SIST EN 593:2004

SLOVENSKI STANDARD
SIST EN 593:2004
01-september-2004
1DGRPHãþD
SIST EN 593:2000
Industrijski ventili - Kovinske lopute
Industrial valves - Metallic butterfly valves
Industriearmaturen - Metallische Klappen
Robinetterie industrielle - Robinets métalliques a papillon
Ta slovenski standard je istoveten z: EN 593:2004
ICS:
23.060.30
SIST EN 593:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN 593
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2004
ICS 23.060.30 Supersedes EN 593:1998
English version
Industrial valves - Metallic butterfly valves
Robinetterie industrielle - Robinets métalliques à papillon Industriearmaturen - Metallische Klappen
This European Standard was approved by CEN on 24 December 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 Ref. No. EN 593:2004: E
worldwide for CEN national Members.

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EN 593:2004 (E)
Contents page
Foreword. 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions. 5
4 Requirements . 8
4.1 Design . 8
4.1.1 Construction. 8
4.1.2 Materials. 10
4.1.3 Pressure/temperature ratings. 10
4.1.4 Dimensions and tolerances . 11
4.1.5 Operation . 12
4.1.6 Permanent joining. 13
4.2 Functional characteristics . 13
4.2.1 Application. 13
4.2.2 Design strength. 13
4.2.3 Flow characteristics . 13
4.2.4 Leak tightness. 14
5 Testing procedures. 14
5.1 Pressure tests . 14
5.2 Operability test. 15
5.3 Other tests . 15
6 Declaration of compliance . 15
7 Designation. 15
8 Marking and preparation for storage and transportation . 15
8.1 Marking . 15
8.2 Preparation for storage and transportation . 16
Annex A (informative) Information to be supplied by the purchaser. 17
Annex B (informative) Trim material list . 19
Annex C (informative) Environmental corrosion protection. 20
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 97/23/EC (PED) . 21
Bibliography . 22
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EN 593:2004 (E)
Foreword
This document (EN 593:2004) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”, the
secretariat of which is held by AFNOR.
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 August 2004 and conflicting national standards shall be withdrawn at
the latest by August 2004.
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.
This document supersedes EN 593:1998.
The informative annexes A, B and C can be used for practical application of this product standard.
This document includes a Bibliography.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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 the United Kingdom.
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EN 593:2004 (E)
1 Scope
This standard specifies requirements for butterfly valves having metallic bodies for use in flanged or butt
welding piping systems and used for isolating, regulating or control applications.
The PN and Class ranges are :
 PN 2,5 ; PN 6 ; PN 10 ; PN 16 ; PN 25 ; PN 40 ; Class 150 ; Class 300.
The DN range is :
 DN 20 ; DN 25 ; DN 32 ; DN 40 ; DN 50 ; DN 65 ; DN 80 ; DN 100 ; DN 125 ; DN 150 ; DN 200 ; DN 250 ;
DN 300 ; DN 350 ; DN 400 ; DN 450 ; DN 500 ; DN 600 ; DN 700 ; DN 750 ; DN 800 ; DN 900 ; DN 1000 ;
DN 1200 ; DN 1400 ; DN 1600 ; DN 1800 ; DN 2000 ; DN 2200 ; DN 2400.
DN 750 is used only for Class 150 and Class 300.
For special application as industrial process control valves, see EN 1349 and EN 60534-2-1.
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 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 19:2002, Industrial valves – Marking of metallic valves.
EN 287-1, Approval testing of welders – Fusion welding – Part 1 : Steels.
EN ISO 15607, Specification and qualification of welding procedures for metallic materials - Part 1: General
rules (ISO 15607:2003)
EN 558-1, Industrial valves – Face-to-face and centre-to-face dimensions of metal valves for use in flanged
pipe systems – Part 1 : PN-designated valves.
EN 558-2, Industrial valves – Face-to-face and centre-to-face dimensions of metal valves for use in flanged
pipe systems – Part 2 : Class-designated valves.
EN 736-1, Valves – Terminology – Part 1 : Definition of types of valves.
EN 736-2, Valves – Terminology – Part 2 : Definition of components of valves.
