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
27、o this standard. PD CEN/TR 15068:2009This page has been intentionally left blank PD CEN/TR15068:2009BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - British Standards InstitutionBSI is the independent national body responsible for preparing B
28、ritishStandards. It presents the UK view on standards in Europe and at theinternational level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments oreditions.It is the
29、constant aim of BSI to improve the quality of our products and services.We would be grateful if anyone finding an inaccuracy or ambiguity while usingthis British Standard would inform the Secretary of the technical committeeresponsible, the identity of which can be found on the inside front cover. T
30、el:+44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual updating service called PLUS which ensuresthat subscribers automatically receive the latest editions of standards.Buying standardsOrders for all BSI, international and foreign standards publications should beaddressed
31、to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 89967001 Email: You may also buy directly using a debit/creditcard from the BSI Shop on the Website http:/ response to orders for international standards, it is BSI policy to supply theBSI implementation of those that have been publishe
32、d as British Standards,unless otherwise requested.Information on standardsBSI provides a wide range of information on national, European andinternational standards through its Library and its Technical Help to ExportersService. Various BSI electronic information services are also available whichgive
33、 details on all its products and services. Contact Information Centre. Tel:+44 (0)20 8996 7111 Fax: +44 (0)20 8996 7048 Email: Subscribing members of BSI are kept up to date with standards developmentsand receive substantial discounts on the purchase price of standards. For detailsof these and other
34、 benefits contact Membership Administration. Tel: +44 (0)208996 7002 Fax: +44 (0)20 8996 7001 Email: Information regarding online access to British Standards via British StandardsOnline can be found at http:/ information about BSI is available on the BSI website at http:/.CopyrightCopyright subsists
35、 in all BSI publications. BSI also holds the copyright, in theUK, of the publications of the international standardization bodies. Except aspermitted under the Copyright, Designs and Patents Act 1988 no extract maybe reproduced, stored in a retrieval system or transmitted in any form or by anymeans
36、electronic, photocopying, recording or otherwise without prior writtenpermission from BSI.This does not preclude the free use, in the course of implementing the standard,of necessary details such as symbols, and size, type or grade designations. Ifthese details are to be used for any other purpose than implementation then theprior written permission of BSI must be obtained.Details and advice can be obtained from the Copyright and Licensing Manager.Tel: +44 (0)20 8996 7070 Email:
