1、BRITISH STANDARD BS EN 1074-2:2000 Incorporating Amendments Nos. 1 and 2 Valves for water supply Fitness for purpose requirements and appropriate verification tests Part 2: Isolating valves The European Standard EN 1074-2:2000, with the incorporation of amendment A1:2004, has the status of a British
2、 Standard ICS 23.060.01; 91.140.60 BS EN 1074-2:2000 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 July 2000 BSI 23 December 2004 ISBN 0 580 35956 5 Nationa
3、l foreword This British Standard is the official English language version of EN 1074-2:2000, including amendment A1:2004. Together with BS EN 1074-1:2000, BS 5163-1:2004 and BS 5163-2:2004, this part of BS EN 1074 supersedes BS 5163:1986, which is withdrawn. The UK participation in its preparation w
4、as entrusted to Technical Committee PSE/7, Industrial valves, to Subcommittee PSE/7/3, Cast iron isolating, check and hydrant valves for industrial use and valves for water industry applications, which has the responsibility to: A list of organizations represented on this subcommittee can be obtaine
5、d on request to its secretary. Additional information To assist UK users of this standard, Subcommittee PSE/7/7 has produced BS 5163-1, a code of practice that provides guidance on the selection of gate valves for water distribution networks within the UK. The valves discussed are primarily for unde
6、rground use for waterworks purposes and for use with water intended for human consumption in the UK. This guidance is intended to help identify the most cost-effective way to procure suitable gate valves. The code takes account of the customs and practices developed in the UK water industry for the
7、operation of water distribution pipelines with particular attention to health and safety matters. The BS EN 1074 series of standards does not specify requirements for stem caps, which are required to satisfy UK operational practices. PSE/7/7 has therefore produced British Standard, BS 5163-2, which
8、covers stem caps for use on isolating valves and associated water control apparatus. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Corres
9、pondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not o
10、f itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments
11、 and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd.
12、No. Date Comments 15171 13 May 2004 Changes to C.2 15231 23 December 2004 National foreword amended EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1074-2 April 2000 + A1 April 2004 ICS 23.060.01 English version Valves for water supply Fitness for purpose requirements and appropriate verificati
13、on tests Part 2: Isolating valves (includes amendment A1:2004) Robinetterie pour lalimentation en eau Prescriptions daptitude lemploi et vrifications sy rapportant - Partie 2: Robinetterie de sectionnement (inclut lamendement A1:2004) Armaturen fr die Wasserversorgung Anforderungen an die Gebrauchst
14、auglichkeit und deren Prfung - Teil 2: Absperrarmaturen (enthlt nderung A1:2004) This European Standard was approved by CEN on 26 November 1999; amendment A1 was approved by CEN on 27 February 2004. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi
15、ons 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 of
16、ficial 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
17、, 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 STANDARDIZAT
18、ION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1074-2:2000 + A1:2004 EPage 2 EN 1074-2:2000 Contents F
19、oreword .3 Introduction.4 1 Scope4 2 Normative references4 3 Definitions 5 4 Design requirements.5 5 Performance requirements.5 5.1 Mechanical strength5 5.1.1 Resistance to internal pressure of the shell and of all pressure containing components5 5.1.2 Resistance of the obturator to differential pre
20、ssure5 5.1.3 Resistance of the valve to bending .5 5.1.4 Resistance of valves to operating loads.6 5.2 Leak-tightness .6 5.2.1 Leak-tightness of the shell and of all pressure containing components 6 5.2.2 Seat tightness7 5.2.3 Maximum operating torque (MOT) for operation and leak-tightness.7 5.2.4 L
21、eak-tightness of gearboxes to external pressure 8 5.3 Hydraulic characteristics8 5.4 Resistance to disinfection products8 5.5 Endurance 8 6 Conformity assessment8 6.1 General.8 6.2 Type tests.8 6.3 Control of production process and quality system .8 7 Marking.8 8 Packaging.9 Annex A (normative) Test
22、 method for the resistance of valves to operating loads (see 5.1.4) 10 Annex B (normative) Torque requirements for gate valves to be operated by ring key and bar (see 5.2.3 and annex A).11 Annex C (normative) Test method for the operation of valves (see 5.2.3) 12 Annex D (normative) Test method for
23、the endurance of valves (see 5.5) .13 Page 3 EN 1074-2:2000 Foreword This European Standard 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
24、 of an identical text or by endorsement, at the latest by October 2000, and conflicting national standards shall be withdrawn at the latest by October 2000. It consists of six parts: Part 1: General requirements Part 2: Isolating valves Part 3: Check valves Part 4: Air valves Part 5: Control valves
25、Part 6: Hydrants. Part 1, in conjunction with the subsequent parts, lays down the general requirements and test procedures to be carried out in production and during the assessment of conformity of these valves (type tests). The detailed requirements, which depend on the types of valves, are defined
26、 in parts 2 to 6 of this standard. The annexes A, B, C and D of this European Standard are normative. 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, De
27、nmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This document (EN 1074-2:2000/A1:2004) has been prepared by Technical Committee CEN/TC 69, Industrial valves, the S
28、ecretariat of which is held by AFNOR. This Amendment to the European Standard EN 1074-2:2000/A1:2004 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2004 and conflicting national standards shall be withdrawn at
