SIST EN 12952-6:2022
(Main)Water-tube boilers and auxiliary installations - Part 6: Inspection during construction; documentation and marking of pressure parts of the boiler
Water-tube boilers and auxiliary installations - Part 6: Inspection during construction; documentation and marking of pressure parts of the boiler
This European Standard specifies requirements for the inspection during construction, documentation and marking of water-tube boilers as defined in EN 12952-1.
Wasserrohrkessel und Anlagenkomponenten - Teil 6: Prüfung während der Herstellung, Dokumentation und Kennzeichnung für drucktragende Kesselteile
Chaudières à tubes d'eau et installations auxiliaires - Partie 6: Contrôles pendant la construction, documentation et marquage des parties sous pression de la chaudière
Vodocevni kotli in pomožne napeljave - 6. del: Kontrola med izdelavo, dokumentacija in označevanje tlačno obremenjenih delov kotla
Ta evropski standard določa zahteve za kontrolo med izdelavo, dokumentiranjem in označevanjem vodocevnih kotlov, kot je določeno v standardu EN 12952-1.
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SLOVENSKI STANDARD
SIST EN 12952-6:2022
01-februar-2022
Nadomešča:
SIST EN 12952-6:2011
Vodocevni kotli in pomožne napeljave - 6. del: Kontrola med izdelavo,
dokumentacija in označevanje tlačno obremenjenih delov kotla
Water-tube boilers and auxiliary installations - Part 6: Inspection during construction;
documentation and marking of pressure parts of the boiler
Wasserrohrkessel und Anlagenkomponenten - Teil 6: Prüfung während der Herstellung,
Dokumentation und Kennzeichnung für drucktragende Kesselteile
Chaudières à tubes d'eau et installations auxiliaires - Partie 6: Contrôles pendant la
construction, documentation et marquage des parties sous pression de la chaudière
Ta slovenski standard je istoveten z: EN 12952-6:2021
ICS:
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
SIST EN 12952-6:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 12952-6:2022
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SIST EN 12952-6:2022
EN 12952-6
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 27.040 Supersedes EN 12952-6:2011
English Version
Water-tube boilers and auxiliary installations - Part 6:
Inspection during construction, documentation and
marking of pressure parts of the boiler
Chaudières à tubes d'eau et installations auxiliaires - Wasserrohrkessel und Anlagenkomponenten - Teil 6:
Partie 6: Contrôles pendant la construction, Prüfung während der Herstellung, Dokumentation und
documentation et marquage des parties sous pression Kennzeichnung für drucktragende Kesselteile
de la chaudière
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 12952-6:2021 E
worldwide for CEN national Members.
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
Contents Page
European foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General organization . 7
4.1 General. 7
4.2 Conformity assessment . 7
4.3 Competency of the manufacturer. 7
4.4 Calibration of equipment . 7
4.5 Inspection activities . 8
5 Non-destructive testing (NDT) of parent materials . 10
6 Production test plates for drums . 10
6.1 General. 10
6.2 Number of production test plates . 10
6.3 Tests required . 11
6.3.1 Non-destructive testing . 11
6.3.2 Destructive tests . 11
6.4 Acceptance criteria. 11
6.4.1 Non-destructive testing . 11
6.4.2 Transverse tensile test . 11
6.4.3 Longitudinal tensile test on weld metal . 12
6.4.4 Bend tests . 12
6.4.5 Impact values . 12
6.4.6 Macroscopic examination . 12
6.4.7 Hardness survey . 12
6.4.8 Dissimilar joints . 12
6.5 Non-conformance of results . 13
6.5.1 General. 13
6.5.2 Specific case for Charpy V-notch impact tests . 13
7 Non-destructive testing of welds . 13
7.1 Type and extent of non-destructive testing . 13
7.1.1 General. 13
7.1.2 Drums and Headers. 14
7.1.3 Tube walls . 15
7.1.4 Pipes and Tubes . 16
7.1.5 Extension procedure of random testing in case of repairs . 18
7.2 Qualification of non-destructive testing (NDT) personnel . 18
7.3 The detection of surface imperfections . 19
7.3.1 General. 19
7.3.2 Visual examination . 19
7.3.3 Penetrant testing . 19
7.3.4 Magnetic particle testing . 19
7.3.5 Acceptance criteria for weld surface imperfections . 20
2
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
7.4 Testing for volumetric imperfections . 22
7.4.1 Radiographic testing . 22
7.4.2 Ultrasonic testing . 25
7.5 Non-destructive testing reports . 26
8 Final inspection . 27
8.1 Visual and dimensional examinations . 27
8.2 Hydrostatic pressure test . 27
8.2.1 General . 27
8.2.2 Test procedure . 27
9 Documentation . 28
10 Marking . 29
Annex A (normative) Special requirements for chemical recovery boilers . 30
A.1 General . 30
A.2 Special requirements for non-destructive testing (NDT) of welds . 30
A.2.1 General . 30
A.2.2 Special requirements for NDT of welds in a chemical recovery boiler - Volumetric
testing . 30
A.2.3 Methods of testing . 30
Annex B (informative) Significant technical changes between this document and the
previous edition . 31
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered . 32
Bibliography . 33
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
European foreword
This document (EN 12952-6:2021) 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 12952-6:2011.
Annex B 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 parts of boilers and accessories;
• Part 3: Design and calculation for pressure parts;
• Part 4: In service boiler life expectancy calculations;
• Part 5: Workmanship and construction of pressure parts of the boiler;
• Part 6: Inspection during construction, documentation and marking of pressure parts of the boiler;
• Part 7: Requirements for equipment for the boiler;
• Part 8: Requirements for firing systems for liquid and gaseous fuels for the boiler;
• Part 9: Requirements for firing systems for pulverized solid fuels for the boiler;
• Part 10: Requirements for safeguards against excessive pressure;
• Part 11: Requirements for limiting devices of the boiler and accessories;
• Part 12: Requirements for boiler feedwater and boiler water quality;
• Part 13: Requirements for flue gas cleaning systems;
• Part 14: Requirements for flue gas DENOX-systems using liquefied pressurized ammonia and ammonia
water solution;
• Part 15: Acceptance tests;
• Part 16: Requirements for grate and fluidized-bed firing systems for solid fuels for the boiler;
• CR 12952 Part 17: Guideline for the involvement of an inspection body independent of the
manufacturer.
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
• Part 18: 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 water-tube boilers requires the application of more
than one part in order for the requirements of the document 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 EN 12952 series and EN 12953 series, see the following website: http://www.boiler-
helpdesk.din.de
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part
of this document.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the United
Kingdom.
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
1 Scope
This document specifies requirements for the inspection during construction, documentation and
marking of water-tube boilers as defined in EN 12952-1:2015.
