SIST EN 1993-4-2:2007/kFprA1:2014

SLOVENSKI STANDARD
SIST EN 1993-4-2:2007/kFprA1:2014
01-november-2014
Evrokod 3: Projektiranje jeklenih konstrukcij - 4-2. del: Rezervoarji
Eurocode 3 - Design of steel structures - Part 4-2: Tanks
Eurocode 3: Bemessung und Konstruktion von Stahlbauten - Teil 4-2: Tankbauwerke
Eurocode 3 - Calcul des structures en acier - Partie 4-2 : Réservoirs
Ta slovenski standard je istoveten z: EN 1993-4-2:2007/FprA1
ICS:
23.020.10 1HSUHPLþQHSRVRGHLQ Stationary containers and
UH]HUYRDUML tanks
91.010.30 7HKQLþQLYLGLNL Technical aspects
91.080.10 Kovinske konstrukcije Metal structures
SIST EN 1993-4-2:2007/kFprA1:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 1993-4-2:2007/kFprA1:2014

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SIST EN 1993-4-2:2007/kFprA1:2014

EUROPEAN STANDARD
FINAL DRAFT
EN 1993-4-2:2007
NORME EUROPÉENNE

EUROPÄISCHE NORM
FprA1
August 2014
ICS 23.020.10; 91.010.30; 91.080.10
English Version
Eurocode 3 - Design of steel structures - Part 4-2: Tanks
Eurocode 3 - Calcul des structures en acier - Partie 4-2 : Eurocode 3: Bemessung und Konstruktion von Stahlbauten
Réservoirs - Teil 4-2: Tankbauwerke
This draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 250.

This draft amendment A1, if approved, will modify the European Standard EN 1993-4-2:2007. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.

This draft amendment 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, 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.

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: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1993-4-2:2007/FprA1:2014 E
worldwide for CEN national Members.

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SIST EN 1993-4-2:2007/kFprA1:2014
EN 1993-4-2:2007/FprA1:2014 (E)
Contents Page
Foreword .3
1 Modification to the Foreword .4
2 Modifications to 1.1, Scope .4
3 Modifications to 1.2, Normative references .5
4 Modifications to 1.5, Terms and definitions .5
5 Deletion of 1.7.2, Conventions for global tank structure axis system for rectangular tanks .6
6 Modifications to 1.7.3 (new numbering 1.7.2), Conventions for structural element axes in
both circular and rectangular tanks.6
7 Modifications to 1.7.4 (new numbering 1.7.3), Conventions for stress resultants for
circular tanks and rectangular tanks .7
8 Modification to 2.2, Reliability differentiation .7
9 Modifications to 2.7, Modelling of the tank for determining action effects .9
10 Modification of 2.9.2, Partial factors for ultimate limit states .9
11 Deletion of 2.9.2.1, Partial factors for actions on tanks .9
12 Modification to 2.9.2.2, Partial factors for resistances .9
13 Deletion of 2.10, Combinations of actions . 10
14 Modification to 3.5.1, General . 10
15 Modification to 3.5.2, Minimum design metal temperature . 10
16 Modifications to 4.1.3, Effects of corrosion . 10
17 Modification to 4.2.2.1, General . 11
18 Deletion of 4.3, Analysis of the box structure of a rectangular tank . 11
19 Modifications to 5.3, Resistance of the tank shell wall . 11
20 Modification to 5.4.6.3, Design of shell man holes and shell nozzles of large size for LS1 . 11
21 Modification to 5.4.7, Anchorage of the tank . 12
22 Deletion of Clause 6, Design of conical hoppers . 12
23 Modification to 7.1.2, Roof design . 12
24 Modification to 7.3, Resistance of circular roofs . 12
25 Modification to 7.4.3, Roof to shell junction (eaves junction) . 12
26 Deletion of Clause 8, Design of transition junctions at the bottom of the shell and
supporting ring girders . 12
27 Deletion of Clause 9, Design of rectangular and planar-sided tanks . 12
28 Deletion of Clause 10, Requirements on fabrication, execution and erection with relation
to design . 12
29 Modification to Clause 11, Simplified design . 12
30 Modification to 11.2.1, Unstiffened roof shell butt welded or with double lap weld . 13
31 Modifications to 11.3.2, Stiffening rings . 13
32 Modification to A.1, General . 13

