Tanks for the transport of dangerous goods - Metallic pressure tanks - Design and construction

This document specifies the minimum requirements for the design and construction of metallic pressure tanks having a maximum working pressure exceeding 50 kPa (0,5 bar), for the transport of dangerous goods by road and rail and sea. This document includes requirements for openings, closures and structural equipment; it does not cover requirements of service equipment. For tanks for the transport of cryogenic liquids, EN 13530 1 and EN 13530 2 apply.
Design and construction of pressure tanks according to the Scope of this document are primarily subject to the requirements of RID/ADR, Subsections 6.8.2.1, 6.8.3.1 and 6.8.5, as relevant. In addition, the relevant requirements of RID/ADR, Table A, columns 12 and 13, to Chapters 3.2, 4.3 and Subsection 6.8.2.4 apply. For the structural equipment RID/ADR, Subsections 6.8.2.2 and 6.8.3.2 apply, as relevant. The definitions of RID/ADR, Subsection 1.2.1, are referred to. For portable tanks see also RID/ADR, Chapter 4.2 and Sections 6.7.2 and 6.7.2. In addition, the relevant requirements of RID/ADR, Table A, Columns 10 and 11 to Chapters 3.2, 4.2, and Sections 6.7.2 and 6.7.3 apply. The paragraph numbers above relate to the 2017 issue of RID/ADR which are subject to regular revisions. This can lead to temporary non-compliances with EN 14025.
This document is applicable to liquefied gases including LPG; however for a dedicated LPG standard see EN 12493.
If not otherwise specified, provisions which take up the whole width of the page apply to all kind of tanks. Provisions contained in a single column apply only to:
tanks according to RID/ADR Chapter 6.8 (left-hand column);   portable tanks according to RID/ADR Chapter 6.7 (right-hand column).

Tanks für die Beförderung gefährlicher Güter - Metallische Drucktanks - Auslegung und Bau

Dieses Dokument legt die Mindestanforderungen für Auslegung und Bau von metallischen Drucktanks mit einem höchsten Betriebsdruck von mehr als 50 kPa (0,5 bar) für die Beförderung gefährlicher Güter auf der Straße, mit der Eisenbahn und mit Seeschiffen fest. Dieses Dokument enthält Anforderungen an Öffnungen, Verschlüsse und die bauliche Ausrüstung; Anforderungen an die Bedienungsausrüstung werden nicht behandelt. Für Tanks für die Beförderung von tiefkalten Flüssigkeiten gelten EN 13530-1 und EN 13530-2.
Auslegung und Bau von Drucktanks entsprechend dem Anwendungsbereich dieses Dokuments unterliegen im Wesentlichen den zutreffenden Vorschriften in RID/ADR, Unterabschnitte 6.8.2.1, 6.8.3.1 und 6.8.5. Zusätzlich gelten außerdem die zutreffenden Anforderungen nach RID/ADR, Tabelle A, Spalten 12 und 13, Kapitel 3.2, Kapitel 4.3 und Unterabschnitt 6.8.2.4. Für die bauliche Ausrüstung gelten RID/ADR, Unterabschnitt 6.8.2.2 bzw. Unterabschnitt 6.8.3.2. Auf die in RID/ADR, Unterabschnitt 1.2.1, enthaltenen Begriffsbestimmungen wird verwiesen. Zu ortsbeweglichen Tanks siehe auch RID/ADR, Kapitel 4.2, sowie Unterabschnitte 6.7.2 und 6.7.2. Darüber hinaus gelten die maßgeblichen Anforderungen von RID/ADR, Tabelle A, Spalten 10 und 11, Kapitel 3.2, Kapitel 4.2, sowie Unterabschnitte 6.7.2 und 6.7.3. Die oben angegebene Nummerierung der Abschnitte bezieht sich die Ausgaben der RID/des ADR von 2017, die regelmäßig überarbeitet werden. Daher kann es zu vorübergehenden Nichtübereinstimmungen mit EN 14025 kommen.
Dieses Dokument gilt auch für verflüssigte Gase einschließlich Flüssiggas (LPG); für eine dezidierte LPG-Norm siehe jedoch EN 12493.
Sofern nicht anders festgelegt, gelten die Festlegungen, die die gesamte Breite der Seite einnehmen, für alle Arten von Tanks. Festlegungen, die in nur einer Spalte enthalten sind, gelten ausschließlich für:
Tanks nach RID/ADR, Kapitel 6.8 (linke Spalte)   ortsbewegliche Tanks nach RID/ADR, Kapitel 6.7 (rechte Spalte)

