SIST EN 1759-3:2004

SLOVENSKI STANDARD
01-junij-2004
Prirobnice in prirobnični spoji - Okrogle prirobnice za cevi, ventile, fitinge in pribor
z oznako Class - 3. del: Prirobnice iz bakrovih zlitin
Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories,
Class designated - Part 3: Copper alloy flanges
Flansche und ihre Verbindungen - Runde Flansche für Rohre, Armaturen, Formstücke
und Zubehörteile, nach Class bezeichnet - Teil 3: Flansche aus Kupferlegierungen
Brides et leurs assemblages - Brides circulaires pour tubes, appareils de robinetterie,
raccords et accessoires, désignées Class - Partie 3: Brides en alliages de cuivre
Ta slovenski standard je istoveten z: EN 1759-3:2003
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 1759-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2003
ICS 23.040.60
English version
Flanges and their joints - Circular flanges for pipes, valves,
fittings and accessories, Class designated - Part 3: Copper alloy
flanges
Brides et leurs assemblages - Brides circulaires pour tubes, Flansche und ihre Verbindungen - Runde Flansche für
appareils de robinetterie, raccords et accessoires, Rohre, Armaturen, Formstücke und Zubehörteile, nach
désignées Class - Partie 3: Brides en alliages de cuivre Class bezeichnet - Teil 3: Flansche aus Kupferlegierungen
This European Standard was approved by CEN on 27 June 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 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,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, 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
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1759-3:2003 E
worldwide for CEN national Members.

Contents Page
Foreword.3
Introduction .3
1 Scope .4
2 Normative references .6
3 Terms and definitions.6
4 Designation.7
4.1 General.7
4.2 Standard designation .7
4.3 Information to be supplied by the equipment manufacturer.7
5 General requirements.8
5.1 Materials.8
5.2 Repairs.8
5.3 Bolting .8
5.4 Gaskets .8
5.5 Pressure/temperature (p/T) ratings.8
5.6 Dimensions .9
5.7 Flange facings.9
5.8 Spot facing or back facing.10
5.9 Tolerances .10
5.10 Marking .10
Annex A (informative) Information to be supplied by the equipment manufacturer.21
Annex B (informative) Application and installation .22
Annex C (informative) Use of metric bolting in lieu of imperial bolting.23
C.1 General.23
C.2 Gaskets .23
C.3 Comparable nominal bolt sizes.23
C.4 Imperial/metric bolt comparisons .23
Annex D (informative) Approximate masses of flanges and collars.24
Annex ZA (informative) Relationship between this European Standard and the Essential Requirements
of EU Directive 97/23/EC .27
Bibliography .28
Foreword
This document (EN 1759-3:2003) 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 March 2004, and conflicting national standards shall be withdrawn at the latest by
March 2004.
This document has been prepared under a mandate given to CEN by the European Commission and the European
1)
Free Trade Association, and supports essential requirements of the Pressure Equipment Directive (PED) . For
relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard.
EN 1759 consists of the following parts:
� Part 1: Steel flanges (draft stage);
� Part 3: Copper alloy flanges (draft stage);
� Part 4: Aluminium alloy flanges (draft stage).
The annexes A, B, C, D and ZA are 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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
Introduction
This standard is related, but not identical, to IS0 7005-3 in respect of flanges having designations Class 150 and
Class 300. Outside diameters and mating dimensions are in accordance with ANSI B16.24.
Information on the use of metric bolting in lieu of imperial bolting which can be used with these flanges is given in
an informative annex.
The mating dimensions of the flanges of this standard are compatible with Class designated flanges of other
materials in accordance with the other parts of EN 1759.

1)
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; OIEC L 181.
1 Scope
This European Standard specifies requirements for circular copper alloy flanges and copper alloy collars combined with
loose steel plate flanges in Class designations Class 150 and Class 300 and nominal sizes from DN 10 to DN 900
(NPS ½ to NPS 36) in the types shown in Table 1.
This standard also specifies dimensions and tolerances, materials and their associated pressure/temperature (p/T)
ratings, flange facings and related surface finish, weld repairs and marking together with information on bolting,
gaskets, application and installation and approximate flange masses.
The flanges specified, with the exception of integral (type 21) flanges, are for attachment to copper or copper alloy
tubes in accordance with EN 12449.
NOTE 1 The size of copper and copper alloy tubes is designated by reference to the outside diameter in millimetres.
NOTE 2 See also annex B.
NOTE 3 Non-gasketed pipe joints are outside the scope of this standard.
Table 1 — Types of flanges and collars
Type
Description
No.
01 Plate flange in copper alloy for brazing or welding
04 Loose plate flange in steel with a weld-neck collar (type 34) in copper alloy, for welding
05 Blank flange in copper alloy
05C Blank flange in steel clad with a copper alloy jointing face
Loose plate flange in steel with a slip-on collar (type 37) in copper alloy, for soft soldering,
brazing or welding
11 Weld-neck flange in copper alloy for welding
12 Hubbed slip-on flange in copper alloy, for soft soldering, brazing or welding
Hubbed slip-on flange in copper alloy supplied with tube stops, for soft soldering, brazing or
welding
21 Integral flange in copper alloy as part of some other equipment or component
34 Weld-neck collar in copper alloy
37 Slip-on collar in copper alloy
Type 01 Type 04, 34 Type 05, 05C
Plate flange in copper alloy Loose plate flange in steel with a 05 Blank flange in copper alloy
for brazing or welding weld-neck collar(type 34) in copper 05C Blank flange in steel clad with a
alloy, for welding copper alloy jointing face
Type 07, 37 Type 11 Type 12
Loose plate flange in steel with a Weld-neck flange in copper alloy for Hubbed slip- on flange in copper
slip-on collar (type 37) in copper welding alloy, for soft soldering, brazing or
alloy, for soft soldering, brazing or welding
welding
Steel component
Type 14 Type 21 Copper alloy component
Hubbed slip-on flange in copper Integral flange in copper alloy as
alloy supplied with tube stops, for part of some other equipment or
soft soldering, brazing or welding component
Figure 1 — Types of flanges and collars
2 Normative references
This European Standard incorporates by dated or undated references, 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 revisions 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 1652, Copper and copper alloys — Plate, sheet, strip and circles for general purposes.
EN 1982, Copper and copper alloys — Ingots and castings.
EN 10028-2, Flat products made of steels for pressure purposes — Part 2: Non-alloy and alloy steels with specified
elevated temperature properties.
EN 10222-2, Steel forgings for pressure purposes — Part 2: Ferritic and martensitic steels with specified elevated
temperature properties.
EN 12420, Copper and copper alloys — Forgings.
EN 12449, Copper and copper alloys — Seamless round tubes for general purposes.
EN ISO 887, Plain washers for metric bolts, screws and nuts for general purposes — General plan (ISO 887:2000).
EN ISO 4287, Geometrical Product Specification (GPS) — Surface texture: Profile method — Terms, definitions
and surface texture parameters (ISO 4287:1997).
EN ISO 6708:1995, Pipework components — Definition and selection of DN (nominal size) (ISO 6708:1995).
3 Terms and definitions
For the purposes of this standard the following terms and definitions apply.
3.1
Class
alphanumeric designation used for reference purposes related to a combination of mechanical and
dimensional characteristics of a component of a pipework system. It comprises the word Class followed by a
dimensionless whole number
NOTE 1 The number following the word Class does not represent a measurable value and should not be used for calculation
purposes except where specified in the relevant standard.
NOTE 2 The designation Class is not mean
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