BS PD CEN TR 13932-2009 Rotodynamic pumps. Recommendations for fitting of inlet and outlet on piping
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ID： |
33958762496C4DA5B9C4D81C957ECF21 |
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文件大小(MB)： |
0.37 |
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页数： |
28 |
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文件格式： |
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日期： |
2011-3-9 |
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购买： |
文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
PD CEN/TR,13932:2009,ICS 23.080,NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW,PUBLISHED DOCUMENT,Rotodynamic pumps,— Recommendations,for fitting of inlet and,outlet on piping,This Published Document,was published under the,authority of the Standards,Policy and Strategy,Committee on 28 February,2009,. BSI 2009,ISBN 978 0 580 62249 6,Amendments/corrigenda issued since publication,Date Comments,PD CEN/TR 13932:2009,National foreword,This Published Document is the UK implementation of CEN/TR,13932:2009.,The UK participation in its preparation was entrusted to Technical,Committee MCE/6, Pumps and pump testing.,A list of organizations represented on this committee can be obtained on,request to its secretary.,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 cannot confer immunity,from legal obligations.,PD CEN/TR 13932:2009,TECHNICAL REPORT,RAPPORT TECHNIQUE,TECHNISCHER BERICHT,CEN/TR 13932,January 2009,ICS 23.080 Supersedes CR 13932:2000,English Version,Rotodynamic pumps - Recommendations for fitting of inlet and,outlet on piping,Pompes rotodynamiques - Recommandations pour les,raccordements des tuyauteries d'aspiration et de,refoulement,Kreiselpumpen - Empfehlungen für Rohrleitungsanschlüsse,an Ein-und Autrittstutzen,This Technical Report was approved by CEN on 13 October 2008. It has been drawn up by the Technical Committee CEN/TC 197.,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, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.,EUROPEAN COMMITTEE FOR STANDARDIZATION,COMITé EUROPéEN DE NORMALISATION,EUROP腎SCHES KOMITEE FüR NORMUNG,Management Centre: Avenue Marnix 17, B-1000 Brussels,. 2009 CEN All rights of exploitation in any form and by any means reserved,worldwide for CEN national Members.,Ref. No. CEN/TR 13932:2009: E,PD CEN/TR 13932:2009,CEN/TR 13932:2009 (E),2,Contents Page,Foreword 3..,Introduction . 4..,1.. Scope . 5..,2.. Normative references .. 6..,3.. Definitions .. 6..,4.. Minimum installation precautions. 7..,4.1.. Pipework components 7..,4.1.1.. Convergent - divergent pipes .. 7..,4.1.2.. Elbows 10..,4.1.3.. Tees .. 18..,4.1.4.. Junctions .. 20..,4.1.5.. Devices to improve flow 23..,4.2.. Valves and fittings .. 23..,4.2.1.. Stop valves .. 23..,4.2.2.. Regulating valves 24..,4.2.3.. Check valves (according to EN 12334 and EN 14341) .. 24..,4.2.4.. Valve accessories 24..,Bibliography . 25..,PD CEN/TR 13932:2009,CEN/TR 13932:2009 (E),3,Foreword,This document (CEN/TR 13932:2009) has been prepared by Technical Committee CEN/TC 197 “Pumps”, the,secretariat of which is held by AFNOR.,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 for identifying any or all such patent rights.,This document supersedes CR 13932:2000.,PD CEN/TR 13932:2009,CEN/TR 13932:2009 (E),4,Introduction,The inlet and outlet piping of a pump almost always includes peculiarities or accessories (changes of crosssectional,area, elbows, connections, valves, filters, check valves, etc.). Particularly in the case of inlet piping, flow,disturbances such as swirl, unbalance in the distribution of velocities and pressures and sudden variations in,velocity are harmful to the hydraulic performance of the pump, its mechanical behaviour and its reliability.,This document cannot attempt to cover the almost infinite range of disturbances that may be encountered as well,as all their types, geometries and possible combinations. In cases that are not dealt with below, the layout of the,piping should be determined by mutual agreement between the parties in keeping with the spirit or a certain,number of principles:,. straight lengths indicated in this document are adequate values in most cases but it is always beneficial, from a,purely hydraulic point of view, to increase them. The optimum length is usually the result of a cost-benefit,trade-off.,. the most hazardous disturbances are those which create a swirling flow as a result of several changes of,direction in various planes, this swirl always takes a very long time to settle down, or disturbances which create,a very marked unbalanced flow due to a sudden change in cross-sectional area.,. generally speaking, the higher the specific speed of a pump, the more……
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