1、BSI Standards PublicationBS EN 331:2015Manually operated ball valvesand closed bottom taper plugvalves for gas installations forbuildingsBS EN 331:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 331:2015. It supersedes BS EN 331:1998+A1:2010 which is withdr
2、awn.The UK participation in its preparation was entrusted to Technical Committee GSE/42, Gas fittings and connections including metal hose and hose assemblies.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to includ
3、e all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82225 4 ICS 23.060.20 Compliance with a British Standard cannot confer immunity from legal obligations.This Br
4、itish Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 331:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 331 December 2015 ICS 23.060.20 Supersedes
5、EN 331:1998English Version Manually operated ball valves and closed bottom taper plug valves for gas installations for buildings Robinets tournant sphrique et robinets tournant conique fond plat destins tre manoeuvrs manuellement et tre utiliss pour les installations de gaz dans les btiments Handbet
6、tigte Kugelhhne und Kegelhhne mit geschlossenem Boden fr die Gas-Hausinstallation This European Standard was approved by CEN on 24 October 2015. 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
7、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 three official versions (English, French, German). A
8、 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 standards bodies of Austria, Belgium, Bulgaria, Croatia, Cypr
9、us, 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, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kin
10、gdom. 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 worldwide for CEN national Members. Ref. No. EN 331:20
11、15 EBS EN 331:2015EN 331:2015 (E) 2 Contents Page European foreword . 4 1 Scope 5 2 Normative references 5 3 Terms, definitions, symbols, units and abbreviated terms . 7 4 Product characteristics . 9 4.1 Reaction to fire . 9 4.2 Dimensions and tolerance . 9 4.2.1 Materials . 9 4.2.2 Construction . 1
12、1 4.2.3 Product appearance 11 4.2.4 Valve maintenance 11 4.2.5 Springs . 11 4.2.6 Wall thickness . 11 4.2.7 Plug valves 11 4.2.8 Angular seal 11 4.2.9 Seals 12 4.2.10 Operation 12 4.2.11 Stops 13 4.2.12 Joints . 13 4.3 Classification of relevant characteristics 14 4.3.1 Pressure classes 14 4.3.2 Tem
13、perature classes . 14 4.3.3 High temperature resistance classes 14 4.4 Tightness (gas): leak tightness 15 4.5 Effectiveness: rated flow rate 15 4.6 Resistance to high temperature 16 4.7 Mechanical strength for gas networks . 16 4.7.1 Operating torque 16 4.7.2 Torque and bending mechanical strength 1
14、6 4.8 Safeguard against overloading of the handle Stop resistance 17 4.9 Release of dangerous substances . 17 4.10 Performance requirements 18 4.10.1 General . 18 4.10.2 Durability 18 5 Testing, assessment and sampling methods 18 5.1 General . 18 5.1.1 Test conditions 18 5.1.2 Test sequence 18 5.2 I
15、nternal pressure and leak-tightness . 18 5.2.1 General . 18 5.2.2 Pressure test values 19 5.2.3 Closure parts, external leak-tightness 19 5.2.4 Internal leak-tightness . 19 5.3 Rated flow rate 19 5.3.1 Apparatus 19 BS EN 331:2015EN 331:2015 (E) 3 5.3.2 Procedure 21 5.4 Operating torque 21 5.5 Torque
16、 and bending mechanical strength . 21 5.5.1 General . 21 5.5.2 Sequence of torsion and bending moment tests for valves . 21 5.6 Durability. 23 5.6.1 Endurance test . 23 5.6.2 Resistance to low temperature 23 5.6.3 Salt spray resistance 23 5.7 Angular seal 24 5.8 Safeguard against overloading of the
17、handle Stop resistance . 24 6 Assessment and verification of constancy of performance - AVCP . 24 6.1 General . 24 6.2 Type testing 24 6.2.1 General . 24 6.2.2 Test samples, testing and compliance criteria . 25 6.2.3 Test reports 26 6.2.4 Shared other party results 27 6.3 Factory production control
18、(FPC) . 27 6.3.1 General . 27 6.3.2 Requirements . 28 6.3.3 Product specific requirements 30 6.3.4 Initial inspection of factory and FPC 31 6.3.5 Continuous surveillance of FPC . 31 6.3.6 Procedure for modifications . 31 7 Marking, labelling, instructions and packaging 32 7.1 Marking and labelling .
