EN 13445-3:2014/A8:2019

SLOVENSKI STANDARD
01-maj-2019
1HRJUHYDQHQHNXUMHQHWODþQHSRVRGHGHO.RQVWUXLUDQMH'RSROQLOR$
Unfired pressure vessels - Part 3: Design
Unbefeuerte Druckbehälter - Teil 3: Konstruktion
Récipients sous pression non soumis à la flamme - Partie 3 : Conception
Ta slovenski standard je istoveten z: EN 13445-3:2014/A8:2019
ICS:
23.020.32 7ODþQHSRVRGH Pressure vessels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13445-3:2014/A8
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 23.020.30
English Version
Unfired pressure vessels - Part 3: Design
Récipients sous pression non soumis à la flamme - Unbefeuerte Druckbehälter - Teil 3: Konstruktion
Partie 3 : Conception
This amendment A8 modifies the European Standard EN 13445-3:2014; it was approved by CEN on 19 November 2018.

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. 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 amendment 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13445-3:2014/A8:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Modifications to Clause 2, Normative references . 4
2 Modification to 5.3.1, Actions . 4
3 Addition of a new Subclause 5.3.2.4, Load combinations . 4
4 Addition of a new Subclause 6.7, Nominal design stress of anchor bolting . 8
5 Modifications to 8.4, General . 8
6 Modification to Subclause 16.4, Local loads on nozzles in spherical shells . 8
7 Modification to 16.5, Local loads on nozzles in cylindrical shells . 18
8 Modification to 16.6.6, Bending Limit Stress . 27
9 Modification to 16.7.2, Specific symbols and abbreviations . 28
10 Modification to 16.7.4, Applied force . 29
11 Modification to 16.7.5, Load limits for shell . 29
12 Modification to 16.8.6.2, Vessel under external pressure . 29
13 Modification to 16.8.7, Load limit at the saddle (without a reinforcing plate) . 29
14 Modification to 16.12.4.1, Specific symbols and abbreviations . 29
15 Modification to 16.12.4.3, Check of the skirt in regions with openings . 29
16 Modification to 16.12.5.1, Specific symbols and abbreviations . 30
17 Modifications to 16.12.5.2, Anchor bolt and concrete forces . 30
18 Modification to 16.14, Global loads . 30
19 Modification to 16.14.2, Specific symbols and abbreviations . 30
20 Modification to 16.14.8, Compressive stress limits . 32
21 Modification to 16.14.8.1, Calculation . 32
22 Modification to 16.14.8.2, Tolerances . 34
23 Modifications to 16.14.9, Wind and earthquake loads . 38
24 Modification to Clause 22, Static analysis of tall vertical vessels on skirts . 39
25 Modification to O.4.1, General. 49
26 Modification to O.4.2, Polynomial coefficients . 49
27 Modification to O.4.3, Figures for physical properties of steels . 50
28 Addition of a new Annex V (informative), Consider a buffer for unknown nozzle
loads — Opening design for unknown nozzle loads . 50

