SIST EN 14025:2013
(Main)Tanks for the transport of dangerous goods - Metallic pressure tanks - Design and construction
Tanks for the transport of dangerous goods - Metallic pressure tanks - Design and construction
This European Standard specifies the minimum requirements for the design and construction of metallic pressure tanks having a maximum working or test pressure exceeding 50 kPa (0,5 bar), for the transport of dangerous goods by road and rail and sea. This European Standard 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.
NOTE Design and construction of pressure tanks according to the scope of this European Standard are primarily subject to the requirements of RID/ADR, 6.8.2.1, 6.8.3.1 and 6.8.5, as relevant. In addition, the relevant requirements of RID/ADR, columns 12 and 13 of Table A to chapter 3.2, 4.3 and 6.8.2.4 shall be met. For the structural equipment subsections 6.8.2.2 and 6.8.3.2 apply, as relevant. The definitions of RID/ADR 1.2.1 are referred to. For portable tanks see also Chapter 4.2 and Sections 6.7.2 and 6.7.3 of RID and ADR. In addition, the relevant requirements of RID/ADR, columns 10 and 11 of Table A to Chapter 3.2, 4.2, 6.7.2 and 6.7.3 shall be met.
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:
other tanks- (left-hand column). | portable tanks (right-hand column);
Tanks für die Beförderung gefährlicher Güter - Drucktanks aus Metall - Auslegung und Bau
Diese Europäische Norm legt die Mindestanforderungen für Auslegung und Bau von metallischen Drucktanks mit einem maximalen Betriebs- oder Prüfdruck von mehr als 50 kPa (0,5 bar) für die Beförderung gefährlicher Güter auf der Straße, mit der Eisenbahn und mit Seeschiffen fest. Diese Europäische Norm enthält Anforderungen an Öffnungen, Verschlüsse und die bauliche Ausrüstung; Anforderungen an die Bedienungsausrüstung werden nicht behandelt. Zu Tanks für die Beförderung von tiefkalten Flüssigkeiten siehe EN 13530-1 und EN 13530-2. ANMERKUNG Auslegung und Bau von Drucktanks entsprechend des Anwendungsbereichs dieser Norm unterliegen im Wesentlichen den zutreffenden Vorschriften in 6.8.2.1, 6.8.3.1 und 6.8.5 der RID/des ADR. Zusätzlich sind außerdem die zutreffenden Anforderungen nach Kapitel 3.2, Tabelle A, Spalten 12 und 13, 4.3 und 6.8.2.4 der RID/des ADR einzu-halten. Für die bauliche Ausrüstung gelten 6.8.2.2 bzw. 6.8.3.2. Auf die in 1.2.1 der RID/des ADR enthaltenen Begriffs-bestimmungen wird verwiesen. Zu ortsbeweglichen Tanks siehe auch Kapitel 4.2 sowie 6.7.2 und 6.7.3 der RID und des ADR. Darüber hinaus sind die maßgebenden Anforderungen Tabelle A, Spalten 10 und 11, 3.2, 4.2, 6.7.2 und 6.7.3 von RID/ADR einzuhalten. Sofern nicht anders festgelegt, gelten die Festlegungen, die die gesamte Breite der Seite einnehmen, für alle Arten von Tanks. Festlegungen in einzelnen Spalten gelten ausschließlich für: andere Tanks (linke Spalte) ortsbewegliche Tanks (rechte Spalte)
Citernes destinées au transport de matières dangereuses - Citernes métalliques sous pression - Conception et fabrication
La présente Norme européenne spécifie les prescriptions minimales pour la conception et la construction des citernes métalliques sous pression ayant une pression maximale de service ou une pression d’épreuve supérieure à 50 kPa (0,5 bar) utilisées pour le transport de marchandises dangereuses par route, par chemin de fer et par mer. La présente norme inclut les prescriptions relatives aux ouvertures, fermetures et équipements de structure ; elle ne couvre pas les prescriptions relatives aux équipements de service. Pour les citernes destinées au transport de liquides cryogéniques, les EN 13530-1 et EN 13530-2 s’appliquent.
NOTE 1 La conception et la construction des citernes sous pression conformes au domaine d'application de la présente norme sont principalement soumises aux prescriptions des 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, en 4.3 et en 6.8.2.4 du RID/ADR s’appliquent. Pour les équipements de structure, les paragraphes 6.8.2.2 et 6.8.3.2 s'appliquent, selon le cas. Les définitions du 1.2.1 du RID/ADR s’appliquent. Pour les citernes mobiles, voir également le Chapitre 4.2 et les paragraphes 6.7.2 et 6.7.3 du RID et de l’ADR. De plus, les prescriptions pertinentes en colonnes 10 et 11 du Tableau A du Chapitre 3.2, en 4.2, en 6.7.2 et en 6.7.3 du RID/ADR s’appliquent. Les numéros de paragraphe donnés ci-dessus se rapportent aux versions 2013 du RID/ADR, qui font régulièrement l'objet de révisions. Cela peut entraîner des non conformités temporaires à l'EN 14025. Il est important de savoir que les exigences du RID/ADR prennent le pas sur tout article de la présente norme.
