EN 4194:2001
(Main)Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced, bulkhead
Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced, bulkhead
This standard specifies the characteristics of tees, reduced, bulkhead, 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 - T-Verschraubungen, reduziert T-Durchgang als Schottanschluss
Diese Norm legt die Eigenschaften von T-Verschraubungen, reduziert, T-Durchgang als Schottanschluss, 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 té, réduits pour traversée de cloison
La présente norme spécifie les caractéristiques des raccords en té pour traversée de cloison, réduits, 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 - Tees, reduced, bulkhead
General Information
Overview
EN 4194:2001 is a European standard developed by CEN that specifies the characteristics for aerospace pipe coupling tees made of titanium alloy with an 8°30' angle. This standard specifically addresses reduced, bulkhead tees designed for high-performance aerospace fluid systems. It ensures dimensional, material, and performance consistency in critical aerospace applications where durability, lightweight properties, and precise fluid handling are essential.
This standard supports nominal pressures up to 28,000 kPa and is applicable in a temperature range from -55 °C to +135 °C, aligning with the demanding operational environments encountered in aerospace engineering.
Key Topics
Material Specifications
The tees are manufactured from titanium alloy according to EN 3311, EN 3312, EN 3314, or EN 3315, ensuring optimal strength-to-weight ratios and corrosion resistance critical for aerospace fluid systems.Dimensional and Configuration Requirements
The standard provides detailed configurations and dimensional data based on connection sizes and thread types defined by ISO 5855-3 and EN 3274. These include mass calculations, surface roughness parameters, and precise thread dimensions to guarantee compatibility and performance.Surface Treatment and Finishing
Surface roughness specifications ensure sealing surfaces and threads meet aerospace quality requirements. Lubrication with molybdenum disulphide dry lubricants (EN 2491) is required on threaded and sealing faces after abrasive blasting, providing consistent torque and sealing performance.Marking and Identification
Marking requirements comply with EN 2424, allowing clear product identification and traceability in aerospace assembly and maintenance environments.Installation Guidelines
The standard includes installation details such as bulkhead integration, washer use per EN 3267, and thread engagement recommendations to ensure reliable sealing and mechanical integrity.
Applications
EN 4194:2001 pipe coupling tees are primarily utilized in:
Aerospace Fluid Systems
Used in fuel, hydraulic, and cooling fluid distribution where weight savings and corrosion resistance are critical.Aircraft and Spacecraft Engineering
Suitable for structural pipe coupling junctions in pressurized fluid circuits up to 28,000 kPa, performing reliably under temperature fluctuations from -55 °C to +135 °C.Bulkhead Penetration Solutions
The reduced bulkhead design enables secure and leak-resistant fluid passageways through partition walls within aerospace structures.
Related Standards
EN 4194:2001 integrates and references several key aerospace standards to harmonize pipe coupling characteristics:
- ISO 5855-3: MJ thread limits for fluid system fittings
- EN 2424: Aerospace marking requirements
- EN 2491: Dry lubricant coatings for aerospace components
- EN 3267: Washers in titanium alloys for bulkhead applications
- EN 3274 / EN 3275: Pipe coupling geometry and sealing specifications
These standards collectively ensure that the pipe couplings meet critical aerospace quality, safety, and interoperability requirements.
Keywords: EN 4194, aerospace pipe coupling, titanium alloy tee, reduced bulkhead tee, 8°30' pipe coupling, aerospace fluid systems, high-pressure pipe fittings, titanium fittings aerospace, aerospace piping standards, bulkhead pipe coupling
Frequently Asked Questions
EN 4194:2001 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced, bulkhead". This standard covers: This standard specifies the characteristics of tees, reduced, bulkhead, 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 tees, reduced, bulkhead, 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 4194:2001 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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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced, bulkheadLuft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - T-Verschraubungen, reduziert T-Durchgang als SchottanschlussSérie aérospatiale - Systeme de raccordement 8°30' en alliage de titane - Raccords en té, réduits pour traversée de cloisonAerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced, bulkhead49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 4194:2001SIST EN 4194:2004en01-maj-2004SIST EN 4194:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4194October 2001ICS 49.080English versionAerospace series - Pipe coupling 8°30' in titanium alloy - Tees,reduced, bulkheadSérie aérospatiale - Système de raccordement 8°30' enalliage de titane - Raccords en té, réduits pour traversée decloisonLuft- und Raumfahrt - Rohrverschraubung 8°30' ausTitanlegierung - T-Verschraubungen, reduziert T-Durchgang als SchottanschlussThis European Standard was approved by CEN on 19 April 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4194:2001 ESIST EN 4194:2004
ScopeThis standard specifies the characteristics of tees, reduced, bulkhead, for pipe couplings 8°30', in titanium alloy, foraerospace applications.Nominal pressure: up to 28 000 kPaTemperature range:
55 °C to 135 °C2
Normative referencesThis European standard incorporates by dated or undated reference provisions from other publications. These normativereferences are cited at the appropriate places in the text and the publications are listed hereafter. For dated references,subsequent amendments to or revisions of any of these publications apply to this European Standard only whenincorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies(including amendments).ISO 5855-3,
Aerospace series — MJ threads — Part 3: Limit dimensions for fittings for fluid systems.EN 2424,
Aerospace series — Marking of aerospace products.EN 2491,
Aerospace series — Molybdenum disulphide dry lubricants — Coating methods.EN 3267,
Aerospace series — Washers, bulkhead, in titanium alloy.EN 3274,
Aerospace series — Pipe coupling 8°30' — Thread ends — Geometric configuration.EN 3275,
Aerospace series — Pipe coupling 8°30' up
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