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
Publication Date
16-Dec-2014
Current Stage
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Due Date
03-Jun-2020
Completion Date
03-Jun-2020

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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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SIST EN 764-4:2015
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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SIST EN 764-4:2015
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
width mm
thickness mm
max. permissible reinforcement of weld mm
temperature °C
design temperature °C
A elongation after fracture %
C constant —
D diameter mm
E modulus of elasticity MPa
G shear modulus MPa
HV Vickers hardness —
Charpy V-notch impact energy J
original gauge length mm
P pressure bar
parameter according to Larson-Miller —
yield strength MPa
upper yield strength MPa
lower yield strength MPa
tensile strength MPa
creep rupture strength for t hours at T °C MPa
cm/t/T
tensile strength at temperature T MPa
m/T
0,2 % proof strength at temperature T MPa
p0,2/T
0,2 % proof strength MPa
p0,2
1,0 % proof strength MPa
p1,0
1,0 % proof strength at temperature T MPa
p1,0/T
original cross sectional area mm
time h
− 1
linear expansion coefficient K
strain %
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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SIST EN 764-4:2015
EN 764-4:2014 (E)

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

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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SIST EN 764-4:2015
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
Clause 10 50 250 50
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
...

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