SIST EN 4190:2004

Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced with thrust wire nut on run

This standard specifies the characteristics of tees, reduced, with thrust wire nut on run, 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 T-Durchgang mit Mutter mit Schubdraht

Diese Norm legt die Eigenschaften von T-Verschraubungen, reduziert, T-Durchgang mit Mutter mit Schubdraht, 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 avec écrou a jonc en ligne

La présente norme spécifie les caractéristiques des raccords en té, avec écrou à jonc en ligne, réduits, 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 with thrust wire nut on run

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 4190:2001 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced with thrust wire nut on run

Relations

• Refers: SIST EN 3275:2019 - Aerospace series - Pipe coupling 8°30' up to 28 000 kPa Dynamic beam seal - Metric series - Technical specification
• Effective Date: 28-Jan-2026
• Refers: SIST EN 3273:2004 - Aerospace series - Pipe coupling 8°30' - Dynamic beam seal end for elbows, tees and crosses - Geometric configuration
• Effective Date: 28-Jan-2026
• Refers: SIST EN 3274:2011 - Aerospace series - Pipe coupling 8°30' - Thread end - Geometric configuration
• Effective Date: 28-Jan-2026
• Refers: SIST EN 3311:2024 - Aerospace series - Titanium alloy TI-P64001 (Ti-6Al-4V) - Annealed - Bars for machining - D ≤ 300 mm - 900 MPa ≤ Rm ≤ 1 160 MPa
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2491:2011 - Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
• Effective Date: 28-Jan-2026
• Refers: SIST EN 4032:2002 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Thrust wire
• Effective Date: 28-Jan-2026
• Refers: SIST EN 3312:2012 - Aerospace series - Titanium alloy Ti-6Al-4V - Annealed - Forgings De ≤ 150 mm
• Effective Date: 28-Jan-2026
• Refers: SIST EN 3264:2018 - Aerospace series - Pipe coupling 8°30' in titanium alloy - Thrust wire nuts
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 8442-9:2018 - Materials and articles in contact with foodstuffs - Cutlery and table holloware - Part 9: Requirements for ceramic knives (ISO 8442-9:2018)
• Effective Date: 28-Jan-2026

Overview

SIST EN 4190:2004 is a European standard developed by CEN under the aerospace series, outlining specifications for pipe coupling 8°30' in titanium alloy - tees, reduced with thrust wire nut on run. This standard focuses on detailing the required characteristics, configuration, materials, and performance criteria for these specialized tee fittings, which are widely used in aerospace fluid systems. With a nominal pressure capacity of up to 28,000 kPa and an operating temperature range from -55°C to 135°C, these titanium alloy couplings deliver robust and reliable connections in demanding aerospace environments.

Key Topics

• Designation and Configuration

  • Specifies tees with reduced outlets, designed for use with pipe couplings featuring an 8°30' angle and equipped with thrust wire nuts on the main run.
  • Dimensional requirements, configuration details, and allowable tolerances are clearly defined to ensure compatible integration within aerospace fluid systems.

• Material and Surface Treatment

  • Components are manufactured from aerospace-grade titanium alloys, conforming to standards such as EN 3311, EN 3312, EN 3314, and EN 3315.
  • Surface treatments include abrasive blasting with non-metallic grit followed by molybdenum disulphide dry lubricants per EN 2491, enhancing corrosion resistance and durability.
  • Surface roughness and internal finish standards are established to optimize fluid flow and mechanical performance.

• Performance Specifications

  • Supports nominal operating pressures up to 28,000 kPa, suitable for high-pressure hydraulic and fuel lines.
  • Ensures operational integrity across a wide temperature range, from -55°C to 135°C, critical for aerospace applications.

• Marking and Identification

  • Marking requirements follow EN 2424 to guarantee traceability and compliance in aerospace supply chains.

Applications

• Aerospace Hydraulic and Fuel Systems

  • These titanium alloy tees are engineered for integration in critical hydraulic, fuel, and pneumatic circuits, providing secure pipe joints where high strength-to-weight ratio and resistance to corrosion are imperative.
  • Reduced tees with thrust wire nuts are particularly suitable for complex routing where standard fittings may not fulfill space or pressure requirements.

• Avionics and Spacecraft Fluid Distribution

  • The specification offers value in applications where reliability and compatibility with titanium piping systems are non-negotiable, such as manned and unmanned space vehicles.

• Military Aircraft and Advanced Civil Aviation

  • The standard supports standardization of fluid system components across multinational aerospace programs, reducing the risk of incompatibility and ensuring interoperability.

