SIST EN ISO 15011-3:2010

SLOVENSKI STANDARD
SIST EN ISO 15011-3:2010
01-april-2010
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SIST EN ISO 15011-3:2003
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Health and safety in welding and allied processes - Laboratory method for sampling fume
and gases - Part 3: Determination of ozone emission rate during arc welding (ISO 15011-
3:2009)
Arbeits- und Gesundheitsschutz beim Schweißen und bei verwandten Verfahren -
Laborverfahren zum Sammeln von Rauch und Gasen - Teil 3: Bestimmung der
Emissionsrate von Ozon (ISO 15011-3:2009)
Hygiène et sécurité en soudage et techniques connexes - Méthode de laboratoire
d'échantillonnage des fumées et des gaz - Partie 3: Détermination du débit d'émission
d'ozone lors du soudage à l'arc (ISO 15011-3:2009)
Ta slovenski standard je istoveten z: EN ISO 15011-3:2009
ICS:
13.100 Varnost pri delu. Industrijska Occupational safety.
higiena Industrial hygiene
25.160.10 Varilni postopki in varjenje Welding processes
SIST EN ISO 15011-3:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 15011-3:2010

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SIST EN ISO 15011-3:2010


EUROPEAN STANDARD
EN ISO 15011-3

NORME EUROPÉENNE

EUROPÄISCHE NORM
October 2009
ICS 25.160.10; 13.100 Supersedes EN ISO 15011-3:2002
English Version
Health and safety in welding and allied processes - Laboratory
method for sampling fume and gases - Part 3: Determination of
ozone emission rate during arc welding (ISO 15011-3:2009)
Hygiène et sécurité en soudage et techniques connexes - Arbeits- und Gesundheitsschutz beim Schweißen und bei
Méthode de laboratoire d'échantillonnage des fumées et verwandten Verfahren - Laborverfahren zum Sammeln von
des gaz - Partie 3: Détermination du débit d'émission Rauch und Gasen - Teil 3: Bestimmung der Emissionsrate
d'ozone lors du soudage à l'arc (ISO 15011-3:2009) von Ozon beim Lichtbogenschweißen (ISO 15011-3:2009)
This European Standard was approved by CEN on 29 September 2009.

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 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 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, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.






EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15011-3:2009: E
worldwide for CEN national Members.

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SIST EN ISO 15011-3:2010
EN ISO 15011-3:2009 (E)
Contents Page
Foreword .3

2

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SIST EN ISO 15011-3:2010
EN ISO 15011-3:2009 (E)
Foreword
This document (EN ISO 15011-3:2009) has been prepared by Technical Committee ISO/TC 44 “Welding and
allied processes” in collaboration with Technical Committee 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 by 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 15011-3:2002.
According to the CEN/CENELEC 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, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 15011-3:2009 has been approved by CEN as a EN ISO 15011-3:2009 without any
modification.

3

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SIST EN ISO 15011-3:2010

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SIST EN ISO 15011-3:2010

INTERNATIONAL ISO
STANDARD 15011-3
Second edition
2009-10-15


Health and safety in welding and allied
processes — Laboratory method for
sampling fume and gases —
Part 3:
Determination of ozone emission rate
during arc welding
Hygiène et sécurité en soudage et techniques connexes — Méthode de
laboratoire d'échantillonnage des fumées et des gaz —
Partie 3: Détermination du débit d'émission d'ozone lors du soudage à
l'arc




Reference number
ISO 15011-3:2009(E)
©
ISO 2009

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SIST EN ISO 15011-3:2010
ISO 15011-3:2009(E)
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©  ISO 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
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Published in Switzerland

ii © ISO 2009 – All rights reserved

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SIST EN ISO 15011-3:2010
ISO 15011-3:2009(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Principle .2
5 Equipment and materials.2
6 Tests procedures.4
6.1 Welding procedure selection .4
6.2 Setting up the test equipment.4
6.3 Trial tests.5
6.4 Emission rate testing .5
7 Calculating and reporting the results.6
Annex A (informative) Equipment notes.7
Annex B (informative) Welding parameters for ozone emission rate testing.9
Annex C (normative) Test procedures.11
Annex D (normative) Calculation of the average stable ozone concentration.12
Annex E (normative) Test report .13
Bibliography.14

© ISO 2009 – All rights reserved iii

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SIST EN ISO 15011-3:2010
ISO 15011-3:2009(E)
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 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 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 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 International 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 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 15011-3 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 (15011-3:2002), which has been technically revised.
ISO 15011 consists of the following parts, under the general title Health 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 (CO ), nitrogen
2
monoxide (NO) and nitrogen dioxide (NO ) during arc welding, cutting and gouging
2
⎯ 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 organic 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 ISO/TC 44/SC 9 via the user’s national standardization body; a listing of these bodies can be
found at www.iso.org.
iv © ISO 2009 – All rights reserved

