ISO 29042-1:2008

INTERNATIONAL ISO
STANDARD 29042-1
First edition
2008-09-15


Safety of machinery — Evaluation of the
emission of airborne hazardous
substances —
Part 1:
Selection of test methods
Sécurité des machines — Évaluation de l'émission de substances
dangereuses véhiculées par l'air —
Partie 1: Choix des méthodes d'essai




Reference number
ISO 29042-1:2008(E)
©
ISO 2008

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ISO 29042-1:2008(E)
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ii © ISO 2008 – All rights reserved

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ISO 29042-1:2008(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 29042-1 was prepared by Technical Committee ISO/TC 199, Safety of machinery.
ISO 29042 consists of the following parts, under the general title Safety of machinery — Evaluation of the
emission of airborne hazardous substances:
⎯ Part 1: Selection of test methods
⎯ Part 2: Tracer gas method for the measurement of the emission rate of a given pollutant
⎯ Part 3: Test bench method for the measurement of the emission rate of a given pollutant
⎯ Part 4: Tracer method for the measurement of the capture efficiency of an exhaust system
The following parts are under preparation:
⎯ Part 5: Test bench method for the measurement of the separation efficiency by mass of air cleaning
systems with unducted outlet
⎯ Part 6: Test bench method for the measurement of the separation efficiency by mass of air cleaning
systems with ducted outlet
⎯ Part 7: Test bench method for the measurement of the pollutant concentration parameter
Room method for the measurement of the pollutant concentration parameter and decontamination index are
to form the subjects of future parts 8 and 9.
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ISO 29042-1:2008(E)
Introduction
The structure of safety standards in the field of machinery is as follows:
a) Type-A standards (basic safety standards) giving basic concepts, principles for design, and general
aspects that can be applied to all machinery;
b) Type-B standards (generic safety standards) dealing with one safety aspect or one type of safeguard that
can be used across a wide range of machinery:
⎯ type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature, noise);
⎯ type-B2 standards on safeguards (e.g. two-hand control devices, interlocking devices, pressure-
sensitive devices, guards);
c) Type-C standards (machine safety standards) dealing with detailed safety requirements for a particular
machine or group of machines.
This document is a type-B standard as stated in ISO 12100.
The requirements of this document can be supplemented or modified by a type-C standard.
For machines which are covered by the scope of a type-C standard and which have been designed and built
according to the requirements of that standard, the requirements of that type-C standard take precedence.
ISO/TC 199 has a mandate in this area to produce type-A and type-B standards, which will allow verification
of conformity with the essential safety requirements.
ISO 29042-1 is based on EN 1093-1, published by the European Committee for Standardization (CEN) which
is at the same time subject to revision.
The concentration level of substances resulting from emission of airborne hazardous substances from
machines depends upon factors including:
⎯ the emission rate of airborne hazardous substances (“pollutants”) from the machine under examination,
depending of the type of process and the production rate of the machine;
⎯ the performance of the pollutant control system associated with the machine and, in the case of air
recirculation, the performance of the separation system;
⎯ the surrounding conditions, especially the air flow pattern, which can reduce the pollution (efficient
general ventilation) or increase it (disturbing air, crossdraughts);
⎯ the worker's location in relation to the machine and its pollutant control system, and taking into account
the workers movements;
⎯ the quality of maintenance; poor quality has generally an adverse effect on the performance of the
pollutant control and the separation systems.
This International Standard concerns the first two points in this list and forms only one part of a
comprehensive risk assessment. It is not for a