Citernes pour le transport de matières dangereuses - Citernes métalliques sous pression - Conception et fabrication

Le présent document spécifie les prescriptions minimales pour la conception et la construction des citernes métalliques sous pression ayant une pression maximale de service supérieure à 50 kPa (0,5 bar) et utilisées pour le transport de marchandises dangereuses par route, par chemin de fer et par mer. Le présent document inclut les exigences relatives aux ouvertures, fermetures et équipements de structure ; il ne couvre pas les exigences relatives aux équipements de service. Pour les citernes destinées au transport de liquides cryogéniques, les normes EN 13530-1 et EN 13530-2 s’appliquent.
La conception et la construction des citernes sous pression conformes au domaine d’application du présent document sont principalement soumises aux exigences des sous-sections 6.8.2.1, 6.8.3.1 et 6.8.5 du RID/ADR, selon le cas. En outre, les prescriptions pertinentes en colonnes 12 et 13 du tableau A du chapitre 3.2, au chapitre 4.3 et à la sous-section 6.8.2.4 du RID/ADR s’appliquent. Pour les équipements de structure RID/ADR, les sous-sections 6.8.2.2 et 6.8.3.2 s’appliquent, selon le cas. Les définitions de la sous-section 1.2.1 du RID/ADR s’appliquent. Pour les citernes mobiles, voir également le chapitre 4.2 et les sections 6.7.2 et 6.7.2 du RID/ADR. En outre, les prescriptions pertinentes en colonnes 10 et 11 du tableau A du chapitre 3.2, au chapitre 4.2 et aux sections 6.7.2 et 6.7.3 du RID/ADR s’appliquent. Les numéros de paragraphe donnés ci-dessus se rapportent aux versions 2017 du RID/ADR, qui font régulièrement l’objet de révisions. Cela peut conduire à une non-conformité temporaire à l’EN 14025.
Le présent document s’applique aux gaz liquéfiés, dont le GPL. Pour une norme dédiée au GPL, se reporter toutefois à l’EN 12493.
Sauf indication contraire, les dispositions qui occupent toute la largeur de la page s’appliquent à tous les types de citernes. Les dispositions qui n’occupent qu’une colonne s’appliquent uniquement aux :
citernes conformément au chapitre 6.8 du RID/ADR (colonne de gauche) ;   citernes mobiles conformément au chapitre 6.7 du RID/ADR (colonne de droite).

Cisterne za prevoz nevarnega blaga - Kovinske tlačne posode - Konstruiranje in izdelava