Related Standards

To ensure conformity and compatibility, SIST EN 4190:2004 references several key standards within the aerospace domain, including but not limited to:

• ISO 5855-3: Limit dimensions for MJ thread fittings in fluid systems.
• EN 2424: Marking of aerospace products.
• EN 2491: Dry lubricants - Molybdenum disulphide coating methods.
• EN 3264 & EN 4032: Specifications for titanium alloy thrust wire nuts and wires.
• EN 3273 & EN 3274: Geometric configuration for beam seal ends and threaded ends.
• EN 3275: Technical specification for pipe couplings 8°30’ up to 28,000 kPa.
• EN 3311, EN 3312, EN 3314, EN 3315: Material standards for titanium alloys used in aerospace fluid system components.

SIST EN 4190:2004 is crucial for manufacturers, engineers, and quality assurance specialists engaged in aerospace fluid systems, providing internationally recognized specifications that enhance reliability, safety, and product compatibility across the aerospace industry.

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 with thrust wire nut on runLuft- und Raumfahrt - Rohrverschraubung 8°30' aus Titanlegierung - T-Verschraubungen, reduziert T-Durchgang mit Mutter mit SchubdrahtSérie aérospatiale - Systeme de raccordement 8°30' en alliage de titane - Raccords en té, réduits avec écrou a jonc en ligneAerospace series - Pipe coupling 8°30' in titanium alloy - Tees, reduced with thrust wire nut on run49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 4190:2001SIST EN 4190:2004en01-maj-2004SIST EN 4190:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4190October 2001ICS 49.080English versionAerospace series - Pipe coupling 8°30' in titanium alloy - Tees,reduced with thrust wire nut on runSérie aérospatiale - Système de raccordement 8°30' enalliage de titane - Raccords en té, réduits avec écrou à joncen ligneLuft- und Raumfahrt - Rohrverschraubung 8°30' ausTitanlegierung - T-Verschraubungen, reduziert T-Durchgang mit Mutter mit SchubdrahtThis European Standard was approved by CEN on 28 February 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 4190:2001 ESIST EN 4190:2004

ScopeThis standard specifies the characteristics of tees, reduced, with thrust wire nut on run, 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 European Standard incorporates by dated or undated reference provisions from other publications. These normativereferences are cited at the appropriate places in the text and the publications are listed hereafter. For dated references,subsequent amendments to or revisions of any of these publications apply to this European Standard only whenincorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies(including amendments).ISO 5855-3,
Aerospace series — MJ threads — Part 3: Limit dimensions for fittings for fluid systems.EN 2424,
Aerospace series — Marking of aerospace products.EN 2491,
Aerospace series — Molybdenum disulphide dry lubricants — Coating methods.EN 3264,
Aerospace series — Pipe coupling 8°30' in titanium alloy — Thrust wire nuts.EN 3273,
Aerospace series — Pipe coupling 8°30' — Dynamic beam seal end for elbows, tees and crosses — Geometricconfiguration.EN 3274,
Aerospace series — Pipe coupling 8°30' — Thread ends — Geometric configuration.EN 3275,
Aerospace series — Pipe coupling 8°30' up to 28 000 kPa — Dynamic beam seal — Metric series — Technicalspecification.EN 3311,
Aerospace series — Titanium alloy TI-P64001 — Annealed — Bar for machining — D £ 150 mm.1)EN 3312,
Aerospace series — Titanium alloy TI-P64001 — Grade 2 — Annealed — Forgings — De £ 150 mm.1)EN 3314,
Aerospace series — Titanium alloy TI-P64001 — Solution treated and aged — Bar for machining —D £ 75 mm.1)EN 3315,
Aerospace series — Titanium alloy TI-P64001 — Solution treated and aged — Forgings — De £ 75 mm.1)EN 4032,
Aerospace series — Pipe coupling 8°30' in titanium alloy — Thrust wires.3
Required characteristics3.1
Configuration — Dimensions — MassAccording to figures 1 to 4 and tables 1 to 4. Dimensions apply before lubricating.Dimensions not specified are at manufacturer's option provided that the qualification and acceptance requirementsof EN 3275, type II are met.
1) Published as AECMA Prestandard at the date of publication of this standard3SIST EN 4190:2004

Surface roughnessAccording to figure 1, unless otherwise specified in the design documentation.3.3
MaterialsAccording to EN 3311 or EN 3314, EN 3312 or EN 3315.3.4
Surface treatmentLubrication: according to EN 2491, on threads, sealing faces and contact area between thrust wire and coupling.Prior to application of the lubricant, the surface shall be abrasive blasted using non-metallic grit.Film thickness 0,005 mm to 0,013 mm.3.5
Internal surface finishingFinishing shall give a radius R of 0,3 mm to 1,0 mm and a surface roughness of 0,8 µm. Hand deburring is notpermitted.Dimensions in millimetresKey1Nut according to EN 32642Thrust wire according to EN 4032aConnection 1gAccording to EN 3274, form CbConnection 2hAcross flats s2cConnection 3iArea for markingdThread 1jFully insertedeThread 2kR 0,3 to 1,0fAccording to EN 3273Figure 14SIST EN 4190:2004
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