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 12952-1:2015, Water-tube boilers and auxiliary installations - Part 1: General
EN 12952-2:2021, Water-tube boilers and auxiliary installations — Part 2: Materials for pressure parts of
boilers and accessories
EN 12952-3:2011, Water-tube boilers and auxiliary installations - Part 3: Design and calculation for
pressure parts of the boiler
EN 12952-5:2021, Water-tube boilers and auxiliary installations — Part 5: Workmanship and construction
of pressure parts of the boiler
EN ISO 3452-1:2021, Non-destructive testing - Penetrant testing - Part 1: General principles
(ISO 3452-1:2021)
EN ISO 5817:2014, Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
excluded) - Quality levels for imperfections (ISO 5817:2014)
EN ISO 6520-1:2007, Welding and allied processes - Classification of geometric imperfections in metallic
materials - Part 1: Fusion welding (ISO 6520-1:2007)
EN ISO 9712:2012, Non-destructive testing - Qualification and certification of NDT personnel
(ISO 9712:2012)
EN ISO 11666:2018, Non-destructive testing of welds - Ultrasonic testing - Acceptance levels
(ISO 11666:2018)
EN ISO 13588:2019, Non-destructive testing of welds - Ultrasonic testing - Use of automated phased array
technology (ISO 13588:2019)
EN ISO 15614-1:2017, 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 15614-1:2017, Corrected version 2017-10-01)
EN ISO 17636-1:2013, Non-destructive testing of welds - Radiographic testing - Part 1: X- and gamma-ray
techniques with film (ISO 17636-1:2013)
EN ISO 17636-2:2013, Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray
techniques with digital detectors (ISO 17636-2:2013)
EN ISO 17637:2016, Non-destructive testing of welds - Visual testing of fusion-welded joints
(ISO 17637:2016)
EN ISO 17638:2016, Non-destructive testing of welds - Magnetic particle testing (ISO 17638:2016)
6
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
EN ISO 17640:2018, Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and
assessment (ISO 17640:2018)
CEN ISO/TR 20172:2009, Welding - Grouping systems for materials - European materials
(ISO/TR 20172:2009)
EN ISO 23277:2015, Non-destructive testing of welds - Penetrant testing - Acceptance levels
(ISO 23277:2015)
EN ISO 23278:2015, Non-destructive testing of welds - Magnetic particle testing - Acceptance levels
(ISO 23278:2015)
3 Terms and definitions
For the purposes of this document the terms and definitions given in EN 12952-1:2015 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at http://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/
3.1
inspection
conformity evaluation by observation and judgement accompanied as appropriate by measurement,
testing or gauging
4 General organization
4.1 General
The manufacturer shall be responsible for ensuring the boiler conforms to the requirements of this
document. Conformance shall be confirmed by completing a series of inspection activities as detailed in
Table 1.
Except where explicitly stated otherwise in this document, inspection activities applicable to a
manufacturer’s works shall also be applicable to operations carried out on a construction site.
4.2 Conformity assessment
Guidance in the use of the conformity assessment procedures is given in CR 12952-17:2002.
4.3 Competency of the manufacturer
If an assessment of the competency of the manufacturer is required, guidance is given in EN 12952-
5:2021, Annex F.
4.4 Calibration of equipment
The manufacturer shall establish procedures to ensure that tools, gauges, instruments and other
measuring and testing devices used in the manufacture and inspection activities affecting boiler product
quality, are properly controlled, calibrated and adjusted at specific intervals, to maintain accuracy within
defined limits.
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
4.5 Inspection activities
The manufacturer shall confirm that the boiler components, as a minimum, conform to the requirements
of this document by performing and authenticating the activities listed in Table 1.
Depending upon the conformity assessment module adopted, some of the inspection activities listed
should also be assessed by a responsible authority. For the guidance of the manufacturer, the specific
involvement of such a responsible authority is indicated in CR 12952-17.
Table 1 — List of inspection activities to be undertaken by the manufacturer
Reference Area of activity Inspection operation
1 Design and general documentation
1.1 Design data/ Ensure that the design data/calculations conform to:
calculations
— technical specifications, if applicable;
— the requirements of this document.
1.2 Manufacturing Ensure that drawing information conforms to:
drawings
— design data and calculations;
— technical specifications, if applicable;
— the requirements of this Document.
1.3 Purchase Ensure that material and component specifications conform to:
specifications
— technical specifications, if applicable;
— manufacturing drawings;
— the requirements of this document.
1.4 Specifications for sub- Ensure that the specification for sub-contracted parts conform
contracted parts to:
— technical specifications, if applicable;
— manufacturing drawings;
— the requirements of this document.
2 Material
2.1 Material certificates Verify that certificate information and results conform to the
design specification.
2.2 Welding consumables Verify that the consumables to be used are in accordance with
the design specification.
2.3 Material identification Identify the material with the material certificates and check the
markings.
2.4 Transfer of Ensure that the transfer of identification marks is in accordance
identification marks with the approved procedure.
2.5 Acceptance of sub- Verify that sub-contracted parts conform to the manufacturer’s
contracted parts specification.
3 Manufacturing and welding
3.1 Welding procedure Verify that appropriate welding specifications are available and
specifications that their contents are compatible with the welding procedure
qualifications.
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
Reference Area of activity Inspection operation
3.2 Welding procedure Verify that the welding procedures are appropriate for the
qualifications materials and the field of welding application, and that they have
been approved by a responsible authority.
3.3 Welder qualification/ Verify that the welder/operator qualifications have been
Operator qualification approved by a responsible authority and that they are available
and valid.
3.4 Forming procedures Verify that forming procedures are available, where applicable,
and their contents are appropriate to the product to be formed.
3.5 Joint preparations Examine material cut edges where thermal cutting has been
used and confirm machined preparations are to the correct
profile.
3.6 Formed parts Examine formed parts in accordance with the requirements of
EN 12952-5:2021, Clause 7.
3.7 Weld assembly Examine the weld assembly, including dimensional check.
3.8 Weld root Examine second side of weld assembly, if applicable, after the
first side of weld has been completed and the root cleaned.
3.9 Production test plates, Identify and mark production test plates.
if any
Verify that any PWHT on production test plates independent of
the component complies with the specific heat treatment
applied to the component.
Examine NDT reports on production test plates.
Identify and mark the test specimens taken from production test
plates for mechanical tests.
Verify that the test information and results from the mechanical
tests conform to the requirements of this document.
4 Non-destructive testing (NDT)
4.1 Non-destructive Verify that appropriate non-destructive testing procedures are
testing procedures available and ensure the qualification of the originator is
appropriate.
4.2 Non-destructive Ensure the non-destructive testing operator’s qualifications are
testing operator appropriate and that they have been approved by a responsible
qualifications authority.(cat. III +IV)
4.3 Non-destructive Scrutinize any radiographs and check conformance to the
testing operation acceptance criteria.
Scrutinize the operator’s ultrasonic testing reports.
4.4 Non-destructive Verify that the information and results conform to the
testing reports acceptance criteria.
5 Post-weld heat treatment (PWHT)
5.1 PWHT procedures Verify that the post-weld heat treatment procedures conform to
this document.
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
Reference Area of activity Inspection operation
5.2 PWHT records Verify that temperature/time recordings conform to the
requirements of this document.
6 Final inspection and marking
6.1 Pre-hydrostatic Carry out dimensional checking, visual examination and
pressure test identification of accessible parts after component completion,
inspection prior to hydrostatic pressure test.
6.2 Hydrostatic pressure Ensure the final hydrostatic pressure test is carried out in
test accordance with the requirements of this document.
6.3 Post-hydrostatic Perform visual examination on completion of the hydrostatic
pressure test pressure test.
inspection
Check marking on nameplate.
