EN 13480-3:2002/A2:2006
(Amendment)Metallic industrial piping - Part 3: Design and calculation
Metallic industrial piping - Part 3: Design and calculation
Application of the design rules for gasketted circular flanges connections (according to EN 1591)
Metallische industrielle Rohrleitungen - Teil 3: Konstruktion und Berechnung
Tuyauteries industrielles métalliques - Partie 3: Conception et calcul
Kovinski industrijski cevovodi – 3. del: Konstruiranje in izračun
Ta del standarda EN 13480 opisuje zahteve za konstruiranje in izračun industrijskih kovinskih cevnih sistemov, vključno s podporami.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2007
.RYLQVNLLQGXVWULMVNLFHYRYRGL±GHO .RQVWUXLUDQMHLQL]UDþXQ
Metallic industrial piping - Part 3: Design and calculation
Metallische industrielle Rohrleitungen - Teil 3: Konstruktion und Berechnung
Tuyauteries industrielles métalliques - Partie 3: Conception et calcul
Ta slovenski standard je istoveten z: EN 13480-3:2002/A2:2006
ICS:
77.140.75 Jeklene cevi in cevni profili Steel pipes and tubes for
za posebne namene specific use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 13480-3:2002/A2
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2006
ICS 23.040.01
English Version
Metallic industrial piping - Part 3: Design and calculation
Tuyauteries industrielles métalliques - Partie 3: Conception Metallische industrielle Rohrleitungen - Teil 3: Konstruktion
et calcul und Berechnung
This amendment A2 modifies the European Standard EN 13480-3:2002; it was approved by CEN on 25 September 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, 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
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13480-3:2002/A2:2006: E
worldwide for CEN national Members.
Contents Page
Foreword.3
2 Normative references .4
6.6 Bolted flange connections.4
D.1 Purpose.5
D.4.1 Introduction.5
Annex P (informative) Bolted flange connections – Application of EN 1591.6
P.1 Introduction.6
P.2 Scope .7
P.2.1 General.7
P.2.2 Materials .7
P.2.3 Loadings .7
P.2.4 Assumptions .7
P.3 Application of EN 1591.8
P.3.1 Calculations.8
P.3.2 Gasket coefficients.8
P.3.3 Tightening.9
Bibliography .68
Foreword
This document (EN 13480-3:2002/A2:2006) has been prepared by Technical Committee CEN/TC 267
“Industrial piping and pipelines”, the secretariat of which is held by AFNOR.
This Amendment to the European Standard EN 13480-3:2002 shall be given the status of a national standard,
either by publication of an identical text or by endorsement, at the latest by May 2007, and conflicting national
standards shall be withdrawn at the latest by May 2007.
This document amends Clauses 2, 6.6, 13.3.3.9, D.1 and D.4.1 of EN 13480-3:2002.
This document contains informative Annex P to be added to EN 13480-3:2002.
This document includes the text of the amendment itself. The corrected pages of EN 13480-3 are delivered as
Issue 8 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, 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.
2 Normative references
Add the date of publication for the following references to read the following:
EN 287-1:2004, Qualification test of welders — Fusion welding — Part 1: Steels
EN 1591-1:2001, Flanges and their joints — Design rules for gasketed circular flange connections — Part 1:
Calculation method
EN 12953-3:2002, Shell boilers — Part 3: Design and calculation for pressure parts EN 13480-1:2002,
Metallic industrial piping — Part 1: General
EN 13480-1:2002, Metallic industrial piping — Part 1: General
EN 13480-2:2002, Metallic industrial piping — Part 2: Materials
Add the following references:
EN 288 (all parts), Specification and approval of welding procedures for metallic materials
ENV 1591-2:2001, Flanges and their joints — Design rules for gasketed circular flange connections — Part 2:
Gasket parameters
Replace 6.6 of EN 13480-3:2002 with the following:
6.6 Bolted flange connections
The design of flanges other than flat face flanges shall be performed in accordance with the following:
if a standard flange is specified in a European Standard, and no further requirement is given, the flange
shall be selected by means of the P/T rating;
— if a non-standard flange is used, the design shall be done by applying the calculation method in
EN 1591-1, using for example Annex P, or by applying the algorithm shown in the Taylor-Forge method.
If there is a specific requirement on tightness for the flange connection, this shall be calculated in accordance
with EN 1591-1, using Annex P.
Allowable stresses for bolts shall be in accordance with Annex D.
The designer shall consider section loadings caused by the connected piping system.
NOTE 1 The Taylor-Forge method does not ensure tightness.
NOTE 2 The algorithm given in EN 1591-1 includes a consideration of section loadings.
NOTE 3 The bolt torque should be specified by the designer.
NOTE 4 Attention should be paid in such cases to the method of tightening. Guidance of scatter band when applying
the different methods of tightening are given in EN 1591-1.
