EN 3083:2001
(Main)Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, bulkhead, long welded end, for repair
Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, bulkhead, long welded end, for repair
This standard specifies the characteristics of unions, bulkhead, long, welded end for pipe couplings 8°30', in titanium alloy,
for aerospace applications to be used as repair couplings to replace EN 3691.
Nominal pressure: up to 28 000 kPa
Temperature range: 55 °C to 135 °C
Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Gerade Schottverschraubungen, lang mit Anschweißende, für Reparatur
Diese Norm legt die Eigenschaften von geraden Schottverschraubungen mit Anschweißende, lang, für Rohr-
verschraubungen 8°30' aus Titanlegierung, zur Verwendung in der Luft- und Raumfahrt fest, die für Reparaturzwecke zum
Austausch gegen Verschraubungen nach EN 3691 zu verwenden sind.
Nenndruck: bis 28 000 kPa
Temperaturbereich: 55 °C bis 135 °C
Série aérospatiale - Système de raccordement 8°30' en alliage de titane - Raccords droits à souder pour traversée de cloison, type long, pour réparation
La présente norme spécifie les caractéristiques des raccords droits pour traversée de cloison, type long, à souder, pour
les systèmes de raccordement 8°30', en alliage de titane, pour applications aérospatiales, à utiliser comme éléments de
réparation en remplacement de EN 3691.
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, bulkhead, long welded end, for repair
General Information
Relations
Overview
EN 3083:2001 specifies the characteristics of pipe coupling 8°30' unions, bulkhead and long welded-end repair couplings in titanium alloy for aerospace applications. Intended as a replacement for EN 3691, this CEN/AECMA aerospace series standard covers dimensional configuration, materials, surface treatment, lubrication, marking and installation details for repair fittings rated to a nominal pressure up to 28 000 kPa and a temperature range of 55 °C to 135 °C.
Key topics and technical requirements
- Scope and purpose: Defines repair couplings (unions, bulkhead, long welded ends) for pipe coupling 8°30' in titanium alloy for aerospace fluid systems.
- Dimensions and configuration: Includes standard geometric configurations and dimensional tables (codes related to pipe OD/wall thickness and pressure classification); values apply before lubrication.
- Materials: References titanium alloy specifications (see EN 3311 / EN 3314) for compatible alloys and forms for machining.
- Threads and sealing: Uses aerospace MJ thread limits (ISO 5855-3) and coupling end geometry per EN 2656, EN 3274 and EN 3275 for sealing faces and dynamic beam seals.
- Surface treatment & lubrication: Welded end area left untreated (min. 10 mm); thread and sealing face lubrication per EN 2491 (molybdenum disulphide dry lubricant) with specified film thickness and preparatory abrasive blasting.
- Surface roughness & marking: Surface finish requirements per figures in the standard; marking per EN 2424 (style A).
- Installation & acceptance: Installation details and technical acceptance follow EN 3275 (type II) and include washer/bulkhead layout and grip length guidance.
Practical applications and users
- Who uses EN 3083:2001:
- Aerospace OEMs and MRO organizations performing repairs on fluid systems.
- Design and stress engineers specifying replacement couplings for aircraft hydraulic, fuel or pneumatic lines.
- Procurement and quality teams verifying conformity of titanium repair fittings.
- Why it matters:
- Ensures interchangeability and safe pressure/temperature performance of repair couplings in critical aerospace fluid systems.
- Provides harmonized requirements for materials, thread compatibility and lubrication to reduce maintenance risk and ensure regulatory compliance.
Related standards
- ISO 5855-3 - MJ threads (limit dimensions for fittings)
- EN 2656 - Coupling ends, welded - geometric configuration
- EN 3274 / EN 3275 - Thread/seal geometry and technical specification
- EN 3311 / EN 3314 - Titanium alloy material specifications
- EN 2491 - Molybdenum disulphide dry lubricants
- EN 2424 - Marking of aerospace products
EN 3083:2001 is essential for anyone specifying or sourcing titanium alloy pipe coupling 8°30' repair unions and bulkhead fittings in aerospace maintenance and repair operations.
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 - Unions, bulkhead, long welded end, for repairLuft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Gerade Schottverschraubungen, lang mit Anschweißende, für ReparaturSérie aérospatiale - Systeme de raccordement 8°30' en alliage de titane - Raccords droits a souder pour traversée de cloison, type long, pour réparationAerospace series - Pipe coupling 8°30' in titanium alloy - Unions, bulkhead, long welded end, for repair49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 3083:2001SIST EN 3083:2004en01-maj-2004SIST EN 3083:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3083October 2001ICS 49.080English versionAerospace series - Pipe coupling 8°30' in titanium alloy -Unions, bulkhead, long welded end, for repairSérie aérospatiale - Système de raccordement 8°30' enalliage de titane - Raccords droits à souder pour traverséede cloison, type long, pour réparationLuft- und Raumfahrt - Rohrverschraubung 8°30' ausTitanlegierung - Gerade Schottverschraubungen, lang mitAnschweißende, für ReparaturThis European Standard was approved by CEN on 20 January 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 3083:2001 ESIST EN 3083:2004
ScopeThis standard specifies the characteristics of unions, bulkhead, long, welded end for pipe couplings 8°30', in titanium alloy,for aerospace applications to be used as repair couplings to replace EN 3691.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 publi
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Frequently Asked Questions
EN 3083:2001 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, bulkhead, long welded end, for repair". This standard covers: This standard specifies the characteristics of unions, bulkhead, long, welded end for pipe couplings 8°30', in titanium alloy, for aerospace applications to be used as repair couplings to replace EN 3691. Nominal pressure: up to 28 000 kPa Temperature range: 55 °C to 135 °C
This standard specifies the characteristics of unions, bulkhead, long, welded end for pipe couplings 8°30', in titanium alloy, for aerospace applications to be used as repair couplings to replace EN 3691. Nominal pressure: up to 28 000 kPa Temperature range: 55 °C to 135 °C
EN 3083:2001 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.
EN 3083:2001 has the following relationships with other standards: It is inter standard links to EN 3083:2001/AC:2003. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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