EN 12351-2010 en Industrial valves - Protective caps for valves with flanged connections《工业阀门 带法兰联接的阀门用护罩》.pdf

1、BS EN 12351:2010ICS 23.060.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDIndustrial valves Protective caps forvalves with flangedconnectionsThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 May 2010 BSI

2、2010ISBN 978 0 580 68487 6Amendments/corrigenda issued since publicationDate CommentsBS EN 12351:2010National forewordThis British Standard is the UK implementation of EN 12351:2010. Itsupersedes BS EN 12351:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCo

3、mmittee PSE/18/1, Industrial valves, steam traps, actuators andsafety devices against excessive pressure - Valves - Basic standards.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisio

4、nsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 12351:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12351 April 2010 ICS 23.060.01 Supersedes EN 12351:1999English Version Industrial va

5、lves - Protective caps for valves with flanged connections Robinetterie industrielle - Bouchons protecteurs pour les appareils de robinetterie raccordements brides Industriearmaturen - Schutzkappen fr Armaturen mit Flanschanschlu This European Standard was approved by CEN on 11 March 2010. CEN membe

6、rs 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 standards may be obtained on applicatio

7、n 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 notified to the CEN Management Centre has th

8、e same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Polan

9、d, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by an

10、y means reserved worldwide for CEN national Members. Ref. No. EN 12351:2010: EBS EN 12351:2010EN 12351:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Requirements .44 Design .45 Materials .56 Marking .5Annex A (informative) Design of protective caps for valves with flanged con

11、nections 6BS EN 12351:2010EN 12351:2010 (E) 3 Foreword This document (EN 12351:2010) 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

12、 identical text or by endorsement, at the latest by October 2010, and conflicting national standards shall be withdrawn at the latest by October 2010. 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

13、 held responsible for identifying any or all such patent rights. This document supersedes EN 12351:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croat

14、ia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 12351:2010EN 12351:2010

15、 (E) 4 1 Scope This European Standard specifies protective caps for flanged valves with and without internal coating. The use of protective caps according to this European Standard is limited to the protection during transport and storage to prevent: the entry of dirt; the damage of the connecting s

16、urfaces. The protective caps do not protect against the consequences of improper handling. This European Standard does not apply to protective caps for valves and pipe fittings with welded and threaded ends. NOTE It is possible to use these protective caps with flanged components other than valves.

17、2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 1043-1, Plastics Sy

18、mbols and abbreviated terms Part 1: Basic polymers and their special characteristics (ISO 1043-1:2001) ISO 1629, Rubbers and latices Nomenclature 3 Requirements 3.1 The protective caps shall completely cover the port and the sealing surface of the flange and shall prevent damage. The design of caps

19、shall be such that when fitted to flanges, they remain attached during normal handling, transport and storage until they are removed before installation of the valve. 3.2 The protective caps shall fit so tightly that no foreign matter and coarse dirt can penetrate which would impede the correct func

20、tion of the protected part. Caps shall not be watertight or airtight. 3.3 The protective caps shall be designed in such a way that the installation of the valve without removal of the protective cap shall be impossible. 3.4 It is recommended that bright signal colours be used, preferably yellow or r

21、ed. If a particular colour is required it shall be indicated in the order. 4 Design The design may be at the option of the manufacturer and shall comply with the requirements of Clause 3. Examples of protective caps are shown in Annex A and are provided for information only. BS EN 12351:2010EN 12351

22、:2010 (E) 5 5 Materials Materials shall be compatible with the material of the valve and shall not cause contamination or corrosion of the valve. NOTE In the range of DN 10 to DN 300 plastic or rubber materials are preferred. 6 Marking Caps which are intended to be re-used shall be marked as follows

23、: reference to this European Standard, i.e. EN 12351; either DN or NPS; either PN or Class; material (for recycline purposes) according to EN ISO 1043-1 and ISO 1629. NOTE Protective caps which are used at different nominal pressures (PN) can be marked with the nominal pressure (PN) range instead of

24、 one particular nominal pressure (PN). BS EN 12351:2010EN 12351:2010 (E) 6 Annex A (informative) Design of protective caps for valves with flanged connections Annex A contains examples of acceptable cap designs. It does not exclude the use of alternative designs which meet the requirements of this E

25、uropean Standard. Figure A.1 Design with orifice plug Key 1 rim 2 edge Figure A.2 Design with rim and edge Figure A.3 Design with plugs for the bolt holes BS EN 12351:2010This page has been intentionally left blank BS EN12351:2010BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44

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