SIST EN 593:2018

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Industrijski ventili - Kovinske zaporne lopute za splošno uporaboIndustriearmaturen - Metallische Klappen für den allgemeinen GebrauchRobinetterie industrielle - Robinets métalliques à papillon d'usage généralIndustrial valves - Metallic butterfly valves for general purposes23.060.30Zapirni ventili (zasuni)Gate valvesICS:Ta slovenski standard je istoveten z:EN 593:2017SIST EN 593:2018en01-januar-2018SIST EN 593:2018SLOVENSKI
STANDARDSIST EN 593:2009+A1:20141DGRPHãþD



SIST EN 593:2018



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 593
October
t r s y ICS
t uä r x rä u r Supersedes EN
w { uã t r r { ªA sã t r s sEnglish Version
Industrial valves æ Metallic butterfly valves for general purposes Robinetterie industrielle æ Robinets métalliques à papillon d 5usage général
Industriearmaturen æ Metallische Klappen für den allgemeinen Gebrauch This European Standard was approved by CEN on
u s August
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
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CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
w { uã t r s y ESIST EN 593:2018



EN 593:2017 (E) 2 Contents Page European foreword . 4 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 7 4 Design requirements . 8 4.1 General . 8 4.2 Shell . 10 4.3 Body . 10 4.4 Obturator (disc) . 13 4.5 Seat seal . 13 4.6 Driving shaft . 13 4.7 Shaft seal . 14 4.8 Optional design features . 14 4.9 Materials . 15 4.10 Pressure/temperature ratings . 16 4.11 Dimensions and tolerances . 17 4.12 Operation . 17 4.13 Permanent joining . 19 4.14 Functional characteristics and performances . 19 5 Final assessment . 20 5.1 General . 20 5.2 Additional tests . 21 6 Designation. 21 7 Marking and preparation for storage and transportation . 21 7.1 Marking . 21 7.2 Preparation for storage and transportation . 22 Annex A (informative)
Information to be supplied by the customer . 23 Annex B (informative)
Trim material list . 25 Annex C (informative)
Environmental corrosion protection . 26 Annex D (informative)
Correspondence between DN and NPS . 27 Annex E (informative)
Example for valve shaft calculation . 29 E.1 General . 29 E.2 Calculation . 30 E.2.1 Shear stress . 30 E.2.2 Combined shear stress (at valve bearing) (section 2-2) . 30 E.2.3 Combined tensile stress at seating due to torsion and bending (section 2-2) . 30 E.2.4 Shear stress at reduced area (sections 1-1, 3-3, 4-4) . 31 E.3 Examples of influence of flow velocity/hydrodynamic torques for shaft sizing . 31 SIST EN 593:2018



EN 593:2017 (E) 3 Annex ZA (informative)
Relationship between this European Standard and the essential requirements of Directive 2014/68/EU (Pressure Equipment Directive) aimed to be covered . 34 Bibliography . 35
SIST EN 593:2018



EN 593:2017 (E) 4 European foreword This document (EN 593:2017) 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 April 2018, and conflicting national standards shall be withdrawn at the latest by April 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 593:2009+A1:2011. 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 2014/68/EU. For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document. The main technical changes compared to the previous edition are: a) the extension of the dimensions to cover PN 2,5 to PN 160, Class 150 to Class 900 and DN 20 to DN 4 000; b) the inclusion of single, double and triple eccentric designs; c) a reference to EN 16668 for valves subject to European legislation on pressure equipment; d) the addition of informative Annex D giving the correspondence between DN and NPS; e) the addition of informative Annex E on valve torque curves at different flow velocities; f) the updating of Annex ZA according to the new PED. 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 593:2018



