SIST EN 13480-3:2018/A1:2021

SLOVENSKI STANDARD
01-maj-2021
Kovinski industrijski cevovodi - 3. del: Konstruiranje in izračun - Dopolnilo A1
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/A1:2021
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/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
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 A1 modifies the European Standard EN 13480-3:2017; it was approved by CEN on 25 January 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13480-3:2017/A1:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Modifications to European foreword . 5
2 Modifications to Clause 2, Normative references . 5
3 Modifications to 3.2, Symbols and units . 5
4 Modifications to 4.2.3.4, Calculation pressure . 5
5 Modifications to 4.3, Thickness . 5
6 Modifications to 4.6, Dimensioning of piping components subject to pressure . 5
7 Modifications to 5.2.1, Steels other than austenitic steels . 6
8 Modifications to 5.2.4, Steels castings . 6
9 Modifications to 5.2.5.1, General . 6
10 Modifications to 5.3.2.1, Design conditions . 6
11 Modifications to 6.2, Pipe bends and elbows . 7
12 Modifications to 6.4.3, Specific symbols and abbreviations . 7
13 Modifications to 6.4.10, Special forged reducers . 8
14 Modifications to 6.5.2, Expansion joints . 8
15 Modifications to 6.6, Bolted flange connections . 8
16 Modifications to 6.6.4, Non-standard flange . 8
17 Modifications to 7.1, Dished ends. 8
18 Modifications to 7.1.3, Torispherical ends . 9
19 Modifications to 7.2, Circular flat ends . 9
20 Modifications to 7.2.3.3, Unflanged flat ends . 9
21 Modifications to 7.2.4.1, General . 9
22 Modifications to 7.2.5.2, Flat ends with openings . 10
23 Modifications to 8.4.1, General . 10
24 Modifications to 8.4.4, Reinforced single openings with 0,8 < d/D ≤ 1,0 . 10
25 Modifications to 8.5.2, Reinforced openings with d/D ≤ 0,8 . 10
26 Modifications to 8.6.1, Cylindrical Y-pieces . 11
27 Modifications to 10.3.2, Simplified fatigue analysis . 11
28 Modifications to 10.3.2.3, Determination of allowable number of load cycles . 11
29 Modifications to 10.4.2, Design guidance . 11
30 Modifications to 11.3, Symbols . 11
31 Modifications to 12.2.3, Displacement strains . 11
32 Modifications to 12.2.5, Stress range . 11
33 Modifications to 12.2.7.1, Thermal expansion data . 12
34 Modifications to 12.2.10.2, Formal analysis required . 12
35 Modifications to C.1.3, Design of expansion joints . 12
36 Modifications to D.4.1, Introduction . 12
37 Modifications to D.4.4, Flange construction . 12
38 Modifications to D.4.6, Gaskets . 12
39 Modifications to D.5.2, Bolt loads and areas . 12
40 Modifications to D.5.4.2, Stress limits . 13
41 Modifications to E.2.1, Angles and areas . 13
42 Modifications to F.2, Measures to be taken when the calculated fatigue life has been
reached . 13
43 Modifications to L.2, Symbols. 14
44 Modifications to L.4, Allowable compressive stress. 14
45 Modifications to Annex P, Recommended gaskets for industrial piping . 14
46 Modifications to Q.3, Explanatory notes for Table Q.1 . 14
47 Modifications to Bibliography . 14
Bibliography . 15

European foreword
This document (EN 13480-3:2017/A1:2021) 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 September 2021, and conflicting national standards shall
be withdrawn at the latest by September 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 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.
This document includes the text of the amendment itself. The amended/corrected pages of
EN 13480-3:2017 will be published as Issue 2 of the European Standard.
1 Modifications to European foreword
In the European foreword, 8th paragraph shall read as follows:
“This document is maintained by a working group (Maintenance Help Desk - MHD) whose scope of work
is limited to corrections and interpretations related to EN 13480.”.
2 Modifications to Clause 2, Normative references
In Clause 2, the following normative reference shall be added:
EN 764-5:2014, Pressure equipment - Part 5: Inspection documentation of metallic materials and
compliance with the material specification
In Clause 2, the following normative references shall be deleted:
EN 1591-1:2013, Flanges and their joints - Design rules for gasketed circular flange connections - Part 1:
Calculation
EN 1591-2:2008, Flanges and their joints — Design rules for gasketed circular flange connections — Part
2: Gasket parameters
3 Modifications to 3.2, Symbols and units
In Table 3.2-1, the following lines shall read as follows:
c corrosion or erosion allowance (see Figure 4.3–1 and Figure 4.3–2) mm
c absolute value of the negative tolerance taken from the material standard mm

