EN 4805:2017

Aerospace series - Flange couplings - Weld coupling, straight, in heat resisting steel - Inch series

This European Standard specifies the characteristics of straight welded couplings in heat resisting steel for swivel flange couplings for inch series aerospace applications.
Nominal pressure: The parts shall withstand nominal pressures given in Table 1. The nominal pressure of the assembly depends on associated seal, tube material characteristics, tube diameter and tube wall thickness (see EN 4814).
NOTE   Assembly in accordance with TR 4815.

Luft- und Raumfahrt - Rohrverschraubung mit Flanschen - Schweißstutzen, gerade, aus hochwarmfestem Stahl - Inch-Reihe

Diese Europäische Norm legt die Eigenschaften von gerade geschweißten Stutzen aus hochwarmfestem Stahl für Rohrverschraubungen mit losen Flanschen in Anwendungen der Luft- und Raumfahrt (Inch-Reihe) fest.
Nenndruck: Die Teile müssen den Nenndrücken in Tabelle 1 widerstehen. Der Nenndruck des Aufbaus hängt von der Dichtung, den Eigenschaften des Rohrmaterials, dem Rohrdurchmesser und der Dicke der Rohrwand ab (siehe EN 4814).
ANMERKUNG   Aufbau nach TR 4815.

Série aérospatiale - Raccordement à bride - Raccord à souder, droit, en acier résistant à chaud - Série en inches

La présente norme spécifie les caractéristiques des raccords droits à souder en acier résistant à chaud pour raccordements à bride flottante destinés aux applications aérospatiales des séries en inches.
Pression nominale : Les pièces doivent résister aux pressions nominales données dans le Tableau 1. La pression nominale du montage dépend du joint, des caractéristiques du matériau du tube, du diamètre du tube et de l'épaisseur de paroi du tube associés (voir l'EN 4814).

Aeronavtika - Prirobnične spojke - Varilna spojka, ravna, iz toplotno odpornega jekla - Palčne mere

Ta standard določa karakteristike ravnih varilnih spojk iz toplotno odpornega jekla za vrtljive prirobične spojke v palčnih merah za aeronavtiko.
Nazivni tlak: deli morajo prenesti nazivne tlake, podane v tabeli 1. Nazivni tlak sestava je odvisen od povezanega tesnila, lastnosti materiala cevi, premera cevi in debeline stene cevi (glej standard EN 4814).
OPOMBA Sestav v skladu s TR 4815.

General Information

• Status: Published
• Publication Date: 13-Jun-2017
• Withdrawal Date: 30-Dec-2017
• 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: 14-Jun-2017
• Completion Date: 14-Jun-2017
• Ref Project: SIST EN 4805:2017 - Aerospace series - Flange couplings - Weld coupling, straight, in heat resisting steel - Inch series

Overview

EN 4805:2017 is a European Standard developed by CEN that defines the characteristics and specifications for straight weld couplings made of heat-resisting steel, designed for swivel flange couplings in aerospace applications. This standard applies specifically to inch series components used within aerospace fluid systems requiring high pressure resistance and durability. The standard ensures uniform quality, safety, and interoperability of flange couplings in the aerospace industry.

Key Topics

• Scope and Application
  EN 4805:2017 covers the design and technical requirements of straight welded couplings for swivel flange couplings in aerospace systems, focusing on heat-resisting steel materials suitable for high-temperature environments.

• Material Specifications
  Materials referenced include aerospace-grade steels compliant with EN 3363, EN 3468, and EN 3487, featuring heat-resistant properties and mechanical strengths ranging from 485 MPa to 700 MPa. Surface passivation according to EN 2516 ensures corrosion resistance and longevity.

• Dimensional Requirements
  The standard specifies precise dimensions, tolerances, and mass values for couplings in inch sizes, with detailed tables outlining nominal diameters, wall thickness codes, flange dimensions, and allowable deviations.

• Nominal Pressure and Assembly
  The parts must withstand nominal pressures detailed in the document (Table 1). Pressure rating depends on the material of the tube, the associated seals, tube diameter, and wall thickness in accordance with EN 4814. Assembly procedures are aligned with TR 4815 to guarantee safety and functionality.

• Marking and Identification
  Components must be marked following EN 2424 Category A standards to ensure traceability, including manufacturer monogram and identity block markings.

• Quality Assurance
  Manufacturers are required to comply with quality management systems based on EN 9100, underlining the importance of stringent aerospace standards in production and approval processes.

Applications

• Aerospace Fluid Systems
  EN 4805:2017 flange couplings are critical in aerospace hydraulic and fluid systems where integrity under high pressure and temperature is essential.

• Swivel Flange Couplings for Inch Series Tubing
  Suitable for aerospace pipelines that require straight welded connections in inch dimensions, ensuring secure attachment and fluid-tight seals.

• Heat-Resistant Environments
  Couplings used in aircraft engine systems, fuel lines, and other high-temperature aerospace components benefit from the heat-resisting steel standards set in EN 4805.

• Maintenance and Replacement Parts
  The standardized dimensions and pressure ratings simplify the replacement and maintenance routines for aerospace mechanical assemblies.

Related Standards

• EN 4814: Aerospace Series – Flange Couplings Technical Specification
  Defines the technical specifications for flange couplings up to 21,000 kPa, serving as a complementary document for design and performance validation.

• TR 4815: Aerospace Series – Flange Couplings Design Standard
  Provides guidance on the correct assembly and design practices for flange couplings compliant with EN 4805.

• EN 2424: Aerospace Series – Marking of Aerospace Products
  Details the marking methods to ensure product identification and traceability in aerospace manufacturing.

• EN 2516: Aerospace Series – Passivation of Corrosion Resisting Steels
  Establishes the surface treatment requirements to protect flange couplings from corrosion within demanding environments.

• EN 9100: Quality Management Systems for Aviation, Space, and Defense Organizations
  Ensures manufacturers meet quality demands specific to aerospace and defense sectors, emphasizing product consistency and reliability.

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By adhering to EN 4805:2017, aerospace manufacturers and suppliers can confidently produce and utilize flange couplings that meet rigorous standards for performance, safety, and durability in heat-resisting steel applications for inch-series tubing. This standard supports the aerospace industry's need for reliable components designed to withstand extreme operating conditions.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2017
$HURQDYWLND3ULUREQLþQHVSRMNH9DULOQDVSRMNDUDYQDL]WRSORWQRRGSRUQHJD
MHNOD3DOþQHPHUH
Aerospace series - Flange couplings - Weld coupling, straight, in heat resisting steel -
Inch series
Luft- und Raumfahrt - Rohrverschraubung mit Flanschen und Schweißstutzen, gerade,
aus hochwarmfestem Stahl - Inch-Reihe
Série aérospatiale - Raccordement à bride - Raccord à souder, droit, en acier résistant à
chaud - Série en inches
Ta slovenski standard je istoveten z: EN 4805:2017
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
49.025.10 Jekla Steels
49.080 /HWDOVNLLQYHVROMVNL Aerospace fluid systems and
KLGUDYOLþQLVLVWHPLLQGHOL components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 4805
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2017
EUROPÄISCHE NORM
ICS 49.080
English Version
Aerospace series - Flange couplings - Weld coupling,
straight, in heat resisting steel - Inch series
Série aérospatiale - Raccordement à bride - Raccord à Luft- und Raumfahrt - Rohrverschraubung mit
souder, droit, en acier résistant à chaud - Série en Flanschen - Schweißstutzen, gerade, aus
inches 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 4805:2017 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 4805:2017) 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 an identical
text or by endorsement, at the latest by
...