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CEN

EN 12953-3:2002

(Main)

Shell boilers - Part 3: Design and calculation for pressure parts

Shell boilers - Part 3: Design and calculation for pressure parts

This standard applies to shell boilers as defined in prEN 12953-1. This Part of the standard specifies rules for the design and calculation of shell boilers.

Großwasserraumkessel - Teil 3: Konstruktion und Berechnung für drucktragende Teile

Diese Norm gilt für die in prEN 12953-1 definierten Großwasserraumkessel. Dieser Teil der Norm schreibt Regeln für die Konstruktion und Berechnung von Großwasserraumkessel vor.

Chaudières à tubes de fumée - Partie 3: Conception et calcul des parties sous pression

La présente partie de l'EN 12953 s'applique aux chaudières à tubes de fumée telles que définies dans le prEN 12953-1.
La présente partie de la norme européenne spécifie les règles de conception et de calcul des chaudières à tubes de fumée.

Mnogovodni kotli - 3. del: Konstruiranje in izračun tlačno obremenjenih delov

General Information

Status
Withdrawn
Publication Date
21-May-2002
Withdrawal Date
10-May-2016
ICS
27.060.30 - Boilers and heat exchangers
27.100 - Power stations in general
Technical Committee
CEN/TC 269 - Shell and water tube boilers
Drafting Committee
CEN/TC 269/WG 1 - Water-tube boilers
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
11-May-2016
Directive
97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
Mandate
M/071 - Mandate to CEN for standardization in the field of Pressure equipment
Ref Project
SIST EN 12953-3:2002 - Shell boilers - Part 3: Design and calculation for pressure parts

Relations

Replaced By
EN 12953-3:2016 - Shell boilers - Part 3: Design and calculation for pressure parts
Effective Date
22-Dec-2008

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Großwasserraumkessel - Teil 3: Konstruktion und Berechnung für drucktragende TeileChaudieres a tubes de fumée - Partie 3: Conception et calcul des parties sous pressionShell boilers - Part 3: Design and calculation for pressure parts27.060.30Grelniki vode in prenosniki toploteBoilers and heat exchangersICS:Ta slovenski standard je istoveten z:EN 12953-3:2002SIST EN 12953-3:2002en01-november-2002SIST EN 12953-3:2002SLOVENSKI
STANDARD



SIST EN 12953-3:2002



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12953-3May 2002ICS 27.060.30; 27.100English versionShell boilers - Part 3: Design and calculation for pressure partsChaudières à tubes de fumée - Partie 3: Conception etcalcul des parties sous pressionGroßwasserraumkessel - Teil 3: Konstruktion undBerechnung für drucktragende TeileThis European Standard was approved by CEN on 15 May 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12953-3:2002 ESIST EN 12953-3:2002



EN 12953-3:2002 (E)2ContentsPageForeword.41Scope.52Normative references.53Terms and definitions.54Symbols and abbreviations.55General.55.1Boilers.55.2Hot-water generators.55.3Design of principal welds.65.4Thermal design of furnaces tubes.65.5Dimensions of pressure parts.75.6Establishment of pressures.75.7Allowances.86Calculation temperature and nominal design stress.96.1Calculation temperature.96.2Nominal design stress.107Cylindrical shells under internal pressure.107.1Shell thickness.107.2Basic c
...

