Aerospace series - Flange couplings - Swivel flange with 3 fastening holes, in heat resisting steel - Inch series

This European Standard specifies the characteristics of swivel flanges, 3 holes, for flange couplings in heat resisting steel for inch series aerospace applications.
Nominal pressure: up to 21 000 kPa; depends on associated seal, tube material, tube diameter and tube wall thickness in the assembly (see EN 4814).
NOTE   Assembly in accordance with TR 4815.

Luft- und Raumfahrt - Rohrverschraubung mit Flanschen - Losen Flanschen mit 3 Befestigungslöchern, aus hochwarmfestem Stahl - Inch-Reihe

Diese Europäische Norm legt die Eigenschaften von losen Flanschen mit 3 Löchern für Rohrverschraubung mit Flanschen aus hochwarmfestem Stahl in Anwendungen der Luft- und Raumfahrt (Inch-Reihe) fest.
Nenndruck: Bis zu 21 000 kPa; abhängig von der Dichtung, dem Rohrmaterial, dem Rohrdurchmesser und der Dicke der Rohrwand (siehe EN 4814).

Série aérospatiale - Raccordement à bride - Brides flottantes avec 3 trous de fixation en acier résistant à chaud - Série en inches

Aeronavtika - Prirobnične spojke - Vrtljiva prirobnica iz toplotno odpornega jekla s tremi pritrdilnimi luknjami - Colska izvedba

Ta evropski standard določa lastnosti vrtljivih prirobnic s tremi luknjami za prirobnične spojke iz toplotno odpornega jekla za colsko izvedbo v aeronavtiki.
Nazivni tlak: do 21.000 kPa, odvisno od povezanega tesnila, materiala cevi, premera cevi in debeline stene cevi v sestavu (glej standard EN 4814).
OPOMBA: Sestav v skladu s standardom TR 4815.

General Information

Status
Published
Publication Date
24-May-2017
ICS
23.040.60 - Flanges, couplings and joints
 
49.080 - Aerospace fluid systems and components
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
19-May-2017
Due Date
24-Jul-2017
Completion Date
25-May-2017
Ref Project
EN 4801:2017 - Aerospace series - Flange couplings - Swivel flange with 3 fastening holes, in heat resisting steel - Inch series

Overview

EN 4801:2017 - Aerospace series - specifies the characteristics of swivel flanges with 3 fastening holes, manufactured in heat‑resisting steel for inch‑series flange couplings used in aerospace fluid systems. The standard defines configuration, dimensions, materials, surface treatment and marking for swivel flanges intended for high‑temperature and high‑pressure aerospace tube assemblies. Nominal pressure capability is stated up to 21 000 kPa, subject to the associated seal, tube material, diameter and wall thickness (see EN 4814).

Key topics and requirements

  • Configuration and dimensions: Detailed dimensional tables and drawings (Figure 1 / Table 2) covering inch nominal diameters (examples in the standard range from 0.625 in to 2.000 in) and associated flange codes (e.g. 10A, 10B … 32C). Dimensions and tolerances are specified in millimetres unless otherwise stated.
  • Hole pattern: Flanges feature 3 equally spaced fastening holes; location and geometry are defined for interchangeability.
  • Materials: Permitted heat‑resisting steels reference aerospace material standards (EN 3468, EN 3487, EN 4315). Material selection affects pressure rating and high‑temperature performance.
  • Surface treatment: Passivation per EN 2516 is mandated for corrosion resistance and compatibility with aerospace fluids.
  • Pressure rating: Nominal pressure up to 21 000 kPa, but final rating depends on the complete assembly (seal, tube material, tube diameter and wall thickness); see EN 4814 for technical specification.
  • Identification and marking: Marking requirements follow EN 2424 (category A) to ensure traceability.
  • Designation and mass: Part coding conventions and approximate mass (quoted per 1 000 parts) are provided.
  • Quality and conformity: Manufacturer approval and quality systems reference EN 9100; assembly guidance referenced in TR 4815.

Applications and users

  • Applications: Aerospace hydraulic and fuel fluid systems, high‑temperature tubing assemblies, repair and overhaul of aircraft hydraulic lines, and any application requiring a heat‑resistant swivel flange in inch sizes.
  • Who uses this standard:
    • Aerospace design and mechanical engineers (component selection and installation)
    • Manufacturers and machinists producing aerospace flanges
    • Procurement and supply chain for specification compliance
    • Quality, certification and maintenance teams ensuring traceability and conformity
    • Technical writers and drawing offices preparing parts lists and assembly drawings

Related standards

  • EN 4814 - Flange couplings up to 21 000 kPa - Technical specification (inch series)
  • TR 4815 - Assembly / Design standard for flange couplings
  • EN 2424 - Marking of aerospace products
  • EN 2516 - Passivation of corrosion resisting steels
  • EN 3468, EN 3487, EN 4315 - Aerospace material specifications
  • EN 9100 - Quality management for aviation, space and defense

Keywords: EN 4801:2017, swivel flange, flange couplings, heat resisting steel, aerospace series, inch series, 3 fastening holes, nominal pressure 21000 kPa, EN 4814, TR 4815, passivation.

Frequently Asked Questions

SIST EN 4801:2017 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Flange couplings - Swivel flange with 3 fastening holes, in heat resisting steel - Inch series". This standard covers: This European Standard specifies the characteristics of swivel flanges, 3 holes, for flange couplings in heat resisting steel for inch series aerospace applications. Nominal pressure: up to 21 000 kPa; depends on associated seal, tube material, tube diameter and tube wall thickness in the assembly (see EN 4814). NOTE Assembly in accordance with TR 4815.

This European Standard specifies the characteristics of swivel flanges, 3 holes, for flange couplings in heat resisting steel for inch series aerospace applications. Nominal pressure: up to 21 000 kPa; depends on associated seal, tube material, tube diameter and tube wall thickness in the assembly (see EN 4814). NOTE Assembly in accordance with TR 4815.

SIST EN 4801:2017 is classified under the following ICS (International Classification for Standards) categories: 23.040.60 - Flanges, couplings and joints; 49.080 - Aerospace fluid systems and components. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 4801:2017 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-julij-2017
$HURQDYWLND3ULUREQLþQHVSRMNH9UWOMLYDSULUREQLFDL]WRSORWQRRGSRUQHJDMHNODV
WUHPLSULWUGLOQLPLOXNQMDPL&ROVNDL]YHGED
Aerospace series - Flange couplings - Swivel flange with 3 fastening holes, in heat
resisting steel - Inch series
Luft- und Raumfahrt - Rohrverschraubung mit Flanschen - Losen Flanschen mit 3
Befestigungslöchern, aus hochwarmfestem Stahl - Inch-Reihe
Série aérospatiale - Raccordement à bride - Brides flottantes avec 3 trous de fixation en
acier résistant à chaud - Série en inches
Ta slovenski standard je istoveten z: EN 4801:2017
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 4801
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2017
EUROPÄISCHE NORM
ICS 49.080
English Version
Aerospace series - Flange couplings - Swivel flange with 3
fastening holes, in heat resisting steel - Inch series
Série aérospatiale - Raccordement à bride - Brides Luft- und Raumfahrt - Rohrverschraubung mit
flottantes avec 3 trous de fixation en acier résistant à Flanschen - Lose Flansche mit 3 Befestigungslöchern,
chaud - Série en inches aus hochwarmfestem Stahl - Inch-Reihe
This European Standard was approved by CEN on 21 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 4801:2017 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 4801:2017) 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 natio
...

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