SIST EN 13480-2:2024

SLOVENSKI STANDARD
01-december-2024
Nadomešča:
SIST EN 13480-2:2018
SIST EN 13480-2:2018/A1:2018
SIST EN 13480-2:2018/A2:2018
SIST EN 13480-2:2018/A3:2018
SIST EN 13480-2:2018/A7:2020
SIST EN 13480-2:2018/A8:2021
Kovinski industrijski cevovodi - 2. del: Materiali
Metallic industrial piping - Part 2: Materials
Metallische industrielle Rohrleitungen - Teil 2: Werkstoffe
Tuyauteries industrielles métalliques - Partie 2: Matériaux
Ta slovenski standard je istoveten z: EN 13480-2:2024
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 13480-2
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2024
EUROPÄISCHE NORM
ICS 23.040.01 Supersedes EN 13480-2:2017
English Version
Metallic industrial piping - Part 2: Materials
Tuyauteries industrielles métalliques - Partie 2: Metallische industrielle Rohrleitungen - Teil 2:
Matériaux Werkstoffe
This European Standard was approved by CEN on 9 July 2024.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a 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 European Standard 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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13480-2:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions, symbols and units . 9
4 Requirements for materials to be used for pressure containing parts in industrial piping . 11
5 Requirements for materials to be used for non-pressure parts . 15
Annex A (normative) Grouping system for steels for pressure equipment . 16
Annex B (normative) Requirements for prevention of brittle fracture at low temperatures . 18
B.1 General . 18
B.2 Material selection and impact energy requirements . 19
B.2.1 General . 19
B.2.2 Method 1 – Code of practice . 19
B.2.3 Method 2 . 28
B.2.4 Method 3 — Fracture mechanics analysis . 40
B.3 General test requirements . 41
B.3.1 General . 41
B.3.2 Sub-sized specimens . 42
B.4 Welds . 43
B.4.1 General . 43
B.4.2 Welding procedure qualification . 43
B.4.3 Production test plates . 43
B.5 Materials for use at elevated temperatures . 43
B.5.1 General . 43
B.5.2 Materials . 43
B.5.3 Welding procedure qualification and production test plates . 43
B.5.4 Start up and shut down procedure . 44
B.5.5 Pressure test . 44
Annex C (normative) Provisional technical delivery conditions for clad products for pressure
purposes . 52
C.1 Introduction . 52
C.2 Requirements for the base material . 52
C.3 Requirements for the cladding material . 52
C.4 Qualification of the cladding procedure . 53
C.5 Production tests . 54
Annex D (informative) European steels for pressure purposes . 56
D.1 European Standards for steels and steel components for pressure purposes . 56
D.2 European standardised steels grouped according to product forms . 57
Annex E (normative) Special provisions for materials and components . 80
E.1 General . 80
E.2 Mechanical properties and technical delivery conditions for fasteners in accordance with
EN ISO 3506-1:2020 and/or EN ISO 3506-2:2020 . 80
E.2.1 Mechanical properties for austenitic bolts in accordance with EN ISO 3506-1:2020 . 80
E.2.2 Delivery conditions for austenitic bolts . 80
Annex Y (informative) History of EN 13480-2 . 82
Y.1 Differences between EN 13480-2:2017 and EN 13480-2:2024 . 82
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/68/EU aimed to be covered . 83
Bibliography . 84

European foreword
This document (EN 13480-2:2024) 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 December 2024, and conflicting national standards shall be withdrawn
at the latest by December 2024.
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 supersedes EN 13480-2:2017.
This new edition incorporates the Amendments which have been approved previously by CEN members, and
the corrected pages up to Issue 3 without any further technical change. Annex Y provides details of significant
technical changes between this European Standard and the previous edition.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this document.
This European Standard EN 13480 for metallic industrial piping consists of eight interdependent and not
dissociable Parts which are:
— Part 1: General;
— Part 2: Materials;
— Part 3: Design and calculation;
— Part 4: Fabrication and installation;
— Part 5: Inspection and testing;
— Part 6: Additional requirements for buried piping;
— CEN/TR 13480-7, Guidance on the use of conformity assessment procedures;
— Part 8: Additional requirements for aluminium and aluminium alloy piping.
