EN 4020:2009

Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 90°, welded end with thrust wire nut

This standard specifies the characteristics of elbows 90°, welded end, with thrust wire nut, 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 - Winkelverschraubungen 90° mit Anschweißende, mit Mutter mit Schubdraht

Diese Norm legt die Eigenschaften von Winkelverschraubungen 90° mit Anschweißende mit Mutter 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 - Raccords coudés à 90° à souder, avec écrou à jonc

Aeronavtika - Cevni priključek 8°30' iz titanove zlitine - Kotni cevni priključek 90° z zavarjenim koncem in matico s potisno žico

General Information

• Status: Published
• Publication Date: 30-Jun-2009
• Withdrawal Date: 30-Jan-2010
• 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: 21-Jan-2025
• Completion Date: 11-Feb-2026
• Ref Project: SIST EN 4020:2009 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 90°, welded end with thrust wire nut

Relations

• Replaces: EN 4020:2001 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 90°, welded end with thrust wire nut
• Effective Date: 22-Dec-2008
• Refers: EN 4032:2001 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Thrust wire
• Effective Date: 28-Jan-2026
• Refers: EN 3264:2018 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Thrust wire nuts
• Effective Date: 28-Jan-2026
• Refers: EN 2656:2001 - Aerospace series - Pipe coupling - Coupling end, welded - Geometric configuration
• Effective Date: 28-Jan-2026
• Refers: EN 2491:2011 - Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
• Effective Date: 28-Jan-2026
• Refers: EN 3275:2019 - Aerospace series - Pipe coupling 8°30' up to 28 000 kPa Dynamic beam seal - Metric series - Technical specification
• 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
• Refers: EN 9133:2018 - Aerospace series - Quality Management Systems - Qualification Procedure for Aerospace Standard Products
• Effective Date: 28-Jan-2026
• Refers: EN 3312:2012 - Aerospace series - Titanium alloy Ti-6Al-4V - Annealed - Forgings De ≤ 150 mm
• 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 3273:2001 - Aerospace series - Pipe coupling 8°30' - Dynamic beam seal end for elbows, tees and crosses - Geometric configuration
• Effective Date: 28-Jan-2026

Overview

EN 4020:2009 is a European standard developed by CEN for the aerospace sector, focusing on 90° elbows with welded ends and a thrust wire nut for pipe couplings at an 8°30' angle, manufactured from titanium alloy. This standard ensures product consistency, safety, and compatibility in demanding aerospace environments. The elbows are designed for fluid systems operating at nominal pressures up to 28,000 kPa and within a temperature range of -55 °C to 135 °C, meeting the rigorous requirements of aerospace applications.

Key Topics

• Product Characteristics: Specifies physical configuration, dimensions, mass, and required surface conditions, including roughness and surface finishing.
• Materials: Elbows are produced from approved titanium alloys, enhancing corrosion resistance, strength-to-weight ratio, and durability under extreme conditions.
• Surface Treatment: Details on lubrication, abrasive blasting, and treatment processes to optimize contact surfaces and ensure long-term performance.
• Quality Assurance: Mandates adherence to quality management and qualification processes for aerospace parts in accordance with leading industry practices.
• Marking and Identification: Clear rules for marking products using standardized methods, supporting traceability and maintenance practices in aerospace operations.
• Compatibility: Ensures joints are compatible with aerospace series pipe couplings, thrust wire nuts, and system dimensions, contributing to leak-free, secure fluid connections.

Applications

EN 4020:2009 elbows are essential in aerospace hydraulic and fuel systems, offering reliable pipe coupling solutions for aircraft and spacecraft. Key applications include:

• Hydraulic Systems: Used in high-pressure hydraulic lines where weight savings and resistance to aggressive environments are critical.
• Fuel and Fluid Lines: Suitable for jet fuel or other aerospace fluids, ensuring integrity and operational safety at high pressures and variable temperatures.
• Maintenance and Repair Operations (MRO): Standardization simplifies procurement and replacement, enhancing operational efficiency and reducing downtime.
• New Aircraft Design: Engineers use components conforming to EN 4020:2009 to ensure compatibility and certification compliance during development.

Adopting elbows manufactured to this standard supports industry best practices in quality, longevity, and system compatibility, reducing the risk of fluid leaks and ensuring reliability in harsh aerospace conditions.

Related Standards

The following standards are commonly referenced alongside EN 4020:2009 for aerospace fluid systems:

• EN 2424: Marking of aerospace products
• EN 2491: Molybdenum disulphide dry lubricants - Coating methods
• EN 2656: Pipe coupling - Coupling end, welded - Geometric configuration
• EN 3264: Pipe coupling 8°30' in titanium alloy - Thrust wire nuts
• EN 3273: Pipe coupling 8°30' - Dynamic beam seal end for elbows, tees, and crosses
• EN 3275: Pipe coupling 8°30' up to 28 000 kPa - Dynamic beam seal - Metric series - Technical specification
• EN 4032: Pipe coupling 8°30' in titanium alloy - Thrust wire
• EN 9133: Quality management systems - Qualification procedure for aerospace standard parts
• ISO 5855-3: MJ threads - Limit dimensions for fittings for fluid systems

Implementing EN 4020:2009, together with its related standards, enables aerospace manufacturers and MRO organizations to achieve high standards of safety, interoperability, and performance in fluid management systems.

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 - Winkelverschraubungen 90° mit Anschweißende, mit Mutter mit SchubdrahtSérie aérospatiale - Système de raccordement 8°30' en alliage de titane - Raccords coudés à 90° à souder, avec écrou à joncAerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 90°,
welded end with thrust wire nut49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 4020:2009SIST EN 4020:2009en01-september-2009SIST EN 4020:2009SLOVENSKI
STANDARDSIST EN 4020:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4020
July 2009 ICS 49.080 Supersedes EN 4020:2001 English Version
Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 90°,
welded end with thrust wire nut
Série aérospatiale - Système de raccordement 8°30' en alliage de titane - Raccords coudés à 90° à souder, avec écrou à jonc
Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Winkelverschraubungen 90° mit Anschweißende, mit Mutter mit Schubdraht This European Standard was approved by CEN on 12 March 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN 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 translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4020:2009: ESIST EN 4020:2009
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