EN 14222:2021+A1:2025
(Main + Amendment)Stainless steel steam boilers
Stainless steel steam boilers
This document specifies requirements for electrically heated steam boilers manufactured from stainless steel specifically dedicated for generating steam for sterilizers and disinfectors.
This document covers only steam boilers that are heated by immersion heaters and which have a maximum allowable pressure (PS) of not greater than 6 bar, a maximum volume (V) of 1 000 litres and a product of PS ∙ V not greater than 3 000 bar ∙ l.
Edelstahl-Dampfkessel
Dieses Dokument legt die Anforderungen an elektrisch beheizte Dampfkessel aus nichtrostenden Stählen (Edelstahl) fest, die zur Versorgung von Sterilisations und Desinfektionsanlagen dienen.
Dieses Dokument gilt nur für mit Eintauchheizelementen beheizte Dampfkessel mit einem maximal zulässigen Druck (PS) von nicht mehr als 6 bar, einem maximalen Volumen (V) von 1 000 l und einem Produkt PS · V von nicht mehr als 3 000 bar · l.
Chaudières à vapeur en acier inoxydable
Le présent document spécifie les exigences applicables aux chaudières à vapeur chauffées électriquement, fabriquées en acier inoxydable, spécifiquement destinées à la production de vapeur pour les stérilisateurs et les dispositifs de désinfection.
Seules les chaudières à vapeur qui sont chauffées par des dispositifs de chauffage immergés et qui ont une pression maximale admissible (PS) inférieure ou égale à 6 bar, un volume maximal (V) de 1 000 l et un produit PS ∙ V inférieur ou égal à 3 000 bar ∙ l, sont couvertes par le présent document.
Parni kotli iz nerjavnega jekla (vključno z dopolnilom A1)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2025
Parni kotli iz nerjavnega jekla (vključno z dopolnilom A1)
Stainless steel steam boilers
Edelstahl-Dampfkessel
Chaudières à vapeur en acier inoxydable
Ta slovenski standard je istoveten z: EN 14222:2021+A1:2025
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 14222:2021+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2025
EUROPÄISCHE NORM
ICS 27.060.30 Supersedes EN 14222:2021
English Version
Stainless steel steam boilers
Chaudières à vapeur en acier inoxydable Edelstahl-Dampfkessel
This European Standard was approved by CEN on 13 December 2020 and includes Amendment 1 approved by CEN on 16 April
2025.
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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14222:2021+A1:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Materials . 8
5 Design . 8
6 Manufacture . 8
7 Inspection and testing . 8
8 Marking . 9
9 Requirements for equipment . 9
9.1 General . 9
9.2 Safeguards against excessive pressure . 9
9.3 Materials for valves, fittings, flanges and bolting . 9
9.4 Limiting devices and safety circuits . 9
9.5 Steam boiler heat supply . 10
9.6 Water level indication . 10
9.7 Steam pressure indication . 11
9.8 Drain and blowdown devices . 12
9.9 Valves for connections . 12
9.9.1 Steam outlets . 12
9.9.2 Feed water connections and steam supply lines . 12
9.10 Feed water supply . 13
9.11 Feed water control . 13
9.12 Limiter . 13
9.12.1 Low water protection . 13
9.12.2 Pressure limitation . 13
10 Operation of steam boilers . 13
11 Small steam boilers . 13
Annex A (informative) Operation of steam boilers . 14
Annex ZA !(informative) Relationship between this European Standard the General Safety
and Performance Requirements of Regulation (EU) 2017/745 aimed to be covered . 16
Annex ZB (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU on Pressure Equipment aimed to be
covered" . 19
Bibliography . 20
European foreword
This document (EN 14222:2021+A1:2025) has been prepared by Technical Committee CEN/TC 102
“Sterilizers and associated equipment for processing of medical devices”, 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 March 2026, and conflicting national standards shall
be withdrawn at the latest by March 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes !EN 14222:2021".
This document includes Amendment 1 approved by CEN on 16 April 2025.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
!This document has been prepared under a standardization request addressed to CEN by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
For the relationship with EU Legislation, see informative Annex ZA, and Annex ZB, which are integral
parts of this document."