Although these Parts may be obtained separately, it should be recognized that the Parts are inter-dependant.
As such the manufacture of metallic industrial piping requires the application of all the relevant Parts in order
for the requirements of the Standard to be satisfactorily fulfilled.
This European Standard will be maintained by a Maintenance MHD working group whose scope of working is
limited to corrections and interpretations related to EN 13480. The contact to submit queries can be found at
https://unm.fr/en/maintenance-agencies/maintenance-agency-en-13480/. A form for submitting questions
can be downloaded from the link to the MHD website. After subject experts have agreed an answer, the answer
will be communicated to the questioner. Interpretation sheets will be posted on the website of the MHD.
Amendments to this new edition may be issued from time to time and then used immediately as alternatives
to rules contained herein. These amendments will be consolidated within EN 13480:2024 in accordance with
the maintenance system of EN 13480 series approved by CEN/BT Decision C172/2021.
Any feedback and questions on this document should be directed to the users’ national standards body. A
complete listing of these bodies can be found on the CEN website.
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, 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, Türkiye and the United Kingdom.
1 Scope
This document specifies the requirements for steel products used for industrial piping and supports.
For some metallic materials other than steel, such as spheroidal graphite cast iron, aluminium, nickel, copper,
titanium, requirements are or will be formulated in separate parts of this document.
For metallic materials which are not covered by a harmonized material standard and are not likely to be in
near future, specific rules are given in this part or the above cited parts of this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 764-1:2015+A1:2016, Pressure equipment — Part 1: Vocabulary
EN 1092-1:2018, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 1515-4:2021, Flanges and their joints — Bolting — Part 4: Selection of bolting for equipment subject to the
Pressure Equipment Directive 2014/68/EU
EN 1591-1:2013, Flanges and their joints — Design rules for gasketed circular flange connections — Part 1:
Calculation
EN 10028-1:2017, Flat products made of steels for pressure purposes — Part 1: General requirements
EN 10028-2:2017, Flat products made of steels for pressure purposes — Part 2: Non-alloy and alloy steels with
specified elevated temperature properties
EN 10028-3:2017, Flat products made of steels for pressure purposes — Part 3: Weldable fine grain steels,
normalized
EN 10028-4:2017, Flat products made of steels for pressure purposes — Part 4: Nickel alloy steels with specified
low temperature properties
EN 10028-5:2017, Flat products made of steels for pressure purposes — Part 5: Weldable fine grain steels,
thermomechanically rolled
EN 10028-6:2017, Flat products made of steels for pressure purposes — Part 6: Weldable fine grain steels,
quenched and tempered
EN 10028-7:2016, Flat products made of steels for pressure purposes — Part 7: Stainless steels
EN 10204:2004, Metallic products — Types of inspection documents
EN 10213:2007+A1:2016, Steel castings for pressure purposes
EN 10216-1:2013, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 1: Non-
alloy steel tubes with specified room temperature properties
EN 10216-2:2013+A1:2019, Seamless steel tubes for pressure purposes — Technical delivery conditions —
Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10216-3:2013, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 3: Alloy
fine grain steel tubes
EN 10216-4:2013, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 4: Non-
alloy and alloy steel tubes with specified low temperature properties
EN 10216-5:2021, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 5:
Stainless steel tubes
EN 10217-1:2019, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 1: Electric
welded and submerged arc welded non-alloy steel tubes with specified room temperature properties
EN 10217-2:2019, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 2: Electric
welded non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10217-3:2019, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 3: Electric