19、 32 7.2 Instructions for installation and operation 32 7.3 Packaging . 33 Annex A (normative) Resistance to high temperatures for valves classes B and C . 34 A.1 General . 34 A.2 Procedure (external leakage) 34 A.2.1 Test criteria 34 A.2.2 Test method 34 A.2.2.1 Apparatus 34 A.2.2.2 Test procedure 3
20、5 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Regulation . 37 ZA.1 Scope and relevant characteristics 37 ZA.2 Procedure for AVCP of manually operated ball valves and closed bottom taper plug valves for gas installations for build
21、ings . 39 ZA.3 CE marking and labelling . 41 Bibliography . 45 BS EN 331:2015EN 331:2015 (E) 4 European foreword This document (EN 331:2015) has been prepared by Technical Committee CEN/TC 236 “Non industrial manually operated shut-off valves for gas and particular combinations valves-other products
22、”, the secretariat of which is held by UNI. 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 June 2016, and conflicting national standards shall be withdrawn at the latest by September 2017. Attent
23、ion is drawn to the 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 331:1998. The revised version: includes in one document the prev
24、ious publications of 1998 and 2010 to allow an easier reading of the text; allocates the clauses and the annexes in line with the framework of the standards which support CPR; enlarges the field of application to the nominal sizes DN 65, 80 and 100; updates the technical content in line with the cur
25、rent edition of the referenced standards; considers the proposals coming from the experience of the application of the previous edition of EN 331; adds Annex ZA for the relationship between this European Standard and the Essential Requirements of EN Construction Products Regulation. This document ha
26、s 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. According to the CEN-C
27、ENELEC 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,
28、 Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 331:2015EN 331:2015 (E) 5 1 Scope 1.1 This European Standard specifies the characteristics for the cons
29、truction, performance and safety of ball valves and closed bottom taper plug valves. It also details the test methods and marking provisions. It applies to metallic valves not directly buried for domestic and commercial installations inside or outside of buildings, using gases of the first, second a
30、nd third family (specified in EN 437) and working up to 0,2 105Pa, 0,5 105Pa, 1 105Pa, 5 105Pa and 20 105Pa and with temperature limits from 5 C or 20 C to + 60 C. NOTE “Not directly buried” within the context of this standard means that valves below ground are not in direct contact with earth or ot
31、her materials e.g. that they are in a protected encasement. 1.2 Valve nominal sizes (DN) covered by this European Standard are as follows: 6, 8, 10, 12, 15, 20, 25, 32, 40, 50, 65, 80, 100. 2 Normative references The following documents, in whole or in part, are normatively referenced in this docume
32、nt 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 377, Lubricants for applications in appliances and associated controls using combustible ga
33、ses except those designed for use in industrial processes EN 437:2003+A1:2009, Test gases - Test pressures - Appliance categories EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment EN 682, Elastomeric Seals - Materials requirements for seals used in pipes and fitt
34、ings carrying gas and hydrocarbon fluids EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 1: Anaerobic jointing compounds EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases
35、and hot water - Part 2: Non-hardening jointing compounds EN 751-3, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 3: Unsintered PTFE tapes EN 1092-1, Flanges and their joints Circular flanges for pipes, valves, fittings and accessori
36、es, 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 - Pa
37、rt 3: Copper alloy flanges EN 1254-1, Copper and copper alloys - Plumbing fittings - Part 1: Fittings with ends for capillary soldering or capillary brazing to copper tubes EN 1254-2, Copper and copper alloys - Plumbing fittings - Part 2: Fittings with compression ends for use with copper tubes BS E
38、N 331:2015EN 331:2015 (E) 6 EN 1254-8, Copper and copper alloys - Plumbing fittings - Part 8: Fittings with press ends for use with plastics and multilayer pipes EN 1412, Copper and copper alloys - European numbering system EN 1503-1, Valves Materials for bodies, bonnets and covers Part 1: Steels sp
39、ecified in European Standards EN 1503-3, Valves Materials for bodies, bonnets and covers Part 3: Cast irons specified in European Standards EN 1555-3, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 3: Fittings EN 1593:1999, Non-destructive testing - Leak testing - Bub
40、ble emission techniques EN 1982 Copper and copper alloys - Ingots and castings EN 10226 (all parts), Pipe threads where pressure tight joints are made on the threads EN 10255, Non-Alloy steel tubes suitable for welding and threading Technical delivery conditions EN 12163 Copper and copper alloys - R
41、od for general purposes EN 12164 Copper and copper alloys - Rod for free machining purposes EN 12165 Copper and copper alloys - Wrought and unwrought forging stock EN 12167 Copper and copper alloys - Profiles and bars for general purposes EN 12168 Copper and copper alloys - Hollow rod for free machi
42、ning purposes EN 12420 Copper and copper alloys - Forgings EN 12627, Industrial valves - Butt welding ends for steel valves EN 60730-1:2000, Automatic electrical controls for household and similar use - Part 1: General requirements (IEC 60730-1:1999, modified) EN ISO 228-1, Pipe threads where pressu
43、re-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation (ISO 228-1) EN ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227) ISO 65, Carbon steel tubes suitable for screwing in accordance with ISO 7-1 ISO 261, ISO general purpose metri
44、c screw threads General plan ISO 17885, Plastics piping systems - Mechanical fittings for pressure piping systems - Specifications BS EN 331:2015EN 331:2015 (E) 7 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 standard reference conditions c
45、onditions to which all measured values are corrected (temperature 15 C; pressure 1013,25 102Pa absolute; dry air) 3.2 shut off valve device which admits or closes the gas flow by movement of the closure member. A valve is manually operated if operation can be performed by the user 3.3 components 3.3
46、.1 obturator movable part of the valve which shuts off the gas flow 3.3.2 actuating mechanism part of the valve which actuates the obturator 3.3.3 manual actuator manually operated actuating mechanism 3.3.4 gas way passage in the valve through which the gas flows 3.3.5 joint means of connecting elem
47、ents of a gas installation SOURCE: EN 1775:2007 3.3.6 flexible appliance connector element of flexible pipework to be fitted between the end of fixed pipework and the appliance inlet connection SOURCE: EN 1775:2007 3.4 leak-tightness 3.4.1 external leak-tightness leak-tightness of a gas-carrying com
48、partment with respect to atmosphere 3.4.2 internal leak-tightness leak-tightness between the inlet and outlet of the valve with the obturator in the closed position BS EN 331:2015EN 331:2015 (E) 8 3.5 pressures pressures measured under static conditions. All pressures quoted are relative to atmosphe
49、ric pressure 3.5.1 inlet pressure pressure at the inlet of the valve 3.5.2 outlet pressure pressure at the outlet of the valve 3.5.3 maximum operating pressure (MOP) maximum pressure at which a valve can be operated continuously under normal operating conditions 3.5.4 test pressure pressure to be applied during the test 3.5.5 pressure difference difference between inlet and outlet pressures 3.6 rated flow rate flow rate of air, under standard reference conditions, at a given pressure drop 3.7 temperatu
