BS EN ISO 15011-2-2009 Health and safety in welding and allied processes - Laboratory method for sampling fume and gases - Determination of the emission rates of carbon monoxide (Cn.pdf

1、BS EN ISO 15011-2:2009ICS 13.040.40; 13.100; 25.160.10NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDHealth and safety in welding and allied processes Laboratory method for sampling fume and gasesPart 2: Determination of the emission rates of carbon monoxide (C

2、O), carbon dioxide (CO2), nitrogen monoxide (NO) and nitrogen dioxide (NO2) during arc welding, cutting and gouging (ISO 15011-2:2009)This British Standardwas published underthe authority of theStandards Policy andStrategy Committee on 30November 2009. BSI 2009ISBN 978 0 580 55939 6Amendments/corrig

3、enda issued since publicationDate CommentsBS EN ISO 15011-2:2009National forewordThis British Standard is the UK implementation of EN ISO15011-2:2009. It supersedes BS EN ISO 15011-2:2003 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/40, Health and

4、 safety in welding.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 correct application.Compliance with a British Standard cannot conf

5、er immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15011-2 October 2009 ICS 25.160.10; 13.100 Supersedes EN ISO 15011-2:2003English Version Health and safety in welding and allied processes - Laboratory method for sampling fume and gases - Part 2: Determinatio

6、n of the emission rates of carbon monoxide (CO), carbon dioxide (CO2), nitrogen monoxide (NO) and nitrogen dioxide (NO2) during arc welding, cutting and gouging (ISO 15011-2:2009) Hygine et scurit en soudage et techniques connexes - Mthode de laboratoire dchantillonnage des fumes et des gaz - Partie

7、 2: Dtermination des dbits dmission du monoxyde de carbone (CO), du dioxyde de carbone (CO2), du monoxyde dazote (NO) et du dioxyde dazote (NO2) lors du soudage larc, du coupage et du gougeage (ISO 15011-2:2009) Arbeits- und Gesundheitsschutz beim Schweien und bei verwandten Verfahren - Laborverfahr

8、en zum Sammeln von Rauch und Gasen - Teil 2: Bestimmung der Emissionsraten von Kohlenmonoxid (CO), Kohlendioxid (CO2), Stickstoffmonoxid (NO) und Stickstoffdioxid (NO2) beim Lichtbogenschweien, Schneiden und Fugenhobeln (ISO 15011-2:2009) This European Standard was approved by CEN on 29 September 20

9、09. CEN 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-date lists and bibliographical references concerning such national standards may be obtained

10、on application to the CEN 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 CEN Management

11、Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, P

12、oland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and b

13、y any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15011-2:2009: EBS EN ISO 15011-2:2009EN ISO 15011-2:2009 (E) 3 Foreword This document (EN ISO 15011-2:2009) has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes” in collaboration with Technical Commi

14、ttee CEN/TC 121 “Welding” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2010, and conflicting national standards shall be withdrawn at the latest b

15、y April 2010. 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. This document supersedes EN ISO 15011-2:2003. According to the CEN/CENEL

16、EC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembo

17、urg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 15011-2:2009 has been approved by CEN as a EN ISO 15011-2:2009 without any modification. BS EN ISO 15011-2:2009ISO 15011-2:2009(E) ISO

18、 2009 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Principle .2 5 Equipment and materials2 6 Test procedures.4 6.1 Welding procedure selection .4 6.2 Setting up the test equipment4 6.3 Blank test .5 6.4 Manual metal arc

19、 welding.5 6.5 Continuous wire processes and autogeneous TIG welding.5 6.6 Cutting and gouging .6 7 Calculating and reporting the results7 Annex A (informative) Possible designs of hood 8 Annex B (informative) Equipment notes.10 Annex C (informative) Welding parameters for gas-shielded arc welding .

20、12 Annex D (normative) Test procedures15 Annex E (normative) Calculation of the average stable gas concentration .16 Annex F (normative) Test report .17 Bibliography18 BS EN ISO 15011-2:2009ISO 15011-2:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardiz

21、ation) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be

22、 represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standar

23、ds are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Intern

24、ational Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15011-2

25、was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 9, Health and safety. This second edition cancels and replaces the first edition (15011-2:2003), which has been technically revised. ISO 15011 consists of the following parts, under the general title Health

26、and safety in welding and allied processes Laboratory method for sampling fume and gases: Part 1: Determination of fume emission rate during arc welding and collection of fume for analysis Part 2: Determination of the emission rates of carbon monoxide (CO), carbon dioxide (CO2), nitrogen monoxide (N

27、O) and nitrogen dioxide (NO2) during arc welding, cutting and gouging Part 3: Determination of ozone emission rate during arc welding Part 4: Fume data sheets Part 5: Identification of thermal-degradation products generated when welding or cutting through products composed wholly or partly of organi

28、c materials The following part is under preparation: Part 6: Procedure for quantitative determination of fume and gases from resistance spot welding Technical Specification Request for an official interpretation of technical aspects of this part of ISO 15011 should be directed to the secretariat of

29、ISO/TC 44/SC 9 via the users national standardization body; a listing of these bodies can be found at www.iso.org. BS EN ISO 15011-2:2009ISO 15011-2:2009(E) ISO 2009 All rights reserved vIntroduction Welding and allied processes generate fume and gases, which, if inhaled, can be harmful to human hea

