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1、BRITISH STANDARD BS EN ISO 15011-3:2002 Health and safety in welding and allied processes Laboratory method for sampling fume and gases generated by arc welding Part 3: Determination of ozone concentration using fixed point measurements The European Standard EN ISO 15011-3:2002 has the status of a B
2、ritish Standard ICS 13.040.40; 25.160.10 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:51:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 15011-3:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was pu
3、blished under the authority of the Standards Policy and Strategy Committee on 13 December 2002 BSI 13 December 2002 ISBN 0 580 40956 2 National foreword This British Standard is the official English language version of EN ISO 15011-3:2002. It is identical with ISO 15011-3:2002. The UK participation
4、in its preparation was entrusted to Technical Committee WEE/40, Health and safety in welding, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or Eu
5、ropean publications referred to in this document may be found 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
6、 all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquirie
7、s on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, pages 2 to 12, an inside
8、back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:51:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN ST
9、ANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15011-3 November 2002 ICS 13.040.40; 25.160.10 English version Health and safety in welding and allied processes - Laboratory method for sampling fume and gases generated by arc welding - Part 3: Determination of ozone concentration using fixed point mea
10、surements (ISO 15011-3:2002) Hygine et scurit en soudage et techniques connexes - Mthode de laboratoire dchantillonnage des fumes et des gaz mis par le soudage larc - Partie 3: Dtermination de la concentration en ozone laide dune mesure points fixes (ISO 15011-3:2002) Arbeits- und Gesundheitsschutz
11、beim Schweien und bei verwandten Verfahren - Laborverfahren zum Sammeln von Rauch und Gasen, die beim Lichtbogenschweien erzeugt werden - Teil 3: Bestimmung der Ozonkonzentration an festgelegten Messpunkten (ISO/DIS 15011-3:2002) This European Standard was approved by CEN on 2 May 2002. CEN members
12、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-date lists and bibliographical references concerning such national standards may be obtained on application t
13、o the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same stat
14、us as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR
15、STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15011-3:2002 E Licensed Copy: sheffieldun
16、sheffieldun, na, Sat Nov 18 01:51:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 15011-3:2002 (E) 2 Contents page Foreword3 Introduction.4 1Scope 5 2Normative references 5 3Terms and definitions5 4Principle5 5Procedure .6 5.1Position of Fixed Points6 5.2Welding test6 5.3Test location.6 6Measur
17、ement methods6 7Sampling equipment and procedure .7 7.1Sampling system7 7.2Ozone generator.7 7.3Test pieces7 7.4Analysis and results7 8Test report 7 Annex A (normative) Location of Fixed Points.8 Annex B (informative) Description of the UV radiation tube10 Annex C (informative) Test report.12 Licens
18、ed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:51:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 15011-3:2002 (E) 3 Foreword The text of EN ISO 15011-3:2002 as been prepared by Technical Committee CEN/TC 121 “Welding“, the secretariat of which is held by DS, in collaboration with Technica
19、l Committee ISO/TC 44 “Welding and allied processes”. This European Standard EN ISO 15011-3:2002 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2003, and conflicting national standards shall be withdrawn at the lat
20、est by May 2003. This standard consists of the following parts: - Part 1: Determination of emission rate and sampling for analysis of particulate fume; - Part 2: Determination of emission rates of gases and vapours, except ozone; - Part 3: Determination of ozone concentration using fixed point measu
21、rements. Annex A is normative. The annexes B and C are informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, G
22、reece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:51:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 15011-3:2002 (E) 4 Introduction Welding and allied pr
23、ocesses produce airborne particles and gaseous by-products, which can be harmful to human health. Knowledge of the quantity and composition of the airborne particles and gases emitted can be useful for occupational hygienists in assessing workplace atmospheres and in determining appropriate control
24、measures. Emission rates cannot be used directly to assess the welders exposure, but it is expected that processes, consumables and welding parameters giving lower emission rates will result in lower welder exposures than processes with high emission rates used in the same working situation. The pur
25、pose of this standard is not to measure the emission rate of ozone but to measure ozone concentrations around a welding arc. In this case, the measurement of lower ozone concentrations is expected to correlate with lower exposure to ozone in the work place under similar work conditions. Thus, this s
26、tandard allows the effect of changes in welding conditions on exposure to ozone, under similar conditions in the workplace, to be predicted and best practice with regard to ozone reducing measures to be defined. It has been assumed in the drafting of this standard that the executions of its provisio
27、ns, and the interpretation of the results obtained, is entrusted to appropriately qualified and experienced people. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:51:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 15011-3:2002 (E) 5 1 Scope This European Standard specifies a laborato
28、ry method for evaluating ozone emissions generated during arc welding by measuring ozone concentrations at fixed points around a stationary welding arc. The results can be used to compare the effect of welding parameters, processes, etc. on ozone generation and hence to predict changes in workplace
