Water-tubeboilersand auxiliaryinstallations
Part 2:Materials forpressure parts ofboilersandaccessories
..makingexcellence ahabit
National foreword
BSI 2011
ISBN 978 0 580 63552 6
ICS 23.020.01; 27.040; 27.060.30
Amendments issued since publication
Date Text affected
This British Standard is the UK implementation of EN 12952-2:2011.It supersedes BS EN 12952-2:2001 which is withdrawn.
The UK participation in its preparation was entrusted to Technical Committee PVE/2 Water Tube And Shell Boilers.
A list of organizations represented on this mittee can beobtained on request to its secretary.
This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correctapplication.
Compliance with a British Standard cannot confer immunity from legal obligations.
This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2011.
English Version
Water-tubeboilersand auxiliary installations-Part 2:Materials forpressure parts of boilers and accessories
Chaudieres a tubes dfeau et installations auxiiaires - Partie2: Materiaux des parties sous pression des chaudieres et
accessoires
Wasserrohrkessel und Anlagenkomponenten - Teil 2:Werkstoffe fur drucktragende Kesselteile und Zubehor
This European Standard was approved by CEN on 25 June 2011.
CEN members are bound to ply 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 conceming such nationalstandards 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 responsibilty of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the samestatus as the official versions.
CEN members are the national standards bodies of Austria Belgium Bulgaria Croatia Cyprus Czech Republic Denmark Estonia Finland Frane Gemany Grce Hungary Icelnd reland taly Latvia Liuania Lxmurg Malta therands way Pol Portugal Romania Slovakia Slovenia Spain Sweden Switzerland and United Kingdom.
Management Centre: Avenue Marnix 17 B-1000 Brussels
Contents
Foreword....1 Scope. ..52 Normative references.3 3.1 Selection of materials with regard to service conditions. General requirements. .9 .93.2 3.3 Material specification. Selection ofmaterialswithregard tofabrication. ..9 .93.3.2 3.3.1 European Standards. General....3.3.3 European approvals for materials ..93.3.4 3.4 Particular material appraisals. Consideration of special materials properties.3.5 3.6 Contents of material specification.... Compliance and inspection documentation of materials.. ....10 ...114 Material for pressure parts ...4.1 4.1.1 Flat products forgings castings tubes fittings flanges and valve bodies ..114.1.2 Cast iron... ..14.1.3 4.1.4 Welding consumables. Studs bolts and nuts ...11 ..114.1.6 4.1.5 Requirements for plates used for heads. Requirements for non-destructive examination... ...1 ..124.1.7 4.1.8 Marking Inspection documents... ...13 ...13.4.2 Material covered by European approvals of materials for pressure equipment 4.2.1 technical requirements General.. ..13 .134.2.2 4.2.3 Manufacture.. Heat treatment condition. ..4.2.4 4.2.5 Chemical position Mechanical and technological properties. .14 ..144.3 Materials with particular material appraisals. ...175 Materials for non-pressure parts ..89 Inspection documentation. ..1Annex A (normative) Materials covered by European material Standards. Annex B (normative) Establishment of creep rupture strength values for new materials. ..20 ...1Annex C (normative) Special requirements for posite tubes.. ...2Annex D (informative) Significant technical changes between this European Standard and theprevious edition.. ....Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of Directive 97/23/EC.... ..37Bibliography
Foreword
water-tube boilers* the secretariat of which is held by DIN.
e ue o ugnd q eue s euou e jo sns e i eaus peps ueadon stext or by endorsement at the latest by February 2012 and conflicting national standards shall be withdrawnat the latest by February 2012.
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12952-2:2001.
a pue uosswo ueadong Aq n o uenie epu e jepun peedeud ueeq seu junop s 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 thisewnoop
Annex D provides details of significant technical changes between this European Standard and the previousedition.
The European Standard series EN 12952 concerning water-tube boilers and auxiliary installations consists of
-Part 1: General;- Part 2: Materials for pressure parts of boifers and accessories;- Part 4: In-service boile life expectancy calculations- Part 5: Workmanship and construction of pressure parts of the boiler;--Part 6: Inspectio 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: Requirementsforfiring systems for pulverized sold fuels for the boir-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;water solution;
-Part 3: Design and calculation for pressure parts;
-Part 14: Requirements for flue gas DENOX-systems using liquefied pressurized armmonia and ammonia
