SIST EN 764-4:2015

SLOVENSKI STANDARD
SIST EN 764-4:2015
01-marec-2015
1DGRPHãþD
SIST EN 764-4:2003
7ODþQDRSUHPDGHO6WURNRYQHSRGODJHLQSRJRML]DGREDYRNRYLQVNLK
PDWHULDORY
Pressure equipment - Part 4: Establishment of technical delivery conditions for metallic
materials
Druckgeräte - Teil 4: Erstellung von technischen Lieferbedingungen für metallische
Werkstoffe
Equipements sous pression - Partie 4: Etablissement des conditions techniques de
livraison des matériaux métalliques
Ta slovenski standard je istoveten z: EN 764-4:2014
ICS:
23.020.30 7ODþQHSRVRGHSOLQVNH Pressure vessels, gas
MHNOHQNH cylinders
SIST EN 764-4:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 764-4:2015

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SIST EN 764-4:2015

EUROPEAN STANDARD
EN 764-4

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2014
ICS 23.020.30 Supersedes EN 764-4:2002
English Version
Pressure equipment - Part 4: Establishment of technical delivery
conditions for metallic materials
Equipements sous pression - Partie 4: Etablissement des Druckgeräte - Teil 4: Erstellung von technischen
conditions techniques de livraison des matériaux Lieferbedingungen für metallische Werkstoffe
métalliques
This European Standard was approved by CEN on 8 November 2014.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 764-4:2014 E
worldwide for CEN national Members.

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SIST EN 764-4:2015
EN 764-4:2014 (E)
Contents Page
Foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions, symbols and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Symbols and abbreviations . 6
4 Types of technical delivery conditions . 8
4.1 Harmonized European Standards for material for pressure equipment . 8
4.2 European Approvals for Materials for pressure equipment (EAMs) . 8
4.3 Particular Material Appraisals for pressure equipment (PMAs) . 8
5 Content of technical delivery conditions for materials for pressure equipment . 9
5.1 General . 9
5.2 Requirements . 9
5.3 Testing and inspection . 11
5.4 Marking . 12
Annex A (normative) Procedures for the establishment of European Approvals for pressure
equipment Materials (EAM) . 13
A.1 General . 13
A.2 European Approvals for Materials . 13
A.3 Requirements for the establishment of an EAM . 13
A.4 Title scheme and structure of an EAM . 14
Annex B (normative) Appraisal schedule for ferritic and martensitic steels . 16
B.1 General . 16
B.2 Test procedures . 16
B.3 Required testing. 17
B.4 Subsequent testing. 21
B.5 Collective tests . 22
Annex C (normative)  Appraisal schedule for austenitic and austenitic-ferritic steels . 24
C.1 General . 24
C.2 Test procedures . 24
C.3 Basic testing . 25
C.4 Sampling . 27
C.5 Extent of testing . 27
Annex D (normative)  Appraisal schedule for cast steels. 28
D.1 General . 28
D.2 Test procedures . 28
D.3 Basic testing . 29
D.4 Sampling . 31
D.5 Extent of testing . 31
Annex E (normative) Test programme for welded specimen after stress relief procedure . 33
E.1 Test programme . 33
E.2 Position of specimen . 33
Annex F (informative) Example for Particular Material Appraisal (PMA) for steel . 35
Annex G (informative) History of EN 764-4 . 38
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EN 764-4:2014 (E)
Annex ZA (informative) Relationship between this European Standard and the Essential Requirements
of EU Directive 97/23/EC on Pressure Equipment . 39
Bibliography . 40

