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 (ISO 15011-1:2009)

ISO 15011-1:2009 defines a laboratory method for measuring the emission rate of fume from arc welding. It also defines a method of collecting the fume for subsequent analysis and refers to suitable analytical techniques. The methods described are suitable for use with all open arc welding processes except tungsten inert gas (TIG) welding, which produces little fume.

Arbeits- und Gesundheitsschutz beim Schweißen und bei verwandten Verfahren - Laborverfahren zum Sammeln von Rauch und Gasen - Teil 1: Bestimmung der Rauchemissionsrate beim Lichtbogenschweißen und Sammeln von Rauch zur Analyse (ISO 15011-1:2009)

Dieser Teil der ISO 15011 legt ein Laborverfahren zum Messen der Emissionsrate von Rauch beim Lichtbogen¬schweißen fest. Er legt ebenfalls ein Verfahren zum Sammeln von Rauch für die anschließende Analyse fest und verweist auf geeignete analytische Techniken. Die beschriebenen Methoden sind geeignet für alle Schwei߬verfahren mit offenem Lichtbogen, mit Ausnahme des Wolfram-Inertgas-Schweißens (WIG), bei dem wenig Rauch erzeugt wird.
Das Verfahren mit der Emissionsrate kann zur Bewertung der Auswirkungen von Schweißelektroden, Drähten, Schweißparametern, Verfahren, Schutzgasen, Zusammensetzung des Prüfstücks und der Oberflächen-beschaffenheit des Prüfstücks auf die Emissionsrate von Rauch verwendet werden. Die anschließende Analyse des gesammelten Rauches, die Auswirkungen der Prüfparameter auf die Rauchzusammensetzung kann ebenso bestimmt werden.

Hygiène et sécurité en soudage et techniques connexes - Méthode de laboratoire d'échantillonnage des fumées et des gaz - Partie 1: Détermination du débit d'émission de fumée lors du soudage à l'arc et collecte des fumées pour analyse (ISO 15011-1:2009)

L'ISO 15011-1:2009 définit une méthode de laboratoire permettant de mesurer le débit d'émission de fumée lors du soudage à l'arc. Elle définit également une méthode permettant de collecter les fumées en vue d'une analyse ultérieure et fait référence à des techniques analytiques adéquates. Les méthodes décrites peuvent être utilisées avec tous les procédés de soudage à l'arc visible, à l'exception du soudage à l'arc sous protection de gaz inerte avec électrode de tungstène (TIG), qui produit peu de fumée.

Zdravje in varnost pri varjenju in sorodnih postopkih - Laboratorijska metoda za vzorčenje dima in plinov - 1. del: Določevanje emisij prahu in vzorčenje za analizo prahu (ISO 15011-1:2009)

Ta del ISO 15011 določa laboratorijsko metodo za merjenje emisij ozona med obločnim varjenjem z uporabo tehnike z varovalnim okrovom. Metoda je namenjena predvsem merjenju emisije ozona med obločnim varjenjem v zaščitnem plinu, lahko pa se uporabi tudi pri drugih postopkih, npr. pri obločnem varjenju s polnjeno žico s samozaščito, pod pogojem, da varjenje poteka avtomatsko pod varovalnim okrovom. Metoda se lahko uporablja za vrednotenje učinkov žic za varjenje, varilnih parametrov, postopkov, zaščitnih plinov, sestave preskusnih kosov in stanja površine preskusnega kosa na emisijo.

General Information

Status
Published
Publication Date
14-Oct-2009
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
15-Oct-2009
Completion Date
15-Oct-2009

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SIST EN ISO 15011-1:2010
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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 (ISO 15011-1:2009)
Arbeits- und Gesundheitsschutz beim Schweißen und bei verwandten Verfahren -
Laborverfahren zum Sammeln von Rauch und Gasen - Teil 1: Bestimmung der
Rauchemissionsrate beim Lichtbogenschweißen und Sammeln von Rauch zur Analyse
(ISO 15011-1:2009)
Hygiène et sécurité en soudage et techniques connexes - Méthode de laboratoire

d'échantillonnage des fumées et des gaz - Partie 1: Détermination du débit d'émission de

fumée lors du soudage à l'arc et collecte des fumées pour analyse (ISO 15011-1:2009)

Ta slovenski standard je istoveten z: EN ISO 15011-1:2009
ICS:
13.100 Varnost pri delu. Industrijska Occupational safety.
higiena Industrial hygiene
25.160.10 Varilni postopki in varjenje Welding processes
SIST EN ISO 15011-1:2010 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 15011-1:2010
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SIST EN ISO 15011-1:2010
EUROPEAN STANDARD
EN ISO 15011-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2009
ICS 13.100; 25.160.10 Supersedes EN ISO 15011-1:2002
English Version
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 (ISO 15011-1:2009)

