SIST EN 4023:2014

Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°

This standard specifies the characteristics of elbows 45°, 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 45°

Diese Norm legt die Eigenschaften von Winkelverschraubungen 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°

Aeronavtika - Cevni priključek 8°30' iz titanove zlitine - Kotni cevni priključek 45°

General Information

• Status: Published
• Publication Date: 09-Mar-2014
• ICS: 49.025.30 - Titanium
• ICS: 49.080 - Aerospace fluid systems and components
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Feb-2014
• Due Date: 17-Apr-2014
• Completion Date: 10-Mar-2014
• Ref Project: EN 4023:2010 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°

Relations

• Replaces: SIST EN 4023:2004 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°
• Effective Date: 01-Apr-2014

Overview

SIST EN 4023:2014 is a European standard that specifies the technical requirements for 45° elbows used in aerospace series pipe couplings with an 8°30' angle, manufactured from titanium alloy. This standard is crucial for aerospace applications where high reliability, pressure resistance, and temperature tolerance are essential. The standard covers elbows designed to operate at nominal pressures up to 28,000 kPa and temperatures ranging from -55 °C to 135 °C. It ensures high performance in demanding aerospace fluid systems, contributing to safety and efficiency.

Key Topics

• Applicability: Defines characteristics for 45° elbows in pipe couplings featuring an 8°30' design angle, made specifically of titanium alloy for aerospace uses.
• Pressure and Temperature Ratings: Elbows are rated for pressures up to 28,000 kPa and can withstand temperatures from -55 °C to 135 °C, ensuring robust performance in extreme environments.
• Materials: Specifies the use of titanium alloys in accordance with standards EN 3311, EN 3312, EN 3314, and EN 3315, with particular focus on grades and heat treatments suitable for aerospace use.
• Dimensions and Design: Provides detailed dimensions, thread specifications, and mass for each elbow size according to metric standards and ISO 5855-3 thread limits.
• Surface Treatment and Finishing:
  • Lubrication with molybdenum disulphide dry lubricants per EN 2491 standards on threads and sealing faces.
  • Abrasive blasting with non-metallic grit prior to lubrication for proper coating adhesion.
  • Internal surface radius between 0.3 mm and 1.0 mm with a surface roughness of 0.8 µm, ensuring fluid dynamic efficiency and joint integrity.
• Marking and Identification: Compliance with EN 2424 for consistent aerospace product marking, facilitating traceability and quality assurance.
• Technical Specifications: Meets EN 3275:2002 Type II requirements for dynamic beam seals in metric series pipe couplings.

Applications

• Aerospace Fluid Systems: Used in high-pressure fuel, hydraulic, and pneumatic lines demanding lightweight yet durable components.
• Aircraft Engineering: Suitable for structural and auxiliary systems where titanium’s high strength-to-weight ratio and corrosion resistance offer extended lifespan.
• Spacecraft and Defense: Ideal for harsh environments, including extreme temperature fluctuations and high mechanical stresses common in aviation and space exploration.
• Maintenance and Replacement: Facilitates standardized parts management for aerospace maintenance operations ensuring interchangeability and compliance with international norms.

Related Standards

• EN 3274:2010: Specifies geometric configuration for thread ends in pipe couplings, complementing elbows compliance.
• EN 3275:2002: Covers technical specifications and sealing performance of pipe couplings related to EN 4023 elbows.
• EN 2491: Details coating methods for molybdenum disulphide dry lubricants on aerospace parts.
• EN 2424: Governs marking requirements for aerospace products, enhancing component traceability.
• EN 3311 to EN 3315: Define titanium alloy materials including various grades, heat treatments, and forms suited for aerospace manufacturing.

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Keywords: SIST EN 4023:2014, aerospace pipe fittings, titanium alloy elbows, 45° elbows, 8°30' pipe coupling, aerospace fluid systems, titanium pipe fittings, aerospace standards, high-pressure titanium elbows, aerospace temperature resistance.

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 45°Série aérospatiale - Système de raccordement 8°30' en alliage de titane - Raccords coudés à 45°Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°49.080Aerospace fluid systems and components49.025.30TitanTitaniumICS:Ta slovenski standard je istoveten z:EN 4023:2010SIST EN 4023:2014en,fr,de01-april-2014SIST EN 4023:2014SLOVENSKI
STANDARDSIST EN 4023:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4023
October 2010 ICS 49.080 Supersedes EN 4023:2001English Version
Aerospace series - Pipe coupling 8°30' in titanium alloy - Elbows 45°
Série aérospatiale - Système de raccordement 8°30' en alliage de titane - Raccords coudés à 45°
Luft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - Winkelverschraubungen 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.
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