30、lth. Knowledge of the composition and the emission rate of the fume and gases can be useful to occupational health professionals in assessing worker exposure and in determining appropriate control measures. Absolute exposure is dependent upon factors such as welder position with respect to the plume

31、 and draughts and cannot be predicted from emission rate data. However, in the same work situation, a higher emission rate is expected to correlate with a higher exposure and a lower emission rate with a lower exposure. Hence, emission rate data can be used to predict relative changes in exposure th

32、at might occur in the workplace under different welding conditions and to identify measures for reducing such exposure, but they cannot be used to calculate ventilation requirements. This part of ISO 15011 specifies a method for measuring the emission rate of carbon monoxide (CO), carbon dioxide (CO

33、2), nitrogen monoxide (NO) and nitrogen dioxide (NO2) during arc welding, cutting and gouging using a hood technique. The procedure simply prescribes a methodology, leaving selection of the test parameters to the user, so that the effect of different variables can be evaluated. It is assumed that th

34、e executions of the provisions and the interpretation of the results obtained in this part of ISO 15011 are entrusted to appropriately qualified and experienced people. BS EN ISO 15011-2:2009BS EN ISO 15011-2:2009INTERNATIONAL STANDARD ISO 15011-2:2009(E) ISO 2009 All rights reserved 1Health and saf

35、ety in welding and allied processes Laboratory method for sampling fume and gases Part 2: Determination of the emission rates of carbon monoxide (CO), carbon dioxide (CO2), nitrogen monoxide (NO) and nitrogen dioxide (NO2) during arc welding, cutting and gouging 1 Scope This part of ISO 15011 define

36、s laboratory methods for measuring the emission rates of carbon monoxide (CO), carbon dioxide (CO2), nitrogen monoxide (NO) and nitrogen dioxide (NO2) generated during arc welding, cutting and gouging, using a hood technique. The methodology is suitable for use with all open arc welding processes, c

37、utting and gouging but different designs of hood are used depending on the process and whether or not it can be conducted automatically. The method can be used to evaluate the effects of welding wires, welding parameters, processes, shielding gases, test piece composition and test piece surface cond

38、ition on emission rate. 2 Normative 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. IS

39、O/TR 25901, Welding and related processes Vocabulary ISO/IEC Guide 98-3, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/TR 25901 and the following ap

40、ply. 3.1 bubble flow meter primary device for measuring gas flow rate, where the time for a bubble of gas, defined by a soap film, to pass through a calibrated volume in a vertical tube is measured 3.2 test chamber semi-enclosed, continuously extracted chamber used in emission rate tests performed d

41、uring arc welding, cutting or gouging operations BS EN ISO 15011-2:2009ISO 15011-2:2009(E) 2 ISO 2009 All rights reservedNOTE Test chambers generally fall into three generic types: A test chamber without a floor, widely referred to as a “hood”; A test chamber having a floor, widely referred to as a

42、“fume box”; A “fume box”, in which the floor of the test chamber is easily removed and replaced, facilitating its ready interconversion to and from a “hood”. 4 Principle Arc welding, cutting or gouging is performed, inside a semi-enclosed, continuously extracted test chamber of the “hood” type. Gas

43、concentrations (in millilitres per cubic metre) at a sampling position and the air flow rate (in cubic metres per minute) through the hood are measured. Gas emission rates (in millilitres per minute) are calculated by multiplying their concentrations at the sampling position by the air flow rate. 5

44、Equipment and materials 5.1 Hood, semi-enclosed, continuously extracted chamber of the “hood” type, in which gas emission rate tests are performed during arc welding, cutting and gouging. Examples of possible hood designs are given in Annex A. Hoods with shapes and dimensions similar to those shown

45、in Figure A.1 are appropriate for measuring gas emission rates during arc welding. Hoods similar to those shown in Figure A.2 are appropriate for measuring gas emission rates during cutting and gouging. See B.1 for guidance on the gas sampling position. 5.2 Extraction unit, capable of maintaining an

46、 adequate air flow rate through the hood (5.1), such that all gases emitted are contained, but not so high as to compromise the integrity of the process (see B.2). The precise characteristics of the extraction unit are not critical. 5.3 Sampling system, consisting of a sampling line between the samp

47、ling point and the equipment, for measuring gas concentration. The sampling line shall be of small internal diameter (10 mm or less) and as short as reasonably practicable. Fume shall be prevented from entering the sampling line using a filter placed as close as is reasonably practicable to the samp

48、ling point. See B.3. 5.4 Instrument for measuring carbon monoxide, which is direct reading and which works on one of the following principles: dispersive infra-red absorption and non-dispersive infra-red absorption, used with or without filters to reduce interference from carbon dioxide; diffusion o

49、f carbon monoxide through a semi-permeable membrane at a rate proportional to the concentration, followed by electrochemical oxidation of the gas at a potential-controlled electrode and by measurement of the current produced; gas chromatography. The instrument shall have a working range that covers the range of CO concentrations to be measured and have a logging capability or be connected to a digital logging system with a logging frequency of 1 s or less. See B.4. The instrument calibration shall be traceab