EN 1092-4:2002

Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 4: Aluminium alloy flanges

This standard specifies requirements for PN designated circular flanges for pipes, valves, fittings and accessories made from aluminium alloy in the range of DN 15 to DN 600 and PN10 to PN 63 (see Table 1).
This standard specifies the types of flanges and their facings, dimensions and tolerances, bolt sizes, surface finish of jointing faces, marking and materials together with associated pressure/temperature (p/T) ratings.
The flanges are intended to be used for piping as well as for pressure vessels.

Flansche und ihre Verbindungen - Runde Flansche für Rohre, Armaturen, Formstücke und Zubehörteile, nach PN bezeichnet - Teil 4: Flansche aus Aluminiumlegierungen

Diese Norm legt Anforderungen an PN-bezeichnete kreisförmige Flansche für Rohre, Armaturen, Formstücke und Zubehörteile fest. Die Flansche werden hergestellt aus Aluminiumlegierung im Bereich DN 15 bis DN 600 und PN 10 bis PN 63 (siehe Tabelle 1).
Diese Norm enthält Festlegungen über die Typen der Flansche und ihre Dichtflächen, die Abmessungen und Toleranzen, die Schraubengrößen, die Oberflächengüte der Dichtflächen, die Kennzeichnung und Werkstoffe zusammen mit zugehörigen Druck/Temperatur-Zuordnungen (p/T ratings).
Die Flansche sind vorgesehen für den Einsatz sowohl bei Rohrleitungen als auch bei Druckbehältern.

Brides et leurs assemblages - Brides circulaires pour tubes, appareils de robinetterie, raccords et accessoires, désignées PN - Partie 4: Brides en alliages d'aluminium

La présente Norme européenne spécifie les exigences applicables aux brides circulaires désignées PN pour tubes, appareils de robinetterie, raccords et accessoires en alliages d'aluminium dans les gammes de DN 15 à DN 600 et pour PN 10 à PN 63 (voir Tableau 1).
La présente Norme européenne spécifie les types de brides et leurs portées de joints, les dimensions et tolérances, les dimensions de boulonnerie, les états de surface des portées de joints, le marquage et les matériaux ainsi que les relations pression/température (p/T) associées.
Les brides sont prévues pour être utilisée sur les réseaux de tuyauteries ainsi que sur les appareils à pression.

Prirobnice in prirobnični spoji - Okrogle prirobnice za cevi, ventile, fitinge in pribor z oznako PN - 4. del: Prirobnice iz aluminijevih zlitin

General Information

• Status: Published
• Publication Date: 28-May-2002
• Withdrawal Date: 29-Nov-2002
• ICS: 23.040.60 - Flanges, couplings and joints
• Technical Committee: CEN/TC 74 - Flanges and their joints
• Drafting Committee: CEN/TC 74 - Flanges and their joints
• Current Stage: 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
• Start Date: 04-Jun-2023
• Completion Date: 04-Jun-2023
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Mandate: M/109 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on fire alarm/detection, fixed firefighting, fire and smoke control and explosion suppression products
• Ref Project: SIST EN 1092-4:2002 - Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 4: Aluminium alloy flanges

Overview

EN 1092-4:2002 - "Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 4: Aluminium alloy flanges" is the CEN standard that defines requirements for PN-designated circular aluminium alloy flanges. It covers flanges for nominal sizes DN 15 to DN 600 and pressure ratings PN 10 to PN 63. The standard specifies flange types, facings, dimensions and tolerances, bolt sizes, jointing-face surface finish, marking, permitted materials and associated pressure/temperature (p/T) ratings. Flanges under EN 1092-4 are intended for piping systems and pressure vessels and are dimensionally compatible with other EN 1092 parts and ISO 7005.