EN 593:2017 (E) 5 1 Scope This European Standard specifies minimum general requirements for butterfly valves having metallic bodies for use with all type of pipe end connections (e.g. wafer, lug, flange, butt welding) 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; PN 63; PN 100; PN 160; — Class 150; Class 300; Class 600; Class 900. The size 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 1 000; DN 1 050; DN 1 100; DN 1 200; DN 1 400; DN 1 500; DN 1 600; DN 1 800; DN 2 000; DN 2 200; DN 2 400; DN 2 600; DN 2 800; DN 3 000; DN 3 200; DN 3 400; DN 3 600; DN 3 800; DN 4 000. DN 750 and DN 1 050 are used only for Class 150 and Class 300. Intermediate DNs are allowed upon agreement between manufacturer and customer. For valves subject to European legislation on pressure equipment, EN 16668 applies together with this European Standard. For industrial process control valves, EN 1349 and EN 60534-2-1 apply together with this European Standard. For water supply application, EN 1074-1 and EN 1074-2 apply together with this European Standard. NOTE 1 Butterfly valves for water supply application do not comply with Annex ZA and are not CE marked because they are excluded from the pressure equipment European legislation. NOTE 2 The range of DN, applicable to each PN, for wafer and wafer lug valve types is as given in the appropriate part of EN 1092 for Type 11 flanges for the applicable material. The range of DN, applicable to each PN, for flanged valve types is as given in the appropriate part of EN 1092 for Type 21 flanges for the applicable material. The correspondence between DN and NPS is given for information in Annex D. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 19:2016, Industrial valves — Marking of metallic valves EN 558:2017, Industrial valves — Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems — PN and Class designated valves EN 736-1:1995, Valves — Terminology — Part 1: Definition of types of valves EN 736-2:2016, Valves — Terminology — Part 2: Definition of components of valves EN 736-3:2008, Valves — Terminology — Part 3: Definition of terms EN 1074-2:2000, Valves for water supply — Fitness for purpose requirements and appropriate verification tests — Part 2: Isolating valves SIST EN 593:2018



EN 593:2017 (E) 6 EN 1092-1:2007+A1:2013, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges EN 1092-2:1997, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 2: Cast iron flanges EN 1092-3:2003, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 3: Copper alloy flanges EN 1092-4:2002, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 4: Aluminium alloy flanges EN 1267:2012, Industrial valves — Test of flow resistance using water as test fluid EN 1759-1:2004, Flanges and their joint — Circular flanges for pipes, valves, fittings and accessories, Class designated — Part 1: Steel flanges, NPS 1/2 to 24 EN 1759-3:2003, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, Class designated — Part 3: Copper alloy flanges EN 1759-4:2003, Flanges and their joint — Circular flanges for pipes, valves, fittings and accessories, class designated — Part 4: Aluminium alloy flanges EN 10269:2013, Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties EN 12266-1:2012, Industrial valves — Testing of metallic valves — Part 1: Pressure tests, test procedures and acceptance criteria — Mandatory requirements EN 12266-2:2012, Industrial valves — Testing of metallic valves — Part 2: Tests, test procedures and acceptance criteria — Supplementary requirements EN 12516-1:2014, Industrial valves — Shell design strength — Part 1: Tabulation method for steel valve shells EN 12516-2:2014, Industrial valves — Shell design strength — Part 2: Calculation method for steel valve shells EN 12516-3:2002, Valves — Shell design strength — Part 3: Experimental method EN 12516-4:2014, Industrial valves — Shell design strength — Part 4: Calculation method for valve shells manufactured in metallic materials other than steel EN 12570:2000, Industrial valves — Method for sizing the operating element EN 12627:1999, Industrial valves — Butt welding ends for steel valves EN 12982:2009, Industrial valves — End-to-end and centre-to-end dimensions for butt welding end valves EN 16668:2016, Industrial valves — Requirements and testing for metallic valves as pressure accessories EN 60534-2-3:2016, Industrial-process control valves — Part 2-3: Flow capacity — Test procedures (IEC 60534-2-3:2015) EN ISO 1043-1:2011, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special characteristics (ISO 1043-1:2011) EN ISO 5211:2017, Industrial valves — Part-turn actuator attachments (ISO 5211:2017) SIST EN 593:2018



EN 593:2017 (E) 7 EN ISO 9606-1:2017, Qualification testing of welders — Fusion welding — Part 1: Steels (ISO 9606-1:2012 including Cor 1:2012 and Cor 2:2013) EN ISO 10497:2010, Testing of valves — Fire type-testing requirements (ISO 10497:2010) EN ISO 14732:2013, Welding personnel — Qualification testing of welding operators and weld setters for mechanized and automatic welding of metallic materials (ISO 14732:2013) EN ISO 15607:2003, Specification and qualification of welding procedures for metallic materials — General rules (ISO 15607:2003) ISO 1629:2013, Rubber and latices — Nomenclature ASME B1.1:2003, Unified Inch Screw Threads, (UN and UNR Thread Form) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 736-1, EN 736-2, EN 736-3 and the following apply. 3.1 maximum allowable pressure PS maximum pressure for which the pressure equipment is designed as specified by the manufacturer [SOURCE: EN 764-1:2015+A1:2016, 3.2.87] 3.2 maximum allowable temperature TSmax maximum temperature for which the pressure equipment is designed as specified by the manufacturer [SOURCE: EN 764-1:2015+A1:2016, 3.1.9] 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 trim parts in contact with the fluid 3.6 eccentration offset deviation of the operating axes in respect to the reference axes of the pipe/valve SIST EN 593:2018



