EN 13445-3:2002/A10:2008

SLOVENSKI STANDARD
01-junij-2008
1HRJUHYDQHWODþQHSRVRGHGHO.RQVWUXLUDQMH
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 13445-3:2002/A10:2008
ICS:
23.020.30
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 13445-3:2002/A10
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2008
ICS 23.020.30
English Version
Unfired pressure vessels - Part 3: Design
Récipients sous pression non soumis à la flamme - Partie Unbefeuerte Druckbehälter - Teil 3: Konstruktion
3: Conception
This amendment A10 modifies the European Standard EN 13445-3:2002; it was approved by CEN on 27 November 2006.
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
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13445-3:2002/A10:2008: E
worldwide for CEN national Members.

EN 13445-3:2002/A10:2007 (E)
Contents Page
Foreword.3
Annex GA (informative) Alternative design rules for flanges and gasketed flange connections.4
GA.1 Purpose.4
GA.2 Specific definitions.4
GA.3 Specific symbols and abbreviations .5
GA.3.1 Use of figures (General) .5
GA.3.2 Subscripts .5
GA.3.3 Symbols.6
GA.4 General.22
GA.4.1 Conditions of applicability.22
GA.4.2 Mechanical model.23
GA.4.3 Calculation method.24
GA.5 Parameters.24
GA.5.0 General.24
GA.5.1 Flange parameters.25
GA.5.2 Bolt and washers parameters.28
GA.5.3 Gasket parameters.29
GA.5.4 Lever arms.32
GA.6 Forces.33
GA.6.0 General.33
GA.6.1 Loads .33
GA.6.2 Compliance of the joint .34
GA.6.3 Elastic deformations .34
GA.6.4 Actual gasket forces.35
GA.6.5 Required gasket force .35
GA.6.6 Forces in assembly condition (ΙΙΙΙ = 0) .37
GA.6.7 Forces in subsequent conditions (ΙΙ = 1, 2, 3 …).38
ΙΙ
GA.7 Load limits.38
GA.7.0 General.38
GA.7.1 Bolts.39
GA.7.2 Bolt load contact pressure and washers .39
GA.7.3 Gasket.41
GA.7.4 Integral flange, stub or collar .42
GA.7.5 Blind flange .43
GA.7.6 Loose flange with stub or collar.44
GA.8 Supplements to the method .45
GA.8.1 Dimensions of standard metric bolts .45
GA.8.2 Bolting-up methods.46
GA.8.3 Flange rotations.47
GA.9 Gasket properties.48
GA.9.1 Basic explanations .48
GA.9.2 Tables for gasket properties.51
GA.10 Bibliography.63

EN 13445-3:2002/A10:2007 (E)
Foreword
This document (EN 13445-3:2002/A10:2008) 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 September 2008, and conflicting
national standards shall be withdrawn at the latest by September 2008.
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 97/23/EC.
For relationship with EU Directive 97/23/EC, see informative Annex ZA, which is an integral part of this
document.
The document includes the text of the amendment itself. The corrected pages of EN 13445-3 will be delivered
as issue 30 of the standard.
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.

Add the following Annex GA:
EN 13445-3:2002/A10:2007 (E)
Annex GA
(informative)
Alternative design rules for flanges and gasketed flange connections
GA.1 Purpose
This annex provides a calculation method for bolted, gasketed circular flange joints. It is applicable to flanges
and bolted domed ends, and it is an alternative to the methods in Clauses 11 and 12.
Its purpose is to ensure structural integrity and leak tightness for an assembly comprising two flanges, bolts
and a gasket. Flange loadings are shown in Figure GA.3-1. Different types of bolts and gaskets are shown in
Figures GA.3-2 to GA.3-3.
This annex does not consider bolted tubesheet flange connections with two gaskets and/or two different fluid
pressures. It also does not consider flange joints with integral tubesheet-flange-connections and such with two
shells connected to a flange (jacketed vessels or pipes).
NOTE This informative Annex is a further development of the Alternative method contained in Annex G. It may be
used particularly in the case of bolted flanged connections of vessels containing gases or vapours, for which it is
necessary to fix a maximum allowable leak rate in order to protect the environment. The gasket factors contained in
Tables GA.9.1 to GA.9.6 are partially based on research results, and partially on theoretical considerations. Use of such
factors should be made with caution, with the agreement - whenever possible - of the gasket manufacturer concerned.
GA.2 Specific definitions
The following terms and definitions apply in addition to those in 11.2.
GA.2.1
integral flange
flange either integral with or welded to the shell, see Figures GA.3-4 to GA.3-8
GA.2.2
blind flange
flat closure connected by bolts, see Figure GA.3-9
GA.2.3
loose flange
separate flange-ring abutting a stub or collar, see Figure GA.3-10
GA.2.4
hub
axial extension of a flange-ring, usual connecting flange-ring to shell, see Figures GA.3-4 and GA.3-5
GA.2.5
collar or stub
abutment for a loose flange, see Figure GA.3-10
GA.2.6
load condition
application of a set of applied simultaneous loads; designated by the identifier Ι
EN 13445-3:2002/A10:2007 (E)
GA.2.7
load change
change of load condition
GA.2.8
assembly condition
as defined in 11.2 and designated by Ι = 0 in this annex
GA.2.9
subsequent condition
load condition subsequent to the assembly condition, e.g. working condition, test condition, conditions arising
during start-up and shut-down, designated by Ι = 1, 2, 3…
GA.2.10
external loads
forces and/or moments applied to the joint by attached equipment, e.g. weight or thermal expansion of pipes
GA.2.11
compliance
inverse of the stiffness of the assembly, symbol Y, units mm/N
GA.2.12
flexibility modulus
inverse of the stiffness modulus of a component, excluding the elastic constants of the material; axial; symbol
X, units 1/mm; rotational: symbol Z; units 1/mm
GA.3 Specific symbols and abbreviations
GA.3.1 Use of figures (General)
Figures GA.3-1 to GA.3-10 serve only to illustrate the notation. They are not intended to give all the detail of
different designs. They do not illustrate all possible flange types for which the method is valid.
GA.3.2 Subscripts
Subscripts to indicate parts are always large (uppercase). Subscripts to indicate properties (behaviour) may
be small (lowercase). Subscripts written in brackets (Ι and/or J) may be waived.
A for Assembly load condition, Additional (F , M )
A A
B for Bolt
C for Contact (bolt/nut/washer/flange)
E for Equivalent or effective values (cylinder, gasket pressure)
F for Flange
G for Gasket
H for Hub
for
Ι Load condition identifier, written in brackets, (Ι = 0, 1, 2, 3 …)
J for Identification for parts of the one or other side of the flange connection, or for
cases to determine tightness parameters, written in bracket, (J = 1 or 2)
L for Loose flange, Loading
M for Moment
EN 13445-3:2002/A10:2007 (E)
P for Pressure (fluid pressure)
Q for Net axial force due to pressure
R for Net axial force due to external loads (Resultant)
S for Shell, Shaft, Shear, Sub
...