1、BSI Standards PublicationBS EN 1171:2015Industrial valves Cast irongate valvesBS EN 1171:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 1171:2015. Itsupersedes BS EN 1171:2002.The UK participation in its preparation was entrusted to TechnicalCommittee PSE/
2、18/2, Industrial valves, steam traps, actuators andsafety devices against excessive pressure - Gate, globe, diaphragmand check valves.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisi
3、ons of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82962 8ICS 23.060.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published un
4、der the authority of theStandards Policy and Strategy Committee on 31 October 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 1171:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1171 September 2015 ICS 23.060.30 Supersedes EN 1171:2002English Version In
5、dustrial valves - Cast iron gate valves Robinetterie industrielle - Robinets-vannes en fonte Industriearmaturen - Schieber aus Gusseisen This European Standard was approved by CEN on 1 August 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditio
6、ns 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-CENELEC Management Centre or to any CEN member. This European Standard exists in
7、 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-CENELEC Management Centre has the same status as the official versions. CEN members are the national standard
8、s bodies of 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, Slovakia, Sloven
9、ia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved w
10、orldwide for CEN national Members. Ref. No. EN 1171:2015 EBS EN 1171:2015EN 1171:2015 (E) 2 Contents Page European foreword 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions 5 4 Requirements 5 4.1 Design . 5 4.1.1 Materials 5 4.1.2 Pressure/temperature ratings 6 4.1.3 Dimensions . 7 4
11、.1.4 Operation 9 4.2 Functional characteristics 11 4.2.1 Shell design strength 11 4.2.2 Flow characteristics . 12 4.2.3 Seat tightness 12 4.2.4 Sizing the operating element 12 4.3 Strength torque 12 5 Test procedures . 13 6 Declaration of compliance . 13 7 Designation 13 8 Marking, preparation for s
12、torage and transportation 14 8.1 Marking . 14 8.2 Preparation for storage and transportation . 14 Annex A (informative) Information to be supplied by the customer 15 Annex B (normative) Strength torque test. 16 Annex C (normative) Equivalence between EN and ISO cast iron material grades 17 Annex ZA
13、(informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC 18 Bibliography 19 BS EN 1171:2015EN 1171:2015 (E) 3 European foreword This document (EN 1171:2015) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”, the secretaria
14、t 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 March 2016, and conflicting national standards shall be withdrawn at the latest by March 2016. Attention is drawn to th
15、e 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. This document supersedes EN 1171:2002. This document has been prepared under a mandate given to CEN by the Eur
16、opean Commission and the European Free Trade Association, and supports essential requirements of EU Directive 97/23/EC (PED). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. In this new edition, the following modifications were made: the n
17、ormative references were updated in Clause 2 and throughout the text; 4.1.1, 4.1.2.1, 4.1.2.3, 4.2.1, 8.1, Annex C and Table ZA.1 were revised to be in compliance with EU Directive 97/23/EC (PED). According to the CEN-CENELEC Internal Regulations, the national standards organizations of the followin
18、g 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, Norw
19、ay, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 1171:2015EN 1171:2015 (E) 4 1 Scope This European Standard specifies the requirements for cast iron gate valves with flanged ends, socket ends or spigot ends. This European Standard is
20、 applicable to cast iron gate valves mainly used for industrial and general-purpose applications. However, they can be used for other applications provided the requirements of the relevant performance standards are met. The range of nominal sizes covered is: DN 40 ; DN 50 ; DN 65 ; DN 80 ; DN 100 ;