6.4 Safety devices Ensure the provision of safety equipment.
6.5 Manufacturer’s data Ensure completeness of the data dossier — see Clause 9.
dossier
5 Non-destructive testing (NDT) of parent materials
The NDT of parent materials shall be in accordance with EN 12952-2:2021.
6 Production test plates for drums
6.1 General
The material used for production test plates shall comply with the same standard and grade, or the same
specification, as that used for the construction of the drums of the water-tube boiler. As a minimum, plates
shall be from the same steel making process and of the same nominal thickness as the drum plates. Where
possible, the plates shall be selected from the same cast as that used for the manufacture of the drum.
The dimensions of the test plates shall be large enough to allow the preparation of all the test specimens
required by 6.3.2, and in no case shall their length be shorter than 350 mm.
The test plates shall be attached, wherever practical, to the drum plate so that the weld carried out on the
production test plate is a continuation of the longitudinal weld.
Production test plates shall receive an identical post-weld heat treatment or stress relief as that applied
to the production weld.
6.2 Number of production test plates
The number of production test plates required shall be as follows:
a) longitudinal welds: One production test plate per welding procedure qualification per drum and per
header;
b) circumferential welds: If the welding procedure qualification is the same as that for the longitudinal
seam of the drum, no additional production test plate is required. If the welding procedure
qualification differs from that of the longitudinal joint, then one production test plate shall be
performed per welding procedure qualification per year.
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SIST EN 12952-6:2022
EN 12952-6:2021 (E)
6.3 Tests required
6.3.1 Non-destructive testing
The test plates shall be subjected to non-destructive testing identical with the production welds they are
representing.
6.3.2 Destructive tests
The test plates and methods of testing shall be in accordance with the requirements of EN ISO 15614-
1:2017, Level 2 for welding procedure qualification.
The following destructive test shall be performed on each production test plate:
a) 1 transverse tensile test at room temperature;
b) 1 longitudinal tensile test on weld metal for production test plates with thickness greater or equal to
20 mm. The test shall be performed at the design temperatu
...
SLOVENSKI SIST EN 12952-6
STANDARD februar 2022
Vodocevni kotli in pomožne napeljave – 6. del: Kontrola med izdelavo,
dokumentacija in označevanje tlačno obremenjenih delov kotla
Water-tube boilers and auxiliary installations – Part 6: Inspection during
construction; documentation and marking of pressure parts of the boiler
Wasserrohrkessel und Anlagenkomponenten – Teil 6: Prüfung während der
Herstellung, Dokumentation und Kennzeichnung für drucktragende Kesselteile
Chaudières à tubes d'eau et installations auxiliaires – Partie 6: Contrôles pendant
la construction, documentation et marquage des parties sous pression de la
chaudière
Referenčna oznaka
ICS 27.040 SIST EN 12952-6:2022 (sl)
Nadaljevanje na straneh II in III ter od 1 do 32
2022-10: Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno.
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SIST EN 12952-6 : 2022
NACIONALNI UVOD
Standard SIST EN 12952-6 (sl), Vodocevni kotli in pomožne napeljave – 6. del: Kontrola med izdelavo,
dokumentacija in označevanje tlačno obremenjenih delov kotla, 2022, ima status slovenskega
standarda in je istoveten evropskemu standardu EN 12952-6 (en), Water-tube boilers and auxiliary
installations – Part 6: Inspection during construction; documentation and marking of pressure parts of
the boiler, 2021.
Ta standard nadomešča SIST EN 12952-6:2011.
NACIONALNI PREDGOVOR
Evropski standard EN 12952-6:2021 je pripravil tehnični odbor Evropskega komiteja za standardizacijo
CEN/TC 269 "Mnogovodni in vodocevni kotli", katerega sekretariat vodi DIN.
Slovenski standard SIST EN 12952-6:2022 je prevod evropskega standarda EN 12952-6:2021. V
primeru spora glede besedila slovenskega prevoda v tem standardu je odločilen izvirni evropski
standard v angleškem jeziku. Slovensko izdajo standarda je pripravil tehnični odbor SIST/TC TLP
Tlačne posode.
Odločitev za privzem tega standarda je 17. januarja 2022 sprejel tehnični odbor SIST/TC TLP Tlačne
posode.
ZVEZA S STANDARDI
S privzemom tega evropskega standarda veljajo za omejeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:
SIST EN 12952-1:2016 Vodocevni kotli in pomožne napeljave – 1. del: Splošno
SIST EN 12952-2:2022 Vodocevni kotli in pomožne napeljave – 2. del: Materiali za tlačno
obremenjene dele in opremo kotla
SIST EN 12952-3:2012 Vodocevni kotli in pomožne napeljave – 3. del: Konstruiranje in izračun
tlačno obremenjenih delov
SIST EN 12952-5:2022 Vodocevni kotli in pomožne napeljave – 5. del: Izdelava in izvedba tlačno
obremenjenih delov kotla
SIST EN ISO 3452-1:2021 Neporušitvene preiskave – Pregled s penetranti – 1. del: Splošna načela
(ISO 3452-1:2021)
SIST EN ISO 5817:2014 Varjenje – Talilno zvarjeni spoji na jeklu, niklju, titanu in njihovih zlitinah
(varjenje s snopom izključeno) – Stopnje sprejemljivosti nepopolnosti
(ISO 5817:2014)
SIST EN ISO 6520-1:2008 Varjenje in sorodni postopki – Klasifikacija geometrijskih nepopolnosti v
kovinskih materialih – 1. del: Talilno varjenje (ISO 6520-1:2007)
SIST EN ISO 9712:2012 Neporušitvene preiskave – Kvalificiranje in certificiranje osebja za
neporušitvene preiskave – Splošna načela (ISO 9712:2012)
SIST EN ISO 11666:2018 Neporušitveno preskušanje zvarnih spojev – Ultrazvočno preskušanje –
Stopnje sprejemljivosti (ISO 11666:2018)
SIST EN ISO 13588:2019 Neporušitveno preskušanje zvarnih spojev – Ultrazvočno preskušanje –
Uporaba avtomatske tehnike s faznim krmiljenjem (FA-tehnika)
(ISO 13588:2019)
II
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SIST EN 12952-6 : 2022
SIST EN ISO 15614-1:2017 Popis in kvalifikacija varilnih postopkov za kovinske materiale – Preskus
varilnega postopka – 1. del: Obločno in plamensko varjenje jekel in
obločno varjenje niklja in nikljevih zlitin (ISO 15614-1:2017, popravljena
verzija 2017-10-01)
SIST EN ISO 17636-1:2013 Neporušitveno preskušanje zvarnih spojev – Radiografske preiskave –
1. del: X- in gama žarki z uporabo filmov (ISO 17636-1:2013)
SIST EN ISO 17636-2:2013 Neporušitvene preiskave zvarnih spojev – Radiografske preiskave –
2. del: X- in gama žarki z uporabo digitalnih detektorjev
(ISO 17636-2:2013)
SIST EN ISO 17637:2017 Neporušitveno preskušanje zvarov – Vizualni pregled zvarnih spojev pri
talilnem varjenju (ISO 17637:2016)
SIST EN ISO 17638:2017 Neporušitveno preskušanje zvarov – Preskušanje z magnetnimi delci
(ISO 17638:2016)
SIST EN ISO 17640:2019 Neporušitveno preskušanje zvarnih spojev – Ultrazvočno preskušanje
– Tehnike, stopnje preskušanja in ocenjevanje (ISO 17640:2018)
SIST-TP CEN ISO/TR 20172:2013 Varjenje – Razvrščanje materialov v skupine – Evropski materiali
(ISO/TR 20172:2009)
SIST EN ISO 23277:2015 Neporušitvene preiskave zvarnih spojev – Preiskave zvarnih spojev s
penetranti – Stopnje sprejemljivosti (ISO 23277:2015)
SIST EN ISO 23278:2015 Neporušitvene preiskave zvarnih spojev – Preiskave zvarnih spojev z
magnetnimi delci – Stopnje sprejemljivosti (ISO 23278:2015)
OSNOVA ZA IZDAJO STANDARDA
– privzem evropskega standarda EN 12952-6:2021
OPOMBE
– Povsod, kjer se v besedilu standarda uporablja izraz "evropski standard", v SIST EN 12952-6:2022
to pomeni "slovenski standard".
– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.
– Ta nacionalni dokument je istoveten EN 12952-6:2021 in je objavljen z dovoljenjem
Upravni center
CEN-CENELEC
Rue de la Science 23
B-1040 Bruselj
This national document is identical with EN 12952-6:2021 and is published with the permission of
CEN- CENELEC
Management Centre
Rue de la Science 23
B-1040 Brussels
III
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SIST EN 12952-6 : 2022
IV
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EVROPSKI STANDARD EN 12952-6
EUROPEAN STANDARD
NORME EUROPÉENNE
december 2021
EUROPÄISCHE NORM
ICS 27.040 Nadomešča EN 12952-6:2011
Slovenska izdaja
Vodocevni kotli in pomožne napeljave – 6. del: Kontrola med izdelavo,
dokumentacija in označevanje tlačno obremenjenih delov kotla
Water-tube boilers and auxiliary Chaudières à tubes d'eau et Wasserrohrkessel und
installations – Part 6: Inspection installations auxiliaires – Anlagenkomponenten – Teil 6:
during construction; Partie 6: Contrôles pendant la Prüfung während der
documentation and marking of construction, documentation et Herstellung, Dokumentation und
pressure parts of the boiler marquage des parties sous Kennzeichnung für
pression de la chaudière drucktragende Kesselteile
Ta evropski standard je CEN sprejel 1. novembra 2021.
Člani CEN morajo izpolnjevati določila notranjih predpisov CEN/CENELEC, s katerimi je predpisano,
da mora biti ta evropski standard brez kakršnih koli sprememb sprejet kot nacionalni standard.
Seznami najnovejših izdaj teh nacionalnih standardov in njihovi bibliografski podatki so na voljo na
zahtevo pri Upravnem centru CEN-CENELEC ali katerem koli članu CEN.
Ta evropski standard obstaja v treh uradnih izdajah (angleški, francoski in nemški). Izdaje v drugih
jezikih, ki jih člani CEN na lastno odgovornost prevedejo in izdajo ter prijavijo pri Upravnem centru
CEN-CENELEC, veljajo kot uradne izdaje.
Člani CEN so nacionalni organi za standarde Avstrije, Belgije, Bolgarije, Cipra, Češke republike,
Danske, Estonije, Finske, Francije, Grčije, Hrvaške, Irske, Islandije, Italije, Latvije, Litve,
Luksemburga, Madžarske, Malte, Nemčije, Nizozemske, Norveške, Poljske, Portugalske, Republike
Severna Makedonija, Romunije, Slovaške, Slovenije, Srbije, Španije, Švedske, Švice, Turčije in
Združenega kraljestva.
CEN
Evropski komite za standardizacijo
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung
Upravni center CEN-CENELEC: Rue de la Science 23, B-1040 Bruselj
© 2021 CEN Vse pravice do izkoriščanja v kakršnikoli obliki in na kakršenkoli Ref. oznaka EN 12952-6:2021 E
način imajo nacionalni člani CEN.
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SIST EN 12952-6 : 2022
VSEBINA Stran
Evropski predgovor . 4
1 Področje uporabe . 6
2 Zveze s standardi . 6
3 Izrazi in definicije . 7
4 Splošna organizacija . 7
4.1 Splošno . 7
4.2 Ugotavljanje skladnosti . 7
4.3 Usposobljenost proizvajalca . 7
4.4 Umerjanje opreme . 7
4.5 Kontrolne dejavnosti . 8
5 Neporušitveno preskušanje (NDT) osnovnih materialov . 10
6 Preskusne plošče za delovne preskuse za bobne . 10
6.1 Splošno . 10
6.2 Število preskusnih plošč . 10
6.3 Zahtevani preskusi . 10
6.3.1 Neporušitveno preskušanje . 10
6.3.2 Porušitveni preskusi . 10
6.4 Kriteriji sprejemljivosti . 11
6.4.1 Neporušitveno preskušanje . 11
6.4.2 Prečni natezni preskus . 11
6.4.3 Vzdolžni natezni preskus čistega vara . 11
6.4.4 Upogibni preskusi . 11
6.4.5 Vrednosti udarne žilavosti . 11
6.4.6 Makroskopski pregled . 12
6.4.7 Nadzor trdote . 12
6.4.8 Raznovrstni spoji . 12
6.5 Neskladnost rezultatov . 12
6.5.1 Splošno . 12
6.5.2 Poseben primer za udarne preskuse po Charpyju z V-zarezo . 13
7 Neporušitveno preskušanje zvarov . 13
7.1 Vrsta in obseg neporušitvenega preskušanja . 13
7.1.1 Splošno . 13
7.1.2 Bobni in zbiralne komore . 14
7.1.3 Cevne stene . 15
7.1.4 Cevovodi in cevi . 16
7.1.5 Postopek razširitve preskušanja naključno izbranih vzorcev v primeru popravil . 18
7.2 Kvalifikacija osebja za neporušitveno preskušanje (NDT) . 18
7.3 Odkrivanje površinskih nepravilnosti . 18
7.3.1 Splošno . 18
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SIST EN 12952-6 : 2022
7.3.2 Vizualni pregled . 19
7.3.3 Preskušanje s penetranti (PT) . 19
7.3.4 Preskušanje z magnetnimi delci (MT) . 19
7.3.5 Kriteriji sprejemljivosti za površinske nepravilnosti zvarov . 20
7.4 Preskušanje za odkrivanje volumetričnih nepravilnosti . 22
7.4.1 Radiografsko preskušanje (RT) . 22
7.4.2 Ultrazvočno preskušanje (UT) . 25
7.5 Poročila o neporušitvenem preskušanju . 26
8 Končna kontrola . 26
8.1 Vizualni in dimenzijski pregledi . 26
8.2 Hidrostatični tlačni preskus . 27
8.2.1 Splošno . 27
8.2.2 Preskusni postopek . 27
9 Dokumentacija . 28
10 Označevanje . 28
Dodatek A (normativni): Posebne zahteve za kotle na odpadno gorivo . 29
A.1 Splošno . 29
A.2 Posebne zahteve za neporušitveno preskušanje (NDT) zvarov . 29
A.2.1 Splošno . 29
A.2.2 Posebne zahteve za neporušitveno preskušanje zvarov v kotlu na odpadno gorivo –
Volumetrično preskušanje . 29
A.2.3 Metode preskušanja . 29
Dodatek B (informativni): Pomembne tehnične spremembe med tem dokumentom in
predhodno izdajo . 30
Dodatek ZA (informativni): Povezava med tem evropskim standardom in bistvenimi zahtevami
Direktive 2014/68/EU, na katere se nanaša . 31
Literatura . 32
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SIST EN 12952-6 : 2022
Evropski predgovor
Ta dokument (EN 12952-6:2021) je pripravil tehnični odbor CEN/TC 269 "Mnogovodni in vodocevni
kotli", katerega sekretariat vodi DIN.
