SIST EN 764-4:2015

Pressure equipment - Part 4: Establishment of technical delivery conditions for metallic materials

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.

Druckgeräte - Teil 4: Erstellung von technischen Lieferbedingungen für metallische Werkstoffe

Diese Europäische Norm legt die Anforderungen entsprechend der EU-Richtlinie 97/23/EG für Druckgeräte (DGRL) für die Festlegungen der technischen Lieferbedingungen als:
-   harmonisierte Europäische Werkstoffnorm;
-   Europäische Werkstoffzulassung (EAM);
-   Werkstoff-Einzelgutachten (PMA),
für metallische Werkstoffe für Druckgeräte in allen Erzeugnisformen fest. Schweißzusätze werden in dieser Norm nicht behandelt.
Diese Europäische Norm wurde vorrangig auf der Grundlage von Stahl , Nickel- und nickelbasierten Werkstoffen entwickelt. Sie darf jedoch auf andere Werkstoffe angewendet werden, wobei jedoch besondere Aspekte bezüglich des betreffenden Werkstoffs berücksichtigt werden sollten.

Equipements sous pression - Partie 4: Etablissement des conditions techniques de livraison des matériaux métalliques

La présente Norme européenne spécifie les exigences, selon le régime de la Directive européenne 97/23/CE concernant les équipements sous pression (DESP), pour l'établissement des conditions techniques de livraison sous forme de :
-   Normes européennes harmonisées de matériau ;
-   Approbations Européennes de Matériaux (AEM) ;
   Evaluation Particulière de Matériaux (EPM) ;
pour les matériaux métalliques destinés aux équipements sous pression sous toutes les formes de produits. Les produits consommables pour le soudage ne relèvent pas de la présente norme.
La présente Norme européenne a été développée principalement pour les aciers, le nickel et les matériaux à base de nickel. Cependant, son application à d’autres matériaux n’est pas exclue mais il convient de prendre en compte les aspects spécifiques aux matériaux en question.

Tlačna oprema - 4. del: Strokovne podlage in pogoji za dobavo kovinskih materialov

General Information

• Status: Published
• Public Enquiry End Date: 31-Jan-2013
• Publication Date: 16-Feb-2015
• ICS: 23.020.32 - Pressure vessels
• Technical Committee: TLP - Pressure vessels
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 21-Jan-2015
• Due Date: 28-Mar-2015
• Completion Date: 17-Feb-2015
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: EN 764-4:2014 - Pressure equipment - Part 4: Establishment of technical delivery conditions for metallic materials

Relations

• Replaces: SIST EN 764-4:2003 - Pressure equipment - Part 4: Establishment of technical delivery conditions for metallic materials
• Effective Date: 01-Mar-2015

Overview

EN 764-4:2014 - Pressure equipment: Establishment of technical delivery conditions for metallic materials is a CEN European Standard that sets out how to establish technical delivery conditions for metallic materials used in pressure equipment under the EU Pressure Equipment Directive (PED 97/23/EC). It covers three routes for material specification: harmonized European material standards, European Approval for Materials (EAM), and Particular Material Appraisal (PMA). The standard was developed mainly for steels, nickel and nickel‑based alloys but may be applied to other metallic materials where relevant aspects are addressed.

Key topics and requirements

• Types of technical delivery conditions: harmonized standards, EAMs (for repeated use grades not covered by harmonized standards), and PMAs (case‑by‑case approvals).
• Content of delivery conditions: general provisions, mandatory requirements, testing and inspection, and marking rules.
• Testing and inspection: defines the scope for material testing and inspection regimes referenced to established material and testing standards (e.g., EN 10028 series, EN 10216/10217, EN ISO 148‑1, EN ISO 6892‑1).
• EAM procedures: normative Annex A details the procedure, structure and minimum content for issuing European Approvals for Materials.
• Appraisal schedules: normative annexes provide appraisal and test schedules for common groups (ferritic/martensitic steels, austenitic and duplex steels, cast steels) and guidance on welded specimen testing.
• Relationship to PED: Annex ZA maps how the standard supports essential requirements of the Pressure Equipment Directive.
• Exclusions: welding consumables are not covered.

Practical applications

• Establishing robust, PED‑compliant material specifications and delivery conditions for pressure vessels, boilers, gas cylinders and related unfired pressure equipment.
• Developing EAM datasheets for material grades not captured by harmonized standards and preparing PMAs for specific or novel applications.
• Defining testing, inspection and marking requirements to support conformity assessment and material traceability during procurement and manufacture.