Key topics and technical requirements

• Scope & designation: DN and PN ranges, flange type numbering (e.g., Type 05 blank, Type 11 weld-neck) and full designation format (EN 1092-4 - type - facing - DN - … - PN - material).
• Materials: Typical aluminium grades referenced (e.g., EN AW‑5083‑O, EN AW‑6061‑T6) per EN 12392; other alloys allowed if p/T ratings are established.
• Dimensions & tolerances: Detailed mating dimensions, flange dimensions and tolerances for PN 10, 16, 25, 40 and 63 (tables and figures provided).
• Flange facings & surface finish: Facing types (raised face, tongue/groove, etc.), facing dimensions and jointing-face roughness requirements (Ra, Rz) per EN ISO 4287.
• Bolting & gaskets: Bolt sizes and selection guidance referencing EN 1515-1; washer use (EN ISO 887) recommended; gasket selection per EN 1514.
• p/T ratings & marking: Pressure/temperature ratings given for specified alloys (Table 10); required marking (manufacturer, EN number, DN, PN, material, batch).
• Manufacturing constraints: Forged or extruded options for weld-neck flanges, no repair welding permitted, spot/back facing limits and hub/neck rules.

Applications and users

EN 1092-4 is used by:

• Piping and pressure-vessel designers and engineers specifying aluminium alloy flanges
• Manufacturers and fabricators producing PN-designated aluminium flanges
• Procurement/specification teams preparing purchase orders and inspection criteria
• Quality, testing and certification bodies verifying marking, material and p/T compliance

Typical practical uses include installations requiring lightweight, corrosion-resistant flanges in piping systems and pressure equipment where aluminium alloys are preferred.

Related standards

• EN 1092 (Parts 1–3) - steel, cast iron, copper alloy flanges
• EN 1514 - gasket dimensions for PN flanges
• EN 1515-1 - bolting selection
• EN 12392 - aluminium product requirements for pressure equipment
• EN ISO 4287, EN ISO 887, EN ISO 6708, EN 764

Keywords: EN 1092-4, aluminium alloy flanges, PN designated, DN 15–600, flange facings, p/T ratings, flange dimensions, bolting, EN 1092.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2002
Prirobnice in prirobnični spoji - Okrogle prirobnice za cevi, ventile, fitinge in pribor
z oznako PN - 4. del: Prirobnice iz aluminijevih zlitin
Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 4: Aluminium alloy flanges
Flansche und ihre Verbindungen - Runde Flansche für Rohre, Armaturen, Formstücke
und Zubehörteile, nach PN bezeichnet - Teil 4: Flansche aus Aluminiumlegierungen
Brides et leurs assemblages - Brides circulaires pour tubes, appareils de robinetterie,
raccords et accessoires, désignées PN - Partie 4: Brides en alliages d'aluminium
Ta slovenski standard je istoveten z: EN 1092-4:2002
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
77.150.10 Aluminijski izdelki Aluminium products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 1092-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2002
ICS 23.040.60
English version
Flanges and their joints - Circular flanges for pipes, valves,
fittings and accessories, PN designated - Part 4: Aluminium
alloy flanges
Brides et leurs assemblages - Brides circulaires pour Flansche und ihre Verbindungen - Runde Flansche für
tubes, appareils de robinetterie, raccords et accessoires, Rohre, Armaturen, Formstücke und Zubehörteile, nach PN
désignées PN - Partie 4: Brides en alliages d'aluminium bezeichnet - Teil 4: Flansche aus Aluminiumlegierungen
This European Standard was approved by CEN on 28 March 2002.
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 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 Management Centre has the same status as the official
versions.
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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1092-4:2002 E
worldwide for CEN national Members.

