1、BRITISH STANDARD Gas pressure regulators for inlet pressures up to 100 bar ICS 23.060.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN334:200
2、5+A1:2009BS EN 334:2005+A1:2009This British Standard was published under the authority of the Standards Policy and Strategy Committee on 23 February 2006 BSI 2009ISBN 978 0 580 67844 8National forewordThis British Standard is the UK implementation of EN 334:2005+A1:2009.It supersedes BS EN 334:2005
3、which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee The start and finish of text introduced or altered by amendment is indicatedin the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN
4、 amendment A1 is indicated by . GSE/32, Gas governors.A list of organizations represented on this committee can be obtained on request to its secretary.WarningThe responsible BSI technical committee GSE/32 Gas governors wishes to bring to the attention of users of this British Standard the following
5、 essential information. The UK as a member of CEN, is obliged to publish EN 334:2005 as a British Standard. However, attention is drawn to the fact that during the development of this European Standard, the UK voted against its approval as a European Standard. The reason for this disapproval was tha
6、t pressure regulators commonly used in the UK had been excluded from the harmonized part of the standard.As a result, the UK has applied for an extension of the date of withdrawal of the existing BS EN 334:1999. This has been accepted. Hence BS EN 334:1999 will continue in existence in parallel with
7、 the 2005 version until March 2008.It is the intention of the BSI technical committee to have amendments to the harmonized standards approved by 2007 so that all devices are included in the harmonized part of the standard.At the present time gas pressure regulators are used in accordance with the UK
8、 national guidelines for pressure regulating stations up to 100 bar, issued by the Institute of Gas Engineers and Managers document, IGE/TD/13.Amendments/corrigenda issued since publicationDateCommentsThis publication does not purport to include all the necessary provisions of a contract. Users are
9、responsible for its correct application. Compliance with a British Standard cannot confer immunity fromlegal obligations.30 June 2009 Implementation of CEN amendment A1:2009A1A1EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 334:2005+A1 January 2009 ICS 23.060.40 Supersedes EN 334:2005English V
10、ersion Gas pressure regulators for inlet pressures up to 100 bar Appareils de rgulation de pression de gaz (rgulateurs) pour des pressions amont jusqu 100 bar Gas-Druckregelgerte fr Eingangsdrcke bis 100 bar This European Standard was approved by CEN on 23 December 2004 and includes Amendment 1 appr
11、oved by CEN on 8 December 2008.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 such national
12、 standards may be obtained on application to the CEN 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 own language and noti
13、fied to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Ma
14、lta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T E U R O P E N D E N O R M A LI S A T I O N EUR OP IS C HES KOM ITEE FR NOR M UNG Management Centre: rue de Stassart, 36 B-1050 Brus
15、sels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 334:2005+A1:2009: EEN 334:2005+A1:2009 (E) 2 Contents page Foreword 5g31g3 Scope 6g32g3 Normative references 7g33g3 Terms, definitions and symbols . 9g33.1g3 !General terms
16、and definitions of types of gas pressure regulators“ 9g33.2g3 !Terms and definitions of components of gas pressure regulators“ . 12g33.3g3 !Terms, symbols and definitions of components of functional performance“ . 14g33.3.7g3 !Terms, symbols and definitions of functional performance“ 16g33.4g3 !Term
17、s, symbols and definitions related to design and tests“ . 20g34g3 Construction requirements . 22g34.1g3 Basic requirements . 22g34.1.1g3 General 22g34.1.2g3 !Gas pressure regulators with associated safety devices 23g34.1.3g3 End connections 25g34.1.4g3 Flange ratings 25g34.1.5g3 Nominal sizes and fa
18、ce-to-face dimensions . 25g34.1.6g3 Sealing of the adjusting device 29g34.1.7g3 !Springs 29g34.1.8g3 Replaceable parts that may be affected by erosion or abrasion 29g34.2g3 Materials . 29g34.2.1g3 Requirements for metallic materials 29g34.2.2g3 Requirements for elastomers (including vulcanized rubbe
