EN 12953-4:2018
(Main)Shell boilers - Part 4: Workmanship and construction of pressure parts of the boiler
Shell boilers - Part 4: Workmanship and construction of pressure parts of the boiler
This European Standard specifies requirements for the workmanship and construction of shell boilers as defined in EN 12953-1.
NOTE 1 For other components such as water tube walls, see the EN 12952 series.
NOTE 2 For economizers and superheaters, see EN 12953-4 or EN 12952-5.
Großwasserraumkessel - Teil 4: Verarbeitung und Bauausführung für drucktragende Kesselteile
Diese Europäische Norm legt Anforderungen für die Verarbeitung und Bauausführung von in EN 12953 1 definierten Großwasserraumkesseln fest.
ANMERKUNG 1 Für andere Bauteile wie Wasserrohrwände, siehe Normenreihe EN 12952.
ANMERKUNG 2 Für Vorwärmer und Überhitzer, siehe EN 12953 4 oder EN 12952 5.
Chaudières à tubes de fumée - Partie 4 : Fabrication et construction des parties sous pression des chaudières
La présente Norme européenne spécifie les exigences de fabrication et de construction des chaudières à tubes de fumée telles que définies dans l’EN 12953-1.
NOTE 1 Pour les autres composants, tels que les parois à tubes d’eau, voir la série des EN 12952.
NOTE 2 Pour les économiseurs et les surchauffeurs, voir l'EN 12953-4 ou l'EN 12952-5.
Mnogovodni kotli - 4. del: Izdelava in izvedba tlačno obremenjenih delov kotla
Ta del tega evropskega standarda velja za mnogovodne kotle, kot je opredeljeno v standardu prEN 12953-1. Ta del standarda določa pravila za izdelavo in konstrukcijo mnogovodnih kotlov.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2018
1DGRPHãþD
SIST EN 12953-4:2002
0QRJRYRGQLNRWOLGHO,]GHODYDLQL]YHGEDWODþQRREUHPHQMHQLKGHORYNRWOD
Shell boilers - Part 4: Workmanship and construction of pressure parts of the boiler
Großwasserraumkessel - Teil 4: Verarbeitung und Bauausführung für drucktragende
Kesselteile
Chaudières à tubes de fumée - Partie 4 : Fabrication et construction des parties sous
pression des chaudières
Ta slovenski standard je istoveten z: EN 12953-4:2018
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 12953-4
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2018
EUROPÄISCHE NORM
ICS 27.060.30 Supersedes EN 12953-4:2002
English Version
Shell boilers - Part 4: Workmanship and construction of
pressure parts of the boiler
Chaudières à tubes de fumée - Partie 4 : Fabrication et Großwasserraumkessel - Teil 4: Verarbeitung und
construction des parties sous pression des chaudières Bauausführung für drucktragende Kesselteile
This European Standard was approved by CEN on 6 December 2017.
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, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12953-4:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols . 7
5 General requirements . 7
5.1 General . 7
5.2 Traceability . 8
5.2.1 General . 8
5.2.2 Material . 8
5.2.3 Welding . 8
5.2.4 Inspection (NDT) . 8
5.3 Cylindrical shells . 9
5.4 Tell-tale holes . 11
5.5 End plates and tube plates . 11
5.6 Plain tubes and stay tubes . 11
5.7 Manhole frames and openings . 12
5.7.1 Jointing flanges . 12
5.7.2 Openings for access and inspection . 12
5.8 Connections for accessories . 13
5.8.1 Accessories . 13
5.8.2 Set-in flange and set-on flange . 13
5.8.3 Flanges on nozzles . 13
5.8.4 Bolting . 14
5.9 Cylindrical furnaces . 14
5.10 Water-cooled reversal chamber . 16
5.11 Stays . 16
5.11.1 Bar stays . 16
5.11.2 Girder stays . 17
5.11.3 Tube stays . 17
5.11.4 Non-perpendicular bar stays or tube stays . 17
5.12 Design of welded joints . 17
5.12.1 Weld deposition . 17
5.12.2 Weld crosses . 17
5.12.3 Types of welds . 18
5.12.4 Weld preparations . 19
5.12.5 Welding plates of unequal thickness . 19
5.13 Openings in or adjacent to welds . 19
5.14 Fabrication . 19
5.14.1 General . 19
5.14.2 Welding . 19
5.14.3 Cutting, fitting and alignment . 20
5.14.4 Longitudinal seams . 21
5.14.5 Circumferential seams . 21
5.14.6 Surface condition before welding . 21
5.14.7 Middle line alignments . 21
5.14.8 Surface alignment tolerances . 22
5.14.9 Miscellaneous welding requirements . 23
5.14.10 Repair of weld defects . 24
5.15 Post-weld heat treatment (PWHT) and other heat treatments . 24
5.15.1 General . 24
5.15.2 Material thickness . 24
Annex A (normative) Typical welds for shell boilers . 27
Annex B (informative) Gaskets for closing systems of access and inspection openings . 32
Annex C (informative) Significant technical changes between this European Standard and
the previous edition . 33
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/68/EU aimed to be covered . 34
Bibliography . 35
European foreword
This document (EN 12953-4:2018) 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 September 2018, and conflicting national standards
shall be withdrawn at the latest by September 2018.
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 12953-4:2002.
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(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
The informative Annex C lists the significant technical changes between this European Standard and the
previous edition.
EN 12953, 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 boilers;
— Part 8: Requirements for safeguards against excessive pressure;
— Part 9: Requirements for limiting devices of the boiler and accessories;
— Part 10: Requirements for feedwater and boiler water quality;
— Part 11: Acceptance tests;
— Part 12: Requirements for grate firing systems for solid fuels for the boiler;
— Part 13: Operating instructions;
— Part 14: Guideline for involvement of an inspection body independent of the manufacturer [CR 12953-
14].
Although these parts can be obtained separately, the parts are interdependent. 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 Help
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