EN 736-3:1999, Valves – Terminology – Part 3 : Definition of terms.
EN 1092-1, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 1 : Steel flanges.
EN 1092-2, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 2 : Cast iron flanges.
EN 1092-3, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 3 : Copper alloy flanges.
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EN 593:2004 (E)
EN 1092-4, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 4 : Aluminium alloy flanges.
EN 1267, Valves – Test of flow resistance using water as test fluid.
EN 1418, Welding personnel – Approval testing of welding operators for fusion welding and resistance weld
setters for fully mechanized and automatic welding of metallic materials.
prEN 1759-1, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, Class
designated – Part 1: Steel flanges, NPS 1/2 to 24.
EN 1759-3, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, Class
designated – Part 3 : Copper alloy flanges.
EN 1759-4, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, Class
designated – Part 4: Aluminium alloy flanges.
EN 10269, Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties.
EN 12266-1:2003, Industrial valves – Testing of valves – Part 1 : Pressure tests, test procedures and
acceptance criteria – Mandatory requirements.
EN 12266-2, Industrial valves – Testing of valves – Part 2 : Tests, test procedures and acceptance criteria –
Supplementary requirements.
prEN 12516-1, Industrial valves – Shell design strength – Part 1: Tabulation method for steel valve shells.
prEN 12516-2, Industrial valves – Shell design strength – Part 2 : Calculation method for steel valve shells.
EN 12516-3, Valves – Shell design strength – Part 3 : Experimental method.
EN 12570, Industrial valves – Method for sizing the operating element.
EN 12627, Industrial valves – Butt welding ends for steel valves.
EN 12982, Industrial valves – End-to-end and centre-to-end dimensions for butt welding end valves.
EN 60534-2-3, Industrial-process control valves – Part 2-3 : Flow capacity – Test procedures (IEC 60534-2-
3:1997).
EN ISO 1043-1, Plastics – Symbols and abbreviated terms – Part 1: Basic polymers and their special
characteristics (ISO 1043-1:2001).
EN ISO 5211, Industrial valves – Part-turn valve actuator attachments (ISO 5211:2001).
ISO 1629, Rubber and lattices – Nomenclature.
ISO 10497, Testing of valves – Fire type-testing requirements.
ASME B1.1, Unified inch screw threads, UN and UNC thread form.
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 736-1, EN 736-2 and
EN 736-3 and the following apply.
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EN 593:2004 (E)
3.1
maximum allowable pressure, PS
maximum pressure for which the equipment is designed, as specified by the manufacturer
3.2
maximum allowable temperature, TS
maximum temperature for which the equipment is designed, as specified by the manufacturer
3.3
end of line service
condition that occurs when the downstream side of the valve is opened to atmosphere
3.4
driving shaft
shaft connected to the obturator to operate the valve in the case of a multi-shaft valve
3.5
double flanged butterfly valve
butterfly valve having double flanged body ends for connection to flanges of adjacent components by
individual bolting (see Figure 1)
Figure 1 — Double flanged body
3.6
wafer butterfly valve
butterfly valve intended for clamping between flanges of adjacent components
NOTE Different body shapes are possible (see Figures 2, 3 and 4).
Figure 2 — Flangeless wafer body
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EN 593:2004 (E)
Figure 3a — Valve with central lugs Figure 3b — Central single flange valve
Figure 3c — Valve with lugs with internally threaded Figure 3d — Single-flange valve with internally
holes threaded holes
Figure 3 — Single flange or lugged wafer body
Figure 4 — "U" section wafer body
3.7
butt welding end butterfly valve
butterfly valve intended for butt welding into a pipeline (see Figure 5)
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EN 593:2004 (E)
Figure 5 — Butt welding end body
3.8
trim
parts in contact with the fluid as defined in EN 736-2
4 Requirements
4.1 Design
4.1.1 Construction
4.1.1.1 General
The valve shall be of either concentric design (see Figure 6) or eccentric design (see Figure 7). The offset
may be single, double or triple.
Figure 6 — Concentric design Figure 7 — Eccentric design (example of double
offset design)
The design details are the responsibility of the manufacturer.