19、rs) . 34g34.2.3g3 Requirements for non metallic materials different from those in 4.2.2 . 34g34.3g3 Strength of housings . 35g3g3 ! 35g34.3.1g3 Body and its inner metallic partition walls“ 35g34.3.2g3 Flanges . 35g34.3.3g3 !Other pressure containing parts 35g34.3.4g3 Inner metallic partition walls 3
20、7g34.3.5g3 Minimum values of safety factor 37g34.3.6g3 Welded joint coefficient 38g35g3 Functional requirements . 38g35.1g3 General 38g35.1.1g3 Mounting position 38g35.1.2g3 Sound emission . 38g35.2g3 Shell strength, external tightness and internal sealing . 39g35.2.1g3 Shell strength . 39g35.2.2g3
21、External tightness 40g35.2.3g3 Internal sealing 40g35.3g3 Control classifications 40g35.3.1g3 Accuracy under stable conditions . 40g35.3.2g3 Lock-up behaviour . 40g35.3.3g3 Stable conditions . 41g35.4g3 Final visual inspection 41g35.5g3 Fail-close conditions . 42g36g3 Gas pressure regulator sizing 4
22、2g36.1g3 Flow behaviour 42g3BS EN 334:2005+A1:2009EN 334:2005+A1:2009 (E) 3 6.2g3 Sizing equations for the calculation of volumetric flow rates of a gas pressure regulator with its control member in its mechanically fully open position . 43g36.2.1g3 Normal calculations 43g36.2.2g3 Practical calculat
23、ions 43g36.2.3g3 Simplified calculations 43g36.3g3 Calculation of the maximum accuracy flow rate 44g36.4g3 Inherent flow characteristics 44g36.5g3 Calculation of volumetric flow rates for partially open gas pressure regulators . 44g36.6g3 Flow coefficient . 44g37g3 Testing 45g37.1g3 General . 45g37.
24、2g3 Tests . 45g37.3g3 Type test . 46g37.4g3 Selection of test samples . 47g37.5g3 Routine tests 47g37.6g3 Production surveillance 47g37.7g3 Test and verification methods . 47g37.7.1g3 Dimensional check and visual inspection 47g37.7.2g3 Materials check 47g37.7.3g3 Verification of the strength of pres
25、sure containing parts and inner metallic partition walls 48g37.7.4g3 Shell and inner metallic partition walls strength test 49g37.7.5g3 Alternative shell and inner metallic partition walls strength test . 50g37.7.6g3 External tightness test 50g37.7.7g3 Functional tests . 51g37.7.8g3 Final visual ins
26、pection 64g38g3 Documentation 64g38.1g3 Documentation related to type test . 64g38.1.1g3 Documentation required prior to type test . 64g38.1.2g3 Test report 64g38.2g3 Documentation related to the routine tests 64g38.2.1g3 Documentation provided at the request of the customer . 64g38.2.2g3 Documentat
27、ion provided with the regulator . 65g38.3g3 Documentation related to production surveillance in accordance with 7.6 65g38.3.1g3 Documentation to be available for production surveillance . 65g38.3.2g3 Production surveillance report 66g39g3 Marking . 66g39.1g3 General requirements . 66g39.2g3 Markings
28、 for the various connections 67g39.3g3 Marking of integrated safety devices 67g3Annex A (informative) Alternative methods for the determination of the accuracy class, the lock-up pressure class, the maximum accuracy flow rate, the flow coefficients and the verification of the hysteresis band 68g3A.1
29、g3 General . 68g3A.2g3 Test methods . 68g3A.2.1g3 Direct acting gas pressure regulator . 68g3A.2.2g3 Pilot controlled gas pressure regulators 69g3A.3g3 Determination of flow coefficients for larger capacity regulators . 70g3Annex B (informative) Inspection certificate 76g3Annex C (informative) Accep
30、tance test 78g3Annex D (informative) Compliance evaluation) 79g3D.1g3 General . 79g3D.2g3 Introduction 79g3D.3g3 Procedure . 79g3D.4g3 Manufacturers compliance evaluation . 80g3D.5g3 Issue of the certificate of compliance . 80g3BS EN 334:2005+A1:2009EN 334:2005+A1:2009 (E) 4 Annex E (informative) !S
31、eat leakage (alternative requirement)“ 81g3Annex F (normative) Creep (venting) relief device 82g3F.1g3 General 82g3F.2g3 Terms and definitions . 82g3F.3g3 Requirements . 82g3F.3.1g3 Construction 82g3F.3.2g3 Functional requirements . 82g3F.4g3 Testing 82g3F.5g3 Type test . 83g3F.6g3 Routine tests 83g
32、3F.7g3 Documentation . 83g3F.8g3 Marking . 83g3Annex G (informative) Order specification . 84g3G.1g3 General 84g3G.2g3 Minimum specifications 84g3G.2.1g3 Details of construction 84g3G.2.2g3 Dimensions. 84g3G.2.3g3 Performance . 84g3G.3g3 Optional specifications . 85g3Annex H (normative) Materials 87
33、g3H.1g3 Steel materials for pressure containing parts and inner metallic partition walls . 87g3H.2g3 Metallic materials different from steel materials for pressure containing parts and inner metallic partition walls 93g3H.3g3 Materials for fixtures, integral process and sensing lines, connectors and