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SIST EN ISO 15011-3:2010
ISO 15011-3:2009(E)
Introduction
Welding and allied processes generate fume and gases, which, if inhaled, can be harmful to human health.
Knowledge of the composition and the emission rates 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 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 that 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 defines a method for measuring the emission rate of ozone during arc welding using a
hood technique. The procedure simply prescribes a methodology, leaving selection of the test parameters to
[2]
the user, so that the effects of different variables can be evaluated. Research has shown that differences in
ozone emission rate measured using this technique correlate well with changes in exposure in the workplace.
It is assumed that the 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.
© ISO 2009 – All rights reserved v

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SIST EN ISO 15011-3:2010

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SIST EN ISO 15011-3:2010
INTERNATIONAL STANDARD ISO 15011-3:2009(E)

Health and safety in welding and allied processes — Laboratory
method for sampling fume and gases —
Part 3:
Determination of ozone emission rate during arc welding
1 Scope
This part of ISO 15011 defines a laboratory method for measuring the emission rate of ozone during arc
welding, using a hood technique. The method is directed primarily at measuring ozone emission rate when
using gas-shielded arc welding processes, but it can also be employed with other processes, e.g. self-
shielded flux-cored arc welding, provided that welding can be performed automatically under the hood.
The method can be used to evaluate the effects of welding wires, welding parameters, processes, shielding
gases, test piece composition and test piece surface condition 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.
ISO/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 apply.
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 during arc welding,
cutting or gouging operations
NOTE 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 “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”.
© ISO 2009 – All rights reserved 1

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SIST EN ISO 15011-3:2010
ISO 15011-3:2009(E)
4 Principle
Arc welding is performed automatically, on a test piece, inside a continuously extracted test chamber of the
“hood” type. The ozone concentration (in millilitres per cubic metre) at a fixed sampling position inside the
hood and the air flow rate through the hood (in cubic metres per minute) are measured. The ozone emission
rate (in millilitres per minute) is calculated by multiplying the ozone concentration at the fixed measuring point
by the air flow rate.
5 Equipment and materials
5.1 Hood, semi-enclosed, continuously extracted chamber of the “hood” type, in which ozone emission rate
tests are performed during arc welding. The hood shall be designed in accordance with the dimensions shown
in Figure 1. The sampling position shall be 1 000 mm vertically from the base of the hood. The inside of the
hood shall be non-reflecting.
NOTE See A.1 for guidance on the construction of the hood.
3
5.2 Extraction unit, capable of maintaining an air flow rate of 2 m /min through the hood (5.1), such that
the ozone emitted is contained, but not so high as to compromise weld metal integrity (see A.2). The precise
characteristics of the extraction unit are not critical.
5.3 Ozone meter and logging system, consisting of a calibrated ozone meter employing the
chemiluminescence principle of measurement. The meter shall be capable of measuring ozone concentrations
3
up to 10 ml/m . The ozone meter shall be connected to a digital logging system with a logging frequency of
1 s or less (see A.3). Ozone meters that provide equivalent performance to that obtained with
chemiluminescence meters may also be used.
The calibration of the meter shall be traceable to national standards.
5.4 Sampling system, consisting of a sampling line between the sampling point and the ozone meter,
manufactured from polytetrafluoroethylene (PTFE) or stainless steel or a combination of both. The sampling
line shall have an internal diameter of 10 mm or less and shall be as short as is reasonably practicable. Fume
shall be prevented from entering the sampling line using a PTFE filter. The filter shall be placed as close as is
reasonably practicable to the sampling point (see A.4).
5.5 Ozone generator, used to precondition the sampling line and to calibrate the ozone meter.
NOTE Sometimes, ozone meters and generators are incorporated into the same piece of equipment.
If an ozone generator is used to calibrate the ozone meter (5.3), its calibration shall be traceable to national
standards.
2 © ISO 2009 – All rights reserved

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SIST EN ISO 15011-3:2010
ISO 15011-3:2009(E)
Dimensions in millimetres

Key
1 damper (if used)
2 extraction unit
3 manometer (if used)
4 polytetrafluoroethylene (PTFE) filter
5 ozone meter connected to sampling point
6 welding torch
7 hood
8 test piece
9 traverse
a
Air flow rate measuring point.
Figure 1 — Hood design for ozone emission rate testing
3
5.6 Equipment for measuring air flow rate, capable of measuring an air flow rate of 2 m /min to within
± 5 % or better.
The following combinations of equipment are suitable (see A.5).
⎯ A calibrated anemometer, together with a calibrated ruler, to measure the diameter (in metres) of the
extraction ducting between the hood and the extraction unit. The calibrations of the anemometer and the
ruler shall be traceable to national standards. The anemometer shall, itself, have a logging capability or
be connected to a logging system with a logging frequency of 1 s or less.
⎯ A flow meter with a calibrated relationship between pressure difference and air flow rate, e.g. an orifice
plate, together with a digital manometer with a reading accuracy of at least 0,1 Pa to measure the
pressure difference across it. The calibration of the flow meter and the digital manometer shall be
traceable to national standards. The digital manometer shall, itself, have a logging capability or be
connected to a logging system with a logging frequency of 1 s or less.
⎯ A device for measuring air flow rate with equivalent performance.
The calibration of the equipment shall be traceable t
...