EN 3853:2002

Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy TI-P64001 - Straight unions, threaded

This standard specifies the characteristics of threaded straight unions for pipe couplings, 60° spherical, in TI-P64001, for aerospace applications.
NOTE  Assembly in accordance with TR 4052, port connection prEN 4051

Luft- und Raumfahrt - Rohrverschraubungen mit Kugelbuchsen, 60° , aus Titanlegierung TI-P64001 - Gerade Einschraubverschraubungen

Diese Norm legt die Eigenschaften von geraden Einschraubverschraubungen für Rohrverschraubungen 60° mit Kugelbuchse, aus TI P64001, für Anwendungen in der Luft- und Raumfahrt fest.
ANMERKUNG   Montage nach TR 4052, Einschraublöcher nach EN 4051.

Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy TI-P64001 - Straight unions, threaded

General Information

• Status: Published
• Publication Date: 12-Nov-2002
• Withdrawal Date: 30-May-2003
• ICS: 49.080 - Aerospace fluid systems and components
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3 - Mechanical
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 30-Jun-2017
• Completion Date: 11-Feb-2026
• Ref Project: SIST EN 3853:2004 - Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy TI-P64001 - Straight unions, threaded

Relations

• Refers: prEN 415-2 - Packaging machines safety - Part 2: Pre-formed rigid container packaging machines
• Effective Date: 28-Jan-2026
• Refers: EN 4051:2002 - Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy - Port connection
• Effective Date: 28-Jan-2026
• Refers: EN 9100:2018 - Quality Management Systems - Requirements for Aviation, Space and Defence Organizations
• Effective Date: 28-Jan-2026
• Refers: EN 1715-1:1997 - Aluminium and aluminium alloys - Drawing stock - Part 1: General requirements and technical conditions for inspection and delivery
• Effective Date: 28-Jan-2026
• Refers: EN 2491:2011 - Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
• Effective Date: 28-Jan-2026
• Refers: EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026
• Refers: EN 9133:2018 - Aerospace series - Quality Management Systems - Qualification Procedure for Aerospace Standard Products
• Effective Date: 28-Jan-2026
• Referred By: EN 3855:2002 - Aerospace series - Pipe couplings, 60°, spherical in titanium alloy TI-P64001 - Caps
• Effective Date: 28-Jan-2026

Overview

EN 3853:2002 is a European Standard developed by CEN, specifying the requirements for 60° spherical, threaded straight unions made from titanium alloy TI-P64001, designed for aerospace pipe couplings. This standard details essential characteristics such as configuration, dimensions, tolerances, material properties, and surface coating, ensuring high reliability and compatibility in aerospace fluid systems. These pipe couplings are engineered for critical aerospace applications, where performance and safety are paramount.

Key Topics

• Material Specification: EN 3853:2002 applies specifically to straight unions manufactured from titanium alloy TI-P64001, known for its strength-to-weight ratio and corrosion resistance, which is crucial in demanding aerospace environments.
• Threaded Spherical Couplings: The standard covers threaded straight unions with a 60° spherical design, supporting secure and leak-resistant pipe connections in fluid systems.
• Dimensions and Tolerances: It defines strict requirements for dimensions and tolerances, adhering to industry standards such as ISO 286-2 (system of limits and fits) and ISO 5855-3 (aerospace MJ thread standards) to ensure interchangeability and fit.
• Surface Coating: Requirements for protective coatings, as specified in EN 2491 (molybdenum disulphide dry lubricants), are included to optimize durability and reduce wear.
• Quality Assurance and Marking: Covers marking methods (EN 2424) and mandates compliance with aerospace quality management standards (EN 2000) for traceability and consistent product quality.
• Assembly and Compatibility: Integration and assembly are based on TR 4052 (assembly recommendations) and port connections according to EN 4051, promoting seamless installation within aerospace fluid systems.

Applications

• Aerospace Fluid Systems: These threaded straight unions are primarily used in high-performance aerospace fluid systems for both military and commercial aircraft. Their robust design supports reliable operation in hydraulic and fuel lines.
• Critical Environments: The titanium alloy construction makes these unions suitable for applications exposed to high stress, vibration, and extreme temperatures, promoting long-term reliability in flight-critical systems.
• Maintenance and Upgrades: Standardization of dimensions and tolerances allows for easy maintenance, replacement, and system upgrades across a variety of aircraft platforms and subsystems.
• OEM and Supply Chain: Aerospace manufacturers and suppliers benefit from using EN 3853-compliant components due to their recognized quality assurance protocols, making certification and auditing processes more streamlined.

Related Standards

When implementing or specifying EN 3853:2002, it is essential to consider the following closely associated standards:

• EN 2530 – Titanium alloy TI-P63 material requirements
• EN 2000 – Aerospace product quality assurance for manufacturers
• EN 2424 – Marking of aerospace products
• EN 2491 – Surface coatings with molybdenum disulphide
• ISO 286-2 – Limits and fits for holes and shafts
• ISO 5855-3 – Aerospace MJ threads for fluid fittings
• EN 4051 – Port connections for 60° spherical pipe couplings in titanium alloy
• TR 4052 – Assembly recommendations for titanium spherical couplings

EN 3853:2002 provides a robust framework for the standardization of titanium spherical pipe couplings in the aerospace industry, ensuring interoperability, enhanced safety, and superior performance in critical fluid systems. By adhering to this standard, organizations contribute to the reliability and efficiency of aerospace manufacturing and maintenance operations.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy TI-P64001 - Straight unions, threadedLuft- und Raumfahrt - Rohrverschraubungen mit Kugelbuchsen, 60° , aus Titanlegierung TI-P64001 - Gerade EinschraubverschraubungenAerospace series - Pipe couplings, 60°, spherical, in titanium alloy TI-P64001 - Straight unions, threaded49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 3853:2002SIST EN 3853:2004en01-maj-2004SIST EN 3853:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3853November 2002ICS 49.080English versionAerospace series - Pipe couplings, 60°, spherical, in titaniumalloy TI-P64001 - Straight unions, threadedSérie aérospatiale - Raccords sphériques, 60°, en alliagede titane TI-P64001 - Raccords droits, filetésThis European Standard was approved by CEN on 30 August 2002.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, Malta, 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© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3853:2002 ESIST EN 3853:2004
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