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 1: Détermination du débit d'émission de Rauch und Gasen - Teil 1: Bestimmung der

fumée lors du soudage à l'arc et collecte des fumées pour Rauchemissionsrate beim Lichtbogenschweißen und

analyse (ISO 15011-1:2009) Sammeln von Rauch zur Analyse (ISO 15011-1:2009)
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 15011-1:2009: E

worldwide for CEN national Members.
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SIST EN ISO 15011-1:2010
EN ISO 15011-1:2009 (E)
Contents Page

Foreword ..............................................................................................................................................................3

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SIST EN ISO 15011-1:2010
EN ISO 15011-1:2009 (E)
Foreword

This document (EN ISO 15011-1:2009) 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 15011-1:2002.

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 15011-1:2009 has been approved by CEN as a EN ISO 15011-1:2009 without any

modification.
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SIST EN ISO 15011-1:2010
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SIST EN ISO 15011-1:2010
INTERNATIONAL ISO
STANDARD 15011-1
Second edition
2009-10-15
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
Hygiène et sécurité en soudage et techniques connexes — Méthode de
laboratoire d'échantillonnage des fumées et des gaz —
Partie 1: Détermination du débit d’émission de fumée lors du soudage à
l’arc et collecte des fumées pour analyse
Reference number
ISO 15011-1:2009(E)
ISO 2009
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SIST EN ISO 15011-1:2010
ISO 15011-1:2009(E)
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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 15011-1:2010
ISO 15011-1:2009(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...................................................................................................................................3

6.1 Welding procedure selection ...............................................................................................................3

6.2 Manual metal arc welding.....................................................................................................................3

6.3 Continuous wire processes .................................................................................................................5

6.4 Analysis of the fume collected.............................................................................................................7

7 Calculating and reporting the results..................................................................................................7

Annex A (informative) Possible designs of test chamber ..............................................................................8

Annex B (informative) Equipment notes.........................................................................................................14

Annex C (informative) Welding parameters ...................................................................................................16

Annex D (normative) Test procedures............................................................................................................18

Annex E (normative) Test report .....................................................................................................................19

Bibliography......................................................................................................................................................20

© ISO 2009 – All rights reserved iii
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SIST EN ISO 15011-1:2010
ISO 15011-1:2009(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 15011-1 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 (ISO 15011-1:2002), 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

monoxide (NO) and nitrogen dioxide (NO ) 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 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 15011-1:2010
ISO 15011-1:2009(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 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 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 specifies a method for measuring fume emission rate and for collecting fume for

subsequent analysis. The procedure simply prescribes a methodology, leaving selection of the test

parameters to the user, so that the effects of different variables can be evaluated.

Emission rates vary considerably depending upon the exact test conditions; therefore, test parameters are

prescribed in ISO 15011-4 for the generation of fume emission rate data, which can be used for comparing

emission rates of welding consumables.

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 15011-1:2010
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SIST EN ISO 15011-1:2010
INTERNATIONAL STANDARD ISO 15011-1:2009(E)
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
1 Scope

This part of ISO 15011 defines a laboratory method for measuring the emission rate of fume from arc welding.

It also defines a method of collecting the fume for subsequent analysis and refers to suitable analytical

techniques. The methods described are suitable for use with all open arc welding processes except tungsten

inert gas (TIG) welding, which produces little fume.

The emission rate method can be used to evaluate the effects of welding electrodes and wires, welding

parameters, processes, shielding gases, test piece composition and test piece surface condition on fume

emission rate. Following analysis of the fume collected, the effects of test parameters on fume composition

can also be determined.
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
© ISO 2009 – All rights reserved 1
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SIST EN ISO 15011-1:2010
ISO 15011-1:2009(E)
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”.
4 Principle

Arc welding is performed manually or automatically for manual metal arc (MMA) welding or automatically for

continuous wire processes, on a test piece inside a semi-enclosed, continuously extracted test chamber. The

fume is collected on a pre-weighed filter and the arcing time (in seconds) is recorded. After welding, the filter

is re-weighed and the mass of fume collected (in milligrams) is calculated by difference. The fume emission

rate (in milligrams per second) is calculated by dividing the mass of fume collected (in milligrams) by the

arcing time (in seconds).
The fume generated is removed and retained for subsequent analysis.
5 Equipment and materials

5.1 Test chamber, having a top section in which a filter (5.2) is positioned to capture all fume produced

when an emission rate test is carried out, of a construction that minimizes the deposition of fume on the

internal surfaces (see B.1), and attached to a suitable extraction unit (5.3). Examples of possible designs are

described in Annex A.