Contents
page
Foreword------------------------------------------------------------------------------------------------------ 3
1 Scope -------------------------------------------------------------------------------------------------- 4
2 Normative references----------------------------------------------------------------------------- 4
3 Terms and definitions ---------------------------------------------------------------------------- 5
4 Designations ---------------------------------------------------------------------------------------- 5
4.1 Range of DN 5
4.2 Range of PN designations 5
4.3 Types of flanges 5
4.4 Designation of flanges 5
5 General requirements ---------------------------------------------------------------------------- 6
5.1 Flange materials 6
5.2 Repairs 6
5.3 Bolting 6
5.4 Gaskets 6
5.5 Pressure temperature (p/T) ratings 6
5.6 Dimensions 6
5.7 Flange facings 7
5.8 Spot facing and back facing of flanges 7
5.9 Tolerances 7
5.10 Marking 7
Figure 1 - Types of flanges 8
Figure 2 - Flange facings 9
Figure 3 - Dimensions of PN 10 flanges 10
Figure 4 - Dimensions of PN 16 flanges 11
Figure 5 - Dimensions of PN 25 flanges 12
Figure 6 - Dimensions of PN 40 flanges 13
Figure 7 - Dimensions of PN 63 flanges 14
for 15
Annex A (informative) Masses of flanges---------------------------------------------------------16
Annex ZA (informative)  Clauses of this European Standard addressing
essential requirements (ER’s) or other provisions of EU Directives---------------------17
Table 1 - Synoptic table 8
Table 2 - Flange facing dimensions 9
Table 3 - Surface finish of flange jointing faces 9
Table 4 - Dimensions of PN 10 flanges 10
Table 5 - Dimensions of PN 16 flanges 11
Table 6 - Dimensions of PN 25 flanges 12
Table 7 - Dimensions of PN 40 flanges 13
Table 8 - Dimensions of PN 63 flanges 14
Table 9 - Tolerances on dimensions 15
Table 10 - p/T ratings 15
Table A.1 - Masses of flanges 16
Table ZA.1 - Correspondence between this European Standard and Directive
97/23/EC 17
Foreword
This document EN 1092-4:2002 has been prepared by Technical Committee CEN/TC 74 "Flanges
and their joints", the secretariat of which is held by DIN.
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 November 2002, and conflicting national standards
shall be withdrawn at the latest by November 2002.
This document has been prepared under a mandate given to CEN by the European Commission and
the European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this
document.
EN 1092 consists of the following four parts:
Part 1: Steel flanges;
Part 2: Cast iron flanges;
Part 3: Copper alloy flanges;
Part 4: Aluminium alloy flanges.
The mating dimensions of the flanges of this standard are compatible with those flanges of other
materials in accordance with the other parts of EN 1092 and with those flanges of ISO 7005.
Annex A is informative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
1 Scope
This European Standard specifies requirements for PN designated circular flanges for pipes, valves,
fittings and accessories made from aluminium alloy in the range of DN 15 to DN 600 and PN10 to
PN 63 (see Table 1).
This European Standard specifies the types of flanges and their facings, dimensions and tolerances,
bolt sizes, surface finish of jointing faces, marking and materials together with associated
pressure/temperature (p/T) ratings.
The flanges are intended to be used for piping as well as for pressure vessels.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text, and the
publications are listed hereafter. For dated references, subsequent amendments to or provisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
EN 764, Pressure equipment - Terminology and symbols - Pressure, temperature, volume.
EN 1333, Pipework components - Definition and selection of PN.
EN 1514, Flanges and their joints - Dimensions of gaskets for PN-designated flanges.
EN 1515-1, Flanges and their joints - Bolting - Part 1: Selection of bolting.
EN 12392, Aluminium and aluminium alloys - Wrought products - Special requirements for products
