EN 3050:1998

Aerospace series - O-rings, in fluorocarbon rubber (FKM), low compression set - Technical specification

This standard specifies the characteristics, qualification and acceptance requirements for o-rings in low compression set fluorocarbon rubber (FKM) to EN 2798. It is applicable whenever referenced.

Luft- und Raumfahrt - O-Ringe, aus Fluorcarbon-Elastomer (FKM), mit niedrigem Druckverformungsrest - Technische Lieferbedingungen

Diese Norm legt die Eigenschaften sowie die Qualifikations- und Annahmebedingungen für O-Ringe aus Fluorcarbon-Elastomer (FKM), mit niedrigem Druckverformungsrest, nach EN 2798 fest. Sie ist anzuwenden, wenn auf sie Bezug genommen wird.

Série aérospatiale - Joints toriques, en élastomère fluorocarbone (FKM), à faible déformation rémanente après compression - Spécification technique

La présente norme spécifie les caractéristiques, les exigences de qualification et de réception des joints toriques en élastomère fluorocarbone (FKM), à faible déformation rémanente après compression, suivant EN 2798. Elle est applicable chaque fois qu'elle est citée en référence.

Aerospace series - O-rings, in fluorocarbon rubber (FKM), low compression set - Technical specification

General Information

• Status: Published
• Publication Date: 19-May-1998
• Withdrawal Date: 29-Nov-1998
• ICS: 49.080 - Aerospace fluid systems and components
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3 - Mechanical
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 20-May-1998
• Completion Date: 20-May-1998
• Ref Project: SIST EN 3050:2001 - Aerospace series - O-rings, in fluorocarbon rubber (FKM), low compression set - Technical specification

Relations

• Revised: EN 3050:2025 - Aerospace series - O-rings, in fluorocarbon rubber (FKM), low compression set - Technical specification
• Effective Date: 08-Apr-2024

Overview

EN 3050:1998 (Aerospace series) is a CEN technical specification that defines the requirements for O-rings made from low compression set fluorocarbon rubber (FKM). The standard specifies the characteristics, qualification and acceptance requirements for these FKM O-rings in accordance with EN 2798 and is applicable wherever referenced in aerospace procurement, design and maintenance documentation.

Key topics and requirements

• Material specification: Focus on O-rings manufactured from fluorocarbon rubber (FKM) formulated to deliver low compression set, improving long-term sealing performance under sustained load.
• Qualification requirements: Procedures and evidence suppliers must provide to demonstrate conformity - including material verification, manufacturing controls and test records (as referenced to EN 2798).
• Acceptance criteria: Criteria for batch acceptance, including inspection and testing outcomes required before O-rings are released for aerospace use.
• Traceability and documentation: Requirements for marking, batch identification and delivery documentation to ensure traceability throughout the supply chain.
• Performance considerations: Emphasis on properties relevant to aerospace seals such as resistance to fuels, hydraulic fluids, temperature extremes and compression set retention (as implied by low compression set FKM).
• Applicability clause: Clarifies that EN 3050 is applicable whenever it is referenced in procurement or design specifications.

Applications

EN 3050:1998 is intended for use in the aerospace sector where reliable elastomeric sealing is critical. Typical applications include:

• Sealing components in aircraft hydraulic and fuel systems
• Static and dynamic O-ring seals in pumps, valves, actuators and fittings
• Replacement and spares procurement for aircraft maintenance and overhaul
• Specification of seals in aerospace component design and qualification

Who uses it:

• Aerospace OEMs and sub-contractors specifying O-rings
• Seal manufacturers and material suppliers producing FKM O-rings
• Quality assurance, procurement and regulatory teams conducting acceptance and conformity checks
• Maintenance, repair and overhaul (MRO) organizations sourcing approved seals

Related standards

• EN 2798 - referenced for FKM material requirements and related test procedures (see EN 3050 for application specifics).
• Other aerospace sealing and elastomer standards may be used alongside EN 3050 for system-level specification and compatibility assessment.

EN 3050:1998 provides a focused, traceable framework for specifying low compression set FKM O-rings in aerospace applications, supporting durability, safety and interchangeability of critical seal components.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2001
Aerospace series - O-rings, in fluorocarbon rubber (FKM), low compression set -
Technical specification
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 élastomere fluorocarbone (FKM), a faible
déformation rémanente apres compression - Spécification technique
Ta slovenski standard je istoveten z: EN 3050:1998
ICS:
49.080 /HWDOVNLLQYHVROMVNL Aerospace fluid systems and
KLGUDYOLþQLVLVWHPLLQGHOL components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali del
...