SIST EN 4812:2017

Aerospace series - Flange couplings - Gasket seal with nickel alloy C seal on heat resisting steel plate with 4 fastening holes - Inch series

This standard specifies the characteristics of gasket seal with nickel alloy C seal on heat resisting steel, 4 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: - 55 °C to 600 °C.
NOTE   Assembly in accordance with TR 4815.
This part should not be reused after disassembling.

Luft- und Raumfahrt - Rohrverschraubung mit Flanschen - Flachdichtung aus Nickellegierung, mit Stahlarmierung aus hochwarmfestem Stahl mit 4 Befestigungslöchern - Inch-Reihe

Diese Europäische Norm legt die Eigenschaften von Flachdichtung aus Nickellegierung mit Stahlarmierung auf hochwarmfestem Stahl mit 4 Löchern für Rohrverbindungen (Inch-Reihe) in Anwendungen der Luft- und Raumfahrt fest.
Nenndruck: Bis zu 21 000 kPa; abhängig von dem Rohrmaterial und der Dicke der Rohrwand bei dem Aufbau (siehe EN 4814).
Temperaturbereich: −55 °C bis 600 °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 C en alliage de nickel sur plaque en acier résistant à chaud avec 4 trous de fixation - Série en inches

Aeronavtika - Prirobnične spojke - Robna tesnila z nikljevo zlitino na toplotno odporni jekleni plošči s 4 pritrdilnimi luknjami - Palčne mere

Ta standard določa karakteristike robnega tesnila z nikljevo zlitino na toplotno odporni jekleni plošči s 4 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 −55 °C do 600 °C
OPOMBA Sestav v skladu s TR 4815.
Tega dela se po demontaži naj ne bi znova uporabilo.

General Information

• Status: Published
• Publication Date: 29-Aug-2017
• ICS: 23.040.60 - Flanges, couplings and joints
• ICS: 49.080 - Aerospace fluid systems and components
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Jun-2017
• Due Date: 07-Aug-2017
• Completion Date: 30-Aug-2017
• Ref Project: EN 4812:2017 - Aerospace series - Flange couplings - Gasket seal with nickel alloy C seal on heat resisting steel plate with 4 fastening holes - Inch series

Overview

SIST EN 4812:2017 is a European standard developed by CEN that specifies the characteristics of aerospace flange couplings featuring a gasket seal with a nickel alloy C seal mounted on a heat-resisting steel plate. Designed for inch series pipe couplings, this standard addresses critical requirements for applications in aerospace fluid systems and components operating under high pressure and temperature conditions. The gasket seal assembly incorporates a plate with 4 fastening holes and is engineered for nominal pressures up to 21,000 kPa and a wide temperature range from -55 °C to 600 °C.

Key Topics

• Scope and Purpose
  SIST EN 4812:2017 focuses on the configuration, dimensions, materials, surface treatments, and technical specifications of aerospace-grade flange couplings with gasket seals. It ensures compatibility with inch series pipe couplings for aerospace applications.

• Materials and Treatments
  The gasket seal plate is made from heat-resisting steels compliant with EN 3480 or EN 3488 standards. The nickel alloy C seal conforms to EN 2407 and EN 2516 passivation standards ensuring corrosion resistance, durability, and long-term performance in harsh aerospace environments.

• Design and Dimensions
  The standard defines precise dimensions, tolerances, and mass for a range of nominal diameters (from 0.625 to 2.000 inches), including details on hole diameters and assembly characteristics. This ensures interchangeability and reliable sealing performance.

• Performance Requirements
  Designed to support nominal pressures up to 21,000 kPa, SIST EN 4812:2017 gasket seals are validated within aerospace assembly guidelines set out in TR 4815. The gasket is single-use and must not be reused after disassembly to maintain integrity.

• Marking and Quality Assurance
  Identification markings follow EN 2424 requirements without embossing, facilitating traceability. Manufacturers must comply with quality management standards in EN 9100 to meet aerospace industry expectations.