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This European Standard specifies requirements for the workmanship and construction of shell boilers as defined in EN 12953-1.
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1.1   General
This European Standard applies to shell boilers with volumes in excess of 2 litres for the generation of steam and/or hot water at a maximum allowable pressure greater than 0,5 bar and with a temperature in excess of
110 °C.
The purpose of this European Standard is to ensure that the hazards associated with the operation of shell boilers are reduced to a minimum and that adequate protection is provided to contain the hazards that still prevail when the shell boiler is put into service. This protection will be achieved by the proper application of the design, manufacturing, testing and inspection methods and techniques incorporated in the various parts of this European Standard. Where appropriate, adequate warning of residual hazards and the potential for misuse are given in the training and operating instructions and local to the equipment concerned (see EN 12953-7 and EN 12953-8).
It is the manufacturer's responsibility, in addition to complying with the requirements of this standard, to take into consideration special measures which could be necessary in order to achieve by manufacturing the required level of safety in accordance with the EU Directive 97/23/EC (PED).
NOTE 1   Further requirements relating to operating instructions in prEN 12953-13 and to hazard analysis in
CEN/TS 764-6 should be taken into consideration.
This European Standard specifies requirements for both directly fired and electrically heated boilers including Low Pressure Boilers (LPB, see 3.6) as well as for heat recovery boilers with a gas-side pressure not exceeding 0,5 bar of cylindrical design, constructed from carbon or carbon manganese steels by fusion welding and a design pressure not exceeding 40 bar. The boilers covered by this European Standard are intended for land use for providing steam or hot water (typical examples are shown in Figures 1 to 6).
For Low Pressure Boilers (LPB) less stringent requirements concerning design and calculation are acceptable. Details are defined in the respective clauses.
NOTE 2   For boilers operating at a pressure on the gas-side greater than 0,5 bar the rules of this standard equally apply. However, it is generally considered that additional design analysis, inspection and testing may be necessary.
Where a particular boiler is a combination of shell and water-tube design then the water-tube standard series EN 12952 is used in addition to this European Standard. One such example of this combination is shown in Figure 3.
This European Standard applies to the generator, from the feed-water or water inlet connection to the steam or water outlet connection and to all other connections, including the valves and steam and water fittings. If welded ends are used, the requirements specified herein begin or end at the weld where flanges, if used, would have been fitted.
1.2   Exclusions
This European standard does not apply to the following types of boilers and equipments:
a)   water-tube boilers;
b)   non stationary boilers, e.g. locomotive boilers;
c)   thermal oil boilers;
d)   boilers where the main pressure housing is made of cast material.
e)   pumps, gaskets, etc.
f)   brickwork setting and insulation, etc.
NOTE   Stainless steel boilers are covered by EN 14222.

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EN 12953-2:2012(Main)
Shell boilers - Part 2: Materials for pressure parts of boilers and accessories
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This European Standard specifies the following materials for the pressure bearing parts of shell boilers and equipment of shell boilers (e.g. valves), subjected to internal and external pressure including integral attachments (non pressure bearing parts):
   flat products (plate) and parts formed from flat products (e.g. shell, furnace, dished ends);
   tubes and parts formed from tubes (e.g. bending, elbows, reducers, fittings);
   forgings and cast products ;
   bolting materials;
   welding consumables.

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EN 12953-6:2011(Main)
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SIST EN 12953-6:2011

This part of this European Standard specifies the minimum requirements for safety related equipment for shell boilers as defined in EN 12953-1, to ensure the boiler operates within the allowable limits (pressure, temperature, etc.) and if the limits are exceeded the energy supply shall be interrupted and locked out without manual (human) intervention at the boiler.
NOTE 1   The maximum time of operation without manual (human) intervention should be defined for each boiler system.
NOTE 2   Annex C (informative) gives recommendations of operation and testing of the boiler system with a maximum time of operation without manual (human) intervention of 72 hours.

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This part of the European Standard applies to all shell boilers as defined in prEN 12953-1 which are heated by combustion of one or more fuels or by hot gases for the generation of steam and/or hot water. This European Standard applies to those components between the feedwater inlet and the steam outlet of the steam generator. The quality of the steam produced is outside the scope of this standard.

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This Part of this European Standard specifies a concise procedure for conducting thermal performance tests, using the indirect (losses) procedure for boilers for steam or hot water. Test results are based on either the gross or net calorific value of the fuel.
This concise procedure provides a convenient means for assessing boilers which thermodynamically simple, i.e. having a single major source of heat input and a simple circuit for water, steam or high temperature heat transfer fluid.
NOTE 1   The use of the direct method is not advocated, because the estimated measuring error is three to four times greater than with the indirect method.
NOTE 2   An acceptance test may be required:
a) after the commissioning of new plant or after the recommissioning of modified plant in order to verify compliance with a specification or contractual obligation;
b) whenever the user wishes to determine the current performance of the plant either on a route basis or due to change of load or other operating conditions or when a change of fuel or a modification to the plant is being considered;
c) whenever the user wishes to check combustion conditions.
Regular tests in accordance with this European Standard will enable boiler plant to be monitored in normal operation for opti-mum efficiency in the interests of fuel conservation.
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