SIST EN 3084:2002
(Main)Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, welded end threaded for repair
Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, welded end threaded for repair
This standard specifies the characteristics of unions, welded end, threaded, for pipe couplings 8°30', in titanium alloy, for
aerospace applications to be used as repair couplings to replace EN 4233.
Nominal pressure: up to 28 000 kPa
Temperature range: 55 °C to 135 °C
Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Gerade Erschraubungen mit Anschweißende für Reparatur
Diese Norm legt die Eigenschaften von geraden Verschraubungen mit Anschweißende, für Rohrverschraubungen 8°30' aus
Titanlegierung, zur Verwendung in der Luft- und Raumfahrt fest, die für Reparaturzwecke zum Austausch gegen
Verschraubungen nach EN 4233 zu verwenden sind.
Nenndruck: bis 28 000 kPa
Temperaturbereich: 55 °C bis 135 °C
Série aérospatiale - Systeme de raccordement 8°30' en alliage de titane - Raccords droits, a souder filetés pour réparation
La présente norme spécifie les caractéristiques des raccords droits, à souder, filetés, pour les systèmes de raccordement
8°30', en alliage de titane, pour applications aérospatiales, à utiliser comme éléments de réparation en remplacement de
EN 4233.
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, welded end threaded for repair
General Information
Relations
Overview
EN 3084:2001 is a CEN/AECMA aerospace standard that defines pipe coupling 8°30' unions in titanium alloy intended specifically as welded-end, threaded repair couplings for aerospace fluid systems. The standard replaces EN 4233 and sets out the dimensional, material and marking requirements for couplings rated to a nominal pressure up to 28 000 kPa and a temperature range of 55 °C to 135 °C. EN 3084:2001 targets consistent, interchangeable repair fittings for critical aircraft tubing systems.
Key topics and technical requirements
- Configuration & dimensions: Detailed geometry, mass and dimensional data are given (figures 1 & 2, table 1). Unspecified dimensions may be chosen by the manufacturer provided EN 3275 type II qualification and acceptance are met.
- Thread form: MJ thread limits and dimensions reference ISO 5855-3 for fittings used in aerospace fluid systems.
- Materials: Acceptable titanium alloys are those specified by EN 3311 and EN 3314 (bar stock conditions referenced).
- Surface treatment and lubrication:
- Welded end with no surface treatment for a minimum of 10 mm (external and bore).
- Thread and sealing face must be lubricated per EN 2491 after non-metallic abrasive blasting.
- Lubricant film thickness: 0.005 mm to 0.013 mm.
- Surface roughness: Requirements referenced to the standard’s figures unless otherwise specified in design documentation.
- Marking & designation: Marking requirements follow EN 2424 (style A) and include identification areas shown in the figures.
- Technical specification & acceptance: Qualification and acceptance testing follow EN 3275, type II.
Practical applications and users
EN 3084:2001 is used to ensure safe, repeatable repairs and replacement of pipe couplings in aerospace hydraulic and fluid systems. Typical users:
- Aerospace OEMs and component manufacturers specifying repair fittings
- MRO (maintenance, repair, overhaul) organizations performing in-service pipe repairs
- Design and stress engineers validating tubing repairs and replacements
- Quality, procurement and regulatory teams ensuring interchangeability and traceability
- Suppliers of titanium pipe fittings and precision machined aerospace parts
Benefits include improved interchangeability, traceable marking, and material and surface control to maintain fluid-system integrity under high pressure and operational temperature conditions.
Related standards
- ISO 5855-3 (MJ threads - limit dimensions)
- EN 4233 (standard replaced by EN 3084)
- EN 2656 (coupling ends geometry)
- EN 3274 / EN 3275 (geometric configuration & technical specification)
- EN 3311 / EN 3314 (titanium alloy material grades)
- EN 2491 (molybdenum disulphide dry lubricants)
- EN 2424 (marking of aerospace products)
Keywords: EN 3084:2001, pipe coupling 8°30', titanium alloy, welded end threaded unions, aerospace repair couplings, nominal pressure 28000 kPa, MJ thread.
Frequently Asked Questions
SIST EN 3084:2002 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Pipe coupling 8°30' in titanium alloy - Unions, welded end threaded for repair". This standard covers: This standard specifies the characteristics of unions, welded end, threaded, for pipe couplings 8°30', in titanium alloy, for aerospace applications to be used as repair couplings to replace EN 4233. Nominal pressure: up to 28 000 kPa Temperature range: 55 °C to 135 °C
This standard specifies the characteristics of unions, welded end, threaded, for pipe couplings 8°30', in titanium alloy, for aerospace applications to be used as repair couplings to replace EN 4233. Nominal pressure: up to 28 000 kPa Temperature range: 55 °C to 135 °C
SIST EN 3084:2002 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.
SIST EN 3084:2002 has the following relationships with other standards: It is inter standard links to SIST EN 3084:2002/AC:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN 3084:2002 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
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, welded end threaded for repairLuft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Gerade Erschraubungenmit Anschweißende für ReparaturSérie aérospatiale - Systeme de raccordement 8°30' en alliage de titane - Raccords droits, a souder filetés pour réparationAerospace series - Pipe coupling 8°30' in titanium alloy - Unions, welded end threaded for repair49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 3084:2001SIST EN 3084:2002en01-januar-2002SIST EN 3084:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3084September 2001ICS 49.080English versionAerospace series - Pipe coupling 8°30' in titanium alloy -Unions, welded end threaded for repairSérie aérospatiale - Système de raccordement 8°30' enalliage de titane - Raccords droits, à souder filetés pourréparationLuft- und Raumfahrt - Rohrverschraubung 8°30' ausTitanlegierung - Gerade Verschraubungen 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 3084:2001 ESIST EN 3084:2002
ScopeThis standard specifies the characteristics of unions, welded end, threaded, for pipe couplings 8°30', in titanium alloy, foraerospace applications to be used as repair couplings to replace EN 4233.Nominal pressure: up to 28 000 kPaTemperature range:
55 °C to 135 °C2
Normative referencesThis European Standard incorporates by dated or unda
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