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SIST EN 764-4:2015
EN 764-4:2014 (E)
Foreword
This document (EN 764-4:2014) has been prepared by Technical Committee CEN/TC 54 “Unfired pressure
vessels”, the secretariat of which is held by BSI.
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 June 2015 and conflicting national standards shall be withdrawn at the latest by
June 2015.
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 supersedes EN 764-4:2002.
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.
For relationship with EU Directive 97/23/EC (PED), see informative Annex ZA, which is an integral part of this
document.
Regarding the most significant technical changes that have been implemented in this new edition of EN 764-4,
see Annex G.
EN 764, Pressure equipment, consists of the following parts:
— Part 1: Terminology - Pressure, temperature, volume, nominal size;
— Part 2: Quantities, symbols and units;
— Part 3: Definition of parties involved;
— Part 4: Establishment of technical delivery conditions for metallic materials (the present document);
— Part 5: Inspection documentation of metallic materials and compliance with the material specification;
— Part 6: Structure and content of operating instructions [Technical Report CEN/TR 764-6];
— Part 7: Safety systems for unfired pressure equipment;
— Part 8: Proof test [Technical Specification prCEN/TS 764-8, currently under development].
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
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SIST EN 764-4:2015
EN 764-4:2014 (E)
1 Scope
This European Standard specifies the requirements, under the regime of the EU Directive 97/23/EC on Pressure
Equipment (PED), for the establishment of the technical delivery conditions in the form of:
— harmonized European Standards for material;
— European Approval for Materials (EAM);
— Particular Material Appraisal (PMA)
for metallic materials for pressure equipment in all product forms. Welding consumables are not covered by this
standard.
This European Standard was developed predominantly on the basis of steel, nickel and nickel-based materials.
However, application to other materials is not restricted but should consider specific aspects relevant to the
material concerned.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for
its application. For dated references, only the edition cited applies. For undated references, the latest edition of the
referenced document (including any amendments) applies.
EN 764-1:2004, Pressure equipment - Part 1: Terminology - Pressure, temperature, volume, nominal size
EN 764-2:2012, Pressure equipment - Part 2: Quantities, symbols and units
EN 10028 (all parts), Flat products made of steels for pressure purposes
EN 10164, Steel products with improved deformation properties perpendicular to the surface of the product -
Technical delivery conditions
EN 10204, Metallic products - Types of inspection documents
EN 10213, Steel castings for pressure purposes
EN 10216 (all parts), Seamless steel tubes for pressure purposes - Technical delivery conditions
EN 10217 (all parts), Welded steel tubes for pressure purposes - Technical delivery conditions
EN 10222 (all parts), Steel forgings for pressure purposes
EN 10272, Stainless steel bars for pressure purposes
EN 10273, Hot rolled weldable steel bars for pressure purposes with specified elevated temperature properties
EN 10314, Method for the derivation of minimum values of proof strength of steel at elevated temperatures
EN ISO 148-1, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1)
EN ISO 204, Metallic materials - Uniaxial creep testing in tension - Method of test (ISO 204)
EN ISO 6892-1:2009, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-1)
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EN 764-4:2014 (E)
EN ISO 10052, Acoustics - Field measurements of airborne and impact sound insulation and of service equipment
sound - Survey method (ISO 10052)
EN ISO 15607, Specification and qualification of welding procedures for metallic materials - General rules
(ISO 15607)
CR ISO 15608:2000, Welding - Guidelines for a metallic material grouping system (ISO/TR 15608:2000)
EN ISO 15614-1, Specification and qualification of welding procedures for metallic materials - Welding procedure
test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1)
3 Terms and definitions, symbols and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
European Approval for Materials
EAM
technical document defining the characteristics of materials intended for repeated use in the manufacture of
pressure equipment which are not covered by any harmonized standard
Note 1 to entry: See Article 11 of the EU Directive 97/23/EC on Pressure Equipment (PED) and see also the PED Guideline
7/26.
3.2 Symbols and abbreviations
For the purposes of this standard, the symbols and abbreviations of EN 764-1:2004, EN 764-2:2012 and the
following in Table 1 and Table 2 apply.
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SIST EN 764-4:2015
EN 764-4:2014 (E)
Table 1 — Symbols and units
Symbols Characteristic Units
b
width mm
e
thickness mm
h
max. permissible reinforcement of weld mm
T
temperature °C
T
design temperature °C
D
A elongation after fracture %
C constant —
D diameter mm
E modulus of elasticity MPa
G shear modulus MPa
HV Vickers hardness —
KV
Charpy V-notch impact energy J
2
L
original gauge length mm
o
P pressure bar
P
parameter according to Larson-Miller —
LM
R
yield strength MPa
e
R
upper yield strength MPa
eH
R
lower yield strength MPa
eL
R
tensile strength MPa
m
R
creep rupture strength for t hours at T °C MPa
cm/t/T
R
tensile strength at temperature T MPa
m/T
R
0,2 % proof strength at temperature T MPa
p0,2/T
R
0,2 % proof strength MPa
p0,2
R
1,0 % proof strength MPa
p1,0
R
1,0 % proof strength at temperature T MPa
p1,0/T
2
S
original cross sectional area mm
o
t
time h
− 1
α
linear expansion coefficient K
ε
strain %
V
Poisson's ratio —

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SIST EN 764-4:2015
EN 764-4:2014 (E)
Table 2 — Abbreviations
Abbreviation Description
EAM European Approval for Materials
EC European Commission
PED Pressure Equipment Directive
PMA Particular Material Appraisal
OJEU Official Journal of the European Union

