prEN 12953-2

Shell boilers - Part 2: Materials for pressure parts of boilers and accessories

This European Standard specifies the following materials for the pressure bearing parts of shell boilers and equipment of shell boilers (e.g. valves), subjected to internal and external pressure including integral attachments (non pressure bearing parts):
   flat products (plate) and parts formed from flat products (e.g. shell, furnace, dished ends);
   tubes and parts formed from tubes (e.g. bending, elbows, reducers, fittings);
   forgings and cast products ;
   bolting materials;
   welding consumables.

Großwasserraumkessel - Teil 2: Werkstoffe für drucktragende Kesselteile und Zubehör

Dieses Dokument gilt für die folgenden Werkstoffe an drucktragenden Teilen von Großwasserraumkesseln und an Teilen der Ausrüstung von Großwasserraumkesseln (z. B. Armaturen), die durch Innen- und Außendruck beansprucht werden sowie für integrale Zubehörteile:
   Flacherzeugnisse (Bleche) und aus Flacherzeugnissen geformte Teile (z. B. Kesselmantel, Flammrohr, gewölbte Kesselböden);
   Rohre und aus Rohren geformte Teile (z. B. Biegung, Bögen, Reduzierstücke, Formstücke);
   Schmiede- und Gussteile;
   Werkstoffe für Schrauben und Muttern;
   Schweißzusätze.

Chaudières à tubes de fumée - Partie 2: Matériaux des parties sous pression des chaudières et des accessoires

Le présent document spécifie les matériaux suivants pour les parties sous pression des chaudières à tubes de fumée et aux équipements de chaudières à tubes de fumée (par exemple, appareils de robinetterie) soumis à pression interne et externe y compris leurs attaches incorporées :
—   produits plats (tôles) et parties formées à partir de produits plats (par exemple, virole, foyer, fonds bombés) ;
—   tubes et parties formées à partir de tubes (par exemple, parties cintrées, coudes, réducteurs, raccords) ;
—   pièces forgées et produits moulés ;
—   matériaux de boulonnerie ;
—   produits consommables pour le soudage.

Mnogovodni kotli - 2. del: Materiali za tlačno obremenjene dele in opremo kotla

General Information

• Status: Not Published
• Publication Date: 15-Feb-2026
• ICS: 27.060.30 - Boilers and heat exchangers
• Technical Committee: CEN/TC 269 - Shell and water tube boilers
• Drafting Committee: CEN/TC 269/WG 2 - Shell boilers
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 02-May-2024
• Due Date: 23-Dec-2024
• Completion Date: 02-May-2024
• 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
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: oSIST prEN 12953-2:2024 - Shell boilers - Part 2: Materials for pressure parts of boilers and accessories

Relations

• Revises: EN 12953-2:2012 - Shell boilers - Part 2: Materials for pressure parts of boilers and accessories
• Effective Date: 11-May-2020

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2024
Mnogovodni kotli - 2. del: Materiali za tlačno obremenjene dele in opremo kotla
Shell boilers - Part 2: Materials for pressure parts of boilers and accessories
Großwasserraumkessel - Teil 2: Werkstoffe für drucktragende Kesselteile und Zubehör
Chaudières à tubes de fumée - Partie 2: Matériaux des parties sous pression des
chaudières et des accessoires
Ta slovenski standard je istoveten z: prEN 12953-2
ICS:
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2024
ICS Will supersede EN 12953-2:2012
English Version
Shell boilers - Part 2: Materials for pressure parts of
boilers and accessories
Chaudières à tubes de fumée - Partie 2: Matériaux des Großwasserraumkessel - Teil 2: Werkstoffe für
parties sous pression des chaudières et des accessoires drucktragende Kesselteile und Zubehör
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 269.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12953-2:2024 E
worldwide for CEN national Members.

Contents Page
Contents
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 General requirements for material selection . 5
4.1 General . 5
4.2 Material specification . 5
4.3 European Approvals for Materials (EAM) . 6
4.4 Particular Material Appraisals (PMA) . 6
5 Materials for pressure parts . 6
5.1 Shell boiler body . 6
5.2 Valves and other forged or cast products . 7
5.3 Bolting material . 8
5.4 Flange and fitting material . 8
5.4.1 Flange material . 8
5.4.2 Fitting material . 8
5.5 Welding consumables . 9
5.6 Inspection documents . 9
5.7 Marking and traceability . 10
5.7.1 General . 10
5.7.2 Material supplied from a supplier other than the material manufacturer . 10
5.7.3 Material traceability during cutting and forming . 10
6 Materials for non pressure parts . 10
Annex A (informative) Example for Particular Material Appraisals (PMA). 11
Annex B (informative) Significant technical changes between this document and the
previous edition . 13
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/68/EU aimed to be covered. 14
Bibliography . 15

