EN 12952-2:2021

Water-tube boilers and auxiliary installations - Part 2: Materials for pressure parts of boilers and accessories

This European Standard specifies the requirements for the product forms for use in pressure parts of water-tube boilers and for parts welded on to pressure parts:
   plates;
   wrought seamless tubes;
   electrically welded tubes;
   submerged, plasma and TIG arc-welded tubes;
   forgings;
   castings;
   rolled bars;
   welding consumables;
   fasteners;
   seamless composite tubes.

Wasserrohrkessel und Anlagenkomponenten - Teil 2: Werkstoffe für drucktragende Kesselteile und Zubehör

Chaudières à tubes d'eau et installations auxiliaires - Partie 2: Matériaux des parties sous pression des chaudières et accessoires

Vodocevni kotli in pomožne napeljave - 2. del: Materiali za tlačno obremenjene dele in opremo kotla

Ta evropski standard določa zahteve za oblike izdelkov, ki se uporabljajo v tlačno obremenjenih delih vodocevnih kotlov, in za dele, privarjene na tlačno obremenjene dele:
–   plošče;
–   gnetene nevarjene cevi;
–   električno varjene cevi;
–   obločno pod praškom varjene cevi, plazemsko obločno varjene cevi in cevi, varjene v inertnem plinu z volframovo elektrodo (TIG);
–   izkovke;
–   ulitke;
–   valjane palice;
–   potrošni material za varjenje;
–   vezne elemente;
–   nevarjene kompozitne cevi.

General Information

• Status: Published
• Publication Date: 21-Dec-2021
• Withdrawal Date: 29-Jun-2022
• ICS: 27.040 - Gas and steam turbines. Steam engines
• Technical Committee: CEN/TC 269 - Shell and water tube boilers
• Drafting Committee: CEN/TC 269/WG 1 - Water-tube boilers
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 22-Dec-2021
• Due Date: 26-Aug-2021
• Completion Date: 22-Dec-2021
• 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: SIST EN 12952-2:2022 - Water-tube boilers and auxiliary installations - Part 2: Materials for pressure parts of boilers and accessories

Relations

• Replaces: EN 12952-2:2011 - Water-tube boilers and auxiliary installations - Part 2: Materials for pressure parts of boilers and accessories
• Effective Date: 29-Dec-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2022
Nadomešča:
SIST EN 12952-2:2011
Vodocevni kotli in pomožne napeljave - 2. del: Materiali za tlačno obremenjene
dele in opremo kotla
Water-tube boilers and auxiliary installations - Part 2: Materials for pressure parts of
boilers and accessories
Wasserrohrkessel und Anlagenkomponenten - Teil 2: Werkstoffe für drucktragende
Kesselteile und Zubehör
Chaudières à tubes d'eau et installations auxiliaires - Partie 2: Matériaux des parties
sous pression des chaudières et accessoires
Ta slovenski standard je istoveten z: EN 12952-2:2021
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.

EN 12952-2
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 27.040 Supersedes EN 12952-2:2011
English Version
Water-tube boilers and auxiliary installations - Part 2:
Materials for pressure parts of boilers and accessories
Chaudières à tubes d'eau et installations auxiliaires - Wasserrohrkessel und Anlagenkomponenten - Teil 2:
Partie 2: Matériaux des parties sous pression des Werkstoffe für drucktragende Kesselteile und Zubehör
chaudières et accessoires
This European Standard was approved by CEN on 1 November 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12952-2:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 10
4 General requirements . 10
4.1 Selection of materials with regard to service conditions . 10
4.2 Selection of materials with regard to fabrication . 10
4.3 Material specification . 11
4.3.1 General. 11
4.3.2 European Standards . 11
4.3.3 European approvals for materials . 11
4.3.4 Particular material appraisals . 11
4.4 Consideration of special materials properties . 11
4.5 Contents of material specification . 11
4.6 Compliance and inspection documentation of materials . 12
5 Material for pressure parts . 12
5.1 Materials covered by harmonized European product Standards for pressure purposes
................................................................................................................................................................... 12
5.1.1 Flat products, forgings, castings, tubes, fittings, flanges and valve bodies . 12
5.1.2 Cast iron . 12
5.1.3 Studs, bolts and nuts . 12
5.1.4 Welding consumables . 13
5.1.5 Requirements for plates used for heads . 13
5.1.6 Requirements for non-destructive examination . 13
5.1.7 Marking . 15
5.2 Material covered by European approvals of materials for pressure equipment —
technical requirements . 15
5.2.1 General. 15
5.2.2 Manufacture . 15
5.2.3 Heat treatment condition. 15
5.2.4 Chemical composition . 15
5.2.5 Mechanical and technological properties . 16
5.3 Materials with particular material appraisals . 19
6 Materials for non-pressure parts . 19
Annex A (normative) Materials covered by European material Standards . 20
A.1 Pressure parts . 20
A.2 Fittings . 20
A.3 Flanges . 20
A.4 Valves . 20
Annex B (normative) Establishment of creep rupture strength values for new materials . 33
Annex C (normative) Special requirements for composite tubes . 34
C.1 General . 34
C.2 Special requirements for composite tubing. 34
C.2.1 Composite tubing . 34
C.2.2 General . 34
C.2.3 Chemical composition . 34
C.2.4 Mechanical and technological properties . 34
C.2.4.1 Tensile test of ferritic pressure retaining inner core . 34
C.2.4.2 Ring expanding test (composite tube) . 34
C.2.5 Tolerances . 35
C.2.5.1 Permissible variations in Outside diameter and wall thickness . 35
C.2.5.2 Permissible variations in straightness . 35
C.2.6 Surface finish . 35
C.2.7 Ultrasonic testing . 35
C.2.7.1 Ultrasonic testing of the metallurgical bond in composite tubes . 35
C.2.7.1.1 Extent of testing . 35
C.2.7.1.2 Reference standard . 35
C.2.7.1.3 Acceptance criteria . 35
C.2.7.2 Ultrasonic testing of composite tubes concerning longitudinal and transverse
imperfections . 36
C.2.7.2.1 Method of testing . 36
C.2.7.2.2 Reference standard . 36
C.2.7.2.3 Calibration . 36
C.2.8 Thickness check of stainless steel component . 36
C.2.8.1 General . 36
C.2.8.2 Calibration. 36
C.2.8.3 Acceptance criteria . 36
C.2.9 Summary of tests and examinations . 37
C.3 Marking . 37
C.3.1 General . 37
C.3.2 Additional marking requirements . 37
Annex D (informative) Significant technical changes between this document and the
previous edition . 38
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered . 39
Bibliography . 40

European foreword
This document (EN 12952-2:2021) has been prepared by Technical Committee CEN/TC 269 “Shell and
water-tube boilers”, the secretariat of which is held by DIN.
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 2022, and conflicting national standards shall be
withdrawn at the latest by June 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12952-2:2011.
Annex D provides details of significant technical changes between this document and the previous
edition.
EN 12952 series concerning water-tube boilers and auxiliary installations consists of the following parts:
• Part 1: General;
• Part 2: Materials for pressure part
...