intended for the production of pressure equipment.
EN ISO 887, Plain washers for metric bolts, screws and nuts for general purposes - General plan
(ISO 887:2000).
EN ISO 4287, Geometrical product specifications (GPS) - Surface texture: Profile method - Terms,
definitions and surface texture parameters (ISO 4287:1997).
EN ISO 6708, Pipework Components - Definition and selection of DN (nominal size)
(ISO 6708:1995).
3 Terms and definitions
For the purposes of this European Standard the following terms and definitions apply.
3.1
DN
see EN ISO 6708
3.2
PN
see EN 1333
3.3
Ra, Rz
see EN ISO 4287
3.4
maximum allowable pressure, PS
PS means the maximum pressure for which the equipment is designed, as specified by the
equipment manufacturer
(See also EN 764, where it is defined as allowable pressure p ).
S
3.5
maximum allowable temperature, TS
TS means the maximum temperature for which the equipment is designed, as specified by the
equipment manufacturer
(See also EN 764, where it is defined as allowable temperature t ).
S
4 Designations
4.1 Range of DN
The range of DN applicable to each PN shall be as given in Table 1.
4.2 Range of PN designations
The range of PN designations shall be as given in Table 1.
4.3 Types of flanges
Figure 1 illustrates flanges identified according to type:
a) Type 05 Blank flange;
b) Type 11 Weld-neck flange.
4.4 Designation of flanges
The designation of the flanges shall contain the following information:
a) Description (flange);
b) Number of this standard (EN 1092-4);
c) Flange type number (11, 05 resp.);
d) Flange facing type (e.g. C);
e) DN (e.g. DN 300);
f) For type 11 flanges only, the neck diameter, A and the neck thickness, S, (e.g. 324 x 4);
g) PN (e.g. PN 40);
h) Material (e.g. EN AW-5083-O).
EXAMPLE 1
For a type 11 flange : Flange EN 1092-4 - 11 - C - DN 300 - 324 x 4 - PN 40 - EN AW-5083-O
EXAMPLE 2
For a type 05 flange : Flange EN 1092-4 - 05 - C - DN 300 - PN 40 - EN AW-5083-O
5 General requirements
5.1 Flange materials
Flanges shall be manufactured from the material grades EN AW-5083 (AlMg4,5Mn0,7) -O or
EN AW-6061 (AlMg1SiCu) -T6 as specified in EN 12392. Other materials may be used. For the
p/T ratings see 5.5.
Weld-neck flanges shall be forged or made from extruded bars; blank flanges shall be forged or
made from plate.
5.2 Repairs
Repair welding of the flanges is not permitted.
5.3 Bolting
5.3.1 The bolting shall be chosen according to the pressure, temperature and gasket.
5.3.2 Bolting materials shall be selected according to the following criteria:
a) For all service conditions in accordance with EN 1515-1 (bolt/nut): 5.6/5, 8.8/8, 25Ni-15Cr-
Ti/25Ni-15Cr-Ti, A4-70/A4-70, A2-70/A2-70, 18Cr-9Ni-Mo-AT+C/18Cr-9Ni-Mo, 18Cr-9Ni-
AT+C/18Cr-9Ni;
b) For less severe service conditions e. g. water service or in case of oversized flanged joints, in
accordance with EN 1515-1 (bolt/nut): A4-50/A4-50, A2-50/A2-50, 18Cr-9Ni-Mo/18Cr-9Ni-Mo,
18Cr-9Ni/18Cr-9Ni;
The choice of this bolting shall be based on either special experience or on recalculations.
c) Where bolting other than specified in EN 1515-1 is required, this shall be chosen according to
the parameters above so that the flanged joint remains tight under the expected operating
conditions.
5.3.3 The use of washers (EN ISO 887) is recommended.
5.4 Gaskets
Gaskets shall be selected from the relevant part of EN 1514.
NOTE If spiral wound gaskets are selected, than they should be low stress design (y = 5000, m = 3 for
calculation in accordance with ASME Code).
5.5 Pressure temperature (p/T) ratings
The pressure temperature ratings (p/T ratings) for the material grades in 5.1 are given in Table 10.
For other aluminium alloys, which may be used, the p/T ratings shall be established according to the
service conditions.
5.6 Dimensions
5.6.1 Dimensions of flanges shall be in accordance with Figure 3 to Figure 7 and as appropriate
the following Tables:
• PN 10 flanges: Table 4;
• PN 16 flanges: Table 5;
• PN 25 flanges: Table 6;
• PN 40 flanges: Table 7;
• PN 63 flanges: Table 8.
NOTE 1 Approximate masses of flanges are given in annex A.