Ta evropski standard določa minimalne zahteve za konstruiranje in izdelavo kovinskih tlačnih posod z najvišjim delovnim ali preskusnim tlakom nad 50 kPa (0,5 bara) za prevoz nevarnega blaga po cesti, železnici in morju. Ta evropski standard zajema zahteve za odprtine, zaključke in strukturno opremo; ne vključuje zahtev za obratovalno opremo. Za posode za prevoz kriogenih tekočin se uporabljata standarda EN 13530-1 in EN 13530-2.
OPOMBA 1:   Za zasnovo in izdelavo tlačnih posod v skladu s področjem uporabe tega evropskega standarda se prvotno uporabljajo zahteve določb RID/ADR, točke 6.8.2.1, 6.8.3.1 in 6.8.5, kot je ustrezno. Poleg tega veljajo ustrezne zahteve določb RID/ADR, stolpca 12 in 13 preglednice A za poglavja 3.2, 4.3 in 6.8.2.4. Za strukturno opremo se uporabljata pododdelka 6.8.2.2 in 6.8.3.2. Navedene so definicije določbe RID/ADR 1.2.1. Za prenosne posode glejte tudi poglavje 4.2, oddelka 6.7.2 in 6.7.3 določb RID in ADR. Poleg tega veljajo ustrezne zahteve določb RID/ADR, stolpca 10 in 11 preglednice A za poglavja 3.2, 4.2, 6.7.2 in 6.7.3. Zgornje številke odstavkov veljajo za izdajo RID/ADR iz leta 2013 in so predmet rednih revizij. To lahko povzroči začasno neskladnost s standardom EN 14025. Upoštevati je treba, da imajo zahteve RID/ADR prednost pred katero koli točko tega standarda.
OPOMBA 2:   Ta standard se uporablja za utekočinjene pline, vključno z utekočinjenim naftnim plinom (LPG), vendar za ustrezni standard za LPG glej EN 12493.
Če ni navedeno drugače, se določbe, ki so navedene na celotni širini strani, uporabljajo za vse vrste posod. Določbe v posameznih stolpcih se uporabljajo samo za:
– cestne in železniške tlačne posode v skladu s poglavjem RID/ADR 6.8 (stolpec na levi strani);   – prenosne posode v skladu s poglavjem RID/ADR 6.7 (stolpec na desni strani).

General Information

Status
Withdrawn
Publication Date
30-Oct-2018
Withdrawal Date
30-Jan-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
25-Jul-2018
Due Date
11-Nov-2019
Completion Date
25-Jul-2018

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 14025:2018
01-november-2018
1DGRPHãþD
SIST EN 14025:2013+A1:2016
&LVWHUQH]DSUHYR]QHYDUQHJDEODJD.RYLQVNHWODþQHSRVRGH.RQVWUXLUDQMHLQ
L]GHODYD

Tanks for the transport of dangerous goods - Metallic pressure tanks - Design and

construction

Tanks für die Beförderung gefährlicher Güter - Metallische Drucktanks - Auslegung und

Bau

Citernes pour le transport de matières dangereuses - Citernes métalliques sous pression

- Conception et fabrication
Ta slovenski standard je istoveten z: EN 14025:2018
ICS:
13.300 Varstvo pred nevarnimi Protection against dangerous
izdelki goods
23.020.20 Posode in vsebniki, montirani Vessels and containers
na vozila mounted on vehicles
SIST EN 14025:2018 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 14025:2018
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SIST EN 14025:2018
EN 14025
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2018
EUROPÄISCHE NORM
ICS 13.300; 23.020.20 Supersedes EN 14025:2013+A1:2016
English Version
Tanks for the transport of dangerous goods - Metallic
pressure tanks - Design and construction

Citernes pour le transport de matières dangereuses - Tanks für die Beförderung gefährlicher Güter -

Citernes métalliques sous pression - Conception et Metallische Drucktanks - Auslegung und Bau

fabrication
This European Standard was approved by CEN on 1 July 2018.

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. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14025:2018 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 14025:2018
EN 14025:2018 (E)
Contents Page

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

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

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

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

3.2 Symbols ............................................................................................................................................................... 8

4 Materials ............................................................................................................................................................. 9

4.1 General ................................................................................................................................................................ 9

4.2 Compatibility .................................................................................................................................................... 9

5 Design ............................................................................................................................................................... 10

5.1 General ............................................................................................................................................................. 10

5.2 Minimum shell thickness .......................................................................................................................... 10

5.3 Reduction of shell thickness..................................................................................................................... 10

5.4 Protection of the shell ................................................................................................................................ 11

5.5 Protection of equipment ............................................................................................................................ 11

5.6 Other design requirements ...................................................................................................................... 12

6 Calculation ...................................................................................................................................................... 12

6.1 General ............................................................................................................................................................. 12

6.1.1 General ............................................................................................................................................................. 12