21、DN 125 ; DN 150 ; DN 200 ; DN 250 ; DN 300 ; DN 350 ; DN 400 ; DN 450 ; DN 500 ; DN 600 ; DN 700 ; DN 800 ; DN 900 ; DN 1 000. The range of pressure designations covered is: isobaric PN 6; PN 10; PN 16; PN 25; isomorphic, PS 10 bar to PS 1 bar at room temperature. 2 Normative references The followin
22、g 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 19:2002, Industr
23、ial valves Marking of metallic valves EN 545:2010, Ductile iron pipes, fittings, accessories and their joints for water pipelines Requirements and test methods EN 558, Industrial valves Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems PN and Class designated
24、 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, Valves Terminology Part 3: Definition of terms EN 1092-2:1997, Flanges and their joints Circular flanges for pipes, valves, fittings and access
25、ories, PN designated Part 2: Cast iron flanges EN 12266-1, Industrial valves Testing of metallic valves Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements EN 12266-2, Industrial valves Testing of metallic valves Part 2: Tests, test procedures and acceptance crit
26、eria - Supplementary requirements EN 12351, Industrial valves Protective caps for valves with flanged connections 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 manufacture
27、d in metallic materials other than steel BS EN 1171:2015EN 1171:2015 (E) 5 EN 12570, Industrial valves Method for sizing the operating element EN ISO 5210, Industrial valves Multi-turn valve actuator attachments (ISO 5210) ISO 185:2005, Grey cast irons Classification ISO 1083:2004, Spheroidal graphi
28、te cast irons Classification ISO 2531:2009, Ductile iron pipes, fittings, accessories and their joints for water applications ISO 5922:2005, Malleable cast iron 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 736-1, EN 736-2 and EN 736-3 and the follo
29、wing apply. NOTE The terms maximum allowable pressure, PS, and test pressure, PT, defined in EU Directive 97/23/EC (PED) are equivalent to the terms allowable pressure, ps, and test pressure, pt, defined in EN 7363. 3.1 isomorphic series series of cast iron gate valves of a specified type and design
30、 having maximum allowable pressures which tend to decrease as the nominal size increases (see Table 2) and having specific flanged end connections (see 4.1.3.2.1) 3.2 isobaric series series of cast iron gate valves of a specified type and design having the same maximum allowable pressure for all nom
31、inal sizes 3.3 strength torque torque applied directly to the operating mechanism or, when fitted, the operating device, which the valve is capable of withstanding 4 Requirements 4.1 Design 4.1.1 Materials 4.1.1.1 The body and bonnet materials shall be selected from Table 1 and designed in accordanc
32、e with EN 12516-4:2014. NOTE Materials listed in Table 1 comply with the requirements of EN 1561 for grey cast iron, EN 1562 for malleable cast iron and EN 1563 for spheroidal graphite cast iron. BS EN 1171:2015EN 1171:2015 (E) 6 Table 1 Body and bonnet materials Graphite structure European Standard
33、 Designation short name Grey cast iron EN 125164:2014 EN-GJL-200 EN 125164:2014 EN-GJL-250 Spheroidal graphite cast iron EN 125164:2014 EN-GJS-350-22-LT EN 125164:2014 EN-GJS-35022-RT EN 125164:2014 EN-GJS-40018-LT EN 125164:2014 EN-GJS-40018-RT EN 125164:2014 EN-GJS-40015 EN 125164:2014 EN-GJS-5007
34、 EN 125164:2014 EN-GJS-6003 Malleable cast iron EN 125164:2014 EN-GJMB-3006 EN 125164:2014 EN-GJMB-35010 4.1.1.2 The body and bonnet materials may also be spheroidal graphite cast iron in accordance with the requirements of EN 545:2010, 4.4. 4.1.1.3 All the internal parts in contact with the fluid s
35、hall be made of a material whose corrosion resistance to the fluid being carried is at least equal to the body and bonnet material. 4.1.1.4 Trim materials shall have a chemical composition and mechanical properties, which ensure the mechanical integrity of the valve and shall be stated in the manufa
36、cturers technical documentation. The trim comprises the following: a) stem; b) obturator seat; c) body seat; d) back seat (for valves DN 50 and above, when fitted). 4.1.1.5 Welding and impregnation of castings of all materials are not permitted. 4.1.2 Pressure/temperature ratings 4.1.2.1 Isobaric se
