BS PD CEN TR 15068-2009 Gas welding equipment n— Measurement of nnoise emitted by nblowpipe for welding ncutting heating nbrazing and soldering n— Measurement nmethod《气焊设备 焊接、切割、加热.pdf

1、PD CEN/TR15068:2009ICS 25.160.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWPUBLISHED DOCUMENTGas welding equipment Measurement ofnoise emitted byblowpipe for welding,cutting, heating,brazing and soldering MeasurementmethodThis Published Documentwas published under theautho

2、rity of the StandardsPolicy and StrategyCommittee on 30 April2009 BSI 2009ISBN 978 0 580 54758 4Amendments/corrigenda issued since publicationDate CommentsPD CEN/TR 15068:2009National forewordThis Published Document is the UK implementation of CEN/TR15068:2009.The UK participation in its preparation

3、 was entrusted to TechnicalCommittee WEE/18, Gas welding and cutting appliances.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 provisionsof a contract. Users are responsible for its corre

4、ct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.PD CEN/TR 15068:2009TECHNICAL REPORTRAPPORT TECHNIQUETECHNISCHER BERICHTCEN/TR 15068March 2009ICS 25.160.30English VersionGas welding equipment - Measurement of noise emitted byblowpipe for welding, cuttin

5、g, heating, brazing and soldering -Measurement methodMatriel de soudage aux gaz - Mesurage du bruit mis parles chalumeaux destins au soudage, brasage, coupage etchauffage - Mthode de mesurageGasschweigerte - Messungen fr von Brennern frSchweien, Schneiden, Wrmen, Hartlten und Weichltenerzeugte Gerus

6、che - MessverfahrenThis Technical Report was approved by CEN on 17 February 2009. It has been drawn up by the Technical Committee CEN/TC 121.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary

7、, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenu

8、e Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. CEN/TR 15068:2009: EPD CEN/TR 15068:2009CEN/TR 15068:2009 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Measu

9、rement conditions 45 Procedure .66 Test results .67 Test report 6PD CEN/TR 15068:2009CEN/TR 15068:2009 (E) 3 Foreword This document (CEN/TR 15068:2009) has been prepared by Technical Committee CEN/TC 121 “Welding”, the secretariat of which is held by DIN. Attention is drawn to the possibility that s

10、ome 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. PD CEN/TR 15068:2009CEN/TR 15068:2009 (E) 4 1 Scope This Technical Report specifies a test method for measuring the noise emitted

11、by manual blowpipes according to EN ISO 5172 used for welding, cutting and allied processes. This test method is used only for comparative purposes between manual blowpipes when tested under nominal conditions under clause 5. 2 Normative references The following referenced documents are indispensabl

12、e 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 13622:2002, Gas welding equipment Terminology Terms used for gas welding equipment EN 61260, Elec

13、troacoustics Octave-band and fractional-octave-band filters (IEC 61260:1995) EN 61672-1:2003, Electroacoustics Sound level meters Part 1: Specifications (IEC 61672-1:2002) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13622:2002 and EN 61672-1:2003

14、apply. 4 Measurement conditions 4.1 General Measurement can be performed indoors only. To measure the maximum emitted noise, the blowpipe under test is set in such a way that flame axis be horizontal, at least 1,5 m above the ground level, at least 1,5 m from the ceiling and at least at 5 m from the

15、 walls. Noise is measured for each type of nozzle which can be fitted on the blowpipe under nominal gas supply conditions indicated by the manufacturer. Microphone of sound level meter is placed at 1 m from the nozzle tip (see 4.4, Figure 1). 4.2 Measurement and correction of background noise Measur

16、ements of background noises shall be performed in order to guarantee that measurements of noise emitted by blowpipes are not influenced by interferences. Background sound pressure level shall be lower than noise level emitted by the blowpipe and background together by more than 6 dB. If difference o

17、f level is within 6 dB and 15 dB, calculate corrections of noise level according to Equation (1): dB)1010lg(1010/10/pAbpA,sbpA,LLL = (1) where LpAis the corrected noise level emitted by the blowpipe, in decibels; LpA,sbis the sound pressure level of the blowpipe and the background noise together, in

18、 decibels; PD CEN/TR 15068:2009CEN/TR 15068:2009 (E) 5 LpA,bis the background noise level. If difference of level is greater than 15 dB, no correction is made. 4.3 Measuring equipment 4.3.1 Sound level meters and filters Sound level meters in accordance with at least class 1 requirements of EN 61672

19、-1 shall be used, with frequency weighting A and time constant S. Another measurement equipment can be used, including for example a level recording device, providing that its global electroacoustical characteristics meets at least the requirements of EN 61672-1 class 1. Octave-band filters, if they

20、 are used, shall meet the requirements for a class 1 instrument as given in EN 61260. 4.3.2 Pressure gauges and flowmeters Pressure and flow measurements shall be performed at inlet of blowpipe to be tested. Gauges which are used for the pressure measurements shall have an accuracy of 3 % regarding

21、the indicated value or better. Flowmeters shall have an accuracy of 3 % regarding the indicated value of flow. 4.4 Measurement points for maximum emitted noise Measurements are performed in the same horizontal plane as the blowpipe flame. Measurement locations are situated at 1 m from the nozzle tip

22、. Six measurements are performed at locations defined by letters a to f in Figure 1. The measured sound pressure levels are denoted LpA, measured,ato LpA, measured, f. NOTE Maximum noise emitted by a blowpipe is situated just in front of the nozzle surface plane. Beyond an angle depending on the noz

23、zle, noise decreases again. Dimensions in millimetres View from the top Figure 1 Positions of the sensor of sound level meter PD CEN/TR 15068:2009CEN/TR 15068:2009 (E) 6 5 Procedure The nominal gas supply conditions indicated by the manufacturer (gas type, pressure and flow rate) shall be applied to

24、 a blowpipe for each of its nozzles, if they are interchangeable. After the blowpipe is fitted in its test device, each nozzle is fitted one after another one, and measurement is performed according to conditions specified in Clause 4. 6 Test results For each blowpipe/nozzle couple, the maximum valu

25、e, of the six performed measurements, corrected if necessary (see 4.2), is retained as the A-weighted emission sound pressure level, LpAcouple.7 Test report Test report shall include at least the following indications: a) date of test; b) name and address of body which performed measurements; c) mea

26、surements conditions (location, device reference, possible corrections); d) sufficient identification of equipment blowpipe, nozzle(s) which has been tested; e) for each nozzle: nominal supply conditions of blowpipe; A-weighted emission sound pressure level, LpAcouple, (see Clause 6). f) reference t

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