EN 593:2017 (E) 8 4 Design requirements 4.1 General Valves subject to pressure equipment European legislation shall comply with the requirements of EN 16668. The valve shall be of either concentric design (see Figure 1) or eccentric design (see Figures 2 to 4). The offset may be single, double or triple. A first offset is an axial offset of the shaft to the seat contact. A second offset is an offset from the pipe centreline to the valve obturator centerline. In the triple offset design, the seat and seal contact surface centreline is inclined in respect to the pipe / valve centreline, whatever the form of the contact.
Figure 1 — Concentric design
Key e1 eccentricity 1 Figure 2 — Single eccentric design (single offset) SIST EN 593:2018



EN 593:2017 (E) 9
Key e1 eccentricity 1 e2 eccentricity 2 Figure 3 — Double eccentric design (double offset)
Key e1 eccentricity 1 e2 eccentricity 2 e3 eccentricity 3 Figure 4 — Triple eccentric design (triple offset) The design details are the responsibility of the manufacturer. The butterfly valve may be: — soft sealing; or — metallic sealing. NOTE The choice of design and material depends on the design working temperature and the physical and chemical characteristics of the fluid. SIST EN 593:2018



EN 593:2017 (E) 10 4.2 Shell The shell is the combination of all pressure retaining part: — the body, — the retaining elements of the shaft seal ring or the stuffing box; — the cover and the cover bolting if any, — if used as end of line, the obturator and the shaft. 4.3 Body 4.3.1 General Flanges of double flanged valves and single flange wafer valves shall have bolt holes in accordance with the relevant standard as specified in 4.11.2. Threaded holes can be provided where the design of the valve precludes through flange bolting. Flangeless wafer valves (see Figure 6) are intended for clamping between pipe flanges using through bolting. The shape of wafer valve bodies shall be such that centring of the valves within the appropriate flange bolt 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 7) 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. 4.3.2 End connections End connections shall be either one of the following. a) Double flanged butterfly valve: butterfly valve having double flanged body ends for connection to flanges of adjacent components by individual bolting (see Figure 5). b) Wafer butterfly valve: butterfly valve intended for clamping between flanges of adjacent components. NOTE Different body shapes are possible: see Figures 6 and 7 a) to g). c) Butt welding end butterfly valve: butterfly valve intended for butt welding into a pipeline (see Figure 8). SIST EN 593:2018



EN 593:2017 (E) 11 d) Mechanical connection for loose flange connection: butterfly valve with one or both loose flanges for compensation of piping alignment (see Figure 9). The loose flange shall be pullout proof. e) Mechanical connection: butterfly valve with one or two interfaces for connection of piping (see Figures 10 and 11). The connection shall be spigot end or socket end. Requirements and test methods of mechanical joints are described in EN 545. The connection may be pullout proof.
Figure 5 — Double flanged body Figure 6 — Flangeless wafer body SIST EN 593:2018



EN 593:2017 (E) 12
a) Valve with central lugs b) Central single flange valve
c) Valve with lugs with internally threaded holes d) Single-flange valve with internally threaded holes
e) Valve with lugs with drilled holes f) Single-flange valve with drilled holes
g) Valve with U-section Figure 7 — Wafer valve bodies bolting configurations SIST EN 593:2018



EN 593:2017 (E) 13
Figure 8 — Butt welding end body
Figure 9 — Loose-flange design Figure 10 — Socket-socket design Figure 11 — Spigot-socket design 4.4 Obturator (disc) The obturator (often named disc) can be with or without seal. 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. 4.5 Seat seal In its technical documentation, the valve manufacturer shall specify whether the seat seal — is a body liner by design, or — is located in the body or on the obturator. The liner/lining may have additional functions, including sealing the driving shaft and flange. The valve documentation shall specify the seat materials and if the sealing element is replaceable or not. 4.6 Driving shaft The external end of the driving shaft shall indicate the orientation of the obturator. The choice of the shaft material depends on the design working temperature and the physical and chemical characteristics of the fluid. Valve shafts shall be sized for the maximum design torque at seating operation and at obturator position of highest combined dynamic and bearing torques with a safety factor. The value of this safety factor depends on the calculation method of the driving shaft. An example of calculation method is given in Annex E. SIST EN 593:2018