Ta evropski standard mora dobiti status nacionalnega standarda bodisi z objavo istovetnega besedila
ali z razglasitvijo najpozneje do junija 2022, nacionalne standarde, ki so v nasprotju s tem standardom,
pa je treba razveljaviti najpozneje do junija 2022.
Opozoriti je treba na možnost, da so lahko nekateri elementi tega dokumenta predmet patentnih pravic.
CEN ni odgovoren za ugotavljanje posameznih ali vseh takih patentnih pravic.
Ta dokument nadomešča standard EN 12952-6:2011.
V dodatku B so podrobno opisane pomembne tehnične spremembe med to in predhodno izdajo tega
dokumenta.
Skupino EN 12952, ki obravnava vodocevne kotle in pomožne napeljave, sestavljajo naslednji deli:
‒ 1. del: Splošno
‒ 2. del: Materiali za tlačno obremenjene dele in opremo kotla
‒ 3. del: Konstruiranje in izračun tlačno obremenjenih delov
‒ 4. del: Izračun pričakovane življenjske dobe obratovanja
‒ 5. del: Izdelava in izvedba tlačno obremenjenih delov kotla
‒ 6. del: Kontrola med izdelavo, dokumentacija in označevanje tlačno obremenjenih delov kotla
‒ 7. del: Zahteve za opremo kotla
‒ 8. del: Zahteve za gorilnike kotlov na tekoča in plinasta goriva
‒ 9. del: Zahteve za gorilnike kotlov na premogov prah
‒ 10. del: Zahteve za opremo in varnostne naprave za preprečevanje prekoračitve tlaka
‒ 11. del: Zahteve za omejilne naprave kotla in opremo
‒ 12. del: Zahteve za kakovost napajalne in kotelne vode
‒ 13. del: Zahteve za čistilne naprave dimnih plinov
‒ 14. del: Zahteve za naprave dimnih plinov DENOX na tekoči amoniak in vodno raztopino amoniaka
‒ 15. del: Prevzemni preskusi
‒ 16. del: Zahteve za kurilne sisteme na trdna goriva z zgorevalno rešetko ali z lebdečo plastjo
‒ CR 12952 – 17. del: Smernice za vključevanje kontrolnega organa, neodvisnega od proizvajalca
‒ 18. del: Navodila za obratovanje
Čeprav je te dele mogoče pridobiti posamično, je treba upoštevati, da so deli medsebojno odvisni. Zato
je treba pri konstruiranju in proizvodnji vodocevnih kotlov uporabljati več delov, da so zahteve
dokumenta zadovoljivo izpolnjene.
OPOMBA: CEN/TC 269 je vzpostavil "Službo za pomoč v zvezi s kotli", na katero se je mogoče obrniti v primeru kakršnihkoli
vprašanj glede uporabe evropskih standardov skupine EN 12952 in EN 12953; glej naslednje spletno mesto:
http://www.boiler-helpdesk.din.de
Ta dokument je bil pripravljen na podlagi mandata, ki sta ga Evropska komisija in Evropsko združenje
za prosto trgovino podelila CEN, in podpira bistvene zahteve direktiv/uredb EU.
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SIST EN 12952-6 : 2022
Za povezavo z direktivami/uredbami EU glej informativni dodatek ZA, ki je sestavni del tega dokumenta.
Uporabnik naj vse povratne informacije ali vprašanja v zvezi s tem dokumentom posreduje
nacionalnemu organu za standarde v svoji državi. Celoten seznam teh organov je na voljo na spletnem
mestu CEN.
V skladu z notranjimi predpisi CEN-CENELEC morajo ta evropski standard obvezno uvesti nacionalne
organizacije za standardizacijo naslednjih držav: Avstrije, Belgije, Bolgarije, Cipra, Češke republike,
Danske, Estonije, Finske, Francije, Grčije, Hrvaške, Irske, Islandije, Italije, Latvije, Litve, Luksemburga,
Madžarske, Malte, Nemčije, Nizozemske, Norveške, Poljske, Portugalske, Republike Severna
Makedonija, Romunije, Slovaške, Slovenije, Srbije, Španije, Švedske, Švice, Turčije in Združenega
kraljestva.
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SIST EN 12952-6 : 2022
1 Področje uporabe
Ta dokument določa zahteve za kontrolo med izdelavo, dokumentacijo in označevanje vodocevnih
kotlov, kot je določeno v standardu EN 12952-1:2015.
2 Zveze s standardi
Naslednji dokumenti so v besedilu navedeni tako, da nekateri njihovi deli ali celotna vsebina
predstavljajo zahteve tega dokumenta. Pri datiranih sklicevanjih se uporablja samo navedena izdaja.
Pri nedatiranih sklicevanjih se uporablja zadnja izdaja dokumenta, na katerega se sklicuje (vključno z
morebitnimi dopolnili).