NOTE 2 La présente norme 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 :
camions-citernes et wagons-citernes sous pression conformément au Chapitre 6.8 du RID/ADF (colonne de gauche) ; citernes mobiles conformément au Chapitre 6.7 du RID/ADF (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. 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
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.L]GHODYDTanks für die Beförderung gefährlicher Güter - Drucktanks aus Metall - Auslegung und BauCiternes destinées au transport de matières dangereuses - Citernes métalliques sous pression - Conception et fabricationTanks for the transport of dangerous goods - Metallic pressure tanks - Design and construction23.020.20Posode in vsebniki, montirani na vozilaVessels and containers mounted on vehicles13.300Varstvo pred nevarnimi izdelkiProtection against dangerous goodsICS:Ta slovenski standard je istoveten z:EN 14025:2013SIST EN 14025:2013en,fr,de01-december-2013SIST EN 14025:2013SLOVENSKI
STANDARDSIST EN 14025:20081DGRPHãþD
SIST EN 14025:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14025
October 2013 ICS 13.300; 23.020.20 Supersedes EN 14025:2008English Version
Tanks for the transport of dangerous goods - Metallic pressure tanks - Design and construction
Citernes destinées au transport de matières dangereuses -Citernes métalliques sous pression - Conception et fabrication
Tanks für die Beförderung gefährlicher Güter - Metallische Drucktanks - Auslegung und Bau This European Standard was approved by CEN on 31 August 2013.
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, 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:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14025:2013: ESIST EN 14025:2013
EN 14025:2013 (E) 2 Contents Page Foreword .4 1 Scope .5 2 Normative references .5 3 Terms, definitions and symbols .7 3.1 Terms and definitions .7 3.2 Symbols .7 4 Materials .8 4.1 General .8 4.2 Compatibility .9 5 Design .9 5.1 General .9 5.2 Minimum shell thickness .9 5.3 Reduction of shell thickness . 10 5.4 Protection of the shell . 10 5.5 Protection of equipment . 10 5.6 Other design requirements . 11 6 Calculation . 11 6.1 General . 11 6.1.1 General . 11 6.1.2 Calculation scheme for the wall thickness of metallic pressure tanks of RID/ADR Chapter 6.8 . 11 6.1.3 Calculation scheme for the wall thickness of metallic portable pressure tanks of RID/ADR chapter 6.7 . 12 6.2 Design criteria . 13 6.3 Calculation for internal pressure . 15 6.3.1 General . 15 6.3.2 Wall thickness of the cylindrical section . 15 6.3.3 Wall thickness of ends . 15 6.3.4 Wall thickness of conical sections . 19 6.3.5 Openings and reinforcements . 22 6.3.6 Manhole covers . 27 6.3.7 Flanges, joints, bolts . 32 6.4 Calculation for external pressure . 33 6.4.1 General . 33 6.4.2 Tanks, where external over pressure is part of operating conditions . 34 6.4.3 Tanks, where external over pressure is not part of operating conditions. 34 6.4.4 Test . 34 6.5 Tank to frame connection/interface . 34 7 Construction and manufacturing . 35 7.1 General requirements . 35 7.2 Cutting . 35 7.3 Forming . 35 7.3.1 General . 35 7.3.2 Cold forming . 36 7.3.3 Hot forming . 36 7.3.4 Ends . 36 7.3.5 Heat treatment and normalising . 36 7.4 Welding . 37 SIST EN 14025:2013
EN 14025:2013 (E)
3 7.4.1 Qualification . 37 7.4.2 Welded joints . 37 7.4.3 Examination and testing of welds . 37 7.4.4 Temporary attachments . 38 7.5 Manufacturing tolerances . 39 7.5.1 Plate alignment . 39 7.5.2 Defects of form . 39 7.5.3 Thickness . 40 7.5.4 Dished ends . 40 7.5.5 Cylindrical sections . 40 8 Repairs . 40 8.1 General . 40 8.2 Repair of surface defects in the parent metal . 40 8.3 Repair of weld defects . 41 Annex A (informative)
Sample calculation for tank containers according to RID/ADR Chapter 6.8" . 42 A.1 Introduction . 42 A.2 Dimensions, characteristics of materials, operating and testing conditions . 42 A.3 Calculation according to branch A . 43 A.4 Calculation according to branch B . 44 A.5 Calculation according to branch C . 44 A.6 Calculation according to branch D . 46 A.7 Results . 54 Bibliography . 56
SIST EN 14025:2013
EN 14025:2013 (E) 4 Foreword This document (EN 14025:2013) 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 April 2014, and conflicting national standards shall be withdrawn at the latest by April 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14025:2008. Compared to EN 14025:2008, the following changes have been made: a) the scope of the standard has been enlarged to cover portable tanks according to RID/ADR, Chapter 6.7; b) the standard has been adapted to the requirements of RID/ADR 2013; c) Annex A has been deleted and the references to RID/ADR have been included into the respective clauses of the standard; d) Subclause 6.3.5, Openings and reinforcements has been corrected; e) the normative references have been updated. This document is submitted for reference into the RID [9] and/or in the technical annexes of the ADR [10]. NOTE The technical annexes are available at the following website: http://www.unece.org./trans/danger/danger.htm for ADR and for RID at http://www.otif.org/en/dangerous-goods.htm respectively. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. 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, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 14025:2013
