EN 3050:2025

SLOVENSKI STANDARD
01-februar-2026
Nadomešča:
SIST EN 3050:2001
Aeronavtika - Tesnilni obročki O, izdelani iz fluoroogljikove gume (FKM) z nizko
stopnjo kompresije - Tehnična specifikacija
Aerospace series - O-rings, in fluorocarbon rubber (FKM), low compression set -
Technical specification
Luft- und Raumfahrt - O-Ringe aus Fluorcarbon-Elastomer (FKM) mit niedrigem
Druckverformungsrest - Technische Lieferbedingungen
Série aérospatiale - Joints toriques, en élastomère fluorocarbone (FKM), à faible
déformation rémanente après compression - Spécification technique
Ta slovenski standard je istoveten z: EN 3050:2025
ICS:
49.080 Letalski in vesoljski Aerospace fluid systems and
hidravlični sistemi in deli components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 3050
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2025
EUROPÄISCHE NORM
ICS 49.080 Supersedes EN 3050:1998
English Version
Aerospace series - O-rings, in fluorocarbon rubber (FKM),
low compression set - Technical specification
Série aérospatiale - Joints toriques, en élastomère Luft- und Raumfahrt - O-Ringe aus Fluorcarbon-
fluorocarbone (FKM), à faible déformation rémanente Elastomer (FKM) mit niedrigem Druckverformungsrest
après compression - Spécification technique - Technische Lieferbedingungen
This European Standard was approved by CEN on 29 September 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 3050:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Quality assurance . 5
4.1 Qualification . 5
4.1.1 General. 5
4.1.2 Hardness Test . 5
4.2 Acceptance. 5
4.2.1 Conditions . 5
4.2.2 Responsibility . 6
4.2.3 Inspection and test report . 6
5 Requirements . 6
Annex A (normative) Packaging . 9
A.1 General. 9
A.2 Material of the individual package . 9
A.3 Dimensions of the individual packages . 9
A.4 Identification . 10
A.5 Collective packaging . 10
Bibliography . 11

European foreword
This document (EN 3050:2025) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
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 June 2026, and conflicting national standards shall be
withdrawn at the latest by June 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 3050:1998.
This document includes the following significant technical changes with respect to EN 3050:1998:
— normative references were updated;
— subclause 4.1.1 was updated to include further information on qualification;
— subclause 4.1.2, Hardness Test, was added;
— Bibliography was added.
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 organizations 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.
1 Scope
This document specifies the characteristics, qualification and acceptance requirements for O-rings in
low compression set fluorocarbon rubber (FKM) in accordance with EN 2798.
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 amendm
...