4 Types of technical delivery conditions
4.1 Harmonized European Standards for material for pressure equipment
Harmonized European material standards under the regime of the PED define the technical requirements for
materials frequently used in pressure equipment in Europe. It is within the remit of the responsible technical
committee for materials to check at each occasion of the revision work whether related material grades covered by
an EAM are used to an extent that justifies the incorporation of the grade into the relevant harmonized European
material Standard.
4.2 European Approvals for Materials for pressure equipment (EAMs)
A European approval for materials means a technical document defining the characteristics of materials intended
for repeated use in the manufacture of pressure equipment, the type of which is not covered by any harmonized
European material standard. According to Guiding Principles for the contents of EAM drafts, agreed by the Member
States of the European Union and the European Commission, it shall i.a. describe material properties in a concise,
complete and correct manner.
The ways and means undertaken to achieve an EAM and a data sheet containing at least the applicable elements
is given in Annex A.
An EAM shall not be issued for:
a) a grade of material listed in a current or former national material standard that has a specification covered by a
harmonized European material standard;
b) a grade of material which is previously included in a European national material standard but which is not
included in the harmonized European material standard which has replaced the European national material
standard (ref. PED Guideline 7/26).
NOTE 1 Reference of available EAMs is published in the Official Journal of the European Union (OJEU).
NOTE 2 Actual EAMs are also published at the following website of the European Commission:
http://ec.europa.eu/enterprise/sectors/pressure-and-gas/documents/ped/materials/index_en.htm.
4.3 Particular Material Appraisals for pressure equipment (PMAs)
Particular material appraisals apply for individual cases as for example:
a) a material grade or a product form or a thickness not covered by a harmonized European material standard,
harmonized under the scope of the PED, or by an EAM;
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SIST EN 764-4:2015
EN 764-4:2014 (E)
b) a product specified in a harmonized European material standard for pressure purposes or in an EAM is
intended in an exceptional case for service conditions outside its specified range of application.
For pressure equipment classified in category III and IV according to the PED, the PMA/PMAs, which irrespective
of category (I to IV) always shall be drawn up by the equipment manufacturer, shall be appraised and confirmed by
the Notified Body in charge of the conformity assessment for the actual piece of pressure equipment.
Where relevant to the pressure equipment under consideration the requirements given in Annex B to Annex E
together with EN 13445-2:2014, 4.1 and 4.2, may be used as guidance. An example for PMA is given in Annex F.
5 Content of technical delivery conditions for materials for pressure equipment
5.1 General
Technical delivery conditions for materials for pressure equipment shall describe the material with its specific
properties and shall at least contain clauses for scope, normative references, requirements, testing and inspection
and marking and restriction on application where necessary with a distinction between mandatory and optional
requirements.
EAMs and PMAs shall take account of material processing. If appropriate, information on the allocation of the
material to the relevant material group in CR ISO 15608 shall be provided with the technical material specification.
PMAs shall always specify in detail the range of application.
5.2 Requirements
5.2.1 Manufacture
The method of manufacture of the material shall be specified. Details need only be specified to an extent as is
necessary to ensure the specified quality.
5.2.2 Treatment condition
The following conditions shall be specified:
— type of heat treatment condition;
— surface condition of the material at the time of delivery, where necessary.
5.2.3 Chemical composition
The chemical composition limits shall be specified. Where the composition of the product may be different from the
composition of the cast, limit deviations from the cast analysis shall be specified.
The specification of the chemical composition shall include the following general statement:
Elements, which can influence the essential material characteristics, not specified for the specific material shall not
intentionally be added. All reasonable precautions shall be taken to prevent the addition of elements from scrap or
other materials used in the manufacture, but residual elements may be present, provided the specified mechanical
properties are met and the applicability is not impaired.
5.2.4 Mechanical and technological properties
The technical material specification shall specify properties in the direction and location of test pieces which shall
be representative of the material characteristics.
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Where the form and thickness of the products permit the verification testing of transverse test pieces, the property
characteristics shall be given for the transverse (radial for pipes) direction.
In those cases, where the properties in the longitudinal direction are lower, this shall be taken into account.
The following properties shall be specified for the individual steel grades:
a) Tensile properties at room temperature:
1) Yield or proof strength:
For austenitic steels minimum proof strength values for 1,0 % non proportional extension (R and,
p1,0/min
where appropriate, R values additionally) shall be specified;
p0,2/min
For all other materials the minimum value for the upper yield strength or, for cases where no yield
phenomenon occurs, the minimum proof strength for 0,2 % non proportional extension shall be specified;
2) Tensile strength:
For the tensile strength, a minimum value shall be specified. A maximum value shall be specified
additionally where no maximum yield or proof strength value is specified;
3) Elongation after fracture:
The minimum percentage elongation after fracture for the proportional gauge length AS= 5,65 shall
o
be specified;
b) Charpy V-notch impact properties:
The impact properties of the material shall be specified with regard to the Essential Safety Requirements to
avoid brittle fracture; A minimum level of Charpy energy shall be specified even if the product form and size
does not allow to extract Charpy specimen;
c) Elevated temperature tensile properties:
The following tensile properties shall be specified for temperatures in accordance with Table 3:
1) for austenitic steels intended for an application at a temperature ≥ 50 °C and in accordance with Table 3
the minimum 1,0 % proof strength at elevated temperatures. It is also proposed to specify the minimum
elevated temperature tensile strength;
2) for all other steels intended for an application at a temperature in accordance with Table 3, but not higher
than the maximum design temperature rounded up to 50 K, the minimum 0,2 % proof strength at elevated
temperatures.
The specified minimum proof strength values at elevated temperatures should be derived in accordance with
EN 10314 on the basis of data determined in accordance with EN ISO 6892-1 and EN ISO 6892-2;
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EN 764-4:2014 (E)
Table 3 — Elevated temperatures for steels
Steel group Temperature
in accordance with preferably in
from to a maximum of
CR ISO 15608:2000 steps of
 °C °C K
Clause 2, 7.1, 7.2, Clause 3
100 400 50
1.1 to 1.3
Clause 4, 5.1, 5.2 100 500 50
5.3, 5.4, Clause 6 100 600 50
Clause 8 50 600 50
a
Clause 10 50 250 50
a
250 °C if welded, 280 °C unwelded.