EN 14025:2013 (E)
5 1 Scope This European Standard specifies the minimum requirements for the design and construction of metallic pressure tanks having a maximum working or test pressure exceeding 50 kPa (0,5 bar), for the transport of dangerous goods by road and rail and sea. This European Standard 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. NOTE 1 Design and construction of pressure tanks according to the scope of this European Standard are primarily subject to the requirements of RID/ADR, 6.8.2.1, 6.8.3.1 and 6.8.5, as relevant. In addition, the relevant requirements of RID/ADR, columns 12 and 13 of Table A to chapter 3.2, 4.3 and 6.8.2.4 apply. For the structural equipment subsections 6.8.2.2 and 6.8.3.2 apply, as relevant. The definitions of RID/ADR 1.2.1 are referred to. For portable tanks see also Chapter 4.2 and Sections 6.7.2 and 6.7.3 of RID and ADR. In addition, the relevant requirements of RID/ADR, columns 10 and 11 of Table A to Chapter 3.2, 4.2, 6.7.2 and 6.7.3 apply. The paragraph numbers above relate to the 2013 issue of RID/ADR which are subject to regular revisions. This can lead to temporary non-compliances with EN 14025. It is important to know that requirements of RID/ADR take precedence over any clause of this standard. NOTE 2 This standard 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:
road and rail pressure tanks according to RID/ADR chapter 6.8 (left-hand column); portable tanks according to RID/ADR chapter 6.7 (right-hand column). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 287-1, Qualification test of welders — Fusion welding — Part 1: Steels EN 1418, Welding personnel — Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials EN 1435, Non-destructive examination of welds — Radiographic examination of welded joints EN 1591-1, Flanges and their joints — Design rules for gasketed circular flange connections — Part 1: Calculation method EN 10204, Metallic products — Types of inspection documents EN 13094:2008, 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 13445-3:2009, 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 SIST EN 14025:2013
EN 14025:2013 (E) 6 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) EN ISO 4136, Destructive tests on welds in metallic materials — Transverse tensile test (ISO 4136) EN ISO 5173, Destructive tests on welds in metallic materials — Bend tests (ISO 5173) EN ISO 5817, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) — Quality levels for imperfections (ISO 5817) EN ISO 9606-2, Qualification test of welders — Fusion welding — Part 2: Aluminium and aluminium alloys (ISO 9606-2) EN ISO 9712, Non destructive testing — Qualification and certification of NDT personnel (ISO 9712) EN ISO 10042, Welding — Arc-welded joints in aluminium and its alloys — Quality levels for imperfections (ISO 10042) 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) EN ISO 17635, Non-destructive testing of welds — General rules for metallic materials (ISO 17635) EN ISO 17637, Non-destructive testing of welds — Visual testing of fusion-welded joints (ISO 17637) EN ISO 17640, Non-destructive testing of welds — Ultrasonic testing — Techniques, testing levels, and assessment (ISO 17640) 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 SIST EN 14025:2013
EN 14025:2013 (E)
7 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the following term and definition applies. 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 or a test 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 A1
minimum elongation at fracture of the metal chosen under tensile stress in % di
inside diameter of an opening D
internal diameter of shell in mm DC
mean diameter of the cylindrical part of the tank at the junction of a cone De
outside diameter of the cylindrical part of the tank or the straight flange of the dished end Di inside diameter of the cylindrical part of the tank or the straight flange of dished end Di diameter of the shell (in m), but not less than 1,80 m e
minimum required wall thickness (in mm) of the shell e0
minimum shell thickness for mild steel in mm, according to 6.8.2.1.18 and 6.8.2.19 of RID/ADR e1
minimum shell thickness for the metal chosen in mm ek
wall thickness of a conical part of a shell eR
wall thickness of a hemispherical end E
Young's modulus fd
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 MPa p
design pressure, in MPa P
design pressure, in MPa pdyn
equivalent dynamic pressure ptest
test pressure, in MPa SIST EN 14025:2013