5.2 Filters, manufactured from glass or quartz fibre, for emission rate testing. The filters shall be sufficiently

robust that they do not tear or perforate during testing (see B.2) and shall not be so friable that fibres can be

lost from the filters during handling.

Paper (cellulose) filters, for collection of fume for analysis. Glass and quartz fibre filters are not suitable

because the fume cannot be removed from the filter without contaminating it with fibres.

The surface area of the filters shall be large enough to avoid excessive pressure drop during emission rate

testing and collection (see B.2).

5.3 Extraction unit, capable of maintaining an adequate air flow rate through the filter (5.2), such that all

fume generated is contained within the test chamber (5.1) throughout the arcing period and the test chamber

is cleared of fume within 30 s of arc extinction, but not so high as to compromise weld metal integrity (see

B.3). The precise characteristics of the extraction unit are not critical.

5.4 Equipment for measuring welding current, arc voltage, wire feed speed and arcing time, capable

of measuring the arithmetic mean of the current, voltage and wire feed speed to within ± 5 % or better and the

arcing time to 0,1 s or better.

Electronic integrating equipment with frequent sampling intervals and a logging capability is recommended. In

the absence of such equipment, current may be measured using a shunt or a Hall effect probe connected to a

moving coil meter. Voltage may be measured using a moving coil meter. Wire feed speed may be measured

by measuring the length of wire exiting the welding torch in a measured time. Arcing time may be measured

using a stopwatch with a reading accuracy of 0,1 s or better.
The calibration of the equipment shall be traceable to national standards.

5.5 Equipment for measuring the mass of fume collected, consisting of a balance capable of measuring

the mass of filters and filters plus fume with an accuracy of ± 1 mg or better.
The balance calibration shall be traceable to national standards.
2 © ISO 2009 – All rights reserved
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SIST EN ISO 15011-1:2010
ISO 15011-1:2009(E)

5.6 Equipment for measuring shielding gas flow rate, calibrated for the shielding gas in use, capable of

measuring the flow rate to within ± 5 % or better (see B.4).
The calibration of the equipment shall be traceable to national standards.

5.7 Device for setting contact tip to workpiece distance (CTWD), consisting of a gauge made by

machining a metal block to a thickness equivalent to the required CTWD to within ± 5 % or better, or a metal

wedge with distance markings at appropriate points.

5.8 Device for automatic welding, permitting the emission rate test to be performed under automated

conditions, capable of advancing the test piece under a stationary welding torch at an appropriate rate

(welding speed), whilst positioned over a plane surface (e.g. a table), which extends at least to the extremities

of the hood. It shall be possible to secure the test piece to the device, such that it cannot bow or flex during

welding.

5.9 Test pieces, of a material and of dimensions suitable for the process and consumable examined, and

which allow a weld of sufficient length to be continuously deposited for an arcing time of at least 60 s

(see B.5).
6 Test procedures
6.1 Welding procedure selection
Perform MMA welding tests manually or using automatic welding.

Perform tests with continuous wire processes, e.g. metal inert gas or metal active gas (MIG/MAG) welding

with solid wires, metal-cored arc welding (MCAW), gas-shielded flux-cored arc welding (FCAW) and self-

shielded flux-cored arc welding (SSFCAW), using automatic welding.

NOTE Automatic welding is specified for use with those processes which can be easily performed automatically

because it is expected to provide greater reproducibility of fume emission rates than manual welding. However, for MMA

welding, this is difficult or impossible to carry out.

Perform manual welding tests and automatic welding set-up using a skilled welder.

6.2 Manual metal arc welding
6.2.1 Setting up the test chamber
Set up the test chamber (5.1) in an interference-free environment (see B.6).
6.2.2 Trial tests
6.2.2.1 Trial test to set the test current

Set the desired test conditions (see Annex C), performing a trial test to set the test current, as follows, using

the same monitoring equipment and materials to be used subsequently to perform the emission rate test

proper.

Connect the equipment for measuring current, voltage and time. See D.1 for further guidance.

Secure a test piece (5.9), centrally within the test chamber, so that it cannot move, bow or flex during welding.

Commence welding (see C.2 for information on the welding position) and adjust the power source to provide

the desired test current.
© ISO 2009 – All rights reserved 3
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SIST EN ISO 15011-1:2010
ISO 15011-1:2009(E)

Stop welding and renew or reposition the test piece so that the next weld is deposited on a cool, unwelded

metal surface, securing it so that it cannot move, bow or flex during welding.

