EN 3566:2001

Aerospace series - Pipe coupling 8°30' in titanium alloy - Adaptors with lockring

This standard specifies the characteristics for adaptors, with lockring, for pipe couplings 8°30', in titanium alloy, for installing in a boss 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 - Anschlußverschraubungen mit Sicherungsring

Série aérospatiale - Système de raccordement 8°30' en alliage de titane - Raccords à planter à bague de sécurité

Aerospace series - Pipe coupling 8°30' in titanium alloy - Adaptors with lockring

General Information

• Status: Published
• Publication Date: 23-Oct-2001
• Withdrawal Date: 29-Apr-2002
• 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: 31-May-2017
• Completion Date: 11-Feb-2026
• Ref Project: SIST EN 3566:2004 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Adaptors with lockring

Relations

• Refers: EN 2604:2005 - Aerospace series - 8° 30' interface for adaptors, threaded, with lockring - Geometric configuration
• Effective Date: 28-Jan-2026
• Refers: prEN 415-2 - Packaging machines safety - Part 2: Pre-formed rigid container packaging machines
• Effective Date: 28-Jan-2026
• Refers: EN 3079:2006 - Aerospace series - Pipe coupling 8°30' up to 28 000 kPa - Adaptors - Metric series - Technical specification
• Effective Date: 28-Jan-2026
• Refers: EN 2491:2011 - Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
• Effective Date: 28-Jan-2026
• Refers: EN 2645:2005 - Aerospace series - Lockrings for adaptors, threaded, with lockring - Dimensions
• Effective Date: 28-Jan-2026
• Refers: EN 2602:2005 - Aerospace series - Ports for adaptors, threaded, with lockring - Geometric configuration
• Effective Date: 28-Jan-2026
• Refers: EN 2603:2005 - Aerospace series - Port ends for adaptors, threaded, with lockring - Geometric configuration
• Effective Date: 28-Jan-2026
• Refers: EN 3311:2023 - Aerospace series - Titanium alloy TI-P64001 (Ti-6Al-4V) - Annealed - Bars for machining - D ≤ 300 mm - 900 MPa ≤ Rm ≤ 1 160 MPa
• Effective Date: 28-Jan-2026
• Refers: EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026
• Referred By: EN 2608:2005 - Aerospace series - Installation and removal requirements for 8° 30' adaptors, threaded, with lockring
• Effective Date: 28-Jan-2026
• Corrected By: EN 3566:2001/AC:2003 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Adaptors with lockring
• Effective Date: 22-Dec-2008

Overview

EN 3566:2001 is a European standard developed by CEN for aerospace applications. It specifies the characteristics of adaptors with a lockring design for pipe coupling systems with an 8°30' interface, manufactured from titanium alloy. These adaptors are intended for installation in a boss and are suitable for high-performance aerospace fluid systems. The standard supports operation at nominal pressures up to 28,000 kPa within a temperature range from -55 °C to +135 °C, making it suitable for demanding operational environments encountered in the aerospace industry.

Key Topics

• Lockring Pipe Couplings: Details the use of lockring technology, ensuring secure and reliable connections in aerospace fluid systems.
• Material Requirements: Specifies titanium alloy as the material of construction for adaptors, referencing EN 3311 and EN 3314, which guarantees high strength and corrosion resistance.
• Design Features: Describes dimensional requirements, surface finish, and mass for compatibility with pipe coupling systems featuring an 8°30' interface.
• Performance Specifications: Adaptors must withstand high pressure (up to 28,000 kPa) and a broad temperature range (-55 °C to +135 °C), fulfilling the operational needs of aerospace fluid systems.
• Surface Treatment: Outlines lubrication and anodizing requirements for the adaptor surface, enhancing durability and protecting against friction and wear.
• Marking and Identification: Ensures adaptors are marked according to EN 2424 for traceability in aerospace systems.

Applications

The EN 3566:2001 standard is essential for manufacturers, suppliers, and maintenance engineers working with aerospace fluid systems. It is widely applicable in the following areas:

• Hydraulic and Fuel Systems: Ensures safe, leak-free connections in aircraft hydraulic and fuel management systems, where reliability is critical.
• Aerospace Structure Integration: Used for securely connecting pipes within the structure of commercial and military aircraft, helicopters, satellites, and other aerospace vehicles.
• Component Manufacturing and Repair: Serves as a reference for manufacturing adaptors and for quality assurance during maintenance, repair, and overhaul (MRO) activities.
• System Upgrades and Retrofits: Provides guidance for system upgrades, ensuring compatibility and standardization across newer and legacy aerospace platforms.

Related Standards

To assure full conformity and optimal system performance, EN 3566:2001 references several other vital standards, including:

• ISO 5855-3: Aerospace - MJ threads - Limit dimensions for fittings for fluid systems.
• EN 2424: Marking of aerospace products.
• EN 2491: Molybdenum disulphide dry lubricants - Coating methods.
• EN 2602/EN 2603/EN 2604/EN 2645: Dimensions and specifications for straight unions, ports, and lockrings in aerospace pipe coupling systems.
• EN 3079: Technical specifications for adaptors in metric series.
• EN 3311/EN 3314: Specifications for titanium alloys used in aerospace applications.
• AMS 2488D: Anodic treatment for titanium and titanium alloys.

These related standards ensure that the adaptors operate safely and efficiently within aerospace pipe coupling systems, supporting the consistent use and interchangeability of components across the industry.

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Keywords: EN 3566:2001, aerospace adaptors, titanium alloy, pipe coupling, lockring, high-pressure fittings, fluid systems, European standard, CEN, aerospace fluid systems, aircraft hydraulic connectors, aerospace pipe fittings.

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 - Adaptors with lockringLuft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Anschlußverschraubungen mit SicherungsringSérie aérospatiale - Systeme de raccordement 8°30' en alliage de titane - Raccords a planter a bague de sécuritéAerospace series - Pipe coupling 8°30' in titanium alloy - Adaptors with lockring49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 3566:2001SIST EN 3566:2004en01-maj-2004SIST EN 3566:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3566October 2001ICS 49.080English versionAerospace series - Pipe coupling 8°30' in titanium alloy -Adaptors with lockringSérie aérospatiale - Système de raccordement 8°30' enalliage de titane - Raccords à planter à bague de sécuritéLuft- und Raumfahrt - Rohrverschraubung 8°30' ausTitanlegierung - Anschlußverschraubungen mitSicherungsringThis 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 3566:2001 ESIST EN 3566:2004

+ 135 C2Normative referencesThis European Standard incorporates by dated or undated reference provisions from other publications.These normative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of the
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