Котли водотрубні та допоміжне устатковання. Частина 5. Якість виготовлення та конструкція складників котлів, що перебувають під тиском

EN 12952-5:2011
Water-tube boilers and auxiliary installations - Part 5: Workmanship andconstruction of pressure parts of the boiler

EUROPEAN STANDARD

NORME EUROPEENNE

EUROPAISCHE NORM

Supersedes EN 12952-5:2001
English Version
Water-tube boilers and auxiliary installations - Part 5:Workmanship and construction of pressure parts of the boiler
Chaudieres a tubes d'eau et installations auxiliaires - Partie Wasserrohrkessel und Anlagenkomponenten - Teil 5:
5: Fabrication et construction des parties sous pression de Verarbeitung und BauausfOhrung fur drucktragende
la chaudiere Kesselteile
This European Standard was approved by CEN on 10 September 2011.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION

Management Centre: Avenue Marnix 17, B-1000 Brussels

Contents Page
Foreword 4
1 Scope 6
2 Normative references 6
3 Terms and definitions 7
4 Symbols and abbreviations 8
5 General 8
6 Pressure part 8
6.1 Drums, headers and similar pressure parts 8
6.2 Material identification 9
6.3 Material marking 9
6.4 Marking during manufacture 9
7 Cutting, forming and fabrication tolerances 10
7.1 Cutting material 10
7.2 Forming of drums, headers and ends 11
7.3 Forming of tube bends 11
7.4 Drum and header fabrication tolerances 19
8 Welding 21
8.1 Design and other requirements specific to welding 21
8.2 Welding consumables 24
8.3 Welding approvals 24
8.4 General production requirements for welding 25
8.5 Repairs to welds 26
8.6 Pre-heating 27
8.7 Post-weld heat treatment 27
8.8 Welding subsequent to final post-weld heat treatment 27
8.9 Welded joints, connections and production test plates 28
8.10 Attachment of non-pressure parts to drums and headers by welding 31
8.11 Welding of tubes 32
8.12 Flash butt welding of tubes 34
8.13 Welded tube water walls 34
8.14 Arc stud welding 34
9 Mechanical connections 35
9.1 General 35
9.2 Access openings 35
9.3 Branches and nozzles mechanically connected to the main pressure parts 36
9.4 Tube connections 37
10 Thermal treatment 39
10.1 General 39
10.2 Heating cycles and heat treatment(s) associated with plate forming operations 39
10.3 Pre-heating for welding and thermal cutting 41
10.4 Post weld heat treatment 42
10.5 Heat treatment of production test plates 51
Annex A (normative) Tube bending procedure tests 52
Annex В? (informative) Welded pressure connections and non-pressure containing attachments 61
Annex C (normative) Manufacture of welded tubewalls 62
Annex D (normative) Coiled boilers and coiled superheaters 69
Annex E (normative) Special requirements for composite tubes 70
Annex F (informative) Guidelines for the determination of the competency of boiler manufacturers 72
Annex G (informative) Significant technical changes between this European Standard and the previous edition 85
Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC 87
Bibliography 88Foreword
This document (EN 12952-5:2011) has been prepared by Technical Committee CEN/TC269 “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 May 2012, and conflicting national standards shall be withdrawn at the latest by May 2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12952-5:2001.
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 97/23/EC, see informative Annex ZA, which is an integral part of this document.
Annex G provides details of significant technical changes between this European Standard and the previous edition.
The European Standard series EN 12952 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 of the boiler;
—? 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.
Although these parts may be obtained separately, it should be recognized that the parts are inter-dependent. As such, the design and manufacture of boilers requires the application of more than one part in order for the requirements of the European Standard 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 European Standards series EN 12952 and EN 12953, see the following website: http://www.boiler-helpdesk.din.de .
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. 1 Scope
This European Standard specifies requirements for the workmanship and construction of water-tube boilers as defined in EN 12952-1:2001.
2 Normative references
The following referenced documents are indispensable for the application 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.
EN287-1:2011, Qualification test of welders — Fusion welding — Part 1: Steels
EN 473, Non-destructive testing — Qualification and certification of NDT personnel — General principles
EN 571 -1:1997, Non destructive testing — Penetrant testing — Part 1: General principles
EN 1092-1:2007, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges
EN 1418:1997, Welding personnel — Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials
EN 1759-1:2004, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, Class designated— Part 1: Steel flanges, NPS 1/2 to 24
EN 10025-2, Hot rolled products of structural steels — Part 2: Technical delivery conditions for non-alloy structural steels
EN 10028-2, Flat products made of steels for pressure purposes — Part 2: Non-alloy and alloy steels with specified elevated temperature properties
EN 10204:2004, Metallic products— Types of inspection documents
EN 10216-2, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10253-2:2007, Butt-welding pipe fittings — Part 2: Non alloy and ferritic alloy steels with specific inspection requirements
EN 10253-4:2008, Butt-welding pipe fittings — Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements
EN 12952-1:2001, Water-tube boilers and auxiliary installations — Part 1: General
EN 12952-2:2011, 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
EN 12952-6:2011, Water-tube boilers and auxiliary i