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SIST EN 1993-4-2:2007/kFprA1:2014
EN 1993-4-2:2007/FprA1:2014 (E)
Foreword
This document (EN 1993-4-2:2007/FprA1:2014) has been prepared by Technical Committee CEN/TC 250
“Structural Eurocodes”, the secretariat of which is held by BSI.
This document is currently submitted to the Unique Acceptance Procedure.
NOTE The instructions in the present amendment overstep the ones that were contained in the corrigendum
EN 1993-4-2:2007/AC:2009 where the same sections in EN 1993-4:2007 are impacted.
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SIST EN 1993-4-2:2007/kFprA1:2014
EN 1993-4-2:2007/FprA1:2014 (E)
1 Modification to the Foreword
nd
In the Foreword, in the section "National Annex for EN 1993-4-2", in the 2 paragraph, replace the whole list
with the following one:
"
– 2.2 (1)
– 2.2 (3)
– 2.9.2 (3)P
– 2.9.3 (2)
– 3.3 (3)
– 4.1.4 (3)".
2 Modifications to 1.1, Scope
Replace Paragraph (1) with the following one (including the present Footnote 1)):
"(1) Part 4-2 of Eurocode 3 provides principles and application rules for the structural design of vertical
cylindrical, conical and pedestal above ground steel tanks for the storage of liquid products with the following
characteristics:
3
a) tanks with capacity greater than 100 m (100 000 litres);
b) tanks that have significant fabrication or assembly on site;
c) shop-fabricated tanks with conical bottoms, supported on skirts or columns;
d) tanks with characteristic internal pressures above the liquid surface not more negative than −0,1 bar
1)
and not greater than 0,5 bar ;
e) design metal temperatures limited to the ranges:
1) tanks constructed using structural steel grades, −50ºC < T < +300ºC;
2) tanks constructed using austenitic stainless steels, −165ºC < T < +300ºC;
3) tanks constructed with special steel grades that have defined yield strengths up to higher
temperatures, −165ºC < T < the max. defined temperature for the grade;
4) tanks susceptible to failure by fatigue, T < 150ºC;
f) in cylindrical ground-supported tanks, the maximum design liquid level not higher than the top of the
cylindrical shell.".
Replace Paragraph (8) with the following one:
"(8) This Part 4-2 does not cover:
 tanks of rectangular planform;
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 tanks with capacity below 100 m ;
 tanks exposed to fire (refer to EN 1993-1-2);

1) All pressures are in bar gauge unless otherwise specified.
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SIST EN 1993-4-2:2007/kFprA1:2014
EN 1993-4-2:2007/FprA1:2014 (E)
 tanks with dished ends and diameter less than 5 m;
 cylindrical tanks with an aspect ratio of height to diameter greater than 3.".
3 Modifications to 1.2, Normative references
Replace "EN 1990" with "EN 1990:2002".
In the list of the parts of EN 1993, replace "Part 1.6:" with "Part 1.6:2007:".
In the list of the parts of EN 1993, replace "Part 1.10:" with "Part 1.10:2005:".
In the list of the parts of EN 1993, replace "Part 4.1:" with "Part 4.1:2007:".
4 Modifications to 1.5, Terms and definitions
In 1.5.1, replace the last sentence with the following one: "In the tank construction industry, this term is also
taken to have the special meaning of the vertical wall of a cylindrical tank, see 1.5.9.".
Delete Entry 1.5.3 and renumber the following numbered entries accordingly.
In 1.5.5 (new numbering 1.5.4), delete in the last sentence: "irrespective of whether the tank is circular or
rectangular in plan".
Replace the content of Entry 1.5.6 (new numbering 1.5.5) with "This term is used to refer to the stress-free
middle surface when a shell is subject to pure bending in any direction.".
In 1.5.8, (new numbering 1.5.7) replace the second sentence with: "In this standard it is assumed to be
circular in plan.".
Replace the content of Entry 1.5.9 (new numbering 1.5.8) with: "The term shell is often used in the tank
industry to refer to the vertical wall of a cylindrical tank. This usage is slightly confusing when compared with
the general definition (see EN 1993-1-6) given in 1.5.1, it is quite widely used, so it is also used in this
standard where appropriate. Where any confusion may arise, the term cylindrical wall is used instead.".
st
In 1.5.13 (new numbering 1.5.12), in the 1 sentence, delete "or flat plate elements".
nd
In 1.5.13 (new numbering 1.5.12), in the 2 sentence, delete "or box".
In 1.5.15 (new numbering 1.5.14), replace: "The shell-roof junction is the junction between the vertical wall
and the roof. It is sometimes referred to as the eaves junction, though this usage is more common for solids
storages." with: "The shell-roof junction is the junction between the vertical wall and the roof. It is also referred
to as the top angle or the eaves junction.".
In 1.5.17 (new numbering 1.5.16), in the first sentence, delete "or flat plate" and "or a vertical stiffener on a
box".
In 1.5.18 (new numbering 1.5.17), delete the last sentence: "In a shell of revolution it is circular, but in
rectangular structures is takes the rectangular form of the plan section.".
In 1.5.20 (new numbering 1.5.19), replace the first sentence with: "A ring girder or ring beam is a
circumferential stiffener which has bending stiffness and strength in the plane of the circular section of a shell
and also normal to that plane.".
In 1.5.20 (new numbering 1.5.19), delete in the second sentence: "or box structure".
In 1.5.23 (new numbering 1.5.22), replace: "An external tank structure to contain fluid that may escape by
leakage or accident from the primary tank. This type of structure is used where the primary tank contains toxic
or dangerous fluids." with: "An external tank structure to contain fluid that may escape by leakage or accident
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SIST EN 1993-4-2:2007/kFprA1:2014
EN 1993-4-2:2007/FprA1:2014 (E)
from the primary tank. This type of structure is usually used where the primary tank contains toxic or
dangerous fluids. A catch basin also effectively reduces the requirement for an extensive area of fluid
containment around the tank.".
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...