6.1.2 Calculation scheme for the wall thickness of metallic pressure tanks of RID/ADR

Chapter 6.8 ..................................................................................................................................................... 12

6.1.3 Calculation scheme for the wall thickness of metallic portable pressure tanks of

RID/ADR Chapter 6.7 .................................................................................................................................. 13

6.2 Design criteria ............................................................................................................................................... 14

6.3 Calculation for internal pressure ........................................................................................................... 16

6.3.1 General ............................................................................................................................................................. 16

6.3.2 Wall thickness of the cylindrical section ............................................................................................. 16

6.3.3 Wall thickness of ends ................................................................................................................................ 17

6.3.4 Wall thickness of conical sections .......................................................................................................... 21

6.3.5 Openings and reinforcements ................................................................................................................. 23

6.3.6 Manhole covers ............................................................................................................................................. 30

6.3.7 Flanges, joints, bolts .................................................................................................................................... 35

6.4 Calculation for external pressure .......................................................................................................... 37

6.4.1 General ............................................................................................................................................................. 37

6.4.2 Tanks, where external over pressure is part of operating conditions ..................................... 37

6.4.3 Tanks, where external over pressure is not part of operating conditions .............................. 37

6.4.4 Test .................................................................................................................................................................... 37

6.5 Tank to frame connection/interface ..................................................................................................... 38

7 Construction and manufacturing ........................................................................................................... 38

7.1 General requirements ................................................................................................................................ 38

7.2 Cutting .............................................................................................................................................................. 38

7.3 Forming ............................................................................................................................................................ 39

7.3.1 General ............................................................................................................................................................. 39

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SIST EN 14025:2018
EN 14025:2018 (E)

7.3.2 Cold forming ................................................................................................................................................... 39

7.3.3 Hot forming ..................................................................................................................................................... 39

7.3.4 Ends ................................................................................................................................................................... 40

7.3.5 Heat treatment and normalizing............................................................................................................. 40

7.4 Welding ............................................................................................................................................................ 40

7.4.1 Qualification ................................................................................................................................................... 40

7.4.2 Welded joints ................................................................................................................................................. 40

7.4.3 Examination and testing of welds ........................................................................................................... 41

7.4.4 Temporary attachments ............................................................................................................................ 41

7.5 Manufacturing tolerances ......................................................................................................................... 41

7.5.1 Plate alignment ............................................................................................................................................. 41

7.5.2 Defects of form ............................................................................................................................................... 42

7.5.3 Thickness ......................................................................................................................................................... 42

7.5.4 Dished ends ..................................................................................................................................................... 42

7.5.5 Cylindrical sections ...................................................................................................................................... 42

8 Repairs .............................................................................................................................................................. 43

8.1 General ............................................................................................................................................................. 43

8.2 Repair of surface defects in the parent metal .................................................................................... 43

8.3 Repair of weld defects ................................................................................................................................. 43

Annex A (informative) Sample calculation for tank containers according to

RID/ADR Chapter 6.8................................................................................................................................... 44

A.1 Introduction ................................................................................................................................................... 44

A.2 Dimensions, characteristics of materials, operating and testing conditions .......................... 44

A.3 Calculation according to branch A .......................................................................................................... 45

A.4 Calculation according to branch B .......................................................................................................... 45

A.5 Calculation according to branch C .......................................................................................................... 46

A.6 Calculation according to branch D ......................................................................................................... 48

A.7 Results .............................................................................................................................................................. 57

Annex B (informative) Explosion pressure shock resistant design of tanks ......................................... 59

Bibliography ................................................................................................................................................................. 61

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SIST EN 14025:2018
EN 14025:2018 (E)
European foreword

This document (EN 14025:2018) has been prepared by Technical Committee CEN/TC 296 “Tanks for

the transport of dangerous goods”, the secretariat of which is held by AFNOR.

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 January 2019, and conflicting national standards shall

be withdrawn at the latest by January 2019.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 14025:2013+A1:2016.

