EN 13445-3:2002/A2:2007

SLOVENSKI STANDARD
01-februar-2009
1HRJUHYDQHWODþQHSRVRGHGHO.RQVWUXLUDQMH
Unfired pressure vessels - Part 3: Design
Unbefeuerte Druckbehälter - Teil 3: Konstruktion
Récipients sous pression non soumis a la flamme - Partie 3 : Conception
Ta slovenski standard je istoveten z: EN 13445-3:2002/A2:2007
ICS:
23.020.30 7ODþQHSRVRGHSOLQVNH Pressure vessels, gas
MHNOHQNH cylinders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 13445-3:2002/A2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2007
ICS 23.020.30
English Version
Unfired pressure vessels - Part 3: Design
Récipients sous pression non soumis à la flamme - Partie 3 Unbefeuerte Druckbehälter - Teil 3: Konstruktion
: Conception
This amendment A2 modifies the European Standard EN 13445-3:2002; it was approved by CEN on 26 January 2007.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13445-3:2002/A2:2007: E
worldwide for CEN national Members.

Contents Page
Foreword.3
2 Normative references .4
18 Detailed assessment of fatigue life.4
18.10.3 Unclassified details .4
20 Design by experimental methods .5
20.1 Purpose.5
20.2 Specific definitions.5
20.3 Specific symbols and abbreviations .6
20.4 General requirements.7
20.4.1 Experimental methods without any calculation .7
20.4.2 Experimental methods and other design methods.8
20.4.3 Test programme.8
20.4.4 Requirements for a vessel or part for burst test .8
20.4.5 Requirements for a vessel or part for fatigue test .8
20.4.6 Test medium.8
20.4.7 Safety .9
20.4.8 Non-destructive testing of welded joints .9
20.4.9 Final assessment.9
20.5 Methods .9
20.5.1 Methods for pressure loading of predominantly non-cyclic nature.9
20.5.2 Methods for pressure loading of predominantly cyclic nature and fatigue tests.10
20.6 Test specifications.11
20.6.1 Burst test of Method A .11
20.6.2 Burst test and global deformation control for Method B and Method C.15
20.6.3 Fatigue test in conjunction with Methods B or C, design by formulae or design by
analysis.16
20.7 Duplicate or similar parts.17
20.7.1 General.17
20.7.2 Duplicate parts.17
20.7.3 Similar parts .18
20.8 Bibliography.18
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 97/23/EC .19

