1、BRITISH STANDARDBS EN 60534-8-1:2005Industrial-process control valves Part 8-1: Noise considerations Laboratory measurement of noise generated by aerodynamic flow through control valvesThe European Standard EN 60534-8-1:2005 has the status of a British StandardICS 23.060.40; 17.140.20; 25.040.40g49g
2、50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60534-8-1:2005This British Standard was published under the authority of the Standards Policy and
3、Strategy Committee on 1 February 2006 BSI 1 February 2006ISBN 0 580 47390 2National forewordThis British Standard is the official English language version of EN 60534-8-1:2005. It is identical with IEC 60534-8-1:2005. It supersedes BS EN 60534-8-1:2001 which is withdrawn.The UK participation in its
4、preparation was entrusted by Technical Committee systems, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related i
5、nternational and European developments and promulgate them in the UK.A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be f
6、ound in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are res
7、ponsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17 and a back cover.The BSI copyright notice displayed in this
8、 document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsGEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements of EUROPEAN STANDARD EN 60534-8-1 NORME EUROPENNE EUROPISCHE NORM November 2005 CENELEC European Committee for Electrotec
9、hnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. E
10、N 60534-8-1:2005 E ICS 23.060.40; 17.140.20; 25.040.40 Supersedes EN 60534-8-1:2000English version Industrial-process control valves Part 8-1: Noise considerations - Laboratory measurement of noise generated by aerodynamic flow through control valves (IEC 60534-8-1:2005) Vannes de rgulation des proc
11、essus industriels Partie 8-1: Considrations sur le bruit - Mesure en laboratoire du bruit cr par un dbit arodynamique travers une vanne de rgulation (CEI 60534-8-1:2005) Stellventile fr die Prozessregelung Teil 8-1: Geruschbetrachtungen - Laboratoriumsmessungen von Geruschen bei gasdurchstrmten Stel
12、lventilen (IEC 60534-8-1:2005) This European Standard was approved by CENELEC on 2005-09-01. CENELEC 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-
13、date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation und
14、er the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany,
15、Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 65B/558/FDIS, future edition 2 of IEC 60534-8-1, prepared by SC 65B, Devices, of IEC
16、 TC 65, Industrial-process measurement and control, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60534-8-1 on 2005-09-01. This European Standard supersedes EN 60534-8-1:2000. This standard has been revised to obtain consistency in describing the methods for measur
17、ing internal and external sound pressure measurements and to update the description of the instrumentation from analog to digital. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (d
18、op) 2006-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-09-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60534-8-1:2005 was approved by CENELEC as a European Standard without any modif
19、ication. _ EN 60534-8-1:2005 2 3 EN 60534-8-1:2005 CONTENTS 1 Scope 4 2 Normative references .4 3 Terms and definitions .5 4 Symbols .5 5 Method A (external sound pressure measurement) 6 5.1 Test system.6 5.1.1 Pressure regulating devices .6 5.1.2 Test specimen .6 5.1.3 Test section piping.6 5.1.4 P
20、ressure taps 7 5.1.5 Acoustic environment.7 5.1.6 Instrumentation7 5.2 Test procedure 7 5.2.1 Test fluids7 5.2.2 Sound level sensor position7 5.2.3 Blow-down test limitations 7 5.2.4 Test data accuracy.8 5.2.5 Test data .8 5.2.6 Accuracy9 5.3 Data evaluation .9 6 Method B (internal sound pressure me
21、asurement).12 6.1 Test system.12 6.1.1 Pressure regulating devices .12 6.1.2 Test specimen .13 6.1.3 Test section piping.13 6.1.4 Pressure taps 13 6.1.5 Number of measuring points.13 6.1.6 Instrumentation for noise measurement 13 6.2 Testing procedures14 6.2.1 Test fluid .14 6.2.2 Fluid velocity14 6
22、.2.3 Background noise 14 6.2.4 Sound level sensor position14 6.2.5 Blow-down test limitations 15 6.2.6 Test data accuracy.15 6.2.7 Test data .15 6.2.8 Accuracy16 6.3 Data evaluation .16 Annex ZA (normative) Normative references to international publications with their corresponding European publicat
23、ions17Figure 1 Control valve noise test System components9 Figure 2 Test arrangements .11 Figure 3 Arrangement of a test stand (principle) .12 Figure 4 Mounting position of the sound level meter in the pipe for h 0,5 mm 14 EN 60534-8-1:2005 4 INDUSTRIAL-PROCESS CONTROL VALVES Part 8-1: Noise conside
24、rations Laboratory measurement of noise generated by aerodynamic flow through control valves 1 Scope This part of IEC 60534-8 defines equipment, methods, and procedures for obtaining laboratory measurements of sound pressure levels radiated by control valves and/or associated piping configurations,
25、including fixed restrictions, through which compressible fluids are passing. Control valves discharging to atmosphere are excluded from this standard. Method A is a uniform method of measuring the radiated noise from the valve and associated test piping and allows a comparison of various measuring r
26、esults which is beneficial for both user and manufacturer. The noise criteria are expressed by determining the sound pressure level of the valve under consideration. Method B is a procedure for measuring the sound pressure levels within pipe systems upstream and downstream of the valve under fixed o
27、perating conditions. Since inaccuracies due to the pipe transmission are eliminated, this method is preferred for evaluation of the acoustical characteristic of valves. The noise characteristics to be determined are useful for the following reasons: a) to compare the performance of different valves;
28、 b) to plan measures for noise abatement; c) to determine acoustical characteristics of valves and valve assemblies; d) to enable proper sizing of sound absorbers; e) to determine possible adverse effects on ultra-sonic flow meter measurements. 2 Normative references The following referenced documen