welded and submerged arc welded alloy fine grain steel tubes with specified room, elevated and low temperature
properties
EN 10217-4:2019, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 4: Electric
welded non-alloy steel tubes with specified low temperature properties
EN 10217-5:2019, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 5: Sub-
merged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10217-6:2019, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 6: Sub-
merged arc welded non-alloy steel tubes with specified low temperature properties
EN 10217-7:2021, Welded steel tubes for pressure purposes — Technical delivery conditions – Part 7: Stainless
steel tubes
EN 10222-1:2017, Steel forgings for pressure purposes — Part 1: General requirements for open die forgings
EN 10222-2:2017+A1:2021, Steel forgings for pressure purposes — Part 2: Ferritic and martensitic steels with
specified elevated temperature properties
EN 10222-3:2017, Steel forgings for pressure purposes — Part 3: Nickel steels with specified low temperature
properties
EN 10222-4:2017+A1:2021, Steel forgings for pressure purposes — Part 4: Weldable fine grain steels with high
proof strength
EN 10222-5:2017, Steel forgings for pressure purposes — Part 5: Martensitic, austenitic and austenitic-ferritic
stainless steels
EN 10253-2:2021, Butt-welding pipe fittings — Part 2: Non alloy and ferritic alloy steels with specific inspection
requirements
EN 10253-4:2008, Butt-welding pipe fittings — Part 4: wrought austenitic and austenitic-ferritic (duplex)
stainless steels with specific inspection requirements
EN 10269:2013, Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
EN 10272:2016, Stainless steel bars for pressure purposes
EN 10273:2016, Hot rolled weldable steel bars for pressure purposes with specified elevated temperature
properties
EN 12074:2000, Welding consumables — Quality requirements for manufacture, supply and distribution of
consumables for welding and allied processes
EN 13445-2:2021, Unfired pressure vessels — Part 2: Materials
EN 13445-3:2021, Unfired pressure vessels — Part 3: Design
EN 13445-4:2021, Unfired pressure vessels — Part 4: Fabrication
EN 13445-5:2021, Unfired pressure vessels — Part 5: Inspection and testing
EN 13479:2017, Welding consumables — General product standard for filler metals and fluxes for fusion welding
of metallic materials
EN 13480-1:2024, Metallic industrial piping — Part 1: General
EN 13480-3:2024, Metallic industrial piping — Part 3: Design and calculation
EN 13480-4:2024, Metallic industrial piping — Part 4: Fabrication and installation
EN ISO 148-1:2016, Metallic materials — Charpy pendulum impact test — Part 1: Test method
(ISO 148-1:2016)
EN ISO 898-1:2013, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts,
screws and studs with specified property classes — Coarse thread and fine pitch thread
(ISO 898-1:2013)
EN ISO 898-2:2012, Mechanical properties of fasteners — Part 2: Nuts with specified proof load values — Coarse
thread (ISO 898-2:2012)
EN ISO 2566-1:2021, Steel — Conversion of elongation values — Part 1: Carbon and low alloy steels
(ISO 2566-1:2021)
EN ISO 2566-2:2021, Steel — Conversion of elongation values — Part 2: Austenitic steels
(ISO 2566-2:2021)
EN ISO 3269:2019, Fasteners — Acceptance inspection (ISO 3269:2019)
EN ISO 3506-1:2020, Fasteners — Mechanical properties of corrosion-resistant stainless steel fasteners — Part
1: Bolts, screws and studs with specified grades and property classes (ISO 3506-1:2020)
EN ISO 3506-2:2020, Fasteners — Mechanical properties of corrosion-resistant stainless steel fasteners — Part
2: Nuts with specified grades and property classes (ISO 3506-2:2020)
EN ISO 16426:2002, Fasteners — Quality assurance system (ISO 16426:2002)
CEN ISO/TR 15608:2017, Welding — Guidelines for a metallic materials grouping system (ISO/TR 15608:2017)
3 Terms and definitions, symbols and units
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13480-1:2024,
EN 764-1:2015+A1:2016 and the following apply.
3.1.1
minimum metal temperature T
M
lowest temperature determined for any of the following conditions:
— normal operations;
— start up and shut down procedures;
— possible process upsets, such as flashings of fluid, which have an atmospheric boiling point below
0 °C;
— during pressure or leak testing.
Note to entry See also 3.1.2 and 3.1.3.