Who uses this standard

• Manufacturers of pressure equipment and components (vessels, tubes, forgings, castings).
• Material suppliers preparing technical delivery documentation.
• Design and mechanical engineers specifying materials for pressure‑retaining applications.
• Notified bodies and conformity assessment bodies assessing compliance with PED.
• Standards committees and technical experts drafting EAMs and harmonized material standards.

Related standards (examples)

• EN 10028 (steels for pressure purposes), EN 10216 / EN 10217 (seamless and welded tubes), EN 10222 (forgings), EN ISO 148‑1 (Charpy impact), EN ISO 6892‑1 (tensile testing). Annex ZA of EN 764‑4 links the standard explicitly to PED essential requirements.

Keywords: EN 764-4:2014, pressure equipment, technical delivery conditions, metallic materials, EAM, PMA, PED, harmonized European standards, material specification, pressure vessels.

Standards Content (Sample)

SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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.

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
Annex ZA (informative) Relationship between this European Standard and the Essential Requirements
of EU Directive 97/23/EC on Pressure Equipment . 39
Bibliography . 40

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.
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)
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.
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
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
S
original cross sectional area mm
o
t
time h
− 1
α
linear expansion coefficient K
ε
strain %
V
Poisson's ratio —
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;
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.
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;
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.
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.
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 properties or characteristics shall be supplementary to those in similar
harmonized standards. See also PED Guideline 7/15.
An EAM is a route to facilitate the use of safe materials in absence of harmonized standards and to encourage
material technology development and innovation.
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 was previously included in a European national material standard but which was not
included in the harmonized European material standard which has replaced the European national material
standard.
In those cases a PMA is to be drawn up, see PED guidelines 7/21 and 9/13.
A.2 European Approvals for Materials
European Approvals for new materials are to be established in accordance with A.3.
A.3 Requirements for the establishment of an EAM
A.3.1 When an application is made for an EAM the Notified Body shall establish that:
a) the material is not covered by any other existing EAM;
b) the proposal fulfils the requirements in Clause 5;
c) the material characteristics which are of importance for the intended processing and application of the material
are available and whether these are at a level which does necessitate special precautions during processing
and application, e.g.:
1) cold and hot formability;
2) weldability;
3) hardening and tempering behaviour;
4) ageing behaviour;
5) fatigue strength;
6) corrosion resistance;
d) the material characteristics necessary for the proposed EAM can be consistently fulfilled.
A.3.2 For the establishment of the EAM a test programme shall be developed in co-operation between the
material manufacturer(s) and the Notified Body to fulfil the requirements in A.3.1 c) and A.3.1 d). The type and
extent of testing shall consider the processing and use of the product forms as well as the expected minimum
properties. Annex B to Annex E may be used as guidelines to select the relevant tests to be included in the test
programme.
The test program shall involve at least five casts. The test program shall specify which tests shall be confirmed by
the Notified Body.
A group of material manufacturers may cooperate in such a test program.
A.4 Title scheme and structure of an EAM
A data Sheet for an EAM shall contain the applicable elements given in Table A.1 and the title scheme of that table.
NOTE Examples of existing EAMs can be found under: http://ec.europa.eu/enterprise/sectors/pressure-and-
gas/documents/ped/materials/index_en.htm.
Table A.1 — Title scheme and structure of a European Approval for Materials (EAM) for pressure purposes
Logo of European Approval for Materials EAM No. .
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Notified
Title Date of issue:
Body
1 Material designation
2 Product form
3 Dimensions
4 Scope (Range of application)
5 References
6 Requirements
6.1 Delivery conditions (heat treatment)
a
6.2 Type of manufacture (steelmaking process)
a
6.3 Deoxidization
6.4 Chemical composition
Cast analysis
a
Product analysis
6.5 Mechanical and technological properties
Tensile properties (e.g. R , R , R , R at room temperature
eH p0,2 p1,0 m)
a
Tensile properties at elevated temperatures
Charpy V-notch impact energy
Other properties, e.g. hardness properties
Logo of European Approval for Materials EAM No. .
the
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Title Date of issue:
Body
6.6 Surface treatment condition
6.7 Internal soundness
a
Other properties , (e.g. corrosion)
7 Verification testing and inspection
7.1 Types and content of inspection documents
7.2 Frequency of tests
7.3 Sampling and test piece preparation
7.4 Test procedures
Chemical composition
Tensile test at room temperature
a
Tensile test at elevated temperatures
Charpy V-notch impact test
Visual and dimensional examination
a
Leak tightness test
a
Intercrystalline corrosion resistance
a
Identification test
a
Non-destructive testing
Other tests e.g. hardness test, ring tests, bend tests
7.5 Re-tests
8 Marking
9 Guidelines for processing
9.1 Cold and hot forming
9.2 Welding, thermal cutting
9.3 Post weld heat treatment
a
10 Design data
a
11 Other data
12 EAM prepared by
a
Where applicable.
Annex B
(normative)
Appraisal schedule for ferritic and martensitic steels
B.1 General
The purpose of this annex is to provide a list of properties and test procedures which may be relevant in the
characterization of new ferritic and martensitic steels and the determination of material property requirements.
When assessing the material property requirements, for each specific material, the material properties to be
assessed for which parameters shall be specified shall be selected in accordance with A.3.1. The following