EN 593:2017 (E) 14 The connection between the shaft and the obturator shall be designed to transmit the shaft torque with the same safety factor. Higher flow velocities than defined in Table 1 may cause higher dynamic torques (see examples in Annex E). The outside end of 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. It shall be in accordance with EN 736-3. External parts as stated in EN 736-3:2008, 3.3.7, are parts which are not included in the bare shaft valve e.g. bracket, lever, actuator. 4.7 Shaft seal The shaft seal tightness shall remain unchanged when the actuating device is removed. The shaft seal is not part of the shell. 4.8 Optional design features a) Fire type tested design: valves designated as fire type tested design shall be tested in accordance with EN ISO 10497. If valves are required to be a fire type tested design, this requirement shall be specified (see Annex A). 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). c) Valves may be designed with a blocking device of the shaft which fixes the open or close position for maintenance purposes of the gearbox by an external blocking device. See Figure 12. d) Valves may be designed with a blocking device which fixes the obturator in closed and tight position independently of the function of the actuator. The blocking device acts as a safety device. See Figure 13. SIST EN 593:2018



EN 593:2017 (E) 15
Key 1 external blocking device Figure 12 — Blocking device of the shaft
Figure 13 — Blocking device of the obturator 4.9 Materials 4.9.1 Shell Materials for the shell shall be selected from those described in EN 12516-1, EN 12516-3 and EN 12516-4. Bolting material shall be selected from EN 10269. 4.9.2 Trim The trim comprises the following: a) body or obturator seats; b) shaft and seat seals; c) shafts; d) bushes; SIST EN 593:2018



EN 593:2017 (E) 16 e) shaft/obturator connecting parts; f) seat/obturator seal clamping rings; g) clamping ring bolting; h) body lining/coating; i) obturator linings/coatings. The technical documentation of the valve manufacturer shall specify the relevant materials for the trim parts (see Annex B). The materials of seat and seal can be elastomeric, plastic, composite, graphite, metallic or a combination of these materials. The valve manufacturer's technical documentation shall specify the material type of the seat or liner or seal. 4.9.3 Corrosion protection The choice of materials and/or surface protection methods used shall be included in the manufacturer's technical documentation and may be subject to agreement with the customer. a) External corrosion protection: valve shells shall be protected against corrosion by proper material selection or surface treatment. Surface treatment system may be chosen according to classification category given by Annex C or agreed between customer and manufacturer. Test assessment and test procedures are the responsibility of the manufacturer. b) Internal corrosion protection: all surfaces in contact with the fluid shall be protected against corrosion by suitable material selection or surface treatment (see Annex B) or agreed between customer and manufacturer. 4.10 Pressure/temperature ratings The pressure/temperature rating shall be as specified in: a) steel materials: EN 12516-1:2014 for the particular body/bonnet material group; b) cast iron materials: EN 1092-2:1997; c) copper alloy materials: EN 1092-3:2003 for PN-designated valves; EN 1759-3:2003 for Class-designated flanged valves; d) aluminium alloys: EN 1092-4:2002 for PN-designated valves; EN 1759-4:2003 for Class-designated flanged valves. Where restrictions on pressure and/or temperature are necessary on valves by reason of valve type, trim materials or other factors, the maximum allowable pressure and/or temperature shall be marked on the valve (in accordance with 7.1.2) and shall be considered with the designation of the valve [in accordance with Clause 6 i)]. It is recommended that the service conditions under which a butterfly valve is to be used should be specified by the customer (see Annex A). SIST EN 593:2018



EN 593:2017 (E) 17 4.11 Dimensions and tolerances 4.11.1 Face-to-face and end-to-end dimensions The face-to-face dimensions and tolerances for flanged and wafer type butterfly valves shall be selected from EN 558 for PN- and Class-designated valves. The end-to-end dimensions and tolerances for butt welding end butterfly valves shall be selected from EN 12982. The face-to-face or end-to-end dimension for DN lower or larger than those defined in EN 558 or EN 12982 shall be specified by the manufacturer. For spigot and mechanical joint, the end-to-end dimensions may be according to the manufacturer's technical documentation. For loose flange connection, the end-to-end dimensions may be according to EN 558, series 14, but with a higher length tolerance for pipe assembling. 4.11.2 Flange body ends Flanged ends shall be in accordance with: a) EN 1092-1, EN 1092-2, EN 1092-3 and EN 1092-4 for PN designated butterfly valves; b) EN 1759-1, EN 1759-3 and EN 1759-4 for Class designated butterfly valves. 4.11.3 Wafer bodies Flangeless, lugged or single flanged bodies shall be such that they can be clamped between flanges in accordance with: a) EN 109
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