3.1.2
temperature adjustment term T
A
temperature relevant to the calculation of the design reference temperature T and dependent on the
R
calculated tensile membrane stress at the appropriate minimum metal temperature
Note 1 to entry Values for temperature adjustment term TA are given in Table B.2–12.
Note 2 to entry For tensile membrane stress reference is made to EN 13480-3:2024, Clause 12.
3.1.3
design reference temperature T
R
temperature used for determining the impact energy requirements and determined by adding the
temperature adjustment T to the minimum metal temperature T
A M
T = T + T
R M A
3.1.4
impact test temperature T
KV
temperature at which the required resistance to impact energy is achieved
Note to entry See B.2.
3.1.5
impact energy KV
energy absorbed by a sample of material when subjected to a Charpy-V-notch impact test in accordance with
EN ISO 148-1:2016
3.1.6
reference thickness e
B
thickness of a component to be used to relate the design reference temperature T of the component with its
R
required impact test temperature T
KV
Note 1 to entry See Tables B.2-2 to B.2-7 and Figures B.2-1 to B.2-11.
Note 2 to entry The reference thickness e , specified in Table B.5-1, is based on the nominal thickness (including
B
corrosion allowance). For butt welded components e is the nominal wall thickness of the
B
component at the edge of the weld preparation.
3.2 Symbols and units
For the purposes of this document, the symbols and units of EN 13480-1:2024 apply together with those given
in Table 3.2-1.
Table 3.2-1 — Symbols and units
Symbol Characteristic Unit
a  Form factor –
K
b  width mm
C constant –
e reference thickness mm
B
G shear modulus N/mm (MPa)
HB Brinell hardness –
HV Vickers hardness –
h maximum permissible reinforcement of weld mm
KV Impact rupture energy J
L length (gauge length) mm
o
P pressure bar
P parameter according to Larson-Miller –
LM
R yield strength N/mm (MPa)
e
R creep rupture strength for T in h at temperature t N/mm (MPa)
m T t
S original cross section area mm
T temperature adjustment term
A °C
T minimum metal temperature
M °C
T material impact test temperature °C
KV
T design reference temperature °C
R
-1
linear expansion coefficient K
α
strain %
ε
NOTE  1 N/mm = 1 MPa
4 Requirements for materials to be used for pressure containing parts in industrial
piping
4.1 General
4.1.1 Materials to be used for pressure containing parts in industrial piping shall meet the general
requirements of 4.1 and the special provisions of 4.2 if applicable. Materials for pressure containing parts shall
be ordered complying with the technical delivery conditions in 4.3.
Marking of materials for pressure containing parts shall be performed in accordance with 4.4.
Materials shall be selected in accordance with Annex A.
Materials shall be selected to be compatible with anticipated fabrication steps and to be suitable for the internal
fluid and external environment. Both normal operating conditions and transient conditions occurring during
fabrication, transport, testing, commissioning and decommissioning shall be taken into account when specifying
the materials.
NOTE 1 The requirements of 4.1 and 4.2 can also be fulfilled when technical delivery conditions are developed for
European Standards for materials , European Approval of Materials or Particular Material Appraisals.
NOTE 2 When technical delivery conditions for pressure-containing parts are developed, the structure and
requirements of EN 764-4:2014 can be met. Exceptions can be technically justified.
The materials shall be grouped in accordance with CEN ISO/TR 15608:2017 to relate manufacturing and
inspection requirements to generic material types.
NOTE 3 Materials have been allocated into these groups in accordance with their chemical composition and properties
in relation to manufacture and heat treatment after welding.
4.1.2 Materials for pressure containing parts compliant with the requirements of this European Standard
shall be certified on the basis of EN 10204:2004.
NOTE The certification can be in accordance with EN 764-5:2014.
4.1.3 The products shall be free from surface and internal defects which might impair their usability.
4.1.4 The specified minimum elongation of the steel after fracture shall be:
— ≥ 14 % for the transverse direction; and
— ≥ 16 % for the longitudinal direction, or where this is the less critical direction, the transverse direction;
when measured on a gauge length, L , calculated as follows:
L0= 5,65 (4.1-1)
S
where
S is the original cross sectional area within the gauge length in order to fulfil formula 4.1-1.