EN 12952-1:2015 Vodocevni kotli in pomožne napeljave – 1. del: Splošno
EN 12952-2:2021 Vodocevni kotli in pomožne napeljave – 2. del: Materiali za tlačno
obremenjene dele in opremo kotla
EN 12952-3:2011 Vodocevni kotli in pomožne napeljave – 3. del: Konstruiranje in izračun tlačno
obremenjenih delov
EN 12952-5:2021 Vodocevni kotli in pomožne napeljave – 5. del: Izdelava in izvedba tlačno
obremenjenih delov kotla
EN ISO 3452-1:2021 Neporušitvene preiskave – Preskušanje s penetranti – 1. del: Splošna načela
(ISO 3452-1:2021)
EN ISO 5817:2014 Varjenje – Talilno zvarjeni spoji na jeklu, niklju, titanu in njihovih zlitinah
(varjenje s snopom izključeno) – Stopnje sprejemljivosti nepopolnosti
(ISO 5817:2014)
EN ISO 6520-1:2007 Varjenje in sorodni postopki – Klasifikacija geometrijskih nepopolnosti v
kovinskih materialih – 1. del: Talilno varjenje (ISO 6520-1:2007)
EN ISO 9712:2012 Neporušitvene preiskave – Kvalificiranje in certificiranje osebja za
neporušitvene preiskave – Splošna načela (ISO 9712:2012)
EN ISO 11666:2018 Neporušitveno preskušanje zvarnih spojev – Ultrazvočno preskušanje –
Stopnje sprejemljivosti (ISO 11666:2018)
EN ISO 13588:2019 Neporušitveno preskušanje zvarnih spojev – Ultrazvočno preskušanje –
Uporaba avtomatske tehnike s faznim krmiljenjem (FA-tehnika)
(ISO 13588:2019)
EN ISO 15614-1:2017 Popis in kvalifikacija varilnih postopkov za kovinske materiale – Preskus
varilnega postopka – 1. del: Obločno in plamensko varjenje jekel in obločno
varjenje niklja in nikljevih zlitin (ISO 15614-1:2017, popravljena verzija 2017-
10-01)
EN ISO 17636-1:2013 Neporušitveno preskušanje zvarnih spojev – Radiografske preiskave –
1. del: X- in gama žarki z uporabo filmov (ISO 17636-1:2013)
EN ISO 17636-2:2013 Neporušitvene preiskave zvarnih spojev – Radiografske preiskave –
2. del: X- in gama žarki z uporabo digitalnih detektorjev (ISO 17636-2:2013)
EN ISO 17637:2016 Neporušitveno preskušanje zvarov – Vizualni pregled zvarnih spojev pri
talilnem varjenju (ISO 17637:2016)
EN ISO 17638:2016 Neporušitveno preskušanje zvarov – Preskušanje z magnetnimi delci
(ISO 17638:2016)
EN ISO 17640:2018 Neporušitveno preskušanje zvarnih spojev – Ultrazvočno preskušanje –
Tehnike, stopnje preskušanja in ocenjevanje (ISO 17640:2018)
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CEN ISO/TR 20172:2009 Varjenje – Razvrščanje materialov v skupine – Evropski materiali
(ISO/TR 20172:2009)
EN ISO 23277:2015 Neporušitvene preiskave zvarnih spojev – Preiskave zvarnih spojev s
penetranti – Stopnje sprejemljivosti (ISO 23277:2015)
EN ISO 23278:2015 Neporušitvene preiskave zvarnih spojev – Preiskave zvarnih spojev z
magnetnimi delci – Stopnje sprejemljivosti (ISO 23278:2015)
3 Izrazi in definicije
V tem dokumentu se uporabljajo izrazi in definicije, navedeni v standardu EN 12952-1:2015, in naslednji.
ISO in IEC hranita terminološke zbirke podatkov za uporabo pri standardizaciji na naslednjih naslovih:
‒ brskanje po spletni strani ISO: na voljo na spletnem mestu http://www.iso.org/obp
‒ IEC Electropedia: na voljo na spletnem mestu http://www.electropedia.org/
3.1
kontrola
ocenjevanje skladnosti s pregledom in presojo, ki po potrebi vključuje merjenje, preskušanje ali
primerjavo
4 Splošna organizacija
4.1 Splošno
Proizvajalec je odgovoren za zagotavljanje skladnosti kotla z zahtevami tega dokumenta. Skladnost je
treba potrditi z vrsto kontrolnih dejavnosti, kot je podrobneje opisano v preglednici 1.
Kontrolne dejavnosti, ki se uporabljajo pri proizvodnji, se smejo uporabljati tudi pri postopkih, ki se
izvajajo na mestu vgradnje, razen kadar je v tem dokumentu izrecno navedeno drugače.
4.2 Ugotavljanje skladnosti
Navodilo za uporabo postopkov ugotavljanja skladnosti je podano v tehničnem poročilu CR
12952- 17:2002.
4.3 Usposobljenost proizvajalca
Če je zahtevana ocena usposobljenosti proizvajalca, je navodilo podano v dodatku F standarda
EN 12952-5:2021.
4.4 Umerjanje opreme
Proizvajalec mora vzpostaviti postopke za zagotavljanje ustreznega nadzora, umerjanja in nastavitve
orodij, merilnikov, instrumentov ter drugih merilnih in preskuševalnih naprav za uporabo pri proizvodnih
in kontrolnih dejavnostih, ki vplivajo na kakovost kotlov, in sicer ob določenih intervalih, da se ohrani
točnost znotraj določenih omejitev.
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4.5 Kontrolne dejavnosti
Proizvajalec mora potrditi, da so deli kotlov v skladu vsaj z zahtevami tega dokumenta, tako da izvede
in overi kontrolne dejavnosti, navedene v preglednici 1.
Glede na izbrani modul ugotavljanja skladnosti naj nekatere od naštetih kontrolnih dejavnosti oceni tudi
pristojni organ. Kot navodilo za proizvajalca je vključevanje takšnega pristojnega organa opredeljeno v
tehničnem poročilu CR 12952-17.
Preglednica 1: Seznam kontrolnih dejavnosti, ki jih mora izvesti proizvajalec
Sklic Področje dejavnosti Kontrolni postopek
1 Konstruiranje in splošna dokumentacija
1.1 Konstrukcijski Zagotoviti je treba, da so konstrukcijski podatki/izračuni v skladu:
podatki/izračuni
‒ s tehničnimi specifikacijami, če je ustrezno;
‒ z zahtevami tega dokumenta.
1.2 Proizvodni načrti Zagotoviti je treba, da so podatki načrta v skladu:
‒ s konstrukcijskimi podatki in izračuni;
‒ s tehničnimi specifikacijami, če je ustrezno;
‒ z zahtevami tega dokumenta.
Specifikacije za Zagotoviti je treba, da so specifikacije materialov in sestavnih delov
1.3
dobavitelje kotla v skladu:
‒ s tehničnimi specifikacijami, če je ustrezno;
‒ s proizvodnimi načrti;
‒ z zahtevami tega dokumenta.
1.4 Specifikacije za Zagotoviti je treba, da je specifikacija za podpogodbene dele v skladu:
podpogodbene dele
‒ s tehničnimi specifikacijami, če je ustrezno;
‒ s proizvodnimi načrti;
‒ z zahtevami tega dokumenta.
2 Material
2.1 Certifikati o materialih Preveriti je treba, ali so podatki certifikatov in rezultati v skladu s
specifikacijo konstruiranja.
2.2 Dodajni materiali za Preveriti je treba, ali so dodajni materiali, ki bodo uporabljeni, v skladu
varjenje s specifikacijo konstruiranja.
2.3 Označevanje materialov Materiale je treba identificirati s certifikati o materialih in preveriti
oznake.
2.4 Zagotoviti je treba, da je prenos identifikacijskih oznak v skladu z
Prenos
odobrenim postopkom.
identifikacijskih oznak
2.5 Sprejemljivost Preveriti je treba, ali so podpogodbeni deli v skladu s specifikacijo
podpogodbenih delov proizvajalca kotla.
3 Proizvodnja in varjenje
3.1 Popis varilnih postopkov Preveriti je treba, ali so na voljo ustrezni popisi varilnih postopkov in ali
je njihova vsebina v skladu s kvalifikacijami varilnih postopkov.
3.2 Kvalifikacija varilnih Preveriti je treba, ali so varilni postopki primerni za materiale in
postopkov področje uporabe varjenja ter ali jih je odobril pristojni organ.
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Sklic Področje dejavnosti Kontrolni postopek
3.3 Kvalifikacija Preveriti je treba, ali je kvalifikacije varilcev/varilnih operaterjev odobril
varilcev/varilnih pristojni organ ter ali so na voljo in veljavne.
operaterjev
3.4 Postopki preoblikovanja Preveriti je treba, ali so postopki preoblikovanja na voljo, kadar je to
primerno, in ali je njihova vsebina v skladu z izdelkom, ki bo
preoblikovan.
