SIST EN 4026:2002

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

This standard specifies the characteristics of tees, 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 - T-Verschraubungen

Diese Norm legt die Eigenschaften von T-Verschraubungen, 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 - Systeme de raccordement 8°30' en alliage de titane - Raccords en té

La présente norme spécifie les caractéristiques des raccords en té pour les systèmes de raccordement 8°30', en alliage
de titane, pour applications aérospatiales.
Pression nominale: jusqu'à 28 000 kPa
Plage de température:   55 °C à 135 °C

Aerospace series - Pipe coupling 8-30' in titanium alloy - Tees

General Information

• Status: Published
• Publication Date: 31-Dec-2001
• ICS: 49.080 - Aerospace fluid systems and components
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2002
• Due Date: 01-Jan-2002
• Completion Date: 01-Jan-2002
• Ref Project: EN 4026:2001 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees

Overview

EN 4026:2001 (Aerospace series) defines the characteristics of tees for 8°30' pipe couplings in titanium alloy intended for aerospace fluid systems. The standard is published by CEN and applies to tees designed for a nominal pressure up to 28 000 kPa and a temperature range of 55 °C to 135 °C. It specifies geometry, materials, surface finishing, lubrication and marking requirements to ensure interchangeability and reliable performance in aerospace applications.

Key topics and requirements

• Scope and limits
  • Tees for pipe coupling 8°30' in titanium alloy for aerospace use.
  • Rated up to 28 000 kPa; temperature range given as 55 °C to 135 °C.
• Configuration, dimensions and mass
  • Detailed dimensional data and mass values are given (table and figure in the standard); values apply before lubricating.
  • Unspecified dimensions may be chosen by the manufacturer provided EN 3275 (type II) qualification/acceptance requirements are met.
• Threads and sealing
  • Uses MJ thread series; limits and thread dimensions referenced to ISO 5855‑3.
  • Dynamic beam seal specification referenced to EN 3275.
• Materials
  • Titanium alloy grades and product forms are referenced to EN 3311 / EN 3312 / EN 3314 / EN 3315 (TI‑P64001 variants).
• Surface treatment and lubrication
  • Thread and sealing faces to be lubricated per EN 2491.
  • Abrasive blasting with non‑metallic grit required prior to lubrication.
  • Lubricant film thickness: 0.005 mm to 0.013 mm.
• Internal finishing and surface quality
  • Internal radius R = 0.3 mm to 1.0 mm; internal surface roughness 0.8 µm.
  • Hand deburring is explicitly prohibited.
• Marking
  • Marking to follow EN 2424 (style A) and accompanying figure.

Applications and users

• Typical users: aerospace OEMs, fluid‑system designers, component manufacturers, quality and procurement engineers, maintenance organizations, and certification bodies.
• Practical applications: design, manufacture, procurement and inspection of titanium tees used in aerospace fluid systems where weight, corrosion resistance and strength are critical-ensuring compatibility with 8°30' pipe coupling systems and MJ threads.

Related standards

• ISO 5855‑3 (MJ threads)
• EN 3274 / EN 3275 (8°30' coupling geometry and dynamic seal)
• EN 2424 (marking)
• EN 2491 (molybdenum disulfide dry lubricant)
• EN 3311 / EN 3312 / EN 3314 / EN 3315 (titanium alloy material specifications)

EN 4026:2001 provides the prescriptive requirements needed to achieve interchangeability, traceability and performance for titanium alloy tees in aerospace pipe coupling 8°30' systems.

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 - TeesLuft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - T-VerschraubungenSérie aérospatiale - Systeme de raccordement 8°30' en alliage de titane - Raccords en téAerospace series - Pipe coupling 8°30' in titanium alloy - Tees49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 4026:2001SIST EN 4026:2002en01-januar-2002SIST EN 4026:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4026September 2001ICS 49.080English versionAerospace series - Pipe coupling 8°30' in titanium alloy - TeesSérie aérospatiale - Système de raccordement 8°30' enalliage de titane - Raccords en téLuft- und Raumfahrt - Rohrverschraubung 8°30' ausTitanlegierung - T-VerschraubungenThis European Standard was approved by CEN on 29 December 2000.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 4026:2001 ESIST EN 4026:2002

ScopeThis standard specifies the characteristics of tees, for pipe couplings 8°30', in titanium alloy, fo
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