requirements are valid for rolled or forged ferritic-perlitic steels, including normalized and thermomechanically rolled
fine-grain steels (the ferritic grain size, in accordance with EN ISO 643, should at least be equal to or finer than 7)
and martensitic or bainitic air or liquid quenched and tempered steels and copper bearing age hardened steels.
B.2 Test procedures
B.2.1 The type of the testing depends on the processing and use of the product forms in question. Tests shall be
carried out in the normal delivery conditions unless otherwise specified.
The applicable verification test standards shall be indicated.
B.2.2 In the case of a simultaneous appraisal of a number of product forms or thicknesses, the samples to be
tested shall be selected, that they cover the scope proposed for appraisal and the required manufacturing
procedures. Endeavours shall be made to select as low a number of test samples as possible, covering the whole
size range, see Table B.1.
B.2.3 The appraisal of the product forms shall be performed with respect to the thickness for each product form
as given in Table B.1.
Table B.1 — Thickness for product forms
Dimensions in millimetres
Product form Thickness
I II III
Strip < 4,5 4,5 to 12 > 12
Plate < 30 30 to 70 > 70
Tube < 30 30 to 70 > 70
Forging/rolled bar < 150 150 to 300 > 300
B.2.4 The products to be tested shall be at the upper limit (100 %) of the requested thickness range.
B.2.5 The tests may be divided into those, which shall be conducted before the first delivery (basic testing) and
those, which shall be carried out during initial deliveries (subsequent testing).
B.2.6 Testing shall generally be performed as follows:
Normally the tensile testing is performed over the full thickness for a product thickness e ≤ 30 mm. For a product
thickness e > 30 mm the thickness may be reduced to ≥ 30 mm retaining one rolled surface on the rectangular test
piece, with the exception, that for quenched and tempered or thermomechanically rolled plates, the specimen shall
be half the product thickness.
Circular test pieces are permissible but shall only be provided for a product thickness e > 30 mm. The specimen
diameter shall be at least 10 mm.
For a product thickness e > 70 mm a circular test specimen taken from mid thickness of the product shall be tested
additionally.
For the impact tests the test specimens shall be taken near the surface for a product thickness e ≤ 40 mm. For a
product thickness e > 40 mm the location for the specimen shall be in e/4, for e > 50 mm additionally in e/2.
B.3 Required testing
B.3.1 General
Required testing shall be conducted on at least five casts, which should cover the specified range of analysis and
of the heat treatment.
A group of material manufacturers may cooperate in such a test programme.
B.3.2 Determination of the chemical composition
The cast analysis shall be given by the material manufacturer. The product analysis shall be carried out on samples
to determine all elements given by the material data sheet.
B.3.3 Tensile tests
B.3.3.1 Tensile tests at room temperature shall be carried out at 23 °C ± 5 °C in accordance with
EN ISO 6892-1:2009, Clause 5 of to determine the upper yield strength (or should continuous yielding occur, the
0,2 % proof strength) tensile strength, elongation after fracture (A) and reduction of area.
Samples shall be tested in the longitudinal and transverse/tangential directions. The test results will indicate the
degree of directionality occurring in the properties of a product and the direction with inferior mechanical properties.
B.3.3.2 Trend curves up to 50 K above the maximum operating temperature in accordance with EN 10314
shall be determined for steels for which the minimum strength values at elevated temperature are intended to be
specified.
B.3.4 Charpy V-notch impact test
Charpy V-notch impact tests shall be carried out to determine the upper (100 % shear fracture) and lower shelf
(100 % cleavage fracture) by a complete transition curve.
A complete transition curve shall consist of tests carried out in accordance with EN ISO 148-1 with a 2 mm striker
(KV ) for minimum six temperatures with maximum interval of 20 K. At each temperature a minimum of 3 tests shall
be performed. The shear fracture percentage shall be determined in addition. The measurement of lateral
expansion is optional.
The transition temperature curves are required for both longitudinal and transverse/tangential direction. The most
critical curve of any direction tested shall be used for the qualification of the material.
A statistical derivation of all results from all tested casts shall be performed for each temperature to derive a lower
bound value.
B.3.5 Technological tests
As far as for the new product specific technological properties need to be characterized, bend tests, flaring tests,
flanging tests, ring tensile tests, ring flattening tests, ring expansion tests or other tests appropriate to the material
shall be carried out.
B.3.6 Metallographic investigation
Metallographic examination shall be carried out to assess microstructure, grain size and non-metallic inclusions.
B.3.7 Hardness testing
In the case of quenched and tempered and thermomechanically rolled materials, a hardness survey over the
product thickness shall be carried out to determine homogeneity.
B.3.8 Production of a tempering chart for quenched and tempered and age-hardened steels
The tempering characteristic shall be determined for yield strength, tensile strength, yield strength to tensile
strength ratio, elongation after fracture, reduction of area and impact energy at a minimum of three different
tempering temperatures between 550 °C and 700 °C and for two tempering times. Tempering temperatures and
holding times shall be transformed in Hollomon-Jaffe parameters and the change of the mechanical properties shall
1)
be plotted over the Hollomon-Jaffe parameter . Temperatures and times should be fixed as to reveal any tendency
towards tempering embrittlement.
Tensile tests shall be conducted and impact tests with Charpy V-notch transverse specimens at three typical
temperatures in the transition range including the lowest specified temperature.
B.3.9 Determination of the transformation behaviour
In order to estimate the transformation behaviour of transformable steels the transition points shall be determined
by tests.
A Continuous-Cooling-Transformation diagram (CCT diagram) shall be produced for quenched and tempered or
age-hardened steels (see EN ISO 10052).
B.3.10 Investigation of the effect of stress relief
B.3.10.1 General
It shall be proven that materials and weldments after stress relief procedures meet the minimum properties
specified for the materials to be joined.

