EN 3264:2018

Aerospace series - Pipe coupling 8°30' in titanium alloy - Thrust wire nuts

This document specifies the characteristics of thrust wire nuts 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 - Muttern mit Schubdraht

Diese Europäische Norm legt die Eigenschaften von Muttern mit Schubdraht 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 - Écrous à jonc

Cette Norme européenne spécifie les caractéristiques requises des écrous à jonc pour les systèmes de raccordement 8°30', en alliage de titane, pour applications aérospatiales.
Pression nominale : jusqu'à 28 000 kPa
Plage de températures : – 55 °C à 135 °C

Aeronavtika - Cevni priključek 8°30' iz titanove zlitine - Matice s potisno žico

Ta dokument določa lastnosti matic s potisno žico za cevne priključke 8°30’ iz titanove
zlitine za uporabo v aeronavtiki.
Nazivni tlak: do 28.000 kPa.
Temperaturno območje: od −55 °C do 135 °C

General Information

• Status: Published
• Publication Date: 19-Jun-2018
• Withdrawal Date: 30-Dec-2018
• ICS: 49.080 - Aerospace fluid systems and components
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3/S 3 - Hydraulics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 20-Jun-2018
• Completion Date: 20-Jun-2018
• Ref Project: SIST EN 3264:2018 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Thrust wire nuts

Relations

• Replaces: EN 3264:2010 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Thrust wire nuts
• Effective Date: 27-Jun-2018

Overview

EN 3264:2018 is a European standard developed by the Aerospace and Defence Industries Association of Europe (ASD-STAN) and published by CEN. It specifies the detailed characteristics, dimensions, and technical requirements for thrust wire nuts used in pipe couplings with an 8°30' angle, manufactured from titanium alloy, specifically for aerospace applications. This standard addresses critical components designed to operate under nominal pressures up to 28,000 kPa and in temperature ranges between −55 °C and 135 °C, guaranteeing high-performance reliability under extreme aerospace conditions.

Key Topics

• Scope and Application
  Defines thrust wire nuts used in titanium alloy pipe couplings (8°30' angle), focusing on aerospace industry needs where strength, corrosion resistance, and lightweight materials are essential.

• Material Specifications
  Titanium alloys must comply with EN 3311 or EN 3314 standards, ensuring the correct alloy composition, treatment, and mechanical properties suitable for aerospace environments.

• Dimensional and Geometrical Requirements
  Detailed size and tolerance specifications are provided in tables and figures complying with ISO and EN standards such as ISO 5855-3 and ISO 8788 to maintain interchangeability and performance consistency.

• Surface Treatment and Lubrication
  Surface roughness and lubrication requirements include abrasive blasting with non-metallic grit and molybdenum disulphide dry lubricants as per EN 2491, applied exclusively in the groove area for optimal friction performance and durability.

• Marking and Traceability
  Marking must align with aerospace marking standards EN 2424 for traceability, quality control, and certification purposes.

• Qualification and Testing
  Product qualification procedures follow EN 9133, ensuring compliance through rigorous quality management and product testing consistent with aerospace industry expectations.

Applications

EN 3264:2018 thrust wire nuts are essential components in aerospace fluid systems, including hydraulic, fuel, and pneumatic piping assemblies where secure and leak-proof pipe couplings are critical. These nuts enable the reliable clamping of titanium alloy pipes with the 8°30' coupling design, widely used in aircraft and spacecraft systems due to their:

• High Strength-to-Weight Ratio
  Utilization of titanium alloys reduces overall weight without compromising mechanical strength, which is vital for aerospace fuel efficiency and performance.

• Corrosion Resistance
  Titanium alloy thrust wire nuts withstand harsh environmental conditions, including exposure to extreme temperatures and corrosive fluids.

• Operational Reliability Under High Pressure
  Suitable for applications requiring nominal pressures up to 28,000 kPa, making them ideal for high-pressure aerospace fluid systems.

• Wide Temperature Range Compatibility
  Designed to perform effectively in operating environments from −55 °C to 135 °C, covering most aerospace climate scenarios.

Related Standards

To ensure full compliance and integration into aerospace piping systems, EN 3264:2018 references and is supported by several related standards:

• EN 4032 – Aerospace series - Pipe coupling 8°30' in titanium alloy - Thrust wires
• EN 3275 – Aerospace series - Pipe coupling up to 28,000 kPa - Dynamic beam seal - Technical specifications
• EN 2424 – Aerospace series - Marking of aerospace products
• EN 2491 – Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
• EN 3311 & EN 3314 – Aerospace series - Titanium alloy bar specifications for machining
• EN 9133 – Aerospace series - Quality management systems - Qualification procedures for aerospace standard products
• ISO 5855-3 – Aerospace - MJ threads - Limit dimensions for fluid system fittings
• ISO 8788 – Aerospace - Nuts, metric - Tolerances of form and position
• EN ISO 286-2 – Geometrical product specifications - Tolerances on linear sizes

Summary

EN 3264:2018 provides a comprehensive framework for the design, manufacture, and qualification of thrust wire nuts for titanium alloy pipe couplings in aerospace applications. By specifying precise materials, dimensions, surface treatments, and quality assurance protocols, this standard supports the aerospace industry’s demand for reliable, lightweight, and durable pipe coupling components operating under extreme pressure and temperature conditions. Manufacturers, engineers, and quality assurance professionals working with aerospace fluid systems will find EN 3264:2018 essential for ensuring product consistency, safety, and regulatory compliance.

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 - Muttern mit SchubdrahtSérie aérospatiale - Système de raccordement 8°30' en alliage de titane - Écrous à joncAerospace series - Pipe coupling 8°30' in titanium alloy - Thrust wire nuts49.030.30MaticeNuts49.025.30TitanTitaniumICS:Ta slovenski standard je istoveten z:EN 3264:2018SIST EN 3264:2018en,fr,de01-oktober-2018SIST EN 3264:2018SLOVENSKI
STANDARDSIST EN 3264:20101DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3264
June
t r s z ICS
v {ä r z r Supersedes EN
u t x vã t r s rEnglish Version
Aerospace series æ Pipe coupling
z ¹ u r 5 in titanium alloy æ Thrust wire nuts Série aérospatiale æ Système de raccordement
z ¹ u r 5 en alliage de titane æ Écrous à jonc
Luftæ und Raumfahrt æ Rohrverschraubung
z ¹ u r 5 aus Titanlegierung æ Muttern mit Schubdraht This European Standard was approved by CEN on
s w October
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
u t x vã t r s z ESIST EN 3264:2018
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