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1、 Reference number ISO 15011-2:2003(E) ISO 2003 INTERNATIONAL STANDARD ISO 15011-2 First edition 2003-05-01 Health and safety in welding and allied processes Laboratory method for sampling fume and gases generated by arc welding Part 2: Determination of emission rates of gases, except ozone Hygine et
2、 scurit en soudage et techniques connexes Mthode de laboratoire dchantillonnage des fumes et des gaz mis par le soudage larc Partie 2: Dtermination du taux dmission des gaz, lexception de lozone Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=
3、NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 04:04:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 15011-2:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or
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6、ble for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
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8、pyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2003 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 04:04:38 MDTNo reproduction or networking
9、permitted without license from IHS -,-,- ISO 15011-2:2003(E) ISO 2003 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carrie
10、d 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 represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS
11、O collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare Internatio
12、nal Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the ele
13、ments 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 was prepared by the European Committee for Standardization (CEN) in collaboration with Technical Committee ISO/TC 44, Welding and allied processes,
14、 Subcommittee SC 9, Health and safety, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). Throughout the text of this document, read “.this European Standard.“ to mean “.this International Standard.“. ISO 15011 consists of the following parts, under the
15、 general title Health and safety in 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 Part 2: Determination of emission rates of gases, except ozone Part 3: Determi
16、nation of ozone concentration using fixed point measurements Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 04:04:38 MDTNo reproduction or networking permitted without license f
17、rom IHS -,-,- ISO 15011-2:2003(E) iv ISO 2003 All rights reserved Contents page Foreword. v Introduction . vi 1Scope 1 2Normative references . 1 3Terms and definitions. 2 4Principle. 2 5Measurement methods. 2 5.1Gases 2 5.2Fume box air flow rate 3 6Equipment 3 6.1Fume box . 3 6.2Ventilator or pump 3
18、 7Sampling 3 7.1Sampling position. 3 7.2Sampling equipment. 3 7.3Sample filtration 4 7.4Multiple sampling 4 7.5Volume of sampling line. 4 7.6Sampling flow rate 4 7.7Fume box ventilation air flow rate. 4 7.8Handling of temperature, pressure and humidity data . 4 8Measurement of individual gases 5 8.1
19、General. 5 8.2Carbon monoxide 5 8.3Carbon dioxide 5 8.4Nitrogen oxide and nitrogen dioxide. 5 9Test report 6 Annex A (informative) Organic gases. 7 Annex B (informative) Examples of fume box arrangements for determination of emission rates of gases in arc welding, except ozone 8 Annex C (informative
20、) Test report. 10 Bibliography . 11 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 04:04:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 15011-2
21、:2003(E) ISO 2003 All rights reserved v Foreword The text of EN ISO 15011-2:2003 has been prepared by Technical Committee CEN/TC 121 “Welding“, the secretariat of which is held by DS, in collaboration with Technical Committee ISO/TC 44 “Welding and allied processes”. This European Standard shall be
22、given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2003, and conflicting national standards shall be withdrawn at the latest by November 2003. This standard consists of the following parts: - Part 1: Determination of emiss
23、ion 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 measurements. The annexes A, B and C are informative. According to the CEN/CENELEC Internal Regulatio
24、ns, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden,
25、 Switzerland and the United Kingdom. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 04:04:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 15011-
26、2:2003(E) vi ISO 2003 All rights reserved Introduction Welding and allied processes 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 hygienist
27、s in assessing workplace atmospheres and in determining appropriate control measures. Emission rates cannot be used directly to assess the welders exposure, but it is expected that processes, consumables and welding parameters giving low emission rates will result in lower welder exposures than proc
28、esses with high emission rates used in the same working situation. The laboratory procedure described in this standard can be used to determine the emission rate of gases generated by arc welding and provides a method of sampling the gases for chemical analysis. The gases generated and their emissio
29、n rates depend upon the welding process, welding parameters, work piece surface, coatings, etc. In the context of this standard emission rate means the total amount of a substance per unit time that is produced under defined process conditions, by different reactions in the system defined in this st
30、andard. Gases encountered in arc welding are so numerous that it would be impracticable to cover them all in this standard. The scope of this standard has therefore been limited to those gases, which are commonly generated during arc welding. It has been assumed in the drafting of this standard that
31、 the executions of its provisions, and the interpretation of the results obtained, is entrusted to appropriately qualified and experienced people. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Re
32、sale, 04/20/2007 04:04:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 15011-2:2003(E) ISO 2003 All rights reserved 1 1 Scope This European Standard provides guidance on the determination of emission rates of gases generated by arc welding using a fume box technique.
