SIST EN 12953-6:2025
(Main)Shell Boilers - Part 6: Requirements for equipment for the boiler
Shell Boilers - Part 6: Requirements for equipment for the boiler
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.
Großwasserraumkessel - Teil 6: Anforderungen an die Ausrüstung für den Kessel
Chaudières à tube de fumée - Partie 6: Exigences pour l'équipement de la chaudière
Le présent document spécifie les exigences minimales pour l'équipement relatif à la sécurité des chaudières à tubes de fumée (générateurs et/ou ensembles) spécifiées dans l'EN 12953 1:2012, afin de garantir que la chaudière fonctionne dans les limites admissibles (pression, température, etc.) et, dans le cas où les limites seraient dépassées, que l'alimentation en énergie est interrompue et verrouillée automatiquement, indépendamment du degré d'intervention.
NOTE 1 Dans le cadre du présent document, le terme « chaudière » s'applique aux générateurs et/ou ensembles.
NOTE 2 La durée maximale de fonctionnement sans intervention manuelle (humaine) peut être spécifiée pour chaque système de chaudière.
NOTE 3 L'Annexe C donne des recommandations de fonctionnement et d'essai du système de chaudière avec une durée maximale de fonctionnement sans intervention manuelle (humaine) de 24 h et 72 h.
Mnogovodni kotli - 6. del: Zahteve za opremo kotla
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Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2025
Nadomešča:
SIST EN 12953-6:2011
Mnogovodni kotli - 6. del: Zahteve za opremo kotla
Shell Boilers - Part 6: Requirements for equipment for the boiler
Großwasserraumkessel - Teil 6: Anforderungen an die Ausrüstung für den Kessel
Chaudières à tube de fumée - Partie 6: Exigences pour l'équipement de la chaudière
Ta slovenski standard je istoveten z: EN 12953-6:2024
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 12953-6
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2024
EUROPÄISCHE NORM
ICS 27.060.30 Supersedes EN 12953-6:2011
English Version
Shell Boilers - Part 6: Requirements for equipment for the
boiler
Chaudières à tubes de fumée - Partie 6: Exigences pour Großwasserraumkessel - Teil 6: Anforderungen an die
l'équipement de la chaudière Ausrüstung für den Kessel
This European Standard was approved by CEN on 20 October 2024.
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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12953-6:2024 E
worldwide for CEN national Members.
Contents
European foreword . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements for steam boilers and hot water boilers . 12
4.1 Safeguards (safety valves) against excessive pressure . 12
4.2 Materials for valves, fittings, flanges and bolting . 12
4.3 Protective systems . 12
4.4 Energy supply . 13
4.4.1 General . 13
4.4.2 Start up . 13
4.4.3 Normal shutdown . 14
4.5 Flue-gas heated economizers. 14
4.6 Drain and blowdown devices . 14
4.7 Water quality . 15
4.8 Water quality protection . 15
4.8.1 Conductivity in steam boiler water . 15
4.8.2 Condensate in steam boiler plants . 15
4.8.3 Water circulating system in hot water boiler plants . 16
4.8.4 Make-up water or feed water . 16
4.9 Furnace temperature monitoring system . 16
5 Special requirements for steam boilers . 18
5.1 Water level indication . 18
5.2 Steam pressure and temperature indication . 21
5.3 Valves for connections . 21
5.3.1 Steam outlets . 21
5.3.2 Feed pipe connections . 21
5.4 Feed water supply . 22
5.5 Feed water control . 22
5.6 Limiting and monitoring devices. 22
5.6.1 Low and high water level protection . 22
5.6.2 Pressure limitation . 23
5.6.3 Temperature limitation . 23
5.6.4 Flow monitoring device . 23
5.7 Electrically heated steam boilers . 23
6 Special requirements for hot water boilers . 24
6.1 Hot water generating systems . 24
6.2 Expansion and feed lines for open vented systems . 25
6.3 Water supply . 27
6.4 Water level indication . 27
6.5 Limiting and monitoring devices. 27
6.5.1 Low water protection . 27
6.5.2 Pressure and temperature limitation . 27
6.5.3 Flow monitoring device . 28
6.5.4 High water level protection . 28
6.6 Vent valves . 28
6.7 Pressure and temperature indication . 28
6.8 Electrically heated hot water boilers . 29
6.9 Parallel mode of operation of hot water boilers . 29
7 Operating instructions and operational aspects including maintenance and testing . 29
8 Alarms and monitoring from the boiler plant . 30
Annex A (informative) Typical examples of steam and hot water boiler systems . 31
A.1 General . 31
A.2 Key to figures. 31
A.3 Plant with open vented system . 33
A.4 Plant with closed system . 34
A.4.1 Hot water system with external pressure generating and expansion system . 34
A.4.2 Hot water system with internal pressure generating and expansion system - Steam
cushion in the boiler . 35
A.4.3 Steam boiler . 36
A.5 Superheater and economizer . 37
A.5.1 Superheater . 37
A.5.2 Economizer . 38
Annex B (informative) Dimensioning of expansion space . 39
B.1 General . 39
B.2 Required data . 39
B.3 Formulas for dimensioning . 40
Annex C (informative) Aspects of boiler operation . 42
C.1 General . 42
C.2 Maintenance . 42
C.3 Boiler operation and testing . 42
Annex D (informative) Drain and blowdown devices. 47
D.1 General . 47
D.2 Design of the drain and blowdown devices . 47
Annex E (informative) Alarms and monitoring from the boiler plant. 49
E.1 General . 49
E.2 Conditions for alarms and monitoring . 49
Annex F (normative) Requirements for monitoring devices . 52
F.1 General requirements for monitoring devices . 52
F.1.1 General .
...
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