Recommence welding, continue to weld for a suitable time period, e.g. 60 s, or until the electrode is consumed

and record the average current over the test period.

Verify that the desired test current has been attained and, if not, renew or reposition the test piece, re-adjust

the power source and repeat the test.

When the required test conditions have been achieved, proceed to the trial test to establish the test time for

emission rate tests (see 6.2.2.2).
6.2.2.2 Trial test to establish the test time for emission rate tests

Renew or reposition the test piece so that the next weld is deposited on a cool, unwelded metal surface,

securing it so that it cannot move, bow or flex during welding. Put a pre-weighed filter (5.2) for measuring

fume emission rate in place, start the extraction unit (5.3) and recommence welding.

Weld for 60 s or less if the electrode is completely deposited within this time, e.g. for electrodes less than

4 mm in diameter. Then switch off the extraction unit.

If, visually, fume escapes from the test chamber before the arcing period is complete, note the time at which

this first occurs and repeat the trial test using a shorter arcing time than that noted. If fume no longer escapes

from the test chamber when using the reduced arcing time, use this arcing time in the emission rate tests. If

fume does escape from the test chamber using the reduced arcing time, repeat the process until a suitable

arcing time is obtained.

If fume does not escape from the test chamber before the 60 s arcing period is complete, or before the

electrode is completely deposited, stop welding and re-weigh the filter. If the mass of fume collected exceeds

100 mg, use the 60 s arcing time in the emission rate tests or deposit a complete electrode. If the mass of

fume collected is less than 100 mg, calculate the number of electrodes that need to be deposited to generate

at least 100 mg of fume and deposit this number of electrodes in the emission rate tests.

6.2.3 Emission rate tests
Place a pre-weighed filter (5.2) in position in the test chamber.

Renew or reposition the test piece so that the next weld is deposited on a cool, unwelded metal surface, if

necessary securing it so that it cannot move, bow or flex during welding. Switch on the extraction unit (5.3).

Commence welding and, if manual timing is to be performed, start the stopwatch at the same time (5.4). Stop

welding after the required arcing time or when the electrode has been completely deposited, as determined in

the trial tests (see 6.2.2.2) and, at the same time, stop the stopwatch, if used. Leave the extraction unit on

until the fume generated has been cleared from the test chamber (at least 30 s) and then switch off the

extraction unit.

If the trial tests indicated the necessity to deposit several electrodes in order to collect sufficient fume, repeat

the procedure above, depositing the number of electrodes indicated in the trial tests, whilst collecting the fume

on the same filter, and calculate the total arcing time.
Remove the filter and re-weigh.

Perform three replicate tests and calculate the mean fume emission rate (see Clause 7). If any individual

result differs from the mean by more than ± 10 %, carry out two more tests and calculate the mean of all five

results. If any individual result then differs from the new mean by more than ± 10 %, carry out checks to

ensure that all equipment is functioning correctly and repeat the entire procedure.

4 © ISO 2009 – All rights reserved
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SIST EN ISO 15011-1:2010
ISO 15011-1:2009(E)
6.2.4 Fume collection for analysis

Secure a test piece (5.9) inside the test chamber so that it cannot move, bow or flex during welding.

Place a filter (5.2) in position in the test chamber.

Start the extraction unit and weld until, based upon the result of an emission rate test, sufficient fume for

analysis has collected on the filter.

NOTE 1 If an emission rate test is not carried out, estimation of the required arcing time is a matter of trial and error.

NOTE 2 It might be necessary to deposit several electrodes on multiple test pieces to collect sufficient fume for

analysis.

Stop welding, turn off the extraction unit and remove the filter from the test chamber.

Immediately brush the fume from the filter with a clean brush and place in a container with an airtight seal for

storage to prevent absorption of water.

If it is not possible to remove sufficient fume for analysis from the filter, repeat the process for a longer arcing

time, preferably using the same filter.
6.3 Continuous wire processes
6.3.1 Setting up of the test equipment
Set up the test chamber in an interference-free environment (see B.6).
6.3.2 Trial tests
6.3.2.1 Trial test to set the test conditions

Set the desired test conditions (see Annex C), performing a trial test to set the test current and voltage, as

follows, using the same monitoring equipment and materials to be used subsequently to perform the emission

rate test proper.

Connect the equipment for measuring current, arc voltage, wire feed speed and time (5.4). See D.1 for further

guidance on attaching the leads for measuring voltage and current.

Adjust the shielding gas flow rate to the desired value, if applicable (see C.7).

Secure a test piece (5.9) to the device for automatic welding (5.8) so that it cannot move, bow or flex during

welding and such that a constant CTWD is maintained throughout the test.
Position the welding torch at the desired angle (see C.3)
...

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