SIST EN 3869:2005

• Abstract:

  This standard specifies the characteristics of seals for pipe couplings in fluorocarbon rubber and armature in aluminium alloy for aerospace applications.; NOTE : Assembly in accordance with TR 4053

• Status: Published
• Publication Date: 31-May-2005
• ICS: 49.025.20 - Aluminium
• 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-Jun-2005
• Due Date: 01-Jun-2005
• Completion Date: 01-Jun-2005
• Ref Project: EN 3869:2004 - Aerospace series - Pipe couplings, loose flanges and seals - Seals in fluorocarbon rubber and armature in aluminium alloy

• Replaces: SIST EN 3869:2004 - Aerospace series - Pipe couplings, loose flanges and seals - Seals in fluorocarbon rubber and armature in aluminium alloy
• Effective Date: 01-Jun-2005
• Refers: SIST EN 4054:2005 - Aerospace series - Pipe couplings, loose flanges and seals - Seals in fluorocarbon rubber and armature in aluminium alloy - Technical specification
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026

SIST EN 3869:2005 is the Slovenian adoption of EN 3869:2004, published by SIST. It specifies seals for aerospace pipe couplings with a fluorocarbon rubber sealing element and an aluminium-alloy armature, and it tells manufacturers how to identify, mark and build these seals for use with the related technical specification and assembly recommendations.

What does SIST EN 3869:2005 specify?

SIST EN 3869:2005 specifies the characteristics of seals for pipe couplings used in aerospace applications. The document focuses on the seal itself, not on the complete coupling system, and it ties the product to the matching technical specification and assembly recommendations.

The standard is organized into six main clauses: scope, normative references, required characteristics, designation, marking and technical specification. It also includes Figure 1 and Table 1, which give the seal configuration and the dimensional data used to identify the different sizes.

What are the key requirements of SIST EN 3869:2005?

SIST EN 3869:2005 centers on material selection, geometry, bonding, identification and marking. In practice, these are the points a designer, supplier or inspector checks before release or acceptance.

• Scope and assembly context - The seals are for aerospace pipe couplings, and assembly is linked to TR 4053. This matters because the seal is intended to work as part of a defined coupling system, not as a free-standing rubber part.
• Materials - The seal uses fluorocarbon rubber and an aluminium alloy armature, with the referenced material standards EN 2798 and EN 2699. This gives procurement and quality teams a clear material basis for ordering, testing and traceability.
• Configuration, dimensions and tolerances - Clause 3 points to Figure 1 and Table 1 for the seal shape, dimensions, tolerances and masses, with dimensions given in millimetres. In practice, this is the main inspection basis for checking that the part matches the approved size and form.
• Bonded construction - Clause 3 requires the two-part seal to be bonded. For manufacturing and incoming inspection, that means the seal is not simply an assembled stack of materials - the joint itself is part of the required product definition.
• Edge condition and sealing behaviour - The figure note calls for sharp edges to be removed on the non-rubber surfaces, and the sealing part is to be dimensioned so the bead stays within the lateral cavities during compression. This matters because edge condition and controlled compression affect sealing performance and durability.
• Designation - Clause 4 uses a description block and an identity block with the standard number and a diameter code. The designation gives a consistent way to order and record the exact seal size.
• Marking - Clause 5 points to EN 2424, category G, for product marking. This supports identification through manufacture, stocking and installation.
• Technical specification - Clause 6 refers to EN 4054. In practice, this is the document to use for the detailed technical specification when the seal is being specified or verified.

What terms does SIST EN 3869:2005 define?

• Fluorocarbon rubber (FPM) - The rubber material specified for the seal element.
• Armature - The aluminium-alloy reinforcement used with the rubber seal.
• Diameter code - The code in the designation that links the seal to a tube nominal diameter.
• Description block - The part of the designation that names the product type.
• Identity block - The part of the designation that gives the standard reference and diameter code.
• Category G - The marking category used under EN 2424 for this product.

Who uses SIST EN 3869:2005?

SIST EN 3869:2005 is used by aerospace manufacturers, pipe coupling and seal suppliers, and quality or inspection teams that verify dimensions, materials, marking and designation. It is also relevant to buyers and engineers who need to specify the correct seal for aerospace fluid systems and components.

What changed in SIST EN 3869:2005 from the previous edition?

SIST EN 3869:2005 supersedes EN 3869:2003.

Which standards are used with SIST EN 3869:2005?

• EN 2424 - Gives the marking method for aerospace products.
• EN 2699 - Specifies the aluminium alloy material used for the armature.
• EN 2798 - Specifies the fluorocarbon rubber material used for the seal.
• EN 4054 - Gives the technical specification for these seals.
• TR 4053 - Gives assembly recommendations for the related pipe couplings and seals.

What does the SIST EN 3869:2005 document contain?

The document contains the scope, the list of normative references and the required characteristics for the seal. Figure 1 shows the seal configuration, including the general arrangement and hole pattern, while Table 1 gives the size range, tolerances and mass data by diameter code. Clause 4 provides the designation structure, and the example shows how the standard number and diameter code are combined for ordering and identification. Clause 5 covers marking, and Clause 6 points to the technical specification to be used with the product.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Pipe couplings, loose flanges and seals - Seals in fluorocarbon rubber and armature in aluminium alloyLuft- und Raumfahrt - Rohrverbindungen mit losen Flanschen und Flanschdichtungen - Dichtungen aus Fluorcarbon-Elastomer mit AluminiumarmierungSérie aérospatiale - Raccords, brides amovibles et joints - Joints en élastomere fluorocarbone et armature en alliage d'aluminiumAerospace series - Pipe couplings, loose flanges and seals - Seals in fluorocarbon rubber and armature in aluminium alloy49.080Aerospace fluid systems and components49.025.20AluminijAluminiumICS:Ta slovenski standard je istoveten z:EN 3869:2004SIST EN 3869:2005en01-junij-2005SIST EN 3869:2005SLOVENSKI
STANDARDSIST EN 3869:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3869
November 2004 ICS 49.080
Supersedes EN 3869:2003
English version
Aerospace series - Pipe couplings, loose flanges and seals - Seals in fluorocarbon rubber and armature in aluminium alloy
Série aérospatiale - Raccords, brides amovibles et joints - Joints en élastomère fluorocarbone et armature en alliage d'aluminium
Luft- und Raumfahrt - Rohrverbindungen mit losen Flanschen und Flachdichtungen - Dichtungen aus Fluor-Elastomer mit Aluminiumarmierung This European Standard was approved by CEN on 11 September 2003.
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 Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3869:2004: ESIST EN 3869:2005

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Foreword.3 1 Scope.4 2 Normative references.4 3 Required characteristics.4 4 Designation.6 5 Marking.6 6 Technical specification.6 SIST EN 3869:2005

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