3.5 Priprava zvarnih robov Pregledati je treba odrezane robove materiala, pri katerem je bilo
uporabl
...
SLOVENSKI STANDARD
oSIST prEN 12952-6:2020
01-marec-2020
Vodocevni kotli in pomožne napeljave - 6. del: Kontrola med izdelavo,
dokumentacija in označevanje tlačno obremenjenih delov kotla
Water-tube boilers and auxiliary installations - Part 6: Inspection during construction;
documentation and marking of pressure parts of the boiler
Wasserrohrkessel und Anlagenkomponenten - Teil 6: Prüfung während der Herstellung,
Dokumentation und Kennzeichnung für drucktragende Kesselteile
Chaudières à tubes d'eau et installations auxiliaires - Partie 6: Contrôles pendant la
construction, documentation et marquage des parties sous pression de la chaudière
Ta slovenski standard je istoveten z: prEN 12952-6
ICS:
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
oSIST prEN 12952-6:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 12952-6:2020
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oSIST prEN 12952-6:2020
DRAFT
EUROPEAN STANDARD
prEN 12952-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2020
ICS 27.040 Will supersede EN 12952-6:2011
English Version
Water-tube boilers and auxiliary installations - Part 6:
Inspection during construction; documentation and
marking of pressure parts of the boiler
Chaudières à tubes d'eau et installations auxiliaires - Wasserrohrkessel und Anlagenkomponenten - Teil 6:
Partie 6: Contrôles pendant la construction, Prüfung während der Herstellung, Dokumentation und
documentation et marquage des parties sous pression Kennzeichnung für drucktragende Kesselteile
de la chaudière
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, Turkey 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12952-6:2020 E
worldwide for CEN national Members.
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Contents Page
European foreword . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General organization . 8
4.1 General. 8
4.2 Conformity assessment . 9
4.3 Competency of the manufacturer. 9
4.4 Calibration of equipment . 9
4.5 Inspection activities . 9
5 Non-destructive testing (NDT) of parent materials . 11
6 Qualification of welding procedure specification . 11
6.1 General. 11
6.2 Application of EN ISO 15614-1:2017, Level 2 . 12
6.2.1 Tests required . 12
6.2.2 Mechanical tests . 12
7 Welder and welding operator qualification . 14
8 Production test plates for drums . 14
8.1 General. 14
8.2 Number of production test plates . 14
8.3 Tests required . 15
8.3.1 Non-destructive testing . 15
8.3.2 Destructive tests . 15
8.4 Acceptance criteria. 15
8.4.1 Non-destructive testing . 15
8.4.2 Transverse tensile test . 16
8.4.3 Longitudinal tensile test on weld metal . 16
8.4.4 Bend tests . 16
8.4.5 Impact values . 16
8.4.6 Macroscopic examination . 16
8.4.7 Hardness survey . 16
8.4.8 Dissimilar joints . 17
8.5 Non-conformance of results . 17
8.5.1 General. 17
8.5.2 Specific case for Charpy V-notch impact tests . 17
9 Non-destructive testing of welds . 17
9.1 Type and extent of non-destructive testing . 17
9.1.1 General. 17
9.1.2 Drums and Headers. 19
9.1.3 Tube walls . 19
9.1.4 Pipes and Tubes . 20
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9.1.5 Extension procedure of random testing in case of repairs . 22
9.2 Qualification of non-destructive testing (NDT) personnel . 22
9.3 The detection of surface imperfections . 23
9.3.1 General . 23
9.3.2 Visual examination . 23
9.3.3 Penetrant testing . 23
9.3.4 Magnetic particle testing . 23
9.3.5 Acceptance criteria for weld surface imperfections . 24
9.4 Testing for volumetric imperfections . 26
9.4.1 Radiographic testing . 26
9.4.2 Ultrasonic testing . 29
9.5 Non-destructive testing reports . 30
10 Final inspection . 31
10.1 Visual and dimensional examinations . 31
10.2 Hydrostatic pressure test . 31
10.2.1 General . 31
10.2.2 Test procedure . 31
11 Documentation . 32
12 Marking . 33
Annex A (normative) Special requirements for chemical recovery boilers . 34
A.1 General . 34
A.2 Special requirements of qualification of welding procedures for fusion welding . 34
A.2.1 General . 34
A.2.2 Application of EN ISO 15614-1:2017, Level 2 to composite tubes . 34
A.2.2.1 Range of qualification . 34
A.2.2.2 Additional tests required . 34
A.2.2.2.1 Depth of penetration of clad weld . 34
A.2.2.2.2 Hardness test . 35
A.2.2.2.3 Bend test . 35
A.2.2.2.4 Transverse tensile test . 35
A.2.2.2.5 Microscopic examination . 35
A.3 Special requirements for welder’s qualification for fusion welding of composite
tubes . 35
A.3.1 General . 35
A.3.2 Application of EN ISO 9606-1:2017 to composite tubes . 35
A.3.2.1 Range of qualification . 35
A.3.2.2 Additional tests required - Macroscopic examination . 35
A.4 Special requirements for non-destructive testing (NDT) of welds . 36
A.4.1 General . 36
A.4.2 Special requirements for NDT of welds in a chemical recovery boiler - Volumetric
testing . 36
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Annex B (informative) Significant technical changes between this document and the
previous edition . 37
B.1 General. 37
B.2 Methods of testing . 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
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European foreword
This document (prEN 12952-6:2020) 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.
This document will supersede EN 12952-6:2011.
Annex B 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 parts of boilers and accessories;
• Part 3: Design and calculation for pressure parts;
• Part 4: In service boiler life expectancy calculations;
• Part 5: Workmanship and construction of pressure parts of the boiler;
• Part 6: Inspection during construction, documentation and marking of pressure parts of the boiler;
• Part 7: Requirements for equipment for the boiler;
• Part 8: Requirements for firing systems for liquid and gaseous fuels for the boiler;
• Part 9: Requirements for firing systems for pulverized solid fuels for the boiler;
• Part 10: Requirements for safeguards against excessive pressure;
• Part 11: Requirements for limiting devices of the boiler and accessories;
• Part 12: Requirements for boiler feedwater and boiler water quality;
• Part 13: Requirements for flue gas cleaning systems;
• Part 14: Requirements for flue gas DENOX-systems using liquefied pressurized ammonia and ammonia
water solution;
• Part 15: Acceptance tests;
• Part 16: Requirements for grate and fluidized-bed firing systems for solid fuels for the boiler;
• CR 12952 Part 17: Guideline for the involvement of an inspection body independent of the
manufacturer.
NOTE 1 A Part 18 on operating instructions is currently in preparation.
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Although these parts may be obtained separately, it should be recognized that the parts are inter-
dependent. As such, the design and manufacture of water-tube boilers requires the application of more
than one part in order for the requirements of the document to be satisfactorily fulfilled.
NOTE 2 Part 4 and Part 15 are not applicable during the design, construction and installation stages.