29、the latest by October 2004. 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
30、, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Page 4 EN 1074-2:2000 Introduction In respect of potential adverse effects on the quality of water intended for human consumption caus
31、ed by the product covered by this standard: 1) This standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA. 2) It should be noted that, while awaiting the adoption of verifiable European criteria, existing national reg
32、ulations concerning the use and/or the characteristics of this product remain in force. 1 Scope This European Standard defines the minimum fitness for purpose requirements for isolating valves to be used in, or connected to, water supply pipe systems, above or below ground (see EN 805), carrying wat
33、er intended for human consumption. This standard specifies the design requirements, the performance requirements, and the conformity assessment method for isolating valves, whatever their type and materials. This standard applies in priority to any other product or test standard: the requirements fr
34、om other standards apply only when this standard refers to them. This part of the standard deals with the requirements applicable to isolating valves up to DN 2 000 and PFA 6 bar to PFA 25 bar. 2 Normative references This European Standard incorporates, by dated or undated references, provisions fro
35、m 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 amendme
36、nt or revision. For undated references the latest edition of the publication referred to applies. EN 736-1, Valves - Terminology - Part 1: Definition of the types of valves. EN 736-3, Valves - Terminology - Part 3: Definition of terms. EN 1074-1, Valves for water supply - Fitness for purpose require
37、ments and appropriate verification tests - Part 1: General requirements. EN 1267, Valves - Test of flow resistance using water as test fluid. EN 805, Water supply - Requirements for systems and components outside buildings. prEN 12570:1999, Industrial Valves - Permissible manual forces for operation
38、 of valves. Page 5 EN 1074-2:2000 3 Definitions For the purpose of this standard, the definitions of EN 1074-1 apply, together with the following definitions: 3.1 flow coefficient K V : Coefficient equal to the flow rate, in cubic metres per hour, of water at a temperature between 5 C and 40 C, pass
39、ing through the valve and causing a loss of static head of 1 bar (EN 736-3). 3.2 isolating valve: Valve intended for use only in the closed or fully open position (EN 736-1). 3.3 full bore valve: Valve with a seat diameter not less than 90 % of the internal nominal diameter of the body end port (EN
40、736-3). 3.4 clear way valve: Valve designed to have an unobstructed flow way which allows the passage of a theoretical sphere with a diameter which is not less than the nominal inside diameter of the body end port (EN 736-3). 4 Design requirements Isolating valves shall be designed in accordance wit
41、h the requirements given in clause 4 of EN 1074-1. 5 Performance requirements 5.1 Mechanical strength 5.1.1 Resistance to internal pressure of the shell and of all pressure containing components Requirement and test shall be in accordance with 5.1.1 of EN 1074-1. 5.1.2 Resistance of the obturator to
42、 differential pressure Requirement and test shall be in accordance with 5.1.2 of EN 1074-1. Except for valves to be used for a single flow direction, the test shall be performed successively in each flow direction. 5.1.3 Resistance of the valve to bending Requirement and test shall be in accordance
43、with 5.1.3 of EN 1074-1, for sizes DN 50 up to and including DN 500. The bending moments M to be applied during the test are given in table 1 as a function of DN. Page 6 EN 1074-2:2000 Table 1 - Bending moments DN M Nm 50 1 050 65 1 400 80 1 500 100 2 200 125 3 200 150 4 800 200 7 200 250 11 000 300
44、 15 000 350 19 000 400 24 000 450 28 000 500 33 000 5.1.4 Resistance of valves to operating loads Requirement shall be in accordance with 5.1.4 of EN 1074-1. When, in order to verify this requirement, a valve in its delivery state has been subjected to a test in accordance with annex A, with the app
45、lication of a closing torque and an opening torque equal to mST, it shall pass the operating tests in accordance with 5.2.3 and the seat tightness tests in accordance with 5.2.2.1 and 5.2.2.2. The minimum strength torque mST shall be equal to twice the maximum operating torque (MOT) given in 5.2.3.
46、In the case of gate valves in accordance with 5.2.3 c), the torque mST to be applied in the test in accordance with annex A shall be equal to 5 times MOT. In the case of valves in accordance with 5.2.3 d), the test is only applicable when there is an additional manual operating element. 5.2 Leak-tig
47、htness 5.2.1 Leak-tightness of the shell and of all pressure containing components 5.2.1.1 Leak-tightness to internal pressure Requirement and test shall be in accordance with 5.2.1.1 of EN 1074-1. 5.2.1.2 Leak-tightness to external pressure Requirement and test shall be in accordance with 5.2.1.2 o
48、f EN 1074-1. Page 7 EN 1074-2:2000 5.2.2 Seat tightness 5.2.2.1 Seat tightness at high differential pressure Requirement and test shall be in accordance with 5.2.2.1 of EN 1074-1. After closing the valve by application of MOT (see 5.2.3), the leakage rate shall be rate A for resilient seated valves
49、and shall not exceed rate B for metallic seated valves. For a type test, the test duration shall be not less than 10 min. Except for valves to be used in a single flow direction, the test shall be performed successively in each flow direction. 5.2.2.2 Seat tightness at low differential pressure Requirement and test shall be in accordance with 5.2.2.2 of EN 1074-1, with the torque, the leakage rate and the test duration given in 5.2.2.1. Except for valves to be used
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