4.1.1.2 Body
Flanges of double flanged valves and single flange wafer valves shall have bolt holes in accordance with the
relevant standard as specified in 4.1.4.2. Threaded holes can be provided where the design of the valve
precludes through flange bolting.
Flangeless wafer valves (see Figure 2) are intended for clamping between pipe flanges using through bolting.
The shape of wafer valve bodies shall be such that centering of the valves within the appropriate flange bolt
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EN 593:2004 (E)
circle is ensured. Where through bolting is not practicable due to the valve design, e.g. close to shaft
passages, threaded holes can be provided for individual bolting.
Lugged or single flange wafer valves (see Figure 3) are supplied with threaded or through holes for installation
between two flanged components or at the end of a pipeline (i.e. end of line service or downstream
dismantling).
Threaded holes shall allow full thread engagement to a depth at least equal to the nominal bolt diameter and
at least 0,67 of the bolt diameter when the bolt hole is adjacent to the valve shaft.
For Class designed valves threaded body flange holes for bolts 1 inch or less in diameter shall be drilled and
tapped in accordance with ASME B1.1, UNC coarse thread series, Class 2B. For bolts 1 1/8 inches or more in
diameter, such holes shall be drilled and tapped in accordance with ASME B1.1, UN 8 eight thread series,
Class 2B. Threads according to other standards shall be specified.
The manufacturer's literature shall be consulted to determine if through bolting or/and end of line assembly is
possible. Any limitation regarding end of line service condition shall be indicated.
Elastomeric or plastic linings and liners can be extended over the flange faces of the body to form a gasket for
the flange.
4.1.1.3 Obturator (disc)
The valve manufacturer's technical documentation shall specify all necessary dimensions showing the
protrusion of the obturator in the open position beyond the faces of the valve.
4.1.1.4 Seat seal or body liner
The valve manufacturer's technical documentation shall specify whether the seat seal or body liner is
replaceable or non-replaceable.
4.1.1.5 Driving shaft
The external end of the driving shaft shall indicate the orientation of the obturator.
The shaft shall indicate by design or marking the position of the obturator. Where required by the design of
valve, the manufacturer's operating instructions shall specify the method to preserve the indication of the
obturator position, during and after re-assembly of the obturator to the shaft, e.g. for routine maintenance.
The sealing of the shaft shall remain leak tight to atmosphere when the operating device is removed.
The shaft shall be retained in the valve, so it cannot be ejected out of the body when external parts are
removed.
When anti-blow out design is required, it shall be in accordance with EN 736-3.
External parts as stated in 3.3.7 of EN 736-3:1999, are parts which are not included in the bare shaft valve
e.g. bracket, lever, actuator.
4.1.1.6 Other requirements
a) Fire type tested design : valves designated as fire type tested design shall be in accordance with
ISO 10497.
If valves are required to be a fire type tested design, this shall be specified (see annex A).
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EN 593:2004 (E)
b) Anti-static design : valves with anti-static design shall have electrical continuity between shaft, obturator
and body in accordance with EN 12266-2.
If valves are required to be an anti-static design, this requirement shall be specified (see annex A).
4.1.2 Materials
4.1.2.1 Shell
a) Body and cover : the steel alloy materials for the body and cover (if any) shall be selected from the
grades listed in prEN 12516-1.
NOTE For metallic materials other than steel, the body and cover (if any) materials should be selected from the
grades listed in prEN 12516-4.
b) Bolting : bolting material shall be selected from EN 10269.
4.1.2.2 Trim
The trim comprises the following :
a) obturator ;
b) shaft(s) ;
c) seat or liner.
The valve manufacturer's technical documentation shall specify the relevant materials for the trim parts (see
annex B).
The materials of seat and liner can be elastomeric, plastic, composite, metallic or a combination of these
materials.
The valve manufacturer's technical documentation shall specify the material type of the seat or liner.
4.1.2.3 Corrosion protection
a) External corrosion protection : valve shells shall be protected against corrosion by proper material
selection or surface treatment.
The valve manufacturer's technical documentation shall specify the choice of the materials and/or the
type of the surface treatment.
Surface treatment system may be chosen according to classification category given by annex C.
Test as
...