Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy - Port connection

This standard specifies the characteristics of port connection for pipe couplings, 60°, spherical, in titanium alloy, for aerospace applications.
It is applicable to 60°Ispherical tube coupling in titanium alloy defined by the EN 3853 standard, to be mounted with O-ring defined in accordance with the TR 4052.

Luft- und Raumfahrt - Rohrverschraubungen mit Kugelbuchsen, 60°, aus Titanlegierung - Einschraublöcher

Diese Norm legt die Eigenschaften von Einschraublöchern für Rohrverschraubungen 60° mit Kugelbuchse, aus Titanlegierung, für Anwendungen in der Luft- und Raumfahrt fest.
Sie ist in Verbindung mit der Rohrverschraubung 60° mit Kugelbuchse aus Titanlegierung nach EN 3853 anzuwenden, die mit dem in TR 4052 festgelegten O-Ring zu montieren ist.

Série aérospatiale - Raccords, sphériques, 60°, en alliage de titane - Logement d'implantation

Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy - Port connection

General Information

Status
Published
Publication Date
30-Apr-2004
ICS
49.080 - Aerospace fluid systems and components
Technical Committee
I08 - Imaginarni 08
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-May-2004
Due Date
01-May-2004
Completion Date
01-May-2004
Ref Project
EN 4051:2002 - Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy - Port connection

Overview

EN 4051:2002 specifies the characteristics of port connections for 60° spherical pipe couplings made from titanium alloy for aerospace applications. It defines the geometric requirements, designation practice and drawing indication rules needed to ensure compatible, interchangeable and leak-tight installations when used with the corresponding tube coupling (EN 3853) and an O-ring per TR 4052.

This standard is part of the aerospace series for fluid systems and components and is intended for designers, manufacturing engineers, quality managers and procurement teams working on aircraft fluid lines and fittings.

Key Topics

  • Scope and applicability: Port connection characteristics for 60° spherical titanium alloy pipe couplings intended for aerospace fluid systems.
  • Dimensional requirements: The standard references drawings (Figure 1) and a table of required dimensions (Table 1) with diameter codes and tolerances; dimensions are given in millimetres.
  • Thread and fitting interface: Interfaces reference MJ thread limits (see ISO 5855-3) and are coordinated with EN 3853 straight unions for the mating coupling.
  • O-ring assembly: Port connections are defined to be mounted with the O-ring specified in TR 4052 to achieve required sealing and performance.
  • Designation and drawing practice: Examples and conventions (e.g., identity block entry such as EN 4051-080) are provided so ports can be fully defined on engineering drawings.

Applications

EN 4051:2002 is intended for use in aerospace fluid systems where lightweight, corrosion-resistant and high-strength connections are required. Typical applications include:

  • Hydraulic and fuel tubing systems on aircraft
  • Pneumatic and control line fittings in aerospace platforms
  • Replacement and retrofit components where interchangeability and standardised port geometry are critical

Benefits of applying this standard:

  • Ensures interchangeability across suppliers and platforms
  • Supports reliable, leak-tight O-ring sealing when installed per TR 4052
  • Reduces design ambiguity through standardised drawing indications and designation rules

Related Standards

The EN 4051:2002 text includes normative references and cross-links that should be used together for complete specification and installation guidance:

  • EN 3853 – 60° spherical tube coupling in titanium alloy (mating component)
  • TR 4052 – Assembly recommendations for 60° spherical titanium couplings (O-ring installation)
  • ISO 5855-3 – MJ threads: limit dimensions for fittings for fluid systems

When implementing EN 4051:2002, consult these related documents to ensure thread compatibility, correct O-ring selection and proper assembly procedures. Following the standard supports safer, repeatable installations across aerospace fluid-system designs.

Frequently Asked Questions

SIST EN 4051:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy - Port connection". This standard covers: This standard specifies the characteristics of port connection for pipe couplings, 60°, spherical, in titanium alloy, for aerospace applications. It is applicable to 60°Ispherical tube coupling in titanium alloy defined by the EN 3853 standard, to be mounted with O-ring defined in accordance with the TR 4052.

This standard specifies the characteristics of port connection for pipe couplings, 60°, spherical, in titanium alloy, for aerospace applications. It is applicable to 60°Ispherical tube coupling in titanium alloy defined by the EN 3853 standard, to be mounted with O-ring defined in accordance with the TR 4052.

SIST EN 4051:2004 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.

You can purchase SIST EN 4051:2004 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 SIST standards.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Pipe couplings, 60°, spherical, in titanium alloy - Port connectionLuft- und Raumfahrt - Rohrverschraubungen mit Kugelbuchsen, 60°, aus Titanlegierung - EinschraublöcherSérie aérospatiale - Raccords, sphériques, 60°, en alliage de titane - Logement d'implantationAerospace series - Pipe couplings, 60°, spherical, in titanium alloy - Port connection49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 4051:2002SIST EN 4051:2004en01-maj-2004SIST EN 4051:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4051November 2002ICS 49.080English versionAerospace series - Pipe couplings, 60°, spherical, in titaniumalloy - Port connectionSérie aérospatiale - Raccords sphériques, 60°, en alliagede titane - Logement d'implantationThis European Standard was approved by CEN on 19 August 2002.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, Malta, 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© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4051:2002 ESIST EN 4051:2004
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