29、exposure under similar working conditions. 2 Normative references This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated r
30、eferences, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revisions. For undated references the latest edition of the publication referred to applies (including amendments). EN 482, Workplace atmospheres
31、 - General requirements for the performance of procedures for the measurement of chemical agents. EN 1076, Workplace atmospheres - Pumped sorbent tubes for the determination of gases and vapours - Requirements and test methods. EN 1540, Workplace atmospheres - Terminology. EN ISO 4063, Welding and a
32、llied processes Nomenclature of processes and reference numbers (ISO 4063:1998). EN ISO 108822, Health and safety in welding and allied processes Sampling of airborne particles and gases in the operators breathing zone Part 2: Sampling of gases (ISO 10882-2:2000). EN ISO 15011-1, Health and safety i
33、n welding and allied processes - Laboratory method for sampling fume and gases generated by arc welding - Part 1: Determination of emission rate and sampling for analysis of particulate fume (ISO 15011-1:2001). ISO 35341, Statistics - Vocabulary and symbols - Part 1: Probability and general statisti
34、cal terms. ISO 6879, Air quality - Performance characteristics and related concepts for air quality measuring methods. 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 1540, ISO 6879, EN ISO 108822, EN 482, EN 1076, ISO 35341, EN ISO 4063, EN
35、ISO 150111 and the following apply. 3.1 Fixed Point (FP) point of measurement at defined distances from the arc 4 Principle Arc welding is performed, on a test piece, in a chamber or room and ozone concentrations are measured at a Fixed Point relative to the arc. Additional measurements shall be mad
36、e at other Fixed Points (see clause 5), if required. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:51:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 15011-3:2002 (E) 6 5 Procedure 5.1 Position of Fixed Points It is mandatory to perform a measurement at the following Fixed Point: FP
37、1at a distance of 250 mm horizontally and vertically from the arc. FP1 corresponds to a typical position for the breathing zone of a welder. For further information, other measurements may be performed at the following Fixed Points: FP2at a distance of 300 mm vertically above the arc; this is normal
38、ly expected to be the area of maximum ozone concentration. FP3at a distance of 500 mm horizontally and vertically from the arc. These Fixed Points are illustrated in annex A. If measurements are made at several Fixed Points, the points shall be in the same vertical plane. 5.2 Welding test A welding
39、test shall involve a welding period of at least 1 minute during which the arc remains stationary and the test piece traverses underneath. During welding, ozone concentrations shall be measured and recorded and the average stable concentration calculated. 5.3 Test location The test shall be completed
40、 in a chamber or a room, such that the welding column can rise in an undisturbed way and does not give a continual increase in the measured concentration data. Placing a small extracted hood (see Figure A.2) at a defined distance above the arc (see Figure A.1) may reduce variations in the ozone conc
41、entrations measured at FP2. Before each further test, the test room shall be ventilated until the ozone concentration reaches background level. 6 Measurement methods Because of the instability of ozone, only direct reading apparatus is appropriate. Direct reading electrical instruments used for the
42、measurement of ozone most commonly work on one of the following principles: a) chemiluminescence; b) absorption of ultraviolet radiation; An alternative measurement method, the UV radiation tube, may also be used (see annex B). This equipment does not take into account any effects from chemical reac
43、tions with ozone or convection currents. Instrument response shall be checked before and after each test using a calibrated ozone generator. These three methods are expected to provide different absolute ozone concentrations but to provide a similar ranking of the measured values. Licensed Copy: she
44、ffieldun sheffieldun, na, Sat Nov 18 01:51:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 15011-3:2002 (E) 7 7 Sampling equipment and procedure 7.1 Sampling system The sampling line/s and probe/s shall be made of stainless steel or PTFE or a combination of both. Particulate fumes shall be prev
45、ented from entering the sampling line/s using filters. Filters shall be changed frequently to prevent the build up of particulate deposits, which may react with ozone and reduce the measured concentration. To ensure that the sample collection system will not reduce the ozone concentration in the sam
46、pled air, it is necessary to pass air containing at least 1 ppm ozone from an ozone generator through the collection system for at least 1 min, before sampling commences and after each filter change. 7.2 Ozone generator The ozone generator shall be calibrated using a suitable reference method. 7.3 T
47、est pieces Welding shall be performed on a test piece. All details concerning the test piece shall be recorded on the test report (see annex C). 7.4 Analysis and results Five tests shall be carried out at each Fixed Point evaluated. The individual average stable ozone concentration for each of the f
48、ive tests shall be calculated and the overall average stable ozone concentration calculated from those five values. The individual average stable ozone concentrations shall not differ from the overall average value by more than 25 %. If any of the individual average results do not fulfil this requir
49、ement, then five further tests shall be performed. The highest and the lowest individual average values shall then be discarded and a new overall average stable ozone concentration for the remaining eight tests shall be calculated. Each individual average value shall not differ from the new overall average for the eight tests by more than 25 %. If any of the individual average results of the remaining eight tests do not fulfil this requirement, then the tests shall