Foreword
This document (EN 13445-3:2002/A2:2007) has been prepared by Technical Committee CEN/TC 54 “Unfired
pressure vessels”, the secretariat of which is held by BSI.
This Amendment to the European Standard EN 13445-3:2002 shall be given the status of a national standard,
either by publication of an identical text or by endorsement, at the latest by October 2007, and conflicting
national standards shall be withdrawn at the latest by October 2007.
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 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 this document.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
This amendment is based on EN 13445-3:2002 up to issue 16 (October 2005).
The document includes the text of the amendment itself. The corrected pages of EN 13445-3 and EN 13445-5
will be delivered as issue 25 of the standard.
2 Normative references
In Clause 2, insert:
EN 837-1, Pressure gauges – Part 1: Bourdon tube pressure gauges - Dimensions, metrology, requirements
and testing
EN 837-3, Pressure gauges –Part 3: Diaphragm and capsule pressure gauges - Dimensions, metrology,
requirements and testing
18 Detailed assessment of fatigue life
In Clause 18, replace 18.10.3 with:
18.10.3 Unclassified details
Details not fully covered in Tables 18-4 and Annex P shall be treated as Class 32 unless superior resistance
to fatigue is proved by special tests or reference to relevant fatigue test results. To justify a particular design
∆σ -N curve, at least two tests shall be performed on specimens that are representative of the design,
R
manufacture and quality of the relevant detail in the actual vessel. Test stress levels shall be chosen to result
in lives no more than 2 x 10 cycles. The geometric mean fatigue life obtained from the tests at a particular
stress range shall be not less than that from the ∆σ -N curve at that stress range multiplied by the factor F
R
from Table 18-6.
Table 18-6 — Values of the factor F
Number of tests F
2 15,1
3 13,1
4 12,1
5 11,4
6 11,0
7 10,6
8 10,3
9 10,1
10 9,9
NOTE F is based on assumed standard deviation of logN of 0,283, the largest value found from fatigue tests of
pressure vessels failing from a weld detail. If a lower value is known to be applicable, it may be applied in conjunction with
the test factors presented in 20.6.3.
Add the new Clause 20 as follows:
20 Design by experimental methods
20.1 Purpose
The purpose of this clause is to validate the design of vessels or vessel parts against pressure loading by
experimental methods. These are based on burst testing supplemented, if necessary, by other tests, i.e.
control of deformation and fatigue tests. The design is characterised by the determination of the maximum
allowable pressure P of the vessel or of the vessel part. Note that validation of the design of a vessel part
s
does not validate the design of the whole vessel.
Experimental methods are applicable to vessels made of steels according to EN 13445-2, manufactured
according to EN 13445-4, inspected and tested according to EN13445-5 and to vessels made of aluminium
and aluminium alloys according to EN 13445-8 with limitations (See 20.5.1).
In the present edition of the standard, the application of this clause is limited to the design of vessels having a
maximum allowable temperature at which creep effects may be ignored.
The experimental methods of this clause are not applicable for bellows.
NOTE For cast parts made of spheroidal graphite cast iron, see EN 13445-6.
20.2 Specific definitions
burst test
hydrotest in which the pressure is increased up to a pre-determined pressure which is anticipated as being the
burst pressure
burst test with global deformation control
hydrotest in which pressure is recorded versus volume variation
fatigue test
cyclic pressure test according to this clause
20.3 Specific symbols and abbreviations
The following symbols shall apply.
Table 20.3-1 Symbols
Symbol Quantity Unit
c corrosion or erosion thickness allowance mm
analysis thickness mm
e
a
actual thickness mm
e
act
nominal thickness mm
e
n
minimum possible fabrication thickness mm
e
min
nominal design stress for normal operating load MPa or N/mm²
f
t
cases at design temperature
f nominal design stress for normal operating load MPa or N/mm²
t
test
cases at test temperature
fatigue factor related to 99,8 % survival dimensionless
F
one-sided tolerance limit factor (see 20.6.3.2.) dimensionless
k
number of tests dimensionless
n
factor depending on shape of the shell dimensionless
n
s
N number of pressure cycles dimensionless
required number of pressure cycles dimensionless
N
req
Geometric mean number of cycles dimensionless
N
c,gm
required burst pressure for a tested vessel or part bar, MPa or N/mm
P
B,req
maximum allowable pressure bar, MPa or N/mm
P
s
maximum pressure actually applied in burst test bar, MPa or N/mm²
P
B,act
Limit pressure bar, MPa or N/mm²
P
lim
minimum pressure provided by the installation bar, MPa or N/mm²
P
min
Symbol Quantity Unit
average tensile strength of 3 specimens from the MPa or N/mm²
R
m,avg
same heat
average tensile strength of 3 test specimens taken MPa or N/mm²
R
m(3)
from the part after the test is completed
minimum yield strength or 0,2 % proof strength at MPa or N/mm²
R
p0,2
test temperature, as given in the technical
specification for the material
dimensionless
SF safety factor used to determine P
s
volume of the vessel mm
V
energy of elastic deformation
W N⋅m or J
e
energy of plastic deformation
W N⋅m or J
p
absolute value of the possible negative tolerance mm
δ
e
on the nominal thickness (e.g. taken from the
material standards)
σ
standard deviation of logN dimensionless
pressure range in the fatigue test bar, MPa or N/mm²
∆P
volume variation mm
∆V
elastic part of the volume variation mm
∆V
e
NOTE 1 Table 20.3-1 contains all the notations used in the clause.
NOTE 2 For more information regarding thicknesses, see Clause 5.
NOTE 3 For more information regarding nominal design stresses, see Clause 6.
20.4 General requirements
20.4.1 Experimental methods without any calculation
a) Experimental methods
...