NOTE 2 Figures 3 to 7 are identical. They are repeated for better handling of the standard.

5.6.2 Bolt holes shall be equally spaced on the pitch circle diameter.

5.6.3 If the neck thickness, S is ordered smaller than given in Tables 4 to 8, the inside diameter at
the neck shall be tapered at an angle of 14 ° to 18 °. If S is ordered greater, the bore diameter shall
be AS-·2 .
5.7 Flange facings
5.7.1 Types of facings
The types of flange facings shall be as given in Figure 2, and their dimensions shall be as given in
Table 2.
If not stated in the purchase order, flange facing B1 is standard for flanges up to PN 40, flange facing
B2 is standard for PN 63 flanges.

5.7.2 Jointing face finish
All flange jointing faces shall be machine finished and, when compared by visual or tactile means
with reference specimens, shall be in accordance with Table 3.

N OTE 1 It is not intended that instrument measurements are taken on the jointing faces.

NOTE 2 Other jointing face finishes may be agreed.

For jointing face type B1, turning shall be carried out with a round-nosed tool in accordance with
Table 3.
5.8 Spot facing and back facing of flanges
Any spot facing and back facing required shall not reduce the flange thickness to less
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flansche und ihre Verbindungen - Runde Flansche für Rohre, Armaturen, Formstücke und Zubehörteile, nach PN bezeichnet - Teil 4: Flansche aus AluminiumlegierungenBrides et leurs assemblages - Brides circulaires pour tubes, appareils de robinetterie, raccords et accessoires, désignées PN - Partie 4: Brides en alliages d'aluminiumFlanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 4: Aluminium alloy flanges77.150.10Aluminijski izdelkiAluminium products23.040.60Prirobnice, oglavki in spojni elementiFlanges, couplings and jointsICS:Ta slovenski standard je istoveten z:EN 1092-4:2002SIST EN 1092-4:2002en01-november-2002SIST EN 1092-4:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1092-4May 2002ICS 23.040.60English versionFlanges and their joints - Circular flanges for pipes, valves,fittings and accessories, PN designated - Part 4: Aluminiumalloy flangesBrides et leurs assemblages - Brides circulaires pourtubes, appareils de robinetterie, raccords et accessoires,désignées PN - Partie 4: Brides en alliages d'aluminiumFlansche und ihre Verbindungen - Runde Flansche fürRohre, Armaturen, Formstücke und Zubehörteile, nach PNbezeichnet - Teil 4: Flansche aus AluminiumlegierungenThis European Standard was approved by CEN on 28 March 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 1092-4:2002 ESIST EN 1092-4:2002

(informative)
Masses of flanges---------------------------------------------------------16Annex ZA
(informative)
Clauses of this European Standard addressingessential requirements (ER’s) or other provisions of EU Directives---------------------17Table 1 - Synoptic table8Table 2 - Flange facing dimensions9Table 3 - Surface finish of flange jointing faces9Table 4 - Dimensions of PN 10 flanges10Table 5 - Dimensions of PN 16 flanges11Table 6 - Dimensions of PN 25 flanges12Table 7 - Dimensions of PN 40 flanges13Table 8 - Dimensions of PN 63 flanges14Table 9 - Tolerances on dimensions15Table 10 - p/T ratings15Table A.1 - Masses of flanges16Table ZA.1 - Correspondence between this European Standard and Directive97/23/EC17SIST EN 1092-4:2002

Table 4;SIST EN 1092-4:2002
Table 5;· PN 25 flanges:
Table 6;· PN 40 flanges:
Table 7;· PN 63 flanges:
Table 8. NOTE 1Approximate masses of flanges are given in annex A. NOTE 2Figures 3 to 7 are identical. They are repeated for better handling of the standard.
5.6.2Bolt holes shall be equally spaced on the pitch circle diameter.
5.6.3If the neck thickness, S is ordered smaller than given in Tables 4 to 8, the inside diameter atthe neck shall be tapered at an angle of 14 ° to 18 °. If S is ordered greater, the bore diameter shallbe AS-´2.
5.7Flange facings5.7.1Types of facings The types of flange facings shall be as given in Figure 2, and their dimensions shall be as given inTable 2.
If not stated in the purchase order, flange facing B1 is standard for flanges up to PN 40, flange facingB2 is standard for PN 63 flanges. 5.7.2Jointing face finish All flange jointing faces shall be machine finished and, when compared by visual or tactile meanswith reference specimens, shall be in accordance with Table 3.
NOTE 1It is not intended that instrument measurements are
...