(see Figure 4.3–1 and Figure 4.3–2)
c thinning allowance for possible thinning during manufacturing process mm
(see Figure 4.3–1 and Figure 4.3–2)
e analysis thickness of a component used for the check of the strength mm
a
(see Figure 4.3–1 and Figure 4.3–2)
e nominal thickness on drawings (see Figure 4.3–1 and Figure 4.3–2) mm
n
e ordered thickness (see Figure 4.3–1 and Figure 4.3–2) mm
ord
4 Modifications to 4.2.3.4, Calculation pressure
NOTE 2 in subclause 4.2.3.4 shall read as follows:
“NOTE 2 If there is a condition where pc = PS and tc =TS, only this condition needs to be calculated.”.
5 Modifications to 4.3, Thickness
In subclause 4.3, the order of the 3rd and 4th paragraphs shall be inverted.
6 Modifications to 4.6, Dimensioning of piping components subject to pressure
In subclause 4.6, 3rd paragraph shall read as follows:
“If the component under consideration is subjected to significant section moments resulting from
connected piping, the rules of 12.4 shall apply.”.
7 Modifications to 5.2.1, Steels other than austenitic steels
Subclause 5.2.1.2 shall read as follows:
“The designer shall ensure that the nominal design stress f under the proof test conditions, given in
test
EN 13480-5, does not exceed 95 % R or 95 % R at specified test temperature.”.
eH p0,2
8 Modifications to 5.2.4, Steels castings
Heading of subclause 5.2.4.2 shall read as follows:
“5.2.4.2 Test conditions”
9 Modifications to 5.2.5.1, General
The 1st sentence of 5.2.5.1 shall read as follows:
“Steels with no specific control are those possessing a test report 2.2 or a declaration of compliance with
the order type 2.1, in accordance with EN 10204:2004. They shall only be used as permitted in
EN 764-5:2014.”
10 Modifications to 5.3.2.1, Design conditions
Table 5.3.2-1 shall read as follows:
Table 5.3.2–1 — Safety factor as a function of mean creep rupture strength related to time
a) c)
Design lifetime Without surveillance of creep With surveillance of creep exhaustion
c)
exhaustion
Mechanical Mechanical
T [h] Sf Sf
cr cr
property property
10 000 ≤ T ≤ 100 000 S 1,5 S 1,25
R T t R T t
d) d)
100 000 < T < 200 000 S 1,5 S 1,25
R T t R T t
S 1,25
R 200 000 h t
d) d) b)
T = 200 000 S 1,5 S 1,35
R T t R 150 000 h t
b)
S 1,5
R 100 000 h t
a)
If the design lifetime is not specified, the mean creep rupture strength at 200 000 h shaII be used with the associated
Sf .
cr
b)
Only in cases where the 200 000 h values are not specified in the material standards, the mean creep rupture strength
at 150 000 h or 100 000 h shall be used for a design lifetime of 200 000 h with the associated Sfcr.
c)
Surveillance by means of non-destructive testing and/or additional calculations of creep damage, D .
c
S
R 200000ht
d)
Allowed only if ≥ 0,781 to ensure that 60 % of theoretical creep damage are not exceeded at 200 000 h.
S
R 100000ht
11 Modifications to 6.2, Pipe bends and elbows
In subclause 6.2, 1st paragraph shall read as follows:
“There are two methods for calculating the wall thickness of elbows as well as the wall thickness of pipe
bends (see 6.2.3.1 and 6.2.3.2). The chosen method shall be used in its entirety.”.
Table 6.2.2-1 shall read as follows:
Table 6.2.2–1 — Additional symbols for the purposes of 6.2
Symbol Description Unit
e minimum required thickness without allowances and tolerances for a bend on mm
int
the intrados
e minimum required thickness without allowances and tolerances for a bend on mm
ext
the extrados
R Bending radius of bend or elbow (center line) mm
12 Modifications to 6.4.3, Specific symbols and abbreviations
Table 6.4.3-1 shall read as follows:
Table 6.4.3–1 — Additional symbols for the purposes of 6.4
Symbol Description Unit
s
D the mean diameter of the cylinder at the junction with the cone mm
c
D the outside diameter of the cone mm
e
D the inside diameter of the cone mm
i
D a diameter given by Formula (6).4.4–7) mm
K
D the mean diameter of the cone mm
m
e required thickness of cone as determined in 6.4.4 mm
con
e required thickness of cylinder as determined in 6.1 mm
cyl
e a required or analysis thickness at a junction at the large end of a cone mm
j
e required thickness of cylinder at junction mm
e analysis reinforcing thickness in cylinder mm
1a
e required thickness of cone and knuckle at junction mm
e analysis reinforcing thickness in cone mm
2a
f the nominal design stress. In the design of junctions to 6.4.6 to 6.4.9 it is the MPa (N/mm )
lowest of values for the individual component parts

values for the individual component parts
l length along cylinder mm
l length along cone at large or small end mm
r inside radius of knuckle mm
i
α the semi angl
...