Aerospace series - Pipe coupling 8°30' in titanium alloy - Equipped bling ferrules

This European Standard specifies the characteristics of equipped blind ferrules for pipe couplings 8°30’, in titanium alloy, for aerospace applications.

Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Ausgerüstete Blindstutzen

Série aérospatiale - Système de raccordement 8°30’ en alliage de titane - Obturateurs équipés

La présente Norme Européenne spécifie les caractéristiques des obturateurs pour les systèmes de raccordement 8°30’, en alliage de titane, pour applications aérospatiales.

Aeronavtika - Cevni priključek 8°30' iz titanove zlitine - Opremljene slepe tulke

Ta evropski standard določa lastnosti opremljenih slepih tulk za cevne priključke 8°30’, iz titanove zlitine, za uporabo v aeronavtiki.

General Information

Status
Published
Publication Date
04-Dec-2014
ICS
49.025.30 - Titanium
 
49.080 - Aerospace fluid systems and components
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
06-Nov-2014
Due Date
11-Jan-2015
Completion Date
05-Dec-2014
Ref Project
EN 4686:2014 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Equipped blind ferrules

Overview

EN 4686:2014 defines the required characteristics for equipped blind ferrules used with pipe coupling 8°30' in titanium alloy for aerospace fluid systems. The European Standard specifies configuration, dimensions, surface finish, materials and surface treatments for blind ferrules intended for aerospace applications, and sets rules for designation and marking to ensure interchangeability and traceability.

Key Topics

  • Scope and purpose
    • Specifies characteristics of equipped blind ferrules for pipe coupling 8°30' in titanium alloy for aerospace use.
  • Configuration, dimensions and mass
    • Dimensioning and mass are given by the standard’s figures and tables (see Figure 1 / Table 1 in EN 4686). Thread details reference ISO 5855-3 (MJ threads).
  • Surface roughness and finishing
    • Surface roughness limits are defined (per the figures in the standard) and coatings/lubrication requirements are given for mating areas.
  • Materials
    • Titanium alloy ferrules and nuts conform to EN 3311 or EN 3314 (TI-P64001 / Ti‑6Al‑4V variants referenced). External retaining rings are stainless steel per DIN 471.
  • Surface treatment
    • PTFE lubrication/coating is required on the 110° nut contact area (see EN 4031). An optional red external coating per FED‑STD‑595 (color FS 11136) in accordance with MIL‑PRF‑24635 is specified for non-flightworthy components.
  • Designation and marking
    • Example designation format: EN4686-05R (standard number + code + optional red-coating code). Marking follows EN 3269 and EN 4031; note that red paint may obscure EN 4031 marks.
  • Technical specification
    • Technical performance and test requirements reference EN 3275.

Applications

  • Who uses EN 4686:2014
    • Aerospace component designers and engineers, manufacturers of hydraulic and pneumatic tubing systems, quality and certification teams, procurement specialists, and MRO organizations.
  • Practical value
    • Ensures dimensional interchangeability and material compatibility for titanium alloy blind ferrules in aircraft fluid systems.
    • Provides clear guidance on coatings (PTFE) and optional identification coatings to support assembly, inspection and maintenance procedures.
    • Supports compliance with broader aerospace supply-chain requirements and simplifies supplier specifications.

Related Standards

  • EN 3269 (ferrules, blind, with dynamic beam seal end)
  • EN 3275 (dynamic beam seal technical specification)
  • EN 4031 (nuts for welded ferrule)
  • EN 3311 / EN 3314 (titanium alloy material specifications)
  • ISO 5855-3 (MJ thread limits)
  • DIN 471 (retaining rings)
  • MIL‑PRF‑24635 and FED‑STD‑595 (coating and color references)

Keywords: EN 4686:2014, pipe coupling 8°30', titanium alloy, equipped blind ferrules, aerospace standard, ferrule specification.

Frequently Asked Questions

SIST EN 4686:2015 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Pipe coupling 8°30' in titanium alloy - Equipped bling ferrules". This standard covers: This European Standard specifies the characteristics of equipped blind ferrules for pipe couplings 8°30’, in titanium alloy, for aerospace applications.

This European Standard specifies the characteristics of equipped blind ferrules for pipe couplings 8°30’, in titanium alloy, for aerospace applications.

SIST EN 4686:2015 is classified under the following ICS (International Classification for Standards) categories: 49.025.30 - Titanium; 49.080 - Aerospace fluid systems and components. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 4686:2015 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)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Ausgerüstete BlindstutzenSérie aérospatiale - Système de raccordement 8°30’ en alliage de titane - Obturateurs équipésAerospace series - Pipe coupling 8°30' in titanium alloy - Equipped bling ferrules49.080Aerospace fluid systems and components49.025.30TitanTitaniumICS:Ta slovenski standard je istoveten z:EN 4686:2014SIST EN 4686:2015en,fr,de01-januar-2015SIST EN 4686:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4686
October 2014 ICS 49.080 English Version
Aerospace series - Pipe coupling 8°30' in titanium alloy - Equipped blind ferrules
Série aérospatiale - Système de raccordement 8°30' en alliage de titane - Obturateurs équipés
Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Ausgerüstete Blindstutzen This European Standard was approved by CEN on 4 January 2014.
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, 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 © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4686:2014 ESIST EN 4686:2015

Page Foreword .3 1 Scope .4 2 Normative references .4 3 Required characteristics .4 3.1 Configuration – Dimensions – Mass .4 3.2 Surface roughness .4 3.3 Materials .4 3.4 Surface treatment .5 4 Designation .6 5 Marking .7 6 Technical specification .7
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