European foreword
This document (prEN 12953-2:2024) has been prepared by Technical Committee CEN/TC 269 “Shell
and water-tube boilers”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
Annex B provides details of significant technical changes between this document and the previous
edition.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
The European Standard series EN 12953 concerning shell boilers consists of the following parts:
— Part 1: General
— Part 2: Materials for pressure parts of boilers and accessories
— Part 3: Design and calculation for pressure parts
— Part 4: Workmanship and construction of pressure parts of the boiler
— Part 5: Inspection during construction, documentation and marking of pressure parts of the boiler
— Part 6: Requirements for equipment for the boiler
— Part 7: Requirements for firing systems for liquid and gaseous fuels for the boiler
— Part 8: Requirements for safeguards against excessive pressure
— Part 9: Requirements for limiting devices of the boiler and accessories
— Part 10: Requirements for boiler feed water and boiler water quality
— Part 11: Acceptance tests
— Part 12: Requirements for firing systems for solid fuels for the boiler
— Part 13: Operating instructions
Although these parts can be obtained separately, it should be recognized that the parts are inter-
dependent. As such, the design and manufacture of shell boilers requires the application of more than
one part in order for the requirements of the standard to be satisfactorily fulfilled.
NOTE A “Boiler Helpdesk” has been established in CEN/TC 269 which can be contacted for any questions
regarding the application of the European Standards series EN 12952 and EN 12953 see the following website:
http://www.boiler-helpdesk.din.de
1 Scope
This document specifies the following materials for the pressure parts of shell boilers and equipment of
shell boilers (e.g. valves), subjected to internal and external pressure including integral attachments:
— flat products (plate) and parts formed from flat products (e.g. shell, furnace, dished ends);
— tubes and parts formed from tubes (e.g. bending, elbows, reducers, fittings);
— forgings and cast products ;
— bolting materials;
— welding consumables.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 764-4:2014, Pressure equipment - Part 4: Establishment of technical delivery conditions for metallic
materials
EN 1092-1:2018, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 1: Steel flanges
EN 1092-2:2023, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 2: Cast iron flanges
EN 1515-4:2021, Flanges and their joints - Bolting - Part 4: Selection of bolting for equipment subject to
the Pressure Equipment Directive 2014/68/EU
EN 1561:2011, Founding - Grey cast irons
EN 1563:2018, Founding - Spheroidal graphite cast irons
EN 1759-1:2004, Flanges and their joint - Circular flanges for pipes, valves, fittings and accessories, Class
designated - Part 1: Steel flanges, NPS 1/2 to 24
EN 10028-2:2017, Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels
with specified elevated temperature properties
EN 10028-3:2017, Flat products made of steels for pressure purposes - Part 3: Weldable fine grain steels,
normalized
EN 10204:2004, Metallic products - Types of inspection documents
EN 10213:2007+A1:2016, Steel castings for pressure purposes
EN 10216-1:2013, Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 1: Non-
alloy steel tubes with specified room temperature properties
EN 10216-2:2013+A1:2019, Seamless steel tubes for pressure purposes - Technical delivery conditions -
Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10217-1:2019, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 1:
Electric welded and submerged arc welded non-alloy steel tubes with specified room temperature
properties
EN 10217-2:2019, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 2:
Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10217-5:2019, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 5:
Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10222-2:2017+A1:2021, Steel forgings for pressure purposes - Part 2: Ferritic and martensitic steels
with specified elevated temperatures properties
EN 10253-2:2021, Butt-welding pipe fittings - Part 2: Non alloy and ferritic alloy steels with specific
inspection requirements
prEN 12953-1:2024, Shell boilers — Part 1: General
EN 12953-4:2018, Shell boilers - Part 4: Workmanship and construction of pressure parts of the boiler
EN 12953-5:2020, Shell boilers - Part 5: Inspection during construction, documentation and marking of
pressure parts of the boiler
EN 13479:2017, Welding consumables - General product standard for filler metals and fluxes for fusion
welding of metallic materials
EN 14394:2005+A1:2008, Heating boilers - Heating boilers with forced draught burners - Nominal heat
output not exceeding 10 MW and maximum operating temperature of 110 °C
3 Terms and definitions
For the purposes of this document, the terms and definitions given in prEN 12953-1:2024 and
EN 12953-5:2020 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 General requirements for material selection
4.1 General
The materials for the boiler and the parts of the boiler shall fulfil requirements specified in the order
and the requirements of this document.
4.2 Material specification
The selection of materials for pressure parts shall be in accordance with:
a) Harmonized European Standards (see Clause 5);
b) European Approvals for Materials (see 4.3);
c) Particular Material Appraisals (see 4.4).
NOTE If relevant, a technical specification can be issued with additional requirements such as tolerances,
non-destructive examinations (NDE), etc.
For material, it shall
...