iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
CEN

EN 12953-3:2016

(Main)

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

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

This Part of this European Standard specifies requirements for the design and calculation of pressure parts of shell boilers as defined in EN 12953 1.
NOTE   For other components such as economisers, superheaters, tube walls, headers, reference should be made to EN 12952 series.

Großwasserraumkessel - Teil 3: Konstruktion und Berechnung für drucktragende Teile

Dieser Teil der Europäischen Norm legt Anforderungen an die Konstruktion und die Berechnung von druck¬tragenden Teilen für die in EN 12953 1 definierten Großwasserraumkessel fest.
Für andere Komponenten, wie z. B. Wasserrohrwände, sollte die Normenreihe EN 12952 in Bezug genommen werden.

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

La présente partie de la Norme européenne spécifie les exigences de conception et de calcul des parties sous pression des chaudières à tubes de fumée telles que définies dans l’EN 12953 1.
Pour les autres composants, tels que les parois à tubes d'eau, il convient de se référer à la série EN 12952.

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

Ta del tega evropskega standarda določa zahteve za konstruiranje in izračun tlačno obremenjenih delov mnogovodnih kotlov iz standarda EN 12953 1.
OPOMBA: Za druge sestavne dele, kot so ekonomizerji, grelci, cevne stene, kompenzacijski rezervoarji, glej skupino standardov EN 12952.

General Information

Status
Published
Publication Date
10-May-2016
Withdrawal Date
29-Nov-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 2 - Shell boilers
Current Stage
9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
Completion Date
07-Jun-2022
Directive
2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
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 12953-3:2016 - Shell boilers - Part 3: Design and calculation for pressure parts

Relations

Replaces
EN 12953-3:2002 - Shell boilers - Part 3: Design and calculation for pressure parts
Effective Date
22-Dec-2008
Corrected By
EN 12953-3:2016/AC:2024 - Shell boilers - Part 3: Design and calculation for pressure parts
Effective Date
08-May-2024

Buy Standard

EN 12953-3:2016EN 12953-3:2016
PreviousNext
Standard
EN 12953-3:2016
English language
109 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)


SLOVENSKI STANDARD
01-junij-2016
1DGRPHãþD
SIST EN 12953-3:2002
0QRJRYRGQLNRWOLGHO.RQVWUXLUDQMHLQL]UDþXQWODþQRREUHPHQMHQLKGHORY
Shell boilers - Part 3: Design and calculation for pressure parts
Großwasserraumkessel - Teil 3: Konstruktion und Berechnung für drucktragende Teile
Chaudières à tube de fumée - Partie 3: Conception et calcul des parties sous pression
Ta slovenski standard je istoveten z: EN 12953-3:2016
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 12953-3
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2016
EUROPÄISCHE NORM
ICS 27.060.30; 27.100 Supersedes EN 12953-3:2002
English Version
Shell boilers - Part 3: Design and calculation for pressure
parts
Chaudières à tubes de fumée - Partie 3: Conception et Großwasserraumkessel - Teil 3: Konstruktion und
calcul des parties sous pression Berechnung für drucktragende Teile
This European Standard was approved by CEN on 23 January 2016.