However, lower elongation values than specified in 4.1 (e. g. for fasteners or castings) can also be applied,
provided that appropriate measures shall be taken by the parties concerned to compensate for these lower
values and that compliance with the specific requirements is verifiable.
NOTE Examples of appropriate measures:
— application of higher safety factors in design;
— performance of appropriate burst tests to demonstrate ductile material behaviour.
4.1.5 When measured on a gauge length other than that stated in 4.1.4, the minimum elongation after fracture
shall be determined by converting the elongation given in 4.1.4 in accordance with:
— EN ISO 2566-1:2021 for carbon and low alloy steels;
— EN ISO 2566-2:2021 for austenitic steels.
4.1.6 Steels shall have a specified minimum impact energy measured on a Charpy V-notch impact test
specimen (EN ISO 148-1:2016) as follows:
— ≥ 27 J for ferritic and 1,5 % to 5 % Ni alloyed steels;
— ≥ 40 J for steels of material groups 8, 9.3 and 10,
at a test temperature in accordance with Annex B, but not higher than 20 °C. The other requirements of Annex B
shall also apply.
4.1.7 The chemical composition of steels intended for welding or forming shall not exceed the values given
in Table 4.1-1. Exceptions shall be technically justified.
Table 4.1-1 — Maximum carbon, phosphorus and sulphur content for steel intended for welding or
forming
Maximum content of cast analysis as mass fraction
Material group
(according to Table A.1)
% C % P % S
Steels
a
0,23 0,035 0,025
(1 to 6 and 9)
Ferritic stainless steels
0,08 0,040 0,015
(7.1)
Martensitic stainless steels
0,06 0,040 0,015
(7.2)
Austenitic stainless steels
b
0,08 0,045 0,015
(8.1) (8.3)
Austenitic stainless steels
0,10 0,035 0,015
(8.2)
Austenitic-ferritic stainless steels
0,030 0,035 0,015
(10)
a
Maximum content of product analysis 0,25 % (mass fraction).
b
For products to be machined a controlled sulphur content of 0,015 % (mass fraction) to 0,030 % (mass fraction) is permitted by
agreement provided the resistance to corrosion is satisfied for the intended purpose.

4.2 Special provisions
4.2.1 Special properties
Where the behaviour of a material can be affected by manufacturing processes or operating conditions, to an
extent that would adversely affect the safety or service life of the piping system, this shall be taken into
consideration when specifying the material.
Adverse effects can arise from:
— manufacturing processes: e.g. degree of cold forming, heat treatment;
— operating conditions: e.g. hydrogen embrittlement, corrosion, scaling, wear, ageing behaviour after cold
forming.
4.2.2 Design temperature above 20 °C
4.2.2.1 A material shall only be used for pressure parts within the range of temperatures for which the
material properties required by EN 13480-3:2024 are specified in the technical specification for the material.
If the technical delivery condition does not contain the specific material values required for the design
temperature TR the values required in EN 13480-3:2024 for the design shall be determined by linear
interpolation between the two adjacent values. Values shall not be rounded up.
For other than austenitic and austenitic-ferritic stainless steels, the specified value of R (R ) at room
eH p0,2
temperature can be used for temperatures less than or equal to 50 °C. Interpolation for design temperatures
between 50 °C and 100 °C shall be performed with the values of R at room temperature and at 100 °C, and
eH
using 20 °C as the starting point for interpolation. Above 100 °C linear interpolation shall be performed between
the tabulated values given in the appropriate material standards.
In the case of creep rupture strength values or strength values for plastic strain in a given time, linear
interpolation shall be permissible only if the difference between the two temperatures serving as starting points
for the interpolation is equal to or less than 10 °C.
4.2.2.2 Materials in the creep range shall not be used unless the creep rupture strength values or strength
values for plastic strain needed for design are specified in the base material specification. The manufacturer
of the piping system installation shall be assured by the material supplier that the material supplied is capable
of complying with specified properties (within the normal scatter band) by a statement that the manufacturing
processes have remained equivalent to those for the steel for which the test results were obtained.