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

European Free Trade Association.
Compared with EN 14025:2013+A1:2016 the following significant changes apply:
a) alignment with RID/ADR as known at publication of this European Standard;

b) modification of the definition "pressure tank" (3.1.1), removing the reference to test pressure;

c) deletion of requirements about the thickness of the flange of the end (6.3.3.3);

d) amendment of the definition of the thickness e in Figure 8 (examples for reinforcements of shell

openings) and Figure A.2 (example for a manhole opening) as well as in Formula (39); Sub-

Figure 8 e) amended, new Sub-Figure 8 g) added;

e) external pressure resistance testing (6.4.4) replaced with a reference to EN 12972;

f) requirements for the manufacturer’s certificate or acceptance test certificate removed and clarified

that it is issued according to agreement with the buyer/customer (7.1.3);

g) examination and testing of welds (7.4.3) replaced with a normative reference to EN 12972, except

for requirements for the welding of the large end of a cone without a knuckle to a cylinder;

h) manufacturing tolerances concerning the plate alignment (7.5.1) adjusted in accordance with

EN 12972;

i) explosion pressure shock resistant design of tanks (informative Annex B) amended so that dished

ends are included;
j) normative references updated;

k) alignment of the whole document with the current principles and rules for the structure and

drafting of CEN and CENELEC documents.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

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

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SIST EN 14025:2018
EN 14025:2018 (E)

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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SIST EN 14025:2018
EN 14025:2018 (E)
1 Scope

This document specifies the minimum requirements for the design and construction of metallic

pressure tanks having a maximum working pressure exceeding 50 kPa (0,5 bar), for the transport of

dangerous goods by road and rail and sea. This document includes requirements for openings, closures

and structural equipment; it does not cover requirements of service equipment. For tanks for the

transport of cryogenic liquids, EN 13530-1 and EN 13530-2 apply.

Design and construction of pressure tanks according to the Scope of this document are primarily

subject to the requirements of RID/ADR, Subsections 6.8.2.1, 6.8.3.1 and 6.8.5, as relevant. In addition,

the relevant requirements of RID/ADR, Table A, columns 12 and 13, to Chapters 3.2, 4.3 and

Subsection 6.8.2.4 apply. For the structural equipment RID/ADR, Subsections 6.8.2.2 and 6.8.3.2 apply,

as relevant. The definitions of RID/ADR, Subsection 1.2.1, are referred to. For portable tanks see also

RID/ADR, Chapter 4.2 and Sections 6.7.2 and 6.7.2. In addition, the relevant requirements of RID/ADR,

Table A, Columns 10 and 11 to Chapters 3.2, 4.2, and Sections 6.7.2 and 6.7.3 apply. The paragraph

numbers above relate to the 2017 issue of RID/ADR which are subject to regular revisions. This can

lead to temporary non-compliances with EN 14025.

This document is applicable to liquefied gases including LPG; however for a dedicated LPG standard

see EN 12493.

If not otherwise specified, provisions which take up the whole width of the page apply to all kind of

tanks. Provisions contained in a single column apply only to:

tanks according to RID/ADR Chapter 6.8 (left- portable tanks according to RID/ADR Chapter 6.7

hand column); (right-hand column).
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 1591-1, Flanges and their joints – Design rules for gasketed circular flange connections – Part 1:

Calculation

EN 12972, Tanks for transport of dangerous goods – Testing, inspection and marking of metallic tanks

EN 13094:2015, Tanks for the transport of dangerous goods – Metallic tanks with a working pressure not

exceeding 0,5 bar – Design and construction
EN 13445-2, Unfired pressure vessels – Part 2: Materials
EN 13445-3:2014, Unfired pressure vessels – Part 3: Design
EN 13445-4, Unfired pressure vessels – Part 4: Fabrication

EN 13445-8, Unfired pressure vessels – Part 8: Additional requirements for pressure vessels of aluminium

and aluminium alloys

EN ISO 3834-1, Quality requirements for fusion welding of metallic materials – Part 1: Criteria for the

selection of the appropriate level of quality requirements (ISO 3834-1)

