SIST EN 13480-3:2018/A2:2020

SLOVENSKI STANDARD
01-oktober-2020
Kovinski industrijski cevovodi - 3. del: Konstruiranje in izračun - Dopolnilo A2
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 13480-3:2017/A2:2020
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
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.

EN 13480-3:2017/A2
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2020
EUROPÄISCHE NORM
ICS 23.040.01
English Version
Metallic industrial piping - Part 3: Design and calculation
Tuyauteries industrielles métalliques - Partie 3 : Metallische industrielle Rohrleitungen - Teil 3:
Conception et calcul Konstruktion und Berechnung
This amendment A2 modifies the European Standard EN 13480-3:2017; it was approved by CEN on 12 July 2020.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13480-3:2017/A2:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Modification to 3.2, "Symbols and units" . 5
2 Modification to 4.2, "Loadings". 5
3 Modification to 4.3, "Thickness" . 5
4 Modification to 12.2.4.2, "Overstrained behaviour" . 6
5 Modification to 12.2.10.3, "Basic assumptions and requirements" . 6
6 Modification to 12.3, "Flexibility analysis" . 6
7 Modification to 12.3.2, "Stress due to sustained loads" . 8
8 Modification to 12.3.3, "Stress due to sustained and occasional or exceptional loads" . 9
9 Modification to 12.3.4, "Stress range due to thermal expansion and alternating loads" . 11
10 Modification to 12.3.5, "Additional conditions for the creep range" . 13
11 Modification to 12.3.6, "Stresses due to a single non-repeated support movement" . 13
12 Modification to 12.3.7, "Determination of resultant moments" . 14
13 Modification to 12.3.8, "Alternative method for stress calculation" . 16
14 Modification to 13.1.1, "General" . 16
15 Modification to 13.1.3.12, . 17
16 Modification to 13.1.3.13, "Pipe support manufacturer" . 17
17 Modification to 13.1.3.14, "Main structure designer" . 17
18 Modification to 13.1.3.16, "Occasional load" . 17
19 Modification to 13.2.1, "General" . 17
20 Modification to 13.2.2, "Detail design of pipe supports" . 17
21 Modification to 13.3.6, "Identification Marking/Name plate" . 18
22 Modification to 13.5, "Rigid struts" . 18
23 Modification to 13.6, "Shock arrestors, shock absorbers (snubbers)" . 18
24 Modification to 13.11, "Manufacturing of pipe supports" . 18
25 Modification to 13.11.2.1, "General" . 18
26 Modification to 13.11.4, "Determination of component sizes" . 18
27 Modification to 13.11.4.2, "Stress levels" . 18
28 Modification to 13.11.4.3, "Allowable stress" . 19
29 Modification to 13.11.5.4, "Fillet welds" . 19
30 Modification to 13.11.6.1, "Threaded connections" . 20
31 Modification to 13.11.9, "Design details for shock arrestors (shock absorbers,
snubbers)" . 20
32 Modification to Annex H, “Flexibility characteristics, flexibility and stress
intensification factors and section moduli of piping components and geometrical
discontinuities" . 20
33 Modification to Annex J, "Type testing of support components" . 32

European foreword
This document (EN 13480-3:2017/A2:2020) has been prepared by Technical Committee CEN/TC 267
“Industrial piping and pipelines”, the secretariat of which is held by AFNOR.
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 February 2021, and conflicting national standards
shall be withdrawn at the latest by February 2021.
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 standardization request 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 13480-3:2017.
This document includes the text of the amendment itself. The amended/corrected pages of
EN 13480-3:2017 will be published as Issue 4 of the European Standard.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
1 Modification to 3.2, "Symbols and units"
Table 3.2-1 shall be completed with the line e to be placed after e :
c n
e corroded thickness (see Figure 4.3–1 and Figure 4.3–2) mm
c
2 Modification to 4.2, "Loadings"
The second sentence of subclause 4.2.4.6 shall read as follows:
“The specification shall give details relating to the characteristics of the seismic conditions (design basis
earthquake and/or safe shut-down earthquake) to be taken into account.”
The last indent of 4.2.5.2.1 shall read as follows:
“— seismic conditions (Design Basis Earthquake).”
3 Modification to 4.3, "Thickness"
The new Figure 4.3-1 shall read as follows:

