EN 4806:2017
(Main)Aerospace series - Flange couplings - Weld coupling, straight, in nickel alloy - Inch series
General Information
- Abstract
This standard specifies the characteristics of straight welded coupling in nickel alloy 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.
- Status
- Published
- Publication Date
- 13-Jun-2017
- Withdrawal Date
- 30-Dec-2017
- 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
Overview - EN 4806:2017 (Flange couplings, weld coupling, nickel alloy, inch series)
EN 4806:2017 is a CEN aerospace series standard that defines the characteristics of straight welded coupling in nickel alloy for swivel flange couplings in the inch series. It specifies geometry, tolerances, material and surface treatment requirements, marking and quality assurance rules for components used in aerospace fluid systems. Dimensional data and nominal pressure limits are referenced in the standard’s Table 1 and the related technical specification EN 4814.
Key topics and technical requirements
- Configuration, dimensions and tolerances
- Detailed dimensional data (in mm) and tolerances are given (see Figure 1 and Table 1); inch-series nominal diameters are tabulated.
- Tube wall thickness codes identified (A = 0.711 mm, B = 0.889 mm) and mass estimates (approx. kg/1 000 parts).
- Material and surface treatment
- Acceptable nickel‑base alloy sources: EN 4380, EN 3671 or EN 4379 (heat‑resisting Ni alloys).
- Surface finish requirement: passivation per EN 2516.
- Nominal pressure and assembly
- Parts shall withstand nominal pressures listed in Table 1. Assembly pressure performance depends on associated seal, tube material properties, tube diameter and wall thickness (see EN 4814).
- Note: assembly guidance and design rules are given in TR 4815.
- Designation and marking
- Component designation format and identification marking follow EN 2424 (category A).
- Quality assurance
- Manufacturer approval and quality management expectations reference EN 9100.
Practical applications - who uses EN 4806:2017
- Aerospace component manufacturers producing flange couplings and weld coupling fittings in nickel alloys.
- Design and stress engineers specifying fluid system hardware for aircraft and space systems.
- Procurement and quality managers verifying supplier conformity, marking and traceability.
- Maintenance, repair and overhaul (MRO) organizations ensuring replacement parts meet aerospace dimensional and material requirements.
- Regulatory and certification engineers referencing standardized parts for system qualification.
Related standards
- EN 4814 - Flange couplings up to 21 000 kPa - Technical specification (inch series)
- TR 4815 - Assembly/design guidance for flange couplings (inch series)
- EN 2424 - Marking of aerospace products
- EN 2516 - Passivation of corrosion resisting steels and decontamination of nickel base alloys
- EN 4380 / EN 3671 / EN 4379 - Specified nickel‑base alloy material standards
- EN 9100 - Quality management for aerospace organizations
EN 4806:2017 is essential when specifying or manufacturing inch‑series swivel flange couplings in nickel alloys to ensure consistent dimensions, material treatment, marking and traceability across the aerospace supply chain.
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 4806:2017 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Flange couplings - Weld coupling, straight, in nickel alloy - Inch series". This standard covers: This standard specifies the characteristics of straight welded coupling in nickel alloy 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.
This standard specifies the characteristics of straight welded coupling in nickel alloy 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.
EN 4806:2017 is classified under the following ICS (International Classification for Standards) categories: 49.080 - Aerospace fluid systems and components. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 4806:2017 has the following relationships with other standards: It is inter standard links to EN 9100:2018, EN 3671:2007, EN 2516:2023, EN 4379:2007, EN 2424:2008, EN 4814:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 4806:2017 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-oktober-2017
$HURQDYWLND3ULUREQLþQHVSRMNH9DULOQDVSRMNDUDYQDL]QLNOMHYH]OLWLQH3DOþQH
PHUH
Aerospace series - Flange couplings - Weld coupling, Straight, in nickel alloy - Inch
series
Luft- und Raumfahrt - Rohrverschraubung mit Flanschen und Schweißstutzen, gerade,
aus Nickellegierung - Inch-Reihe
Série aérospatiale - Raccordement à bride - Raccord à souder, droit, en alliage de nickel
- Série en inches
Ta slovenski standard je istoveten z: EN 4806:2017
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 4806
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2017
EUROPÄISCHE NORM
ICS 49.080
English Version
Aerospace series - Flange couplings - Weld coupling,
straight, in nickel alloy - Inch series
Série aérospatiale - Raccordement à bride - Raccord à Luft- und Raumfahrt - Rohrverschraubung mit
souder, droit, en alliage de nickel - Série en inches Flanschen - Schweißstutzen, gerade, aus
Nickellegierung - 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 4806:2017 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 4806:2017) 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 December 2017, and confli
...