Replace 13.3.3.9 of EN 13480-3:2002 with the following:
13.3.3.9 The dimensioning of intermediate or secondary steelwork supplied for supporting the pipe shall be
based on good industrial practice as defined in ENV 1993.
Replace D.1 of EN 13480-3:2002 with the following:
D.1 Purpose
This annex gives requirements for the design of circular bolted flange connections. Flanges with full face and
narrow face gaskets, subject to internal and external pressure are included, as are reverse flanges and seal
welded flanges. The requirements provided in this clause are based on the well established Taylor Forge rules.
Replace D.4.1 of EN 13480-3:2002 by the following:
D.4.1 Introduction
Circular bolted flanged connections, either sealed with a gasket or seal welded, used in the construction of
vessels to this European Standard shall conform to either:
an appropriate European Standard for pipework flanges, and the requirements of D.4.2, or
the requirements for bolted flanged connections specified in this clause.
Alternative rules for bolted flanges connections are given in Annex P.
Both flanges of a mating pair shall be designed to the same standard or set of requirements. This applies
when one of the pair is a bolted flat end or cover. The requirements for bolted flat ends in Clause 10 and
bolted domed ends in Clause 12 are considered part of the same set of requirements as this clause.
Annex P
(informative)
Bolted flange connections – Application of EN 1591
P.1 Introduction
According to EN 13480-3, two methods may be used to check bolted connections:
the Taylor Forge method and
the procedure detailed in EN 1591-1 and ENV 1591-2.
However, the proper application of this European Standard to bolted connections in the field of piping requires
additional explanations.
The following two parts of European Standard EN 1591, based on German developments, define an analytical
procedure for the design of bolted flange connections with gasket:
EN 1591-1, Flanges and their joints — Design rules for gasketed circular flange connections —
Part 1: Calculation method;
ENV 1591-2, Flanges and their joints — Design rules for gasketed circular flange connections —
Part 2: Gasket parameters.
This procedure allows the verification of the connection taking account of strength criteria and tightness
criteria.
The parameters taken into account are as follows:
fluid pressure;
mechanical strength of flange, bolting and gasket;
gasket coefficients;
bolt nominal loads
and, other than the Taylor-Forge method (see EN 13480-3:2002, 6.6), the following additional factors:
operating conditions and specifically creep/relaxation behaviour;
dispersions due to initial tightening where relevant;
variations of gasket loading due to the deformation of the different components of the connection;
effects of the connected shell or piping;
effects of external axial forces and moments;
effects of temperature difference between bolts and flanges.
P.2 Scope
P.2.1 General
This procedure shall apply to the following arrangements:
two circular flanges (identical or different);
four identical bolts, as a minimum, regularly spaced;
a circular gasket entirely within the circle enclosed by the bolt holes.
The procedure does not apply to metal-metal connections.
P.2.2 Materials
Bolt and flange materials shall conform to the requirements of EN 13480-2 regarding ductility properties.
Where these requirements are not fulfilled, lower nominal design stress shall be used.
P.2.3 Loadings
The following loadings are taken into account in this procedure:
internal and external fluid pressure;
external loads: axial forces and bending moments (equivalent axial load);
thermal expansion of flanges, bolts and gasket.
P.2.4 Assumptions
P.2.4.1 The deformations of the cross-section of the plate are not taken into account. Only the rotation of
the cross-section is considered.
P.2.4.2 The plate of an integral flange is connected to a cylindrical shell or to an equivalent cylindrical
shell (conical or spherical shell).
P.2.4.3 The effective width b of contact between the gasket and the flanges may be less than the
Ge
actual width of the gasket. This effective width shall be calculated for seating condition and considered as
constant for all other conditions.
P.2.4.4 The modulus of elasticity E of the gasket is a function of the applied compressive stress.
G
P.2.4.5 Creep behaviour of the gasket is taken into account using the factor P .
QR
P.2.4.6 The thermal and mechanical deformations of flanges, bolts and gasket are considered.
P.2.4.7 External moments are taken into account as equivalent axial bolt loads.
P.2.4.8 Transitions between a condition to another lead to variations of bolt and gasket loads.
P.2.4.9 Acceptance of component loadings is based on limit analysis which covers failure by gross plastic
deformation.
P.2.4.10 The following is not taken into account or covered by the procedure:
bending stiffness of bolts;
creep of flanges and bolts except through nominal design stress and thermal expansion factors;
external torsion moments and external shear loads.
P.3 Application of EN 1591
P.3.1 Calculations
The minimum tightening load for the required tightening of bolts shall be calculated by successive iterations.
Internal loads due to initial tightening shall be calculated for each condition (initial tightening, proof test
condition and operating conditions) and combined with external loads.
Safety factors shall be those defined by EN 13480-3:2002, Clause 5. However for seating con
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