37、ries The pressure/temperature ratings shall be in accordance with EN 1092-2:1997 for the equivalent ISO material grade except that valves with metallic seats shall not be used above 230 C and valves with soft seats shall not be used above 70 C. To determine the equivalent ISO material grades for the
38、 EN material grades specified in Table 1, refer to Annex C. 4.1.2.2 Isomorphic series The pressure/temperature ratings shall be as given in Table 2. BS EN 1171:2015EN 1171:2015 (E) 7 Table 2 Pressure/temperature ratings for isomorphic series DN Maximum allowable pressure PS (bar) at 10 C/120 C 150 C
39、 180 C 200 C 230 C 40 to 80 10,0 9,0 8,4 8,0 7,4 100 125 150 200 250 6,0 5,4 5,0 4,8 4,4 300 350 4,0 3,6 3,4 3,2 3,0 400 450 500 600 2,5 2,3 2,1 2,0 1,9 700 800 1,6 1,4 1,3 1,3 1,2 900 1,0 0,9 0,8 0,8 0,7 1 000 4.1.2.3 For TS - 10 C, the body and bonnet material grades shall be EN-GJS-350-22-LT or E
40、N-GJS-400-18-LT. In this case, the TS minimum shall be not less than the temperature specified in EN 12516-4:2014, Table 7. 4.1.3 Dimensions 4.1.3.1 Face-to-face and end-to-end dimensions The face-to-face dimensions of flanged valves shall be in accordance with the basic series given in Table 3. Tab
41、le 3 Basic series of face-to-face dimensions Series DN Basic series (according to EN 558) Isomorphic 40 to 1 000 14 PN 6, PN 10, PN 16 40 to 500 14 40 to 1 000 3, 15, 29, 30 PN 25 40 to 600 19, 4, 15, 26 40 to 400 45 The end-to-end dimensions of valves with socket or spigot ends are given in the man
42、ufacturers technical documentation. BS EN 1171:2015EN 1171:2015 (E) 8 4.1.3.2 Body ends 4.1.3.2.1 General The manufacturers technical documentation shall indicate the type and dimensions of valve body ends, and reference to the relevant European Standard. 4.1.3.2.2 Flange end connections Flanges sha
43、ll be in accordance with EN 1092-2. Flanges can be an integral part of the valve body or adjustable flanges on a collar. Flanges, which are an integral part of the body, may have supports, which permit a stable installation of the valve. For isomorphic gate valves, the flange facing and mating dimen
44、sions shall be PN 10. 4.1.3.2.3 Spigot end connections Spigot ends shall be compatible with the adjacent piping. 4.1.3.2.4 Socket end connections The socket ends shall be compatible with the adjacent piping. They may have a seal housing with clearance to allow angular displacement after assembly. 4.
45、1.3.3 Body end port inside diameter The body end port shall be circular. For unlined valves, the body end port inside diameter shall be not less than the nominal inside diameter specified in Table 4. For isomorphic gate valves the dimensions for PN 10 shall be used. BS EN 1171:2015EN 1171:2015 (E) 9
46、 Table 4 Nominal inside diameter of the body end port Dimensions in millimetres DN PN 6, PN 10 PN 16 PN 25 40 40 40 38 50 50 50 50 65 63 63 63 80 78 78 76 100 100 100 100 125 125 125 125 150 150 150 150 200 200 200 200 250 250 250 250 300 300 300 300 350 343 343 336 400 394 394 387 450 445 445 438 5
47、00 495 495 488 600 597 597 590 700 695 695 692 800 800 793 788 900 900 889 889 1 000 1 000 991 991 4.1.4 Operation 4.1.4.1 Maximum height The maximum height of gate valves without gearbox, actuator or position indicator (see Figure 1), shall be as given in Table 5. BS EN 1171:2015EN 1171:2015 (E) 10
48、 a) Valve with non-rising stem b) Valve with rising stem (in fully open position) Figure 1 Valve BS EN 1171:2015EN 1171:2015 (E) 11 Table 5 Maximum height Dimensions in millimetres DN h1 h2 40 350 480 50 400 510 65 425 560 80 475 610 100 575 720 125 650 875 150 700 950 200 850 1 200 250 1 025 1 440
49、300 1 125 1 675 350 1 150 1 900 400 1 275 2 070 450 1 350 2 250 500 1 500 2 430 600 1 700 2 850 700 1 800 3 250 800 2 000 3 750 900 2 400 4 150 1 000 2 500 4 450 4.1.4.2 Operating device If the valve is to be operated by an actuator then the valve/actuator attachment shall be in accordance with EN ISO 5210. 4.1.4.3 Operating direction The valve shall be closed by turning the handwheel in a clockwise direction when viewed from above the top of the valve. 4.2 Functional