EN ISO 3834-2, Quality requirements for fusion welding of metallic materials – Part 2: Comprehensive

quality requirements (ISO 3834-2)
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SIST EN 14025:2018
EN 14025:2018 (E)

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

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

(ISO 9606-2)

EN ISO 14732, Welding personnel – Qualification testing of welding operators and weld setters for

mechanized and automatic welding of metallic materials (ISO 14732)

EN ISO 15607, Specification and qualification of welding procedures for metallic materials – General rules

(ISO 15607)

EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials – Welding

procedure specification – Part 1: Arc welding (ISO 15609-1)

EN ISO 15609-3, Specification and qualification of welding procedures for metallic materials – Welding

procedures specification – Part 3: Electron beam welding (ISO 15609-3)

EN ISO 15609-4, Specification and qualification of welding procedures for metallic materials – Welding

procedure specification – Part 4: Laser beam welding (ISO 15609-4)

EN ISO 15613, Specification and qualification of welding procedures for metallic materials – Qualification

based on pre-production welding test (ISO 15613)

EN ISO 15614-1, 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)

EN ISO 15614-2, Specification and qualification of welding procedures for metallic materials – Welding

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

ISO 1496-3, Series 1 freight containers – Specification and testing – Part 3: Tank containers for liquids,

gases and pressurized dry bulk

ISO 7005-1, Pipe flanges – Part 1: Steel flanges for industrial and general service piping systems

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:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
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SIST EN 14025:2018
EN 14025:2018 (E)
3.1.1
pressure tank

tank as defined in the international regulations for the transport of dangerous goods by road or rail

having a maximum working pressure exceeding 50 kPa (0,5 bar)
3.2 Symbols

The following general symbols are used throughout the text. They are listed in alphabetical order and

special symbols are explained with the relevant formulae. Additional symbols used in the text are

explained in:
RID/ADR Chapter 6.8 RID/ADR Chapter 6.7
A minimum elongation at fracture of the metal chosen under tensile stress in %
d inside diameter of an opening
D internal diameter of shell in mm
D mean diameter of the cylindrical part of the tank at the junction of a cone

D outside diameter of the cylindrical part of the tank or the straight flange of the dished end

D inside diameter of the cylindrical part of D diameter of the shell (in m), but not less

i i
the tank or the straight flange of dished than 1,80 m
end
e minimum required wall thickness (in mm) of the shell
e minimum shell thickness for mild steel in millimetres, according to RID/ADR,
Subsections 6.8.2.1.18 and 6.8.2.1.19
e minimum shell thickness for the metal chosen in mm
e wall thickness of a conical part of a shell
e wall thickness of a hemispherical end
E Young's modulus
f nominal design stress (allowable stress)
h inside height of an ellipsoidal dished end
K shape factor of ellipsoidal ends
MWP maximum working pressure, in MPa MAWP maximum allowable working pressure,
in M Pa
p design pressure, in MPa P design pressure, in MPa
p equivalent dynamic pressure
dyn
p test pressure, in MPa
test

p vapour pressure at 50 °C or at the design P vapour pressure of the substance at

vap vap1
temperature, whichever is the higher; to 65 °C (according to RID/ADR,
be taken as the numerical value of the Subsection 6.7.2.1)
absolute pressure
P vapour pressure of the non-refrigerated
vap2
liquefied gas depends on the portable
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SIST EN 14025:2018
EN 14025:2018 (E)
tank type (according to RID/ADR,
Subsection 6.7.3.1)
P calculation pressure in MPa as specified in RID/ADR, Subsection 6.8.2.1.14
P test pressure in MPa
r inner knuckle radius, in mm
R inside spherical radius of the central part of a torispherical end

R guaranteed (upper) minimum yield strength or guaranteed minimum 0,2 % proof strength,

in N/mm (for austenitic steel the 1 % proof strength may be chosen)