European foreword
This document (EN 13445-3:2014/A8:2019) has been prepared by Technical Committee CEN/TC 54
“Unfired pressure vessels”, the secretariat of which is held by BSI.
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 October 2019, and conflicting national standards shall
be withdrawn at the latest by October 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 has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of
EN 13445-3:2014.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
the United Kingdom.
1 Modifications to Clause 2, Normative references
Add a footnote number “ ” after the reference “EN 1991-1-4:2005” and the corresponding footnote at the
bottom of the page:
“ EN 1991-1-4:2005 is impacted by the stand-alone amendment EN 1991-1-4:2005/A1:2010 and the
corrigendum EN 1991-1-4:2005/AC:2010.”.
In the reference to EN 1991-1-6, replace "EN 1991-1-6" with “EN 1991-1-6:2005”.
Add the following new reference at the appropriate place:
“EN 12195-1:2010, Load restraining on road vehicles — Safety — Part 1: Calculation of securing forces”.
2 Modification to 5.3.1, Actions
Add the following note at the end of the subclause:
“
NOTE The combination of actions is given in 5.3.2.4.”.
3 Addition of a new Subclause 5.3.2.4, Load combinations
Insert the following new subclause:
“
5.3.2.4 Load combinations
5.3.2.4.1 General
Load combinations of non-pressure loads in Table 5.3.2.4-1 are used in connection with calculations
according to Clause 16 and Annex C (linear elastic behaviour). The basic calculation of pressure envelope
by design pressures and temperatures shall be made before Clause 16 (or Annex C) calculations. The load
combinations in Table 5.3.2.4-1 are minimum to be taken into account, if they are relevant. There may
also be other loads.
5.3.2.4.2 Specific definitions
5.3.2.4.2.1 Dead loads
Maximum dead load (G ) is the weight of the whole un-corroded vessel with all internals (trays,
max
packing, etc.), attachments, insulation, fire protection, piping, platforms and ladders.
Corroded dead load (G ) is defined as G but with the weight of the corroded vessel.
corr max
Minimum dead load (G ) is the weight of the un-corroded vessel during the installation phase, excluding
min
the weight of items not already mounted on the vessel before erection (e.g. removable internals,
platforms, ladders, attached piping, insulation and fire protection).
NOTE A scaffold is normally self-supported. In this case, the weight of the scaffold is not included in the vessel
weight.
Transport dead load (G ) is the case, when vessel has the removable internals and insulation already
trans
mounted on the vessel in the workshop.
5.3.2.4.2.2 Live loads
Live loads (L) used in this clause are weight loads of the contents (fluids or solids in the bottom of the
vessel, on trays and in packing) and traffic loads on platforms and ladders by personnel and machinery.
5.3.2.4.2.3 Wind loads
Wind loads (W) are horizontal global pressure loads caused by wind and acting on the projected area of
the vessel and its attachments, as influenced by the force coefficients (see 22.4.4).
5.3.2.4.2.4 Earthquake loads
Earthquake loads (E) are quasi-static horizontal forces on the vessel sections caused by seismic
accelerations at the base of vessel calculated by the “lateral force method of analysis” (see 22.4.5).
5.3.2.4.2.5 Forces from attached external piping
Reaction forces from attached external piping are forces resulting from weight (G), wind (W), earthquake
(E) and other additional forces (F) as far as they influence the global equilibrium of the vessel (see 22.4.6
for columns).
NOTE Forces and moments on nozzles and supports on the vessel caused by attached external piping can act as
internal and/or external loads. Internal loads are those that cause local loads only and have no influence on the
global equilibrium because they are self-compensating. Furthermore, attached pipes can either load the vessel or
restrain it depending on their layout. Consideration of these aspects is given in the recommendations in 22.4.6.
5.3.2.4.3 Specific symbols and abbreviations
The following specific symbols and abbreviations are used in Table 5.3.2.4-1 in addition to those in
Clause 4:
E earthquake load (see 5.3.2.4.2.4)
F additional loads from piping (thermal expansion loads) (see 5.3.2.4.2.5)
f nominal design stress for operation conditions for anchor bolts, see Formula (6.7–1)
B,op
G minimum dead loads (see 5.3.2.4.2.1)
min
G maximum dead loads (see 5.3.2.4.2.1)
max
G corroded dead loads (see 5.3.2.4.2.1)
corr
G transport dead loads (see 5.3.2.4.2.1)
trans
L live loads of each loading case (contents, etc.) (see 5.3.2.4.2.2)
P internal calculation pressure as defined in 5.3.10 for P > 0 (including hydrostatic pressure)
i
P external calculation pressure as defined in 5.3.10 for P < 0 (e.g. vacuum)
e
W wind load (Clause 22 and EN 1991-1-4)
σ maximum allowable compressive stress for operation conditions in accordance with 16.14.8,
c,all
with σ as defined in 8.4 and with a safety factor of 1,5 in Formula (16.14–29)
e
σc,all,test maximum allowable compressive stress for test conditions in accordance with 16.14.8, with σe
as defined in 8.4 and with safety factor 1,05 in Formula (16.14–29)
& operator which means: superposition of the different load types for the axial and lateral forces,
the bending moments and the resulting shear and longitudinal stresses using the beam theory
for non-pressure loads and the membrane theory for pressure loads
Table 5.3.2.4–1 — Load combinations
Load Types of load Load combination Allowable tensile Allowable compressive Allowable tensile Explanations
Case included including weighting stress for shells stress for shells stress for anchor
factors bolts
Operation with internal
LC0 P , G P and G f σ f
i max i max d c,all B,op
pressure
0,9·P and G and L and F Operation with internal
i max
LC1 P , G , L, F, W f σ f
i max d c,all B,op
b
and 1,1·W pressure and wind
P and G and L and F and Operation with external
e max
LC2 Pe, Gmax, L, F, W fd σc,all fB,op
1,1·W pressure and wind
Operation without pressure
LC3 G , L, F, W G and L and F and 1,1·W f σ f
max max d c,all B,op
but with wind
Shut down (no pressure,
LC4 G , W G and 1,1·W f σ l f contents and thermal
corr corr d c,al B,op
reactions)
LC5 G , W G and 0,7·W f σ f Installation
min min d c,all B,op
Operation with internal
c
LC6 P , G , L, E 0,9·P and G and L and E f σ 1,2· f
i max i max exp c,all,test B,op
pressure and earthquake
Operation with external
c
LC7 P , G , L, E P and G and L and E f σ 1,2· f
e max e max exp c,all,test B,op
pressure and earthquake
Operation without pressure
c
LC8 G , L, E G and L and E f σ 1,2· f
max max exp c,all,test B,op
but with earthquake
P , G , L , P and G and L and Test with test pressure, test
test max test test max test
LC9 f σ f
test c,all,test B,op
W 0,6·W filling and wind
...