SIST EN 4809:2017
(Main)Aerospace series - Flange couplings - Gasket seal with fluorocarbon seal on aluminium plate with 3 fastening holes - Inch series
Aerospace series - Flange couplings - Gasket seal with fluorocarbon seal on aluminium plate with 3 fastening holes - Inch series
This standard specifies the characteristics of gasket seal with fluorocarbon seal on aluminium plate, 3 holes, for pipe couplings for inch series aerospace applications.
Nominal pressure: up to 21 000 kPa; depends on the associated tube material and tube wall thickness in the assembly (see EN 4814).
Temperature range: 20 °C to 200 °C.
NOTE Assembly in accordance with TR 4815.
This part should not be reused after disassembling.
Luft- und Raumfahrt - Rohrverschraubung mit Flanschen - Flachdichtung aus Fluorocarbon-Elastomer, mit Aluminiumarmierung mit 3 Befestigungslöchern - Inch-Reihe
Diese Europäische Norm legt die Eigenschaften von Flachdichtungen aus Fluorcarbon-Elastomer mit Aluminiumarmierung mit 3 Löchern für Rohrverbindungen in Anwendungen der Luft- und Raumfahrt (Inch Reihe) fest.
Nenndruck: bis zu 21 000 kPa; abhängig von dem Rohrmaterial und der Dicke der Rohrwand bei dem Aufbau (siehe EN 4814).
Temperaturbereich: −20 °C bis 200 °C.
ANMERKUNG Aufbau nach TR 4815.
Dieser Teil sollte nach der Demontage nicht wieder verwendet werden.
Série aérospatiale - Raccordement à bride - Joint plaque avec joint en fluorocarbone sur plaque en aluminium avec 3 trous de fixation - Série en inches
Aeronavtika - Prirobnične spojke - Robno tesnilo s fluorokarbonsko zalivko na aluminijski plošči s 3 pritrdilnimi luknjami - Palčne mere
Ta evropski standard določa karakteristike robnega tesnila s fluorokarbonsko zalivko na aluminijski plošči s 3 pritrdilnimi luknjami za prirobnične spojke v palčnih merah za aeronavtiko.
Nazivni tlak: do 21.000 kPa, odvisno od materiala povezane cevi, premera cevi in debeline stene cevi v sestavu (glej standard EN 4814).
Temperaturno območje: od −20 °C do 200 °C
OPOMBA Sestav v skladu s TR 4815.
Tega dela se po demontaži naj ne bi znova uporabilo.
General Information
Overview
SIST EN 4809:2017 is a European standard developed by CEN that defines the specifications for gasket seals used in aerospace flange couplings. Specifically, this standard covers gasket seals with fluorocarbon elastomer sealing material bonded to an aluminum plate featuring three fastening holes, designed for inch series pipe couplings in aerospace applications. The standard ensures these components meet stringent requirements for pressure resistance, temperature tolerance, and quality assurance.
The gasket seal specified in SIST EN 4809:2017 can withstand nominal pressures up to 21,000 kPa, depending on the associated tube material and wall thickness as referenced in EN 4814. It operates effectively within a temperature range of −20 °C to 200 °C. Importantly, the gasket should not be reused after disassembly to maintain safety and performance integrity.
Key Topics
Material Specifications
- Seal composed of fluorocarbon rubber (FPM) with low compression set as per EN 2798
- Aluminium plate manufactured according to aerospace-grade alloys EN 2693 or EN 2699
- Plate surface treatment through sulphuric acid anodizing process (EN 2284BC – Green) for enhanced durability
Design and Dimensions
- Aluminum plate incorporates 3 fastening holes spaced equally
- Dimensional tolerances strictly defined, ensuring precise fit-dimensions are in millimeters
- Bolt nominal thread diameters standardized to .1900 in (A), .2500 in (B), or .3125 in (C) to maintain compatibility with inch series couplings
- Mass and size details provided for multiple nominal diameters ranging from 0.625 inches to 2 inches
Performance Requirements
- Ability to sustain pressures up to 21,000 kPa (pressure rating depends on tubing material and thickness, aligned with EN 4814)
- Operating temperature range from −20 °C to 200 °C supports demanding aerospace environments
- Gasket seal adhesion ensures the fluorocarbon seal is firmly bonded to the aluminum plate with no bead protrusion outside cavity boundaries upon assembly
Assembly and Quality Control
- Assembly must follow guidelines set out in Technical Report TR 4815
- Quality management based on aerospace-specific systems including EN 9100, ensuring manufacturers comply with rigorous aerospace quality standards
- Identification and marking of seals conform to EN 2424 for traceability and verification
Applications
SIST EN 4809:2017 gasket seals are critical components in aerospace fluid systems and hydraulic installations where reliable pipe coupling performance is required under high-pressure and variable temperature conditions. Applications include:
- Aerospace hydraulic and fuel systems
- Fluid transport in aviation and space exploration vehicles
- High-pressure pipeline connections in defense aerospace assemblies
- Maintenance and manufacturing of aerospace-grade flange couplings requiring standardized, high-performance sealing solutions
These gasket seals contribute to safety, efficiency, and durability in aerospace fluid connections, addressing the demanding operational environments encountered in modern aerospace systems.
