EN 3631:2008

SLOVENSKI STANDARD
01-november-2008
Aeronavtika - Cevna napeljava, s prirobnicami, kotna 90° - Tesnilke O za cevi z
debelino 0,8 mm
Aerospace series - Fluid fittings, flanged, 90° elbowed - Sealing by O-ring for 0,8 mm
thick tubes
Luft- und Raumfahrt - Rohrverbindungen mit Flansch, 90° - O-Ring-Dichtung für Rohre
mit einer Dicke von 0,8 mm
Série aérospatiale - Raccords à bride à 90° - Etanchéité par joint torique pour tubes de
0,8 mm d'épaisseur
Ta slovenski standard je istoveten z: EN 3631:2008
ICS:
49.080 /HWDOVNLLQYHVROMVNL Aerospace fluid systems and
KLGUDYOLþQLVLVWHPLLQGHOL components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3631
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2008
ICS 49.080
English Version
Aerospace series - Fluid fittings, flanged, 90° elbowed - Sealing
by O-ring for 0,8 mm thick tubes
Série aérospatiale - Raccords à bride à 90° - Etanchéité Luft- und Raumfahrt - Rohrverbindungen mit Flansch, 90° -
par joint torique pour tubes de 0,8 mm d'épaisseur O-Ring-Dichtung für Rohre mit einer Dicke von 0,8 mm
This European Standard was approved by CEN on 21 December 2007.

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 CEN 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 translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, 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
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3631:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Required characteristics.4
3.1 Configuration, dimensions, tolerances .4
4 Forging flanged fitting, Type A.5
5 Machined flanged fitting, Type B .8
6 Fitting .10
6.1 Fitting for tubes ∅∅∅∅ ≤≤≤≤ 16.10
6.2 Fitting for tubes ∅∅∅∅ > 16 .11
7 Cone and end fitting .12
8 Designation .13
9 Marking .13
10 Quality assurance.13

Figures
Figure 1 . 5
Figure 2 . 6
Figure 3 . 8
Figure 4 . 9
Figure 5 . 11
Figure 6 . 11
Figure 7 . 12
Figure 8 . 12

Tables
Table 1 . 7
Table 2 . 7
Table 3 . 10
Table 4 . 10
Table 5 . 13

Foreword
This document (EN 3631:2008) has been prepared by the Aerospace and Defence Industries Association of
Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by February 2009, and conflicting national standards shall be withdrawn
at the latest by February 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, De
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