NOTE 3 A “Boiler Helpdesk” has been established in CEN/TC 269 which may be contacted for any questions
regarding the application of EN 12952 series and EN 12953 series, see the following website: http://www.boiler-
helpdesk.din.de
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 2014/68/EU, see informative Annex ZA, which is an integral part of
this document.
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1 Scope
This document specifies requirements for the inspection during construction, documentation and
marking of water-tube boilers as defined in EN 12952-1:2015.
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 12952-1:2015, Water-tube boilers and auxiliary installations - Part 1: General
1
prEN 12952-2:2020, Water-tube boilers and auxiliary installations — Part 2: Materials for pressure
parts of boilers and accessories
EN 12952-3:2011, Water-tube boilers and auxiliary installations - Part 3: Design and calculation for
pressure parts of the boiler
1
prEN 12952-5:2020 , Water-tube boilers and auxiliary installations — Part 5: Workmanship and
construction of pressure parts of the boiler
EN ISO 148-1:2016, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-
1:2016)
EN ISO 3452-1:2013, Non-destructive testing - Penetrant testing - Part 1: General principles (ISO 3452-
1:2013, Corrected version 2014-05-01)
EN ISO 5817:2014, Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
excluded) - Quality levels for imperfections (ISO 5817:2014)
EN ISO 6520-1:2007, Welding and allied processes - Classification of geometric imperfections in metallic
materials - Part 1: Fusion welding (ISO 6520-1:2007)
EN ISO 9606-1:2017, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1:2012
including Cor 1:2012 and Cor 2:2013)
EN ISO 9712:2012, Non-destructive testing - Qualification and certification of NDT personnel (ISO
9712:2012)
EN ISO 11666:2018, Non-destructive testing of welds - Ultrasonic testing - Acceptance levels (ISO
11666:2018)
EN ISO 13588:2019, Non-destructive testing of welds - Ultrasonic testing - Use of automated phased array
technology (ISO 13588:2019)
EN ISO 14732:2013, Welding personnel - Qualification testing of welding operators and weld setters for
mechanized and automatic welding of metallic materials (ISO 14732:2013)
EN ISO 15613:2004, Specification and qualification of welding procedures for metallic materials -
Qualification based on pre-production welding test (ISO 15613:2004)
1
Under preparation
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EN ISO 15614-1:2017, 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 15614-1:2017, Corrected version 2017-10-01)
EN ISO 17636-1:2013, Non-destructive testing of welds - Radiographic testing - Part 1: X- and gamma-ray
techniques with film (ISO 17636-1:2013)
EN ISO 17636-2:2013, Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray
techniques with digital detectors (ISO 17636-2:2013)
EN ISO 17637:2016, Non-destructive testing of welds - Visual testing of fusion-welded joints (ISO
17637:2016)
EN ISO 17638:2016, Non-destructive testing of welds - Magnetic particle testing (ISO 17638:2016)
EN ISO 17639:2013, Destructive tests on welds in metallic materials - Macroscopic and microscopic
examination of welds (ISO 17639:2003)
EN ISO 17640:2018, Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and
assessment (ISO 17640:2018)
EN ISO 23277:2015, Non-destructive testing of welds - Penetrant testing - Acceptance levels (ISO
23277:2015)
EN ISO 23278:2015, Non-destructive testing of welds - Magnetic particle testing - Acceptance levels (ISO
23278:2015)
3 Terms and definitions
For the purposes of this document the terms and definitions given in EN 12952-1:2015 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
inspection
conformity evaluation by observation and judgement accompanied as appropriate by measurement,
testing or gauging
[SOURCE: EN ISO 9000:2015]
4 General organization
4.1 General
The manufacturer shall be responsible for ensuring the boiler conforms to the requirements of this
document. Conformance shall be confirmed by completing a series of inspection activities as detailed in
Table 1.
Except where explicitly stated otherwise in this document, inspection activities applicable to a
manufacturer’s works shall also be applicable to operations carried out on a construction site.
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4.2 Conformity assessment
Guidance in the use of the conformity assessment procedures is given in EN 12952-1:2015, Annex A.
4.3 Competency of the manufacturer
If an assessment of the competency of the manufacturer is required, guidance is given in
prEN 12952-5:2020, Annex F.
4.4 Calibration of equipment
The manufacturer shall establish procedures to ensure that tools, gauges, instruments and other
measuring and testing devices used in the manufacture and inspection activities affecting boiler product
quality, are properly controlled, calibrated and adjusted at specific intervals, to maintain accuracy
within defined limits.
NOTE A system for calibration, e.g. in compliance with the EN ISO 9000 series, is be deemed to meet these
requirements.
4.5 Inspection activities
The manufacturer shall confirm that the boiler components, as a minimum, conform to the
requirements of this document by performing and authenticating the activities listed in Table 1.
NOTE Depending upon the conformity assessment module adopted, some of the inspection activities listed
should also be assessed by a responsible authority. For the guidance of the manufacturer, the specific involvement
of such a responsible authority is indicated in CR 12952-17.
Table 1 — List of inspection activities to be undertaken by the manufacturer
Reference Area of activity Inspection operation
1 Design and general documentation
1.1 Design data/ Ensure that the design data/calculations conform to:
calculations
— technical specifications, if applicable;
— the requirements of this document.
1.2 Manufacturing Ensure that drawing information conforms to:
drawings
— design data and calculations;
— technical specifications, if applicable;
— the requirements of this Document.
1.3 Purchase Ensure that material and component specifications conform to:
specifications
— technical specifications, if applicable;
— manufacturing drawings;
— the requirements of this document.
1.4 Specifications for sub- Ensure that the specification for sub-contracted parts conform
contracted parts to:
— technical specifications, if applicable;
— manufacturing drawings;
— the requirements of this document.
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Reference Area of activity Inspection operation
2 Material
2.1 Material certificates Verify that certificate information and results conform to the
design specification.
2.2 Welding consumables Verify that the consumables to be used are in accordance with
the design specification.
2.3 Material identification Identify the material with the material certificates and check the
markings.
2.4 Transfer of Ensure that the transfer of identification marks is in accordance
identification marks with the approved procedure.
2.5 Acceptance of sub- Verify that sub-contracted parts conform to the manufacturer’s
contracted parts specification.
3 Manufacturing and welding
3.1 Welding procedure Verify that appropriate welding specifications are available and
specifications that their contents are compatible with the welding procedure
qualifications.
3.2 Welding procedure Verify that the welding procedures are appropriate for the
qualifications materials and the field of welding application, and that they have
been approved by a responsible authority.
3.3 Welder qualification/ Verify that the welder/operator qualifications have been
Operator qualification approved by a responsible authority and that they are available
and valid.
3.4 Forming procedures Verify that forming procedures are available, where applicable,
and their contents are appropriate to the product to be formed.
3.5 Joint preparations Examine material cut edges where thermal cutting has been
used and confirm machined preparations are to the correct
profile.
3.6 Formed parts Examine formed parts in accordance with the requirements of
prEN 12952-5:2020, Clause 7.
3.7 Weld assembly Examine the weld assembly, including dimensional check.
3.8 Weld root Examine second side of weld assembly, if applicable, after the
first side of weld has been completed and the root cleaned.
3.9 Production test plates, Identify and mark production test plates.
if any
Verify that any PWHT on production test plates independent of
the component complies with the
...
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