EN 4025:2010
(Main)Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°, bulkhead
Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°, bulkhead
This standard specifies the characteristics of elbows 45°, bulkhead, 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 - Winkel-Schottverschraubungen 45°
Diese Norm legt die Eigenschaften von Winkel-Schottverschraubungen 45°, 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 45° pour traversée de cloison
Aeronavtika - Cevni priključek 8° 30' iz titanove zlitine - Kotni cevni priključek 45° s pregrado
Ta standard določa značilnosti kotnih cevnih priključkov 45° s pregrado iz titanove zlitine za aeronavtično uporabo. Nazivni tlak: do 28,000 kPa. Temperaturni razpon: od –55 °C do 135 °C.
General Information
Relations
Overview
EN 4025:2010 is a European standard developed by CEN that defines the specifications for 45° bulkhead elbows used in pipe couplings with an 8°30' angle, manufactured from titanium alloy. This standard is specifically tailored for aerospace applications, ensuring high reliability and performance under demanding conditions. The elbows are designed for use in fluid systems subject to nominal pressures up to 28,000 kPa and operating temperatures ranging from -55 °C to 135 °C.
The document ensures consistent quality, compatibility, and safety for aerospace fluid systems by outlining dimensional, material, surface treatment, and marking requirements. It is vital for manufacturers, quality assurance engineers, and designers involved in aerospace piping and fluid system components.
Key Topics
Material Specifications
The elbows must be made from titanium alloys conforming to aerospace-grade standards (EN 3311, EN 3312, EN 3314, EN 3315). These alloys provide high strength-to-weight ratio and corrosion resistance crucial for aerospace environments.Dimensional and Mechanical Characteristics
Precise dimensions and tolerances are specified to ensure proper fitting, sealing, and performance. This includes thread configuration according to ISO 5855-3, internal radius finishing between 0.3 mm and 1.0 mm, and surface roughness requirements for sealing faces and threads.Surface Treatment and Lubrication
Threads and sealing surfaces are to be lubricated following EN 2491 standards with molybdenum disulphide dry lubricants, applied on abrasive blasted surfaces to achieve optimal sealing and wear resistance.Marking and Identification
Markings comply with EN 2424:2008 (style A) ensuring traceability and compliance. Each elbow is marked with the standard number, code designation, and manufacturing details.Installation Guidelines
Installation requires adherence to recommended dimensions for bulkhead thickness and washer types (EN 3267). Proper thread engagement and sealing configurations optimize system integrity.
Applications
EN 4025:2010 elbows are primarily used in:
- Aerospace fluid systems - vital for fuel, hydraulic, and pneumatic piping, where reliability under high pressure and temperature variations is critical.
- Bulkhead penetrations - facilitating secure pipe coupling through aircraft fuselage walls and partitions with 45° angled elbows.
- High-performance aerospace components - benefiting from titanium alloy’s lightweight and corrosion-resistant properties, these elbows contribute to overall weight reduction and durability in aircraft and spacecraft assemblies.
This standard supports aerospace manufacturers in designing fluid systems that meet stringent safety and performance criteria while maintaining interchangeability between suppliers and operators.
Related Standards
For comprehensive system integration and compliance, EN 4025:2010 reference standards include:
- EN 3275:2002 - Pipe coupling 8°30' with dynamic beam seal specifications.
- EN 3274:2010 - Pipe coupling 8°30' thread end geometric configurations.
- EN 2424:2008 - Marking of aerospace products.
- EN 2491 - Coating methods for molybdenum disulphide dry lubricants.
- EN 3267 - Washers for bulkhead applications in titanium alloy.
- ISO 5855-3 - MJ thread limits for fluid system fittings.
These linked standards ensure that the complete fluid piping assembly meets the strict aerospace industry requirements for durability, safety, and performance.
Keywords: EN 4025:2010, aerospace pipe coupling, titanium alloy elbows, 45 degrees bulkhead elbow, aerospace fluid system components, high-pressure pipe fittings, titanium aerospace fittings, aerospace standards, aircraft fluid system, pipe coupling 8°30', aerospace pipe elbow standard.
Frequently Asked Questions
EN 4025:2010 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°, bulkhead". This standard covers: This standard specifies the characteristics of elbows 45°, bulkhead, 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.
This standard specifies the characteristics of elbows 45°, bulkhead, 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.
EN 4025:2010 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.
EN 4025:2010 has the following relationships with other standards: It is inter standard links to EN 4025:2001. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 4025:2010 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 CEN standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SUHJUDGRLuft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Winkel-Schottverschraubungen 45°Série aérospatiale - Système de raccordement 8°30' en alliage de titane - Raccords coudés à 45° pour traversée de cloisonAerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°, bulkhead49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 4025:2010SIST EN 4025:2012en,de01-januar-2012SIST EN 4025:2012SLOVENSKI
STANDARDSIST EN 4025:20041DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4025
October 2010 ICS 49.080 Supersedes EN 4025:2001English Version
Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°, bulkhead
Série aérospatiale - Système de raccordement 8°30' en alliage de titane - Raccords coudés à 45° pour traversée de cloison
Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Winkel-Schottverschraubungen 45° This European Standard was approved by CEN on 2 July 2010.
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, Croatia, 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 © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4025:2010: ESIST EN 4025:2012
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