing plus the absolute value of the reduction of wall
thickness by the forming process
c As before for a branch or boss mm
C Calculation coefficient for unpierced flat ends —
d Diameter of hole mm
d Internal diameter of a boss mm
d Outside diameter of a boss mm
D Inside diameter of an unpierced flat end mm
D Outside diameter of the crown section of a torispherical end measured mm
to the tangent between crown and knuckle
D Outside diameter of the shell/ends mm
e Nominal wall thickness mm
e Actual wall thickness mm
e Actual wall thickness of the shell before the pressure test mm
act
e Actual wall thickness of the end mm
e Actual wall thickness of the shell mm
e Calculated thickness mm
e Calculated wall thickness of a branch or a fictitious branch with the same mm
internal diameter as the boss
e Calculated wall thickness of the dished end mm
e Calculated wall thickness of the shell mm
e Nominal wall thickness of the dished end mm
e e — corresponding nominal wall thickness as stated in the design mm
n act
drawing
e Wall thickness of boss contributing to reinforcement mm
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e Wall thickness of shell contributing to reinforcement mm
e Wall thickness of the shell mm
f Nominal design stress 2
N/mm
g Throat thickness of a weld mm
h Height of a dished end mm
h , h , h , h See 5.2.6.1 and Figure 3. mm
b be be1 be2
K Calculation coefficient which depends on the welding process —
KCV Failure energy (impact test) 2
J/cm
KV Failure energy (impact test) J
l Length between adjacent bosses mm
l Length of boss contributing to reinforcement mm
l Length of shell contributing to reinforcement mm
L See 5.2.7. mm
m See C.3. —
N See 6.1.3.1 and C.3. —
P bar
Design pressure (which shall not be less than PS)
P 1) bar
h Test pressure
PS 1) bar
Maximum working pressure
r Inside knuckle radius for torispherical ends
R Inside radius for shells and ends mm
R Minimum yield strength specified in the material standard 2
e N/mm
R Yield strength of the shell material as determined in the tensile test 2
e act N/mm
R Minimum yield strength at maximum working temperature specified in the 2
eT N/mm
material standard
R Minimum tensile strength specified in the material standard or guaranteed 2
m N/mm
in the inspection slip by the material manufacturer
R Tensile strength of the shell material as determined in
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