R guaranteed (upper) minimum yield strength or guaranteed minimum 0,2 % proof strength,

e,t

at the relevant design temperature, in N/mm (for austenitic steel the 1 % proof strength at

the relevant design temperature may be chosen)
R 2
m guaranteed minimum tensile strength, in N/mm
R 2
m1 minimum tensile strength of the metal chosen in N/mm
R 2

m,t guaranteed minimum tensile strength at the relevant design temperature, in N/mm

σ 2
permissible stress in N/mm , as defined in RID/ADR, Subsection 6.8.2.1.16
S safety factor
λ welding coefficient
4 Materials
4.1 General

The tank shell shall be fabricated from metallic materials which shall be resistant to brittle fracture and

of adequate impact strength within the design temperature range. The material shall be suitable for

forming.

EN 13445-2 and EN 13445-8 apply, whilst the minimum material requirements given in RID/ADR,

Chapter 6.8 and Chapter 6.7, are fulfilled.
Aluminium may only be used for the shells of
portable tanks when indicated in a portable tank
special provision assigned to a specific substance
in RID/ADR, Chapter 3.2, Table A, Column 11 or
when approved by the competent authority.
NOTE 1 For aluminium and aluminium alloys, see also EN 14286.

NOTE 2 RID/ADR restrict the use of materials with respect to the maximum yield and tensile strength of fine-

grained steel for welded shells, maximum ratios of yield/tensile strength for welded steel shells and of the

minimum elongation at fracture for welded fine- grained other steel and aluminium shells.

Welded shells shall be fabricated from a material which has been shown to have acceptable welding

characteristics.
4.2 Compatibility

Shells, fittings, equipment and pipework which are in contact with the substance(s) intended to be

carried shall be constructed from materials which are:
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SIST EN 14025:2018
EN 14025:2018 (E)

a) substantially immune to attack by the substance(s) intended to be transported; or

b) properly passivated or neutralized by chemical reaction; or

c) lined with corrosion-resistant material directly bonded to the shell or attached by equivalent

means.
They comply with:
RID/ADR, Subsection 6.8.2.1.9 RID/ADR, Subsections 6.7.2.2 and 6.7.3.2

Gaskets shall be made of materials not subject to attack by the substances intended to be transported.

The materials of the tank, including any devices, gaskets, linings and accessories, shall not adversely

affect the substances intended to be transported in the tank.

Guidelines on material specifications in relation to the substances to be transported may be taken from

EN 12285-1:2003, Annex B.
5 Design
5.1 General
Tanks shall be designed to withstand without loss of contents the:

1) operating conditions including static and dynamic forces in normal conditions of carriage. In

addition, the design of portable tanks shall account for the effects of fatigue, caused by repeated

application of these loads through the expected life of the portable tank;
2) test conditions;
3) explosion-pressure-shock resistant condition (if required) (see Annex B);
under consideration of Clause 6.

If sudden temperature differences are to be expected during filling or discharge of the tank the buckling

effect of one sided expansion or contraction should be taken into account.
5.2 Minimum shell thickness
The shell thickness will not be less than that given in:

RID/ADR, Subsections 6.8.2.1.17 to 6.8.2.1.18, RID/ADR, Subsections 6.7.2.4 or 6.7.3.4,

see Figure 1 of this standard see Figure 2 of this standard
5.3 Reduction of shell thickness

The reduction of the minimum shell thickness When additional protection against shell damage

(see Figure 1) is allowed if protection of the shell is provided as described in 5.4, portable tanks

against damage through lateral impact or with test pressure less than 2,65 bar may have the

overturning is provided (see 5.4 and RID/ADR, minimum shell thickness reduced, in proportion to

Subsections 6.8.2.1.19 to 6.8.2.1.20 and 6.8.2.1.21 the protection provided (see RID/ADR,

respectively) whilst the minimum requirements Subsections 6.7.2.4.3 to 6.7.2.4.5).

given in RID/ADR, Subsection 6.8.2.1.17 are met.
For shell
...

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