29、ts 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. IEC 60534-1, Industrial-process control valves Part 1: Control valve terminology
30、and general considerations IEC 60534 (all parts), Industrial-process control valves IEC 60534-2-3, Industrial-process control valves Part 2-3: Flow capacity Test procedures IEC 60534-8-3, Industrial-process control valves Part 8-3: Noise considerations Control valve aerodynamic noise prediction meth
31、od 5 EN 60534-8-1:2005 IEC 61260, Electroacoustics Octave-band and fractional-octave-band filters IEC 61672-1:2002, Electroacoustics Sound level meters Part 1: Specifications ISO 3744:1994, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering method in an e
32、ssentially free field over reflecting plane ISO 3745:2003, Acoustics Determination of sound power levels of noise sources Precision methods for anechoic and hemi-anechoic rooms 3 Terms and definitions For the purposes of this document, the following terms and definitions, as well as those given in I
33、EC 60534-1 and other parts of IEC 60534, apply. 3.1 test specimen any valve or combination of valve, reducer, expander, or other fittings for which test data are required NOTE During blow-down testing a closure mechanism should be used in such a way that the closure member position does not change d
34、uring blow-down. 3.2 blow-down rate rate at which the inlet pressure to the test specimen changes NOTE In the blow-down method of testing, the inlet pressure to the test specimen decays during the test period. 4 Symbols Symbol Description Unit C Flow coefficient (Cv, Kv) Various (see IEC 60534-1) Fp
35、Piping geometry factor 1 LpiInternal sound pressure level at pipe wall dB(ref Po) m b) test specimen; c) test section piping; d) pressure taps; e) noise-attenuating devices (optional); f) means of controlling the acoustic environment (chamber is optional); g) instrumentation. Alternative test arrang
36、ements are shown in Figures 2a and 2b. 5.1.1 Pressure regulating devices Upstream and/or downstream pressure regulating devices are used to regulate the test pressures. Caution should be taken to avoid pressure drops which will create significant stream-borne noise. If such pressure drops are unavoi
37、dable, the use of silencers (see 5.1.5) is recommended as shown in Figure 1. Flowmeters should be installed in accordance with the manufacturers instructions. 5.1.2 Test specimen The test specimen and test section shall not be insulated. However, separate tests may be conducted to determine the effe
38、cts of pipe and/or valve insulation. 5.1.3 Test section piping There is no limitation concerning the maximum length of downstream and upstream piping connected to the test specimen. The exposed downstream or upstream pipe within the acoustic environment shall be of one-piece construction, i.e., no f
39、langes, circumferential joints or other pipe-wall reinforcements, and at least 2 m in length. This applies to the downstream pipe when conducting downstream noise tests and to the upstream pipe when conducting upstream noise tests. Any mismatch between the inlet and outlet diameters of the test spec
40、imen and the inside diameter of the adjacent piping shall be minimized as far as practical. Non-insulated pipe shall be used. Pipe material and pipe wall thickness shall be reported in the test data. 7 EN 60534-8-1:2005 5.1.4 Pressure taps Pressure taps shall be provided for the measurement of press
41、ures. They shall conform to IEC 60534-2-3. 5.1.5 Acoustic environment The test environment shall be controlled in such a way that background, reflected, and other extraneous noise be at least 10 dB lower than that radiated by the test section. Depending on the test system and the acoustic environmen
42、t, upstream and downstream silencers may be necessary. General considerations for the acoustic environment can be found in ISO 3744 and ISO 3745. No sound pressure level correction shall be made for the presence of extraneous noise. 5.1.6 Instrumentation The instrumentation for sound pressure level
43、measurement shall conform to IEC 61672-1, Class 1 or Class 2. Sound level meter characteristics shall conform to IEC 61672-1, Table 2 (weighting A). Sound level meter calibration and sensitivity test results shall be corrected to sea-level conditions. Additional instrumentation such as electronic re
44、cording devices and computers shall not cause errors in the measured data of more than 1 dB. 5.2 Test procedure 5.2.1 Test fluids Air is the preferred fluid to be used in the test procedures. However, other compressible fluids may be substituted for air. The fluid shall be sufficiently dry to ensure
45、 that any icing which may take place does not affect the test results. Saturated vapours are not acceptable as test fluids unless the saturated vapour being used is the one for which data are required. 5.2.2 Sound level sensor position The sound level sensor shall be located 1 m from the nearest pip
46、e surface. The downstream distance shall be a minimum of 1 m from the beginning of the exposed section of the test piping but not less than six nominal pipe diameters downstream of the test specimen outlet (see Figures 2a and 2b). Orientation of the sound level sensor with respect to the piping shal
47、l be in accordance with the requirements of the sound level meter manufacturer. 5.2.3 Blow-down test limitations Blow-down test results are intended to simulate steady-state results. When using the blow-down method of testing, the blow-down rate shall be limited so that the time interval during whic
48、h acoustical data are obtained shall be at least 10 times as long as the response time of the acoustical instrumentation. The blow-down rate shall be further limited so that the inlet pressure does not decay more than 2 % of the maximum inlet pressure during the time interval used to obtain acoustic
49、 data. EN 60534-8-1:2005 8 5.2.4 Test data accuracy The accuracy of flow rate, pressure, travel, and temperature measurements shall conform to IEC 60534-2-3. 5.2.5 Test data The following data and description of the test specimen, and equipment facility, shall be recorded. 1) Upstream absolute pressure kPa or bar 2) Pressure differential and/or downstream pressure kPa or bar 3) Upstream fluid temperature K 4) Flow rate at reference conditions m3/h (see note), kg/s 5) Baromet
