1、PD CEN/TR 15068:2009 ICS 25.160.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW PUBLISHED DOCUMENT Gas welding equipment Measurement of noise emitted by blowpipe for welding, cutting, heating, brazing and soldering Measurement methodThis Published Document was published und
2、er the authority of the Standards Policy and Strategy Committee on 30 April 2009 BSI 2009 ISBN 978 0 580 54758 4 Amendments/corrigenda issued since publication Date Comments PD CEN/TR 15068:2009 National foreword This Published Document is the UK implementation of CEN/TR 15068:2009. The UK participa
3、tion in its preparation was entrusted to Technical Committee WEE/18, Gas welding and cutting appliances. 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 a
4、re responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.PD CEN/TR 15068:2009 TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 15068 March 2009 ICS 25.160.30 English Version Gas welding equipment - Measurement of noise
5、emitted by blowpipe for welding, cutting, heating, brazing and soldering - Measurement method Matriel de soudage aux gaz - Mesurage du bruit mis par les chalumeaux destins au soudage, brasage, coupage et chauffage - Mthode de mesurage Gasschweigerte - Messungen fr von Brennern fr Schweien, Schneiden
6、, Wrmen, Hartlten und Weichlten erzeugte Gerusche - Messverfahren This 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, E
7、stonia, 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 COMIT EUROPEN DE NORMALISATION E
8、UROPISCHES KOMITEE FR 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 15068:2009: EPD CEN/TR 15068:2009 CEN/TR 15068:2009 (E) 2 Contents Page Foreword 3 1 Scope
9、4 2 Normative references 4 3 Terms and definitions .4 4 Measurement conditions 4 5 Procedure .6 6 Test results .6 7 Test report 6 PD CEN/TR 15068:2009 CEN/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
10、which is held by DIN. 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. PD CEN/TR 15068:2009 CEN/TR 15068:2009 (E) 4 1 Scope This Techni
11、cal Report specifies a test method for measuring the noise emitted 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 Norma
12、tive 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 13622:2002, Gas welding equipm
13、ent Terminology Terms used for gas welding equipment EN 61260, Electroacoustics 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, th
14、e terms and definitions given in EN 13622:2002 and EN 61672-1:2003 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
15、level, at least 1,5 m from the ceiling and at least at 5 m from the 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, F
16、igure 1). 4.2 Measurement and correction of background noise Measurements 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
17、blowpipe and background together by more than 6 dB. If difference of level is within 6 dB and 15 dB, calculate corrections of noise level according to Equation (1): dB ) 10 10 lg( 10 10 / 10 / pA b pA, sb pA, L L L = (1) where L pAis the corrected noise level emitted by the blowpipe, in decibels; L
18、pA,sbis the sound pressure level of the blowpipe and the background noise together, in decibels; PD CEN/TR 15068:2009 CEN/TR 15068:2009 (E) 5 L pA,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
19、 filters Sound level meters in accordance with at least class 1 requirements of EN 61672-1 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 characteris
20、tics meets at least the requirements of EN 61672-1 class 1. Octave-band filters, if they 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. Gaug
21、es which are used for the pressure measurements shall have an accuracy of 3 % regarding 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 pl
22、ane as the blowpipe flame. Measurement locations are situated at 1 m from the nozzle tip. Six measurements are performed at locations defined by letters a to f in Figure 1. The measured sound pressure levels are denoted L pA, measured,ato L pA, measured, f. NOTE Maximum noise emitted by a blowpipe i
23、s situated just in front of the nozzle surface plane. Beyond an angle depending on the nozzle, noise decreases again. Dimensions in millimetres View from the top Figure 1 Positions of the sensor of sound level meter PD CEN/TR 15068:2009 CEN/TR 15068:2009 (E) 6 5 Procedure The nominal gas supply cond
24、itions indicated by the manufacturer (gas type, pressure and flow rate) shall be applied to 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 conditi
25、ons specified in Clause 4. 6 Test results For each blowpipe/nozzle couple, the maximum value, of the six performed measurements, corrected if necessary (see 4.2), is retained as the A-weighted emission sound pressure level, L pA couple.7 Test report Test report shall include at least the following i
26、ndications: a) date of test; b) name and address of body which performed measurements; c) measurements 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
27、blowpipe; A-weighted emission sound pressure level, L pA couple , (see Clause 6). f) reference to this standard. PD CEN/TR 15068:2009 This page has been intentionally left blankPD CEN/TR 15068:2009 BSI Group Headquarters 389 Chiswick High Road, London, W4 4AL, UK Tel +44 (0)20 8996 9001 Fax +44 (0)2
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