34、 fasteners 98g3Annex I (informative) !Glossary . 101g3Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC 103g3Bibliography 105g3BS EN 334:2005+A1:2009EN 334:2005+A1:2009 (E) 5 Foreword This document (EN 334:2005+A1:2009) has bee
35、n prepared by Technical Committee CEN/TC 235 “Gas pressure regulators and associated safety devices for use in gas transmission and distribution”, 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 t
36、ext or by endorsement, at the latest by July 2009, and conflicting national standards shall be withdrawn at the latest by July 2009. This document includes Amendment 1, approved by CEN on 2008-12-08. This document supersedes !EN 334:2005“. The start and finish of text introduced or altered by amendm
37、ent is indicated in the text by tags ! “. 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 97/23/EC. For relationship with EU Directive 97/23/EC, see informative Annex
38、ZA, which is an integral part of this document. Gas pressure regulators dealt with in this document are standard gas pressure regulators and, when used in pressure regulating stations complying with EN 12186 or EN 12279, they are considered as standard pressure equipment in accordance with Clause 3.
39、1 of Art. 1 of Pressure Equipment Directive 97/23/EC (PED). For standard gas pressure regulators used in pressure regulating stations complying with EN 12186 or EN 12279, Table ZA.1 given in Annex ZA includes all applicable Essential Requirements given in Annex I of PED, !except the external corrosi
40、on resistance in case of environmental conditions where corrosion is likely to occur“. The normative Annex H of this document lists some suitable materials for pressure containing parts, inner metallic partition walls, fasteners and connectors. Other materials may be used when complying with the res
41、trictions given in Table 5. !deleted text“ !Continued“ integrity of gas pressure regulators is assured by periodic functional checks. For periodic functional checks it is common to refer to national regulations/standards where existing or users/manufacturers practices. According to the CEN/CENELEC I
42、nternal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,
43、 Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 334:2005+A1:2009EN 334:2005+A1:2009 (E) 6 1 Scope !This document specifies constructional, functional, testing and marking requirements, sizing and documentation of gas pr
44、essure regulators used in the pressure regulating stations in accordance with EN 12186 or EN 12279:“ for inlet pressures up to 100 bar and nominal diameters up to DN 400; for an operating temperature range from -20 C to +60 C, which operate with fuel gases of the 1st and 2nd family in accordance wit
45、h EN 437 in transmission and distribution networks and also in commercial and industrial installations. “Gas pressure regulators“ hereafter will be called “regulators“ except in the titles. !For standard regulators when used in pressure regulating stations complying with EN 12186 or EN 12279, Annex
46、ZA lists all applicable Essential Requirements except the external corrosion resistance in case of environmental conditions where corrosion is likely to occur.“ !This document considers the following classes/types of regulators:“ class 1: operating temperature range from -10 C to 60 C; class 2: oper
47、ating temperature range from -20 C to 60 C; ! type IS: (integral strength type); type DS: (differential strength type).“ This document applies to regulators which use the pipeline gas as a source of control energy unassisted by any external power source. The regulator may incorporate a creep (ventin
48、g) relief device, complying with the requirements in Annex F. The regulators complying with the requirements of this document may be declared as “in compliance with EN 334“ and bear the marking “EN 334”. This document does not apply to: regulators upstream from/on/in domestic gas-consuming appliance
49、s which are installed downstream of domestic gas meters; ! regulators incorporated into pressure-regulating devices used in service lines1 with volumetric flow rate g148 200 m3/h at normal conditions and inlet pressure g148 5 bar;“ regulators for which a specific document exists (e.g. EN 88, etc.); industrial process control valves in accordance with EN 1349. 1) !The services lines are those defined in EN 12279.“ BS EN 334:2005+A1:2009EN 334:2005+A1:2009 (E) 7 2 Normative references The following referenced documents are indispensable for