Further to the updating both technically and editorially, the following changes compared to the
previous edition have been made:
— in the title “shell” has been changed to “steam” to read: “stainless steel steam boilers”;
— Scope has been refined by replacing “allowable pressure (PS) of 6 bar” by “allowable pressure (PS)
of not greater than 6 bar”;
— Introduction added;
— Normative references and Bibliography have been updated;
— alignment of terminology throughout the document;
— definition of “limiter” has been aligned with EN 12953-9 and new definition of “steam boiler” was
introduced;
— requirements on materials have been aligned with new edition of EN 13445-2;
— general requirements for equipment (see 9.1) have been revised, e.g. requirements on materials in
contact with steam added;
— requirements on limiting devices and safety circuits (see 9.4) have been fundamentally revised;
— requirements on steam boiler heat supply revised by adding cross-references to requirements of
EN 285:2015+A1:2021, or EN 13060:2014+A1:2018 (see 9.5);
— the option of the use of an safety temperature limiter instead of a water level limiter has been
addressed (see 9.6.3);
— requirements on steam pressure indication have been revised by adding reference to small steam
sterilizers (see 9.7.1);
— requirements on limiter regarding low water protection (see 9.12.1) have been fundamentally
revised;
— !removal of informative Annex B on Guidance on the intended relationship between this
European Standard and the General Safety and Performance Requirements of Regulation (EU)
2017/745 on medical devices aimed to be covered;
— update of Annex ZA on the Relationship between this European Standard the General Safety and
Performance Requirements of Regulation (EU) 2017/745 aimed to be covered;
— update of Annex ZB on the Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU on Pressure Equipment aimed to be covered".
!Any feedback and questions on this document should be directed to the users’ national standards
body. A complete listing of these bodies can be found on the CEN website."
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Introduction
EN 14222 is referred to normatively in !EN 285:2015+A1:2021", Sterilization — Steam sterilizers
— Large sterilizers and can be applied to EN 13060:2014+A1:2018, Small steam sterilizers, two
standards developed by CEN/TC 102 “Sterilizers and associated equipment for processing of medical
devices”.
During the systematic review of EN 14222:2003 in 2014, CEN/TC 102 identified and expressed that the
standard needed revising to bring it to the state of the art, and hence to enhance the requirements
contained in !EN 285:2015+A1:2021" and EN 13060:2014+A1:2018.
This document refers to EN 12953, Shell boilers and EN 13445, Unfired pressure vessels.
1 Scope
This document specifies requirements for electrically heated steam boilers manufactured from stainless
steel specifically dedicated for generating steam for sterilizers and disinfectors.
This document covers only steam boilers that are heated by immersion heaters and which have a
maximum allowable pressure (PS) of not greater than 6 bar, a maximum volume (V) of 1 000 litres and
a product of PS ∙ V not greater than 3 000 bar ∙ l.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
!EN 285:2015+A1:2021, Sterilization — Steam sterilizers — Large sterilizers"
EN 764-1:2015+A1:2016, Pressure equipment — Part 1: Vocabulary
EN 12953-1:2012, Shell boilers — Part 1: General
EN 12953-5:2020, Shell boilers — Part 5: Inspection during construction, documentation and marking of
pressure parts of the boiler
!EN 12953-6:2024, Shell boilers — Part 6: Requirements for equipment for the boiler"
1)
!EN 12953-8:2001, Shell boilers — Part 8: Requirements for safeguards against excessive
pressure"
!EN 12953-9:2024, Shell boilers — Part 9: Requirements for limiting devices of the boiler and
accessories "
EN 13060:2014+A1:2018, Small steam sterilizers
!EN 13445-2:2021+A1:2023, Unfired pressure vessels — Part 2: Materials"
!EN 13445-3:2021, Unfired pressure vessels — Part 3: Design"
!EN 13445-4:2021+A1:2023, Unfired pressure vessels — Part 4: Fabrication"
!EN 13445-5:2021+A1:2024, Unfired pressure vessels — Part 5: Inspection and testing"
EN 14597:2012, Temperature control devices and temperature limiters for heat generating system
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.