1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 13774:2013Valves for gas distributionsystems with maximumoperating pressure less than orequal to 16 bar PerformancerequirementsBS EN 13774:2013 BRITISH STANDARDNational for
2、ewordThis British Standard is the UK implementation of EN 13774:2013. Itsupersedes BS EN 13774:2003 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PSE/18/1, Industrial valves, steam traps, actuators andsafety devices against excessive pressure - Valves
3、 - Basic standards.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Publis
4、hed by BSI StandardsLimited 2013ISBN 978 0 580 74895 0ICS 23.060.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2013.Amendments issued since publicatio
5、nDate Text affectedBS EN 13774:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13774 February 2013 ICS 23.060.01 Supersedes EN 13774:2003English Version Valves for gas distribution systems with maximum operating pressure less than or equal to 16 bar - Performance requirements Appareils de r
6、obinetterie pour les systmes de distribution du gaz avec une pression maximale de service infrieure ou gale 16 bar - Exigences de performance Armaturen fr Gasverteilungssysteme mit zulssigen Betriebsdrcken kleiner oder gleich 16 bar - Anforderungen an die Gebrauchstauglichkeit This European Standard
7、 was approved by CEN on 28 December 2012. 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 su
8、ch 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 version in any other language made by translation under the responsibility of a CEN member into its ow
9、n 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
10、Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORM
11、UNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13774:2013: EBS EN 13774:2013EN 13774:2013 (E) 2 Contents Page Foreword . 4 1 Scope 5 2 Normative references . 5 3 Terms
12、and definitions 7 4 Symbols and abbreviations . 8 5 Requirements, type tests and production tests 8 5.1 Type testing 8 5.1.1 Test samples 8 5.1.2 Test documents 8 5.1.3 Certification body . 9 5.2 Materials . 9 5.2.1 Shell 9 5.2.2 Obturator 10 5.2.3 Stem or shaft 10 5.2.4 Springs . 11 5.2.5 Seals . 1
13、1 5.2.6 Lubricants 11 5.3 Design . 11 5.3.1 General . 11 5.3.2 Strength design 12 5.3.3 Stems or shafts 12 5.3.4 Shell tappings 12 5.3.5 Bolt holes for assembly purposes 13 5.3.6 Manufacturing apertures 13 5.3.7 Sealing systems . 13 5.3.8 Extended drain, vent and sealant lines . 13 5.4 Dimensions. 1
14、4 5.4.1 Threaded ends 14 5.4.2 End connections 15 5.4.3 End-to-end dimensions 15 5.5 Operability and endurance 15 5.5.1 Operability 15 5.5.2 Endurance 16 5.6 Strength of stops . 16 5.7 Mechanical resistance against excessive actuating forces . 16 5.8 Resistance of the obturator to static differentia
15、l pressure 16 5.9 Shell strength . 16 5.10 External leak tightness 17 5.11 Internal leak tightness 17 5.12 Resistance to wear (optional test) . 17 5.13 Reference flow rate (optional test) 18 5.14 Cleanliness . 18 5.15 Storage . 18 6 Marking . 18 Annex A (normative) Test methods for valves 20 A.1 Acc
16、uracy of measurements and stability 20 A.2 Test method 1: operability and operating forces test . 20 A.2.1 General . 20 BS EN 13774:2013EN 13774:2013 (E) 3 A.2.2 Operability test . 20 A.2.3 Endurance test . 20 A.3 Test method 2: strength of stops 21 A.3.1 General . 21 A.3.2 Procedure . 21 A.4 Test m
17、ethod 3: resistance of the obturator to static differential pressure 21 A.5 Test method 4: wear test 21 A.5.1 General . 21 A.5.2 Procedure . 21 A.6 Test method 5: internal leak tightness test for DIB valves . 22 A.6.1 General . 22 A.6.2 Procedure . 22 A.6.3 Test conditions . 23 A.7 Test method 6: st
18、rength test on torque/thrust 23 A.7.1 General . 23 A.7.2 Measured breakaway torque/thrust . 23 A.7.3 Performance of test 24 A.7.4 Acceptance criteria 24 Annex B (informative) European Standards for valves 25 Annex C (informative) Summary of tests on product and type tests 26 Bibliography 29 BS EN 13
19、774:2013EN 13774:2013 (E) 4 Foreword This document (EN 13774:2013) 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
20、 by endorsement, at the latest by August 2013, and conflicting national standards shall be withdrawn at the latest by August 2013. Attention 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 fo
21、r identifying any or all such patent rights. This document supersedes EN 13774:2003. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. The following is a list of the main changes compared to the previous edition: a) the S
22、cope has been modified; b) the Normative References (Clause 2) have been updated; c) requirements of type tests and production tests (Clause 5) have been completely revised, in particular: 1) requirements for “strength design” (5.3.2), for “extended drain, vent and sealant lines” (5.3.8), for “end-t
23、o-end dimensions” (5.4.3), for “mechanical resistance against excessive actuating forces” (5.7) have been added; 2) requirements for “resistance to wear” (5.12) and for “reference flow rate” (5.13) became optional; 3) requirements for “bending resistance” and for “resistance to liquid agents” have b
24、een deleted; d) the annex on analysis of the technical file and recording of the initial conditions has been deleted; e) the annex on test methods for valves (Annex A) has been updated; f) the annex on additional characteristics on request from the purchaser has been deleted; g) the annex on resista
25、nce to bending moment applied via the stem or the shaft has been deleted; h) the annex providing the European Standards for valves (Annex B) has been updated; i) the annex giving a summary of tests on product and type tests (Annex C) has been added; j) the Bibliography has been updated. According to
26、 the CEN/CENELEC Internal Regulations, the national standards organisations 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