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, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12953-3:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Symbols and abbreviations . 8
5 General . 8
5.1 Boilers . 8
5.2 Hot-water boilers . 8
5.3 Main welds . 8
5.4 Weld factor . 9
5.5 Thermal design of furnaces tubes . 9
5.5.1 Design conditions . 9
5.5.2 Furnace dimensions . 11
5.5.3 Heat input . 11
5.5.4 Additional operating conditions . 12
5.6 Dimensions of pressure parts . 12
5.7 Determination of pressures . 12
5.7.1 Maximum allowable pressure . 12
5.7.2 Calculation pressure . 12
5.7.3 Safety valves set pressure . 12
5.7.4 Hydrostatic test pressure . 13
5.8 Allowances . 13
5.8.1 Allowance for material supply tolerances and forming processes . 13
5.8.2 Allowance for metal wastage . 13
5.9 Additional material requirements for plates . 13
5.10 Standardized fittings . 14
5.11 Flanges . 14
5.12 Design by analysis . 14
5.13 Economizer and superheater. 14
6 Calculation temperature and nominal design stress . 14
6.1 Calculation temperature . 14
6.2 Nominal design stress. 15
7 Cylindrical shells . 15
7.1 Shell thickness . 15
7.1.1 Requirements . 15
7.1.2 Required wall thickness including allowances . 16
7.2 Basic calculation subjected to internal pressure . 16
7.3 Boiler supports and lifting lugs . 16
8 Openings and branches in cylindrical shells . 16
8.1 General . 16
8.1.1 Introduction . 16
8.1.2 Requirements for the reinforcement of openings in shells . 16
8.1.3 Effective lengths l for calculation of efficiencies and of compensations. 18
rs
8.1.4 Condition of isolated openings . 22
8.1.5 Requirements for design of branches . 22
8.1.6 Requirements for design of reinforcing pads . 22
8.1.7 General requirements for calculation of cross-sectional and pressure-loaded areas . 23
8.2 Efficiency factor, alternative calculation method, maximum diameter of an un-reinforced
opening . 23
8.2.1 General . 23
8.2.2 Allowable efficiency and maximum diameter of an unreinforced opening . 24
8.2.3 Isolated openings . 24
8.2.4 Adjacent openings . 25
8.3 Design of openings and branches in shells (efficiency and reinforcement) . 25
8.3.1 Symbols and abbreviations . 25
8.3.2 Requirements for application . 26
8.3.3 Design of isolated openings and branch connections . 30
8.3.4 Design of adjacent openings and branch connections . 32
9 Ends . 33
9.1 Unstayed dished heads without openings . 33
9.1.1 Unstayed dished heads under internal pressure . 33
9.1.2 Limiting conditions . 33
9.1.3 Unstayed dished heads under external pressure . 35
9.2 Flat unstayed removable closures . 36
9.3 Unstayed flat plates. 37
10 Supported flat plates, stays and stiffeners . 38
10.1 Breathing space for flat plates . 38
10.2 Stayed flat surfaces . 40
10.2.1 General . 40
10.2.2 Radius of flange . 40
10.2.3 Point of support . 40
10.2.4 Thickness . 41
10.2.5 Values of constant C . 44
10.2.6 Stays for wet back reversal chambers . 54
10.2.7 Stay tubes and bars .
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

CEN
EN 12953-5:2020(Main)
Shell boilers - Part 5: Inspection during construction, documentation and marking of pressure parts of the boiler
SIST EN 12953-5:2020

This document specifies requirements for the inspection during and after construction, documentation and marking of shell boilers as defined in EN 12953-1.
NOTE   For other components, such as water tube walls, reference will be made to the EN 12952 series.

  • Standard
    32 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Standard – translation
    35 pages
    Slovenian language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 12953-4:2018(Main)
Shell boilers - Part 4: Workmanship and construction of pressure parts of the boiler
SIST EN 12953-4:2018

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.

  • Standard
    35 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 12953-2:2012(Main)
Shell boilers - Part 2: Materials for pressure parts of boilers and accessories
SIST EN 12953-2:2012

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.

  • Standard
    15 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 12953-1:2012(Main)
Shell boilers - Part 1: General
SIST EN 12953-1:2012

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.

  • Standard
    35 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 12953-6:2011(Main)
Shell Boilers - Part 6: Requirements for equipment for the boiler
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.

  • Standard
    52 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 12953-10:2003(Main)
Shell boilers - Part 10 : Requirements for feedwater and boiler water quality
SIST EN 12953-10:2004

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.

  • Standard
    13 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Standard – translation
    15 pages
    Slovenian language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 12953-11:2003(Main)
Shell boilers - Part 11: Acceptance tests
SIST EN 12953-11:2004

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.
This procedure does not cover condensing boilers. The application of boilers, where heat is extracted from waste gases is specified in annex B.

  • Standard
    33 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 12953-8:2001/AC:2002(Corrigendum)
Shell boilers - Part 8: Requirements for safeguards against excessive pressure
SIST EN 12953-8:2002/AC:2002

TC - Request to implement normative comments from BSI after Formal Vote
2013: Originator of XML version: first setup pilot of CCMC in 2012

  • Corrigendum
    2 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Corrigendum
    2 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
CR 12953-14:2002(Main)
Shell boilers - Part 14: Guideline for involvement of an inspection body independent of the manufacturer
SIST CR 12953-14:2002

This Technical report gives guidance for the involvement of an inspection body independent of the manufacturer of shell boilers as defined in EN 12953 1.

  • Technical report
    12 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 12953-7:2002(Main)
Shell boilers - Part 7 : Requirements for firing systems for liquid and gaseous fuels for the boilers
SIST EN 12953-7:2002

These requirements apply to oil and gas firing systems of steam and hot water generators. For multifuel firing systems using separate or combined burners these requirements shall apply to the oil and/or gas firing part involved. Where several fuels are burnt simultaneously, improved safety measures may be necessary, especially in respect to limitation of heat input into the firing system and proper air supply to the individual fuels.

  • Standard
    10 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Standard
    10 pages
    English language
    sale 10% off
    e-Library read for
    1 day