Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced, bulkhead branch, long

This standard specifies the characteristics of tees, reduced, bulkhead branch, long, 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, reduziert, seitlicher Auslass als Schottanschluss, lange Ausführung

Diese Norm legt die Eigenschaften von T-Verschraubungen, reduziert, seitlicher Auslass als Schottanschluss, lang,  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, réduits pour traversée de cloison en pied, type long

La présente norme spécifie les caractéristiques des raccords en té pour traversée de cloison, réduits, en pied, type long,
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, reduced, bulkhead branch, long

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 4191:2001 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced, bulkhead branch, long

Overview

EN 4191:2001 specifies requirements for aerospace series pipe coupling 8°30' in titanium alloy - specifically tees, reduced, bulkhead branch, long. The standard defines geometry, materials, surface treatment, marking and technical acceptance for these specialised pipe fittings used in aerospace fluid systems. It covers components rated to a nominal pressure up to 28 000 kPa and for service temperatures from -55 °C to 135 °C.

Keywords: EN 4191:2001, pipe coupling 8°30', titanium alloy tees, bulkhead branch, aerospace pipe fitting, nominal pressure 28 000 kPa.

Key topics and requirements

  • Configuration & dimensions: Detailed dimensional and mass data are given (figures and tables) for reduced tees and long bulkhead branches. Connection sizing follows MJ thread conventions (ISO 5855-3).
  • Pressure & temperature: Rated for up to 28 000 kPa and service temperatures -55 °C to 135 °C.
  • Materials: Titanium alloy per referenced aerospace material standards (EN 3311 / EN 3312 / EN 3314 / EN 3315), ensuring aerospace-grade mechanical and corrosion properties.
  • Surface treatment & lubrication:
    • Threads and sealing faces lubricated per EN 2491.
    • Prior to lubrication, surfaces must be abrasive-blasted with non‑metallic grit.
    • Lubricant film thickness: 0.005 mm to 0.013 mm.
  • Internal surface finishing: Radius R = 0.3 mm to 1.0 mm, surface roughness 0.8 µm; hand deburring not permitted.
  • Marking & technical specification: Marking follows EN 2424 (style A), and technical acceptance per EN 3275, type II.
  • Installation: Bulkhead installation details and washer interface references provided (see EN 3267). The standard includes examples and a method for determining coupling mass from tabulated values.

Applications and users

Practical uses:

  • High-pressure aerospace fluid systems (fuel, hydraulic and pneumatic line assemblies where titanium alloy fittings are required).
  • Bulkhead penetrations and tee branches in airframe and engine fluid distribution.

Who will use EN 4191:2001:

  • Aerospace design engineers and systems integrators specifying fluid fittings.
  • Component manufacturers and machining shops producing titanium tees and bulkhead branches.
  • Quality assurance, procurement and certification teams verifying compliance with aerospace hardware standards.
  • Maintenance and repair organizations needing replacement parts compliant with original specifications.

Related standards

Normative references and closely related documents cited in EN 4191:2001 include:

  • ISO 5855-3 (MJ threads)
  • EN 2424 (marking)
  • EN 2491 (molybdenum disulphide dry lubricants)
  • EN 3267 (bulkhead washers)
  • EN 3274 / EN 3275 (pipe coupling geometry and technical spec)
  • EN 3311–EN 3315 (titanium alloy material specifications)

EN 4191:2001 is essential when specifying or manufacturing 8°30' titanium alloy tees for aerospace - providing the dimensional, material and surface requirements that ensure interchangeability and safe operation in critical fluid systems.

Frequently Asked Questions

SIST EN 4191:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced, bulkhead branch, long". This standard covers: This standard specifies the characteristics of tees, reduced, bulkhead branch, long, 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 tees, reduced, bulkhead branch, long, 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

SIST EN 4191:2004 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 4191:2004 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 coupling 8°30' in titanium alloy - Tees, reduced, bulkhead branch, longLuft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - T-Verschraubungen, reduziert, seitlicher Auslass als Schottanschluss, lange AusführungSérie aérospatiale - Systeme de raccordement 8°30' en alliage de titane - Raccords en té, réduits pour traversée de cloison en pied, type longAerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced, bulkhead branch, long49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 4191:2001SIST EN 4191:2004en01-maj-2004SIST EN 4191:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4191October 2001ICS 49.080English versionAerospace series - Pipe coupling 8°30' in titanium alloy - Tees,reduced, bulkhead branch, longSérie aérospatiale - Système de raccordement 8°30' enalliage de titane - Raccords en té, réduits pour traversée decloison en pied, type longLuft- und Raumfahrt - Rohrverschraubung 8°30' ausTitanlegierung - T-Verschraubungen, reduziert, seitlicherAuslass als Schottanschluss, lange AusführungThis European Standard was approved by CEN on 19 April 2001.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 4191:2001 ESIST EN 4191:2004

ScopeThis standard specifies the characteristics of tees, reduced, bulkhead branch, long, for pipe couplings 8°30', in titaniumalloy, for aerospace applications.Nominal pressure: up to 28 000 kPaTemperature range:
55 °C to 135 °C2
Normative referencesThis Standard incorporates by dated or undated reference provisions from other publications. These normative referencesare cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequentamendments to or revisions of any of these publications apply to this European Standard only when incorporated in it byamendment or revision. For undated references, the latest edition of the publication referred to applies (includingamendments).ISO 5855-3,
Aerospace series — MJ threads — Part 3: Limit dimensions for fitting
...

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