27、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13774:2013EN 13774:2013 (E) 5 1 Scope This European Standard deals with metal isolating valve
28、s used for gas distribution systems with maximum operating pressure up to 16 bar, and which operate with fuel gases of the first, the second and the third family, in accordance with EN 437. The types of isolating valves to be considered are: plug and ball valves, gate valves, globe valves and butter
29、fly valves. This standard does not apply to: valves for domestic installations; safety type pressure relief valves; wellhead valves. In the case of power operated valves, the requirements for the power source are not covered by this European Standard. The valves covered in this European Standard ope
30、rate in the following classes of temperature: - 10 C to 60 C; - 20 C to 60 C; the range is stated by the purchaser for special design. This European Standard gives additional requirements to the relevant products standards. (See Annex B.) In case of contradictions between the standards mentioned in
31、Annex B and this European Standard, EN 13774 prevails. 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
32、edition of the referenced document (including any amendments) applies. EN 19, Industrial valves Marking of metallic valves EN 377, Lubricants for applications in appliances and associated controls using combustible gases except those designed for use in industrial processes EN 549, Rubber materials
33、for seals and diaphragms for gas appliances and gas equipment 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 valves EN 682, Elastomeric Seals Materials requirements for seals used in pipes and fittings carr
34、ying gas and hydrocarbon fluids EN 736-1:1995, Valves Terminology Part 1: Definition of types of valves EN 736-2:1997, Valves Terminology Part 2: Definition of components of valves BS EN 13774:2013EN 13774:2013 (E) 6 EN 736-3:2008, Valves Terminology Part 3: Definition of terms EN 764-1:2004, Pressu
35、re equipment Part 1: Terminology Pressure, temperature, volume, nominal size 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 acce
36、ssories, 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 EN 1555-1, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 1: General EN 1555-2
37、, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 2: Pipes EN 1555-3, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 3: Fittings EN 1759-1, Flanges and their joint Circular flanges for pipes, valves, fittings and accessories, Class desig
38、nated 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 10204, Metallic products Types of inspection documents EN 10226-1, Pipe threads where pressure tight joints ar
39、e made on the threads Part 1: Taper external threads and parallel internal threads Dimensions, tolerances and designation EN 12117, Plastics piping systems Fittings, valves and ancillaries Determination of gaseous flow rate/pressure drop relationships EN 12266-1:2012, Industrial valves Testing of me
40、tallic valves Part 1: Pressure tests, test procedures and acceptance criteria Mandatory requirements EN 12516-1, Industrial valves Shell design strength Part 1: Tabulation method for steel valve shells EN 12516-2, Industrial valves Shell design strength Part 2: Calculation method for steel valve she
41、lls EN 12516-3, Valves Shell design strength Part 3: Experimental method EN 12516-4, Industrial valves Shell design strength Part 4: Calculation method for valve shells manufactured in metallic materials other than steel EN 12570, Industrial valves Method for sizing the operating element EN 12627, I
42、ndustrial 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 13942, Petroleum and natural gas industries Pipeline transportation systems Pipeline valves (ISO 14313:2007 modified) EN ISO 228-1, Pipe threads wher
43、e pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation (ISO 228-1) BS EN 13774:2013EN 13774:2013 (E) 7 EN ISO 8434-1, Metallic tube connections for fluid power and general use Part 1: 24 degree cone connectors (ISO 8434-1) ISO 272, Fasteners Hexagon produc
44、ts Widths across flats ASME B1.20.1, Pipe Threads, General Purpose (Inch) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 736-1:1995, EN 736-2:1997, EN 736-3:2008 and EN 764-1:2004 and the following apply. 3.1 gas distribution system pipeline system i
45、ncluding piping above and below ground and all other equipment necessary to supply the gas to the consumers 3.2 external tightness shell tightness tightness of the gas-containing envelope with respect to the atmosphere 3.3 internal tightness seat tightness tightness ensured between the valve inlet a
46、nd outlet by the closure device in the closed position 3.4 volume rate of flow volume of fluid discharged by the valve per time unit 3.5 reference flow rate rate of the air flow in cubic metres per hour, as measured at 0 C at the absolute pressure of 1 013 mbar, discharged by the valve and creating
47、therein a specified pressure drop, at a specified air pressure upstream of the valve 3.6 maximum allowable pressure pmaxmaximum pressure at which any part of a valve continuously operates at a specified operating temperature 3.7 maximum operating pressure MOP maximum pressure in a system operated co
48、ntinuously under normal operating conditions Note 1 to entry: “Normal operating conditions“ means no malfunctioning of the equipment or disruption to the gas flow. 3.8 maximum strength torque maximum torque applied to the stem or the shaft, with the obturator either totally open or totally closed, w
49、hich causes no alteration to the functional capability of the valve BS EN 13774:2013EN 13774:2013 (E) 8 3.9 maximum operating torque maximum torque applied on the stem or shaft of a valve to ensure its operation under the maximal allowable pressure (pmax) and at any operating temperature 3.10 operating cycle full operating from the closed position to the opened position and back to the closed position 3.11 block and bleed facility equipment put togeth