Related Standards
- EN 4814 – Aerospace flange couplings up to 21,000 kPa; technical specifications for inch series couplings
- EN 2815 (TR 4815) – Technical Report detailing assembly procedures for flange couplings covered by EN 4809
- EN 4054 – Technical specification for seals in fluorocarbon rubber bonded to aluminum alloy armatures
- EN 2798 – Specification for fluorocarbon rubber with low compression set, used in aerospace sealing
- EN 2284 – Specification for sulphuric acid anodizing treatment of aluminum alloys to enhance corrosion resistance
- EN 2424 – Aerospace product marking standards critical for traceability and identification
- EN 9100 – Quality management systems specifically for aviation, space, and defense organizations ensuring compliance with aerospace industry requirements
By adhering to SIST EN 4809:2017, aerospace manufacturers and maintenance organizations ensure gasket seals within flange couplings meet the highest industry standards for mechanical robustness, environmental resistance, and operational safety, facilitating reliable and certified aerospace fluid system assemblies.
Frequently Asked Questions
SIST EN 4809:2017 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Flange couplings - Gasket seal with fluorocarbon seal on aluminium plate with 3 fastening holes - Inch series". This standard covers: This standard specifies the characteristics of gasket seal with fluorocarbon seal on aluminium plate, 3 holes, for pipe couplings for inch series aerospace applications. Nominal pressure: up to 21 000 kPa; depends on the associated tube material and tube wall thickness in the assembly (see EN 4814). Temperature range: 20 °C to 200 °C. NOTE Assembly in accordance with TR 4815. This part should not be reused after disassembling.
This standard specifies the characteristics of gasket seal with fluorocarbon seal on aluminium plate, 3 holes, for pipe couplings for inch series aerospace applications. Nominal pressure: up to 21 000 kPa; depends on the associated tube material and tube wall thickness in the assembly (see EN 4814). Temperature range: 20 °C to 200 °C. NOTE Assembly in accordance with TR 4815. This part should not be reused after disassembling.
SIST EN 4809:2017 is classified under the following ICS (International Classification for Standards) categories: 23.040.60 - Flanges, couplings and joints; 49.025.20 - Aluminium; 49.080 - Aerospace fluid systems and components. The ICS classification helps identify the subject area and facilitates finding related standards.
You can purchase SIST EN 4809:2017 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2017
$HURQDYWLND3ULUREQLþQHVSRMNH5REQRWHVQLORVIOXRURNDUERQVNR]DOLYNRQD
DOXPLQLMVNLSORãþLVSULWUGLOQLPLOXNQMDPL3DOþQHPHUH
Aerospace series - Flange couplings - Gasket seal with fluorocarbon seal on aluminium
plate with 3 fastening holes - Inch series
Luft- und Raumfahrt - Rohrverschraubung mit Flanschen - Flachdichtung aus
Fluorocarbon-Elastomer, mit Aluminiumarmierung mit 3 Befestigungslöchern - Inch-
Reihe
Série aérospatiale - Raccordement à bride - Joint plaque avec joint en fluorocarbone sur
plaque en aluminium avec 3 trous de fixation - Série en inches
Ta slovenski standard je istoveten z: EN 4809:2017
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
49.025.20 Aluminij Aluminium
49.080 /HWDOVNLLQYHVROMVNL Aerospace fluid systems and
KLGUDYOLþQLVLVWHPLLQGHOL components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 4809
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2017
EUROPÄISCHE NORM
ICS 49.080
English Version
Aerospace series - Flange couplings - Gasket seal with
fluorocarbon seal on aluminium plate with 3 fastening
holes - Inch series
Série aérospatiale - Raccordement à bride - Joint Luft- und Raumfahrt - Rohrverschraubung mit
plaque avec joint en fluorocarbone sur plaque en Flanschen - Flachdichtung aus Fluorocarbon-
aluminium avec 3 trous de fixation - Série en inches Elastomer, mit Aluminiumarmierung mit 3
Befestigungslöchern - Inch-Reihe
This European Standard was approved by CEN on 14 November 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, Serbia, 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
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4809:2017 E
worldwide for CEN national Members.
Contents
Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Required characteristics . 5
4 Designation . 7
5 Identification marking . 7
6 Technical specification . 7
7 Quality Assurance. 7
European foreword
This document (EN 4809:2017) has been prepared by the Aerospace and Defence Industries Association of
Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this European
Standard has received the approval of the National Associations and the Official Services of the member
countries of ASD, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of
...
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