d) Creep properties:
If a material shall be used at elevated temperatures, where creep rupture is likely to occur, the creep rupture
strength shall be evaluated. For creep testing steps of 10 °C are recommended;
e) Technological properties:
Where necessary, requirements for formability, e.g. specified on the basis of flattening or ring expanding tests
or on the basis of tests for the deformation properties perpendicular to the surface of the product
(see EN 10164) or requirements for other technological properties, important for the processing or use of the
material, shall be specified.
NOTE Direction of axis of test specimen: see EN ISO 3785 [16].
5.2.5 Other material properties
Where necessary, the requirements for properties other than those covered under 5.2.2 to 5.2.4, shall also be
specified together with their methods of verification.
NOTE Other material properties could be weldability, corrosion resistance, fatigue, etc.
5.2.6 Freedom from surface and internal defects
The requirements for non-destructive testing and visual inspection shall be specified.
5.2.7 Dimensions, shape, mass and related tolerances
Dimensions, shape and mass and related tolerances shall be specified where necessary, preferably by reference to
an appropriate dimensional standard.
5.3 Testing and inspection
Depending on product form and type of material, the location and preparation of samples and test pieces and
frequency of testing shall as a minimum be based on the analogous European Standard (EN), e.g.: EN 10028 (all
parts) for flat products, EN 10216 (all parts) and EN 10217 (all parts) for tubes, EN 10213 for castings, and
EN 10222 (all parts) for forgings, EN 10272 and EN 10273 for bars.
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SIST EN 764-4:2015
EN 764-4:2014 (E)
The following requirements on inspection and testing shall be specified:
a) the types of applicable inspection documents (see EN 10204);
b) the requirements to be verified (e.g. chemical composition, tensile properties);
c) the conditions applicable for specific inspection and testing namely:
1) the composition and maximum size of the test unit (e.g. the maximum weight or number of products of the
same cast, heat treatment batch); and
2) the number of sample products per test unit;
3) the number of samples per sample product; and
4) the number of test pieces per sample to be taken and tested;
5) the location and direction of the test pieces in the product;
6) where necessary, additional conditions for sampling and conditions for the preparation of the samples and
test pieces;
7) the European Standards in which the test methods are described;
8) the provisions for retesting;
d) any other necessary specification for testing and inspection.
5.4 Marking
The marking of the delivery units or products shall ensure traceability between these and the inspection
documents.
For European standardized materials the marking shall fulfil the requirements of the relevant product standard.
For other materials the marking shall at least contain:
a) the material specification (reference, material designation);
b) the material manufacturers name or mark;
c) the stamp of the inspection representative, if applicable;
d) an identification which permits the correlation between the product or delivery unit and the relevant inspection
document.
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SIST EN 764-4:2015
EN 764-4:2014 (E)
Annex A
(normative)

Procedures for the establishment of European Approvals for pressure
equipment Materials (EAM)
A.1 General
An EAM may be issued for a special or novel material grade not included in a European material standard
harmonized under the Pressure Equipment Directive (PED). Such a material grade shall have a specification
associated with particular chemistry and/or conferring specific mechanical properties or characteristics such as
corrosion resistance. These mechanical properti
...