1) Hollomon Parameter:
-3
P = T × (20 + lg t) × 10
s
where
T is the holding temperature, in Kelvin;
s
t is the holding time, in hours.
If stress relief will be performed for the material and its weldment it is necessary to provide information about the
boundary conditions for the stress relief procedure. Such boundary conditions are:
— minimum and maximum holding time;
— minimum and maximum stress relief temperature;
— heating and cooling conditions.
B.3.10.2 Procedure
To derive the stress relief boundary conditions which fulfill the Essential Safety Requirements it is recommended to
express the stress relief conditions by Hollomon-Jaffe Parameter and plot the results of the mechanical testing over
the Hollomon-Jaffe Parameter.
The following mechanical testing is recommended:
— Tensile tests;
— Hardness tests;
— Charpy V-impact tests
to derive the boundary conditions in terms of maximum and minimum applicable values for time and temperature.
For base metal specimens shall be taken from the direction relative to rolling direction with the lower values. The
position shall comply with the requirements in relevant European harmonized material standards.
If applied for weldments, Annex E applies for the positioning of test specimen.
The level of stress relief to be achieved for materials with brittle fracture transition behaviour is a reduction to a
residual stress level of not more than 30 % of the guaranteed minimum yield strength at 23 °C ± 5 °C for the actual
base material. Secondary stress measurement shall be performed to verify that the specified level of stress
reduction has been achieved (Annex E).
The material manufacturer shall provide an assessment of the relevant boundary conditions. Deviations from these
conditions shall be re-assessed.
B.3.11 Investigation of the effect of cold forming
B.3.11.1 Determination of the cold formability
Cold forming shall be carried out by straining with two levels of deformation, preferably 2 % and 5 %. If a higher
level than 5 % deformation is required this shall be carried out in place of the 5 % deformation. Charpy V-notch
impact tests on transverse specimens shall be carried out to determine Charpy V-notch impact energy-temperature
curves in the cold formed condition. If the level of deformation is greater than 5 % similar tests shall also be carried
out after stress relief heat treatment (in a typical stress relief condition). Where the level of deformation is 5 % or
greater tensile tests shall be carried out additionally in both cold formed condit
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