Applications

• Aerospace Fluid Systems
  SIST EN 4812:2017 gasket seals are crucial in fluid transport systems onboard aircraft and spacecraft where high pressure and extreme temperature resistance are vital.

• Pipe Couplings in Aerospace
  Used within inch series flange couplings, these gasket seals ensure leak-proof connections between pipes, contributing to the safety and efficiency of aerospace hydraulic and pneumatic systems.

• Heat-Resistant and Corrosion-Resistant Sealing Solutions
  Suitable for high-temperature aerospace environments, these gasket seals prevent fluid leakage even under thermal cycling and mechanical stress conditions.

• Maintenance and Assembly
  The standard guides the correct assembly procedure to ensure proper sealing performance and longevity, highlighting that gasket seals are not reusable once disassembled to avoid reliability issues.

Related Standards

• EN 4814: Aerospace Flange Couplings Technical Specification
  Provides detailed technical specifications for flange couplings associated with the gasket seals described in EN 4812.

• EN 2407: Nickel Alloy Materials
  Specifies the nickel alloy C material used for the sealing component.

• EN 2516: Passivation of Corrosion Resistant Steels
  Defines the passivation process for steel plates to enhance corrosion resistance.

• EN 9100: Quality Management for Aviation, Space, and Defence
  Outlines quality system requirements for manufacturers complying with aerospace industry standards.

• TR 4815: Design Recommendations for Flange Couplings
  Provides assembly guidelines relevant to EN 4812 gasket seals ensuring reliable installation.

---

Keywords: aerospace flange couplings, nickel alloy C seal, heat-resisting steel plate, gasket seal, inch series, aerospace pipe couplings, aerospace standards EN 4812, high pressure gasket, temperature resistant seal, aerospace fluid systems, EN 9100 quality, aerospace material passivation.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2017
$HURQDYWLND3ULUREQLþQHVSRMNH5REQDWHVQLOD]QLNOMHYR]OLWLQRQDWRSORWQR
RGSRUQLMHNOHQLSORãþLVSULWUGLOQLPLOXNQMDPL3DOþQHPHUH
Aerospace series - Flange couplings - Gasket seal with nickel alloy C seal on heat
resisting steel plate with 4 fastening holes - Inch series
Luft- und Raumfahrt - Rohrverschraubung mit Flanschen - Flachdichtung aus
Nickellegierung, mit Stahlarmierung aus hochwarmfestem Stahl mit 4
Befestigungslöchern - Inch-Reihe
Série aérospatiale - Raccordement à bride - Joint plaque avec joint C en alliage de nickel
sur plaque en acier résistant à chaud avec 4 trous de fixation - Série en inches
Ta slovenski standard je istoveten z: EN 4812:2017
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
49.080 /HWDOVNLLQYHVROMVNL Aerospace fluid systems and
KLGUDYOLþQLVLVWHPLLQGHOL components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 4812
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2017
EUROPÄISCHE NORM
ICS 49.080
English Version
Aerospace series - Flange couplings - Gasket seal with
nickel alloy C seal on heat resisting steel plate with 4
fastening holes - Inch series
Série aérospatiale - Raccordement à bride - Joint Luft- und Raumfahrt - Rohrverschraubung mit
plaque avec joint C en alliage de nickel sur plaque en Flanschen - Flachdichtung aus Nickellegierung, mit
acier résistant à chaud avec 4 trous de fixation - Série Stahlarmierung aus hochwarmfestem Stahl mit 4
en inches 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 4812:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Required characteristics . 4
4 Designation . 6
5 Identification marking . 6
6 Technical specification . 6
7 Quality Assurance. 6

European foreword
This document (EN 4812:2017) 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 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 an identical
text or by endorsement, at the latest by November 2017, and conflicting national standards shall be
withdrawn at the latest by November 2017.
Attention
...