EN 14025:2013 (E) 8 pvap vapour pressure at 50 C or at the design temperature, whichever is the higher; to be taken as the numerical value of the absolute pressure Pvap1 vapour pressure of the substance at 65 C (according to 6.7.2.1 of RID/ADR) Pvap2 vapour pressure of the non-refrigerated liquefied gas depends on the portable tank type (according to 6.7.3.1 of RID/ADR) Pc
calculation pressure in MPa as specified
in 6.8.2.1.14 of RID/ADR PT
test pressure in MPA r
inner knuckle radius, in mm R
inside spherical radius of the central part of a torispherical end Re guaranteed (upper) minimum yield strength or guaranteed minimum 0,2 % proof strength, in N/mm² (for austenitic steel the 1 % proof strength may be chosen) Re,t guaranteed (upper) minimum yield strength or guaranteed minimum 0,2 % proof strength, at the relevant design temperature, in N/mm² (for austenitic steel the 1 % proof strength at the relevant design temperature may be chosen) Rm
guaranteed minimum tensile strength, in N/mm² Rm1
minimum tensile strength of the metal chosen in N/mm2 Rm,t
guaranteed minimum tensile strength at the relevant design temperature, in N/mm² σ
permissible stress in N/mm2, as defined in 6.8.2.1.16 of RID/ADR=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 -8 apply and the minimum material requirements given in RID/ADR Chapter 6.8 and Chapter 6.7 shall be fulfilled. RID/ADR Chapter 6.8 RID/ADR Chapter 6.7
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 Column (11) of Table A of Chapter 3.2 RID/ADR or when approved by the competent authority. NOTE 1 For aluminium and aluminium alloys, see also EN 14286. SIST EN 14025:2013
EN 14025:2013 (E)
9 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, and pipework shall be constructed from materials which are: a) substantially immune to attack by the substance(s) intended to be transported; or b) properly passivated or neutralised by chemical reaction; or c) lined with corrosion-resistant material directly bonded to the shell or attached by equivalent means. They shall comply with RID/ADR 6.8.2 RID/ADR 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 Annex B of EN 12285-1:2003. 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 proof conditions (if required); 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 shall not be less than that given in: RID/ADR 6.8.2.1.17 to 6.8.2.1.18, see Figure 1 of this standard RID/ADR 6.7.2.4 or 6.7.3.4, see Figure 2 of this standard SIST EN 14025:2013
EN 14025:2013 (E) 10 5.3 Reduction of shell thickness The reduction of the minimum shell thickness (see Figure 1) is allowed if protection of the shell against damage through lateral impact or overturning is provided (see 5.4 and RID/ADR 6.8.2.1.19 to 6.8.2.1.20 and 6.8.2.1.21 respectively) but the minimum requirements given in RID/ADR 6.8.2.1.17 shall be met. For shells of rail tank wagons no reduction of the minimum wall thickness due to protection is allowed. When additional protection against shell damage is provided as described in 5.4, portable tanks with test pressure less than 2,65 bar may have the minimum shell thickness reduced, in proportion to the protection provided (see RID/ADR 6.7.2.4.3 to 6.7.2.4.5). 5.4 Protection of the shell 5.4.1 When required by 5.3 shells of: tank containers portable tanks are protected against damage if one of the following measures is provided: structure, in which the shell is supported by a complete skeleton including longitudinal and transverse structural members. This structure shall conform to the requirements of ISO 1496-3; double wall construction, where the aggregate thickness of the outer metal wall and the shell itself is not less than the minimum shell thickness prescribed in: RID/ADR 6.8.2.1.18 and the thickness of the inner shell wall is not less than the minimum shell thickness prescribed in 6.8.2.1.19; RID/ADR 6.7.2.4.1 and 6.7.2.4.2 and the thickness of the inner shell wall is not less than the minimum shell thickness prescribed in 6.7.2.4.3 and 6.7.2.4.4; "sandwich" construction, which means shells made with double walls having an intermediate layer of rigid solid materials (e.g. foam, at least 50 mm thick), where the outer wall has a thickness of at least 0,5 mm of steel, 0,8 mm of aluminium or 2 mm of a plastics material reinforced with glass fibre. For other layer materials (e.g. mineral wool, at least 100 mm thick), the outer wall has a thickness of at least 0,8 mm of austenitic steel. Other combinations of materials used to provide protection against damage shall be shown to have equivalent strength. One method of comparing the strength of sheets of materials is given in Annex B of EN 13094:2008. 5.4.2 For shells of road tank vehicles see also 6.9.2 of EN 13094:2008.
5.5 Protection of equipment Items of equipment shall be protected against the risk of being wrenched off or damaged during transport or handling. For tanks other than rail tank wagons equipment shall be protected by strengthening rings, protective canopies or transverse or longitudinal members. This protection of equipment shall comply with 6.14
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