The key of Figure 4.3-1 shall be updated with the following correction and addition:
c is the thinning allowance for possible thinning during manufacturing process;
e is the wall thickness after corrosion or erosion used for flexibility analysis in Clause 12;
c
The new Figure 4.3-2 shall read as follows:

The key of Figure 4.3-2 shall be updated with the following correction and addition:
c is the thinning allowance for possible thinning during manufacturing process;
e is the wall thickness after corrosion or erosion used for flexibility analysis in chapter 12;
c
4 Modification to 12.2.4.2, "Overstrained behaviour"
The first indent shall read as follows:
— Where there is large deflection at the connecting point between two pipes with significantly
different cross section;
5 Modification to 12.2.10.3, "Basic assumptions and requirements"
The last paragraph of subclause 12.2.10.3.1 shall read as follows:
When friction forces are significant, they shall be considered in the piping design.
6 Modification to 12.3, "Flexibility analysis"
The revised Clause 12.3.1 shall read as follows:
“12.3.1 General
The following determination and limitation of stresses shall be used to ensure the safe operation of the
piping.
The Formulae (12.3.2-1) and (12.3.3-1) deal with the longitudinal stresses due to design and operating
loadings, and the Formulae (12.3.4-1) and (12.3.4-2) with the stress range due to such loadings that
gives rise to deformation of the total system.
In Formula (12.3.5-1), one-third of the stress resulting from thermal expansion and alternating loadings
are taken into consideration with respect to the material behaviour in the creep rupture stress range,
assuming that two-thirds will be relieved by relaxation.
Formula (12.3.6-1) ensures that in the event of a single non-repeated load, no strain occurs which can
adversely affect the material.
The forces and moments shall be determined for nominal thickness of the pipe e .
n
The longitudinal stresses for primary loads shall be determined based on the corroded thickness e .
c
The longitudinal stresses for thermal expansion and alternating loads shall be determined based on
nominal thickness e .
n
NOTE Wall thickness reductions, allowed by the technical conditions of delivery for seamless and welded
pipes are covered by the stress limits.
The stress intensification factors, i, i , i , are given in Tables H-1 to H-3 and are calculated based on
i o
nominal wall e .
n
4 4
π()dd−
oi
The sectional modulus of the nominal pipe is: Z=
32d
o
Unless specified otherwise, it is assumed that corrosion happens on the inside of the pipe so that the
inner diameter after corrosion is dd− 2e
io c
π(d −−(d 2e ))
o oc
and the sectional modulus of the corroded pipe is: Z =
c
32d
o
Using the alternative equations given in 12.3.2 to 12.3.6 with the corresponding stress intensification
factors in Table H-3, allow a more detailed determination of the stresses by considering independently
in-plane and out-of-plane moments .
For the general and the alternative route, the stress intensity factors, i, including the reduction factor
0,75, if defined, shall be greater than or equal to 1,0 (0,75 i ≥ 1,0). If a value less than 1 is obtained then
the value 1,0 shall be used.
If considerable corrosion/erosion is expected, it is taken into account in the flexibility analysis as
follows. In the Formulae (12.3.2-1), (12.3.2-2), (12.3.3-1), (12.3.3-2) and (12.3.4-2), using the sectional
modulus based on the corroded pipe.
Optionally the corrosion may be disregarded during flexibility design, if provisions are taken in order
that corrosion is detected during inspection. In this case Z and e shall be used instead of Z and e in
n c c
these equations.”
For most piping systems, the axial forces in the pipe are dominated by the internal pressure reaction
force. In special cases, such as buried pipes or pipes which are otherwise restrained in axial direction,
the axial stresses from external loads may be significant. In these cases, the axial force Q in
Formulae 12.3.2 to 12.3.6 allows taking into account these effects.
=
7 Modification to 12.3.2, "Stress due to sustained loads"
The revised Clause 12.3.2 shall read as fo
...