33、 It describes the test principle, gives a possible fume box arrangement and considers methods for sampling and analysis. The following gases that can be produced during arc welding are covered: - Carbon monoxide (CO); - Carbon dioxide (CO2); - Nitrogen oxide (NO); - Nitrogen dioxide (NO2). The fume
34、box described in this standard can also be used for the determination of organic gases produced in the arc welding of coated metals, e.g. primed, painted or plastic coated material (see annex A for further information). Ozone is considered in EN ISO 15011-3. 2 Normative references This European Stan
35、dard 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 references, subsequent amendments to or revisions of any of these publications apply
36、to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 482, Workplace atmospheres - General requirements for the performance of procedures for the measurement of chem
37、ical 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 45544-1, Workplace atmospheres - Electrical apparatus used for the direct detection and direct concentration m
38、easurement of toxic gases and vapours Part 1: General requirements and test methods. EN ISO 4063, Welding and allied 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
39、 the operators breathing zone Part 2: Sampling of gases (ISO 10882-2:2000). ISO 35341, Statistics - Vocabulary and symbols - Part 1: Probability and general statistical terms. ISO 51671, Measurements of fluid flow by means of pressure differential devices - Part 1: Orifice plates, nozzles and Ventur
40、i tubes inserted in circular cross sections conduits running full. ISO 6879, Air quality - Performance characteristics and related concepts for air quality measuring methods. ISO 8756, Air quality - Handling of temperature, pressure and humidity data. Copyright International Organization for Standar
41、dization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 04:04:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 15011-2:2003(E) 2 ISO 2003 All rights reserved 3 Terms and definitions For the purposes of
42、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 and the following apply. 3.1 fume box closed or semi-closed ventilated chamber used for sampling and determination (emission rate and composition) of fume and gases in
43、 welding and allied processes 4 Principle Arc welding is performed in a fume box suitable for the process. During testing the gases produced are captured and continuously extracted from the fume box using a ventilator or pump. The emission rates of gases are calculated by multiplication of the gas c
44、oncentration in the outlet air and the air flow rate. 5 Measurement methods 5.1 Gases 5.1.1 General A complex mixture of particulates and gases is produced by most arc welding processes, and, whatever method of sampling and analysis is selected, it is necessary to confirm that techniques, which have
45、 been used successfully for other applications, are suitable for use with emission rate measurements. Particular attention shall be paid to the possibility of interference with the determination of one gas by the presence of another. For fume box testing of arc welding processes, the concentrations
46、of gases can be determined using either direct or indirect methods. Direct reading electrical apparatus is generally most appropriate for the measurement of gases. Indirect methods, which involve laboratory analysis of samples collected using a suitable solid or liquid sorbent, are most appropriate
47、for the determination of organic gases, which can be produced in the arc welding of metals having paint or other coatings. 5.1.2 Direct methods Direct reading instruments, that can be accurately calibrated, are available for the measurement of gases covered by this standard. Analysis is usually perf
48、ormed on an air sample drawn through the instrument using a pump. Measurements that involve the use of spectrometry or an electrochemical sensor, can be made directly or indirectly following reaction of the sample with solids, liquids or gases. Both pumped and diffusive detector tubes provide a direct method of gas analysis but they are not sufficiently accurate for measurements involving fume box testing. 5.1.3 Indirect methods Indirect methods have separate sampling and analysis stages and invol