4.2.3 Prevention of brittle fracture
The requirements given in Annex B shall apply.
4.2.4 Specific requirements for fasteners
Fasteners include bolts, studs and nuts.
Free cutting steel shall not be used. Fasteners made of carbon steel or low alloyed ferritic steel with > 3,5 %
nickel shall not be used above 300 °C.
The specified minimum tensile strength of bar material of ferritic and martensitic steel for bolts shall not
exceed 1 000 N/mm . The minimum elongation after fracture of bar material shall be at least 14%.
Impact requirements for ferritic steels shall be in accordance with B.2.2-4.
Bolt material with a design temperature below –160 °C shall be impact tested at –196 °C.
Hydrogen embrittlement, fatigue or relaxation properties shall be taken into account where appropriate.
NOTE Detailed requirements on the surface condition and internal soundness of the bar can be necessary for some
applications.
4.2.5 Lined piping
The pressure containing steel of lined industrial piping need not be suitable for the internal fluid if the lining
provides leak tight containment during operation.
4.3 Technical delivery conditions
4.3.1 European Standards
The European Standards for plates, strips, bars, tubes, forgings, fittings and castings for pressure purposes
shall be used.
NOTE 1 Table D.1-1 provides an informative summary of European Materials Standards for steels and steel
components for pressure purposes.
NOTE 2 Table D.2-1 provides an informative summary regarding materials for pressure purposes specified in
harmonised standards grouped according to product forms.
Special provisions due to fabrication and operation shall be taken into account, if appropriate.
4.3.2 European Approval for Materials (EAM)
A material specified in an EAM for piping system shall only be used within its range of application.
4.3.3 Particular Material Appraisals (PMA)
Materials other than those specified in 4.3.1 and 4.3.2 can also be used provided that they have been accepted
by a particular material appraisal (PMA).
4.3.4 Clad products
Technical delivery conditions for clad products for pressure parts shall be in accordance with the
requirements of Annex C.
NOTE 1 European Standards specifying technical delivery conditions for clad products for pressure purposes are not
currently available.
NOTE 2 Examples of documents covering technical delivery condition for clad steels are given within the
publications [2] to [4]
4.3.5 Technical delivery conditions for welding consumables
Technical delivery conditions for welding consumables used for the welding of pressure parts and attachments
to pressure parts shall be in accordance with EN 12074:2000 and EN 13479-1:2017.
NOTE Equivalent national/international specifications are accepted which fulfil the same criteria with respect to the
requirements for the Quality System and the requirements for manufacture, supply distribution, test methods and
evaluation of consumables.
4.4 Marking
The marking of the products or delivery units shall ensure traceability between the product or delivery unit and
the inspection documents.
For European standardized materials, the marking shall fulfil the requirements of the relevant standard. For
materials not contained in a European standard the marking shall at least contain:
— the material specification (reference, material designation);
— the manufacturer's name or mark;
— the stamp of the inspection representative, if applicable.
For material supplied with specific inspection the marking shall include an identification which permits the
correlation between the product or delivery unit and the relevant inspection document.
5 Requirements for materials to be used for non-pressure parts
For non-pressure parts, e.g. supporting lugs, skirts, baffles and similar parts welded to industrial piping, and for
welding consumables, materials shall be used which are supplied to material specifications covering at least the
requirements for the chemical composition and the tensile properties. These materials shall not limit the
operating conditions of the material to which they are attached.
Requirements on materials used for pipe supports are specified in EN 13480-3:2024.
Annex A
(normative)
Grouping system for steels for pressure equipment
Steels shall be grouped as shown in Table A.1. The figures given in group 1 are referring to the ladle analysis of
the materials. The figures given in group 4 to 10 are based on the element content used in the designation of
the alloys.
Table A.1 — Grouping system for steels (extract from CEN ISO/TR 15608:2017)
Sub-
Group Type of steel
group
a
1  Steels with a specified minimum yield strength R ≤ 460 MPa and with analysis as mass
eH
fraction in %:
C ≤ 0,25
Si ≤ 0,60
Mn ≤ 1,70
b
Mo ≤ 0,70
S ≤ 0,045
P ≤ 0,045
b
Cu ≤ 0,40
b
Ni ≤ 0,5
b
Cr ≤ 0,3 (0,4 for castings)
Nb ≤ 0,05
b
V ≤ 0,12
Ti ≤ 0,05
1.1 Steels with a specified minimum yield strength R ≤ 275 MPa
eH
1.2 Steels with a specified minimum yield strength 275 MPa < R ≤ 360 MPa
eH
1.3 Normalized fine grain steels with a specified minimum yield strength R > 360 MPa
eH
1.4 Steels with improved atmospheric corrosion resistance whose analysis can exceed the
requirements for the single elements as indicated under 1
2  Thermomechanically treated fine grain steels and cast steels with a specified minimum
yield strength R > 360 MPa
eH
2.1 Thermomechanically treated fine grain steels and cast steels with a specified minimum
yield strength 360 MPa < R ≤ 460 MPa
eH
2.2 Thermomechanically treated fine grain steels and cast steels with a specified minimum
yield strength R > 460 MPa
eH
3  Quenched and tempered steels and precipitation hardened steels except stainless steels
with a specified minimum yield strength R > 360 MPa
eH
3.1 Quenched and tempered steels with a specified minimum yield strength
360 MPa < R ≤ 690 MPa
eH
3.2 Quenched and tempered steels with a specified minimum yield strength R > 690 MPa
eH
3.3 Precipitation hardened steels except stainless steels
Table A.1 (concluded)
Group Sub- Type of steel
group
4  Low vanadium alloyed Cr-Mo-(Ni) steels with Mo ≤ 0,7 % and V ≤ 0,1 %
4.1 Steels with Cr ≤ 0,3 % and Ni ≤ 0,7 %
4.2 Steels with Cr ≤ 0,7 % and Ni ≤ 1,5 %
c
Cr-Mo steels free of vanadium with C ≤ 0,35 %
5.1 Steels with 0,75 % ≤ Cr ≤ 1,5 % and Mo ≤ 0,7 %
5.2 Steels with 1,5 % < Cr ≤ 3,5 % and 0,7 % < Mo ≤ 1,2 %
5.3 Steels with 3,5 % < Cr ≤ 7,0 % and 0,4 % < Mo ≤ 0,7 %
5.4 Steels with 7,0 % < Cr ≤ 10 % and 0,7 % < Mo ≤ 1,2 %
6  High vanadium alloyed Cr-Mo-(Ni) steels
6.1 Steels with 0,3 % ≤ Cr ≤ 0,75 %, Mo ≤ 0,7 % and V ≤ 0,35 %
6.2 Steels with 0,75 % < Cr ≤ 3,5 %, 0,7 % < Mo ≤ 1,2 % and V ≤ 0,35 %
6.3 Steels with 3,5 % < Cr ≤ 7,0 %, Mo ≤ 0,7 % and 0,45 % ≤ V ≤ 0,55 %
6.4 Steels with 7,0 % < Cr ≤ 12,5 %, 0,7 % < Mo ≤ 1,2 % and V ≤ 0,35 %
7  Ferritic, martensitic or precipitation hardened stainless steels with C ≤ 0,35 % and
10,5 % ≤ Cr ≤ 30 %
7.1 Ferritic stainless steels
7.2 Martensitic stainless steels
7.3 Precipitation hardened stainless steels
8  Austenitic steels, Ni ≤ 35 %
8.1 Austenitic stainless steels with Cr ≤ 19 %
8.2 Austenitic stainless steels with Cr > 19 %
8.3 Manganese austenitic stainless steels with 4 % < Mn ≤ 12 %
9  Nickel alloyed steels with Ni ≤ 10 %
9.1 Nickel alloyed steels with Ni ≤ 3 %
9.2 Nickel alloyed steels with 3 % < Ni ≤ 8 %
9.3 Nickel alloyed steels with 8 % < Ni ≤ 10 %
10  Austenitic ferritic stainless steels (duplex)
10.1 Austenitic ferritic stainless steels with Cr ≤ 24 % and Ni > 4 %
10.2 Austenitic ferritic stainless steels with Cr > 24 % and Ni > 4 %
10.3 Austenitic ferritic stainless steels with Ni ≤ 4 %
a
In accordance with the specification of the steel product standards, R can be replaced by R or R .
eH p0,2 t0.5
b
A higher value is accepted provided that Cr + Mo + Ni + Cu + V ≤ 0,75 % (mass fraction).
c
“Free of vanadium” means not deliberately added to the material.

Annex B
(normative)
Requirements for prevention of brittle fracture at low temperatures
B.1 General
This annex distinguishes between pressure equipment that has design temperature for normal operation
higher or lower than 50 °C.
For pressure equipment with normal operation temperatures higher than 50 °C B.5 applies. If B.5 is not
applicable, the following rules for lower normal operation temperatures shall be used.
For pressure equipment with design temperature equal to or less than 50 °C this annex specifies three
alternative methods for establishing criteria for the prevention of low temperature brittle fracture of
steels in the form of plate, strip, tubes, fittings, forgings, castings, flanges, fasteners and weldments used
in pressure parts. In this case, the temperature for the design T shall be determined . The criteria are
R
based on impact energy requirements at specified temperatures for the base material, heat affected zone
(including the fusion line) and weld metals.
The three methods are:
Method 1 Code of Practice:
Technical requirements
a) Technical requirements based on the choice of TR = T27J as specified in harmonised
European Material Standards and on the assumption that it is possible to achieve these
minimum properties after fabrication. Calculated from the principles of fracture
mechanics used for method 2 for C and CMn steels with yield strength < 460 MPa and
b) based on operating experience for Ni-alloyed steels with Ni ≥ 3 % up to 9 %, for
austenitic steels and for bolts and nuts.
Method 2 Method developed from the principles of fracture mechanics and from operating
experiences:
A more flexible approach than method 1 for derivation of technical requirements applicable
to C, CMn and low alloy ferritic steels with a specified minimum yield strength ≤ 500 N/mm
and for austenitic-ferritic steels with a specified minimum yield strength ≤ 550 N/mm . This
method can be applied for these steels to a wider range of thicknesses and temperatures
than method 1 because T must not be equal to T (see Figures B.2-1 to B.2-11). In addition
R 27J
for ferritic steels with max. 355 N/mm in PWHT condition operation experience was
considered for higher thicknesses.

Including temperatures at pressure tests
See EN 13480-2:2024, 3.1.3.
Method 3 The application of a fracture mechanics analysis:
This general method is applicable to cases not covered by methods 1 or 2. This method can
also be used to justify deviations from the requirements of method 1 or 2. Only general
guidance is given on the use of this method which shall only be used in agreement with the
parties concerned.
Each of the three methods can be used independently. It is only necessary to satisfy the requirement of
any one method.
All applicable combinations of the temperatures T (minimum metal temperature) and T (temperature
M A
adjustment term) shall be considered and the lowest possible T -value (design reference temperature)
R
shall be used for the determination of the required material impact test temperature.
NOTE For definitions of temperature terms see 3.1.1 to 3.1.4.
B.2 Material selection and impact energy requirements
B.2.1 General
The methods specified in B.2.2 (Method 1) or B.2.3 (Method 2) shall be used to determine the impact
energy required to avoid brittle fracture. Alternatively, B.2.4 (Method 3) can be used to determine the
required toughness. The method used shall be fully documented, in order to ensure that compliance can
be verified.
Reference thickness for constructional details is specified in Table B.5-1.
B.2.2 Method 1 – Code of practice
B.2.2.1 General
Method 1 allows the selection of materials taken from harmonised European material standards with
regard to prevention of brittle fracture. Table B.2-1 gives an overview to the following tables by steel type
and product form.
The weld metal, the heat affected zone and other parts affected by manufacturing processes shall satisfy
th
...