EN 4186:2001
(Main)Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, cross
Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, cross
This standard specifies the characteristics of unions, cross , for pipe couplings 8°30', in titanium alloy, for aerospace
applications.
Nominal pressure: up to 28 000 kPa
Temperature range: 55 °C to 135 °C
Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Kreuzverschraubungen
Diese Norm legt die Eigenschaften von Kreuzverschraubungen, für Rohrverschraubungen 8°30', aus Titanlegierung, zur
Verwendung in der Luft- und Raumfahrt fest.
Nenndruck: bis 28 000 kPa
Temperaturbereich: 55 °C bis 135 °C
Série aérospatiale - Système de raccordement 8°30' en alliage de titane - Raccords en croix
La présente norme spécifie les caractéristiques des raccords en croix pour les systèmes de raccordement 8°30', en alliage
de titane, pour applications aérospatiales.
Pression nominale: jusqu'à 28 000 kPa
Plage de température: 55 °C à 135 °C
Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, cross
General Information
Overview
EN 4186:2001 is a CEN (AECMA-prepared) European Standard for aerospace series pipe coupling 8°30' in titanium alloy - specifically covering unions and cross fittings. It defines the required characteristics, configuration and acceptance criteria for titanium alloy unions and cross fittings used in aerospace fluid systems. The standard applies to fittings rated for nominal pressure up to 28 000 kPa and a temperature range 55 °C to 135 °C (as stated in the standard).
Key topics and requirements
- Configuration, dimensions and mass: Parts are specified by figure and table references (e.g., MJ thread sizes from MJ10 to MJ39) with dimensional tolerances and mass values given before lubrication.
- Threads and geometric form: Thread limits follow ISO 5855‑3; thread ends and geometric configuration reference EN 3274.
- Materials: Titanium alloy requirements reference EN 3311 / EN 3312 / EN 3314 / EN 3315 depending on form (bars, forgings, condition).
- Surface treatment and lubrication: Lubrication on threads and sealing faces per EN 2491; pre‑lubrication abrasive blasting with non‑metallic grit; specified lubricant film thickness 0.005 mm to 0.013 mm.
- Internal surface finishing: Radii between 0.3 mm and 1.0 mm and surface roughness of 0.8 μm; hand deburring is not permitted.
- Surface roughness and marking: Surface roughness per figure; marking in accordance with EN 2424 (style A).
- Technical specification and acceptance: Acceptance and qualification align with EN 3275 (type II) for pipe coupling performance.
Practical applications and users
- Who uses it: Aerospace component manufacturers, specification engineers, procurement teams, quality and test laboratories, and suppliers of high‑pressure titanium fittings.
- Where it’s applied: High‑pressure aircraft hydraulic and fluid distribution systems, situations demanding lightweight, corrosion‑resistant titanium unions/cross fittings rated up to 28 000 kPa. The standard helps ensure interchangeability, safety and consistent performance in aerospace fluid systems.
Related standards
- ISO 5855‑3 - MJ thread limits for fluid system fittings
- EN 3274 - Pipe coupling 8°30' - Thread ends - Geometric configuration
- EN 3275 - Pipe coupling 8°30' - Dynamic beam seal - Technical specification (type II)
- EN 2491 - Molybdenum disulphide dry lubricant coating methods
- EN 2424 - Marking of aerospace products
- EN 3311 / EN 3312 / EN 3314 / EN 3315 - Titanium alloy (TI‑P64001) material specifications
EN 4186:2001 is essential when specifying or procuring titanium alloy pipe coupling 8°30' unions and cross fittings for certified aerospace fluid systems, ensuring compliance with established dimensional, material and finishing criteria.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2004
Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, cross
Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, cross
Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung -
Kreuzverschraubungen
Série aérospatiale - Systeme de raccordement 8°30' en alliage de titane - Raccords en
croix
Ta slovenski standard je istoveten z: EN 4186:2001
ICS:
49.080 /HWDOVNLLQYHVROMVNL Aerospace fluid systems and
KLGUDYOLþQLVLVWHPLLQGHOL components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 4186
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2001
ICS 49.080
English version
Aerospace series - Pipe coupling 8°30' in titanium alloy -
Unions, cross
Série aérospatiale - Système de raccordement 8°30' en Luft- und Raumfahrt - Rohrverschraubung 8°30' aus
alliage de titane - Raccords en croix Titanlegierung - Kreuzverschraubungen
This European Standard was approved by CEN on 28 February 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4186:2001 E
worldwide for CEN national Members.
Foreword
This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA).
After inquiries 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 AECMA, 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 April 2002, and conflicting national standards shall be withdrawn at the latest by April 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are
bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany,
Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
1 Scope
This standard specifies the characteristics of unions, cross , for pipe couplings 8°30', in titanium alloy
...
Frequently Asked Questions
EN 4186:2001 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, cross". This standard covers: This standard specifies the characteristics of unions, cross , for pipe couplings 8°30', in titanium alloy, for aerospace applications. Nominal pressure: up to 28 000 kPa Temperature range: 55 °C to 135 °C
This standard specifies the characteristics of unions, cross , for pipe couplings 8°30', in titanium alloy, for aerospace applications. Nominal pressure: up to 28 000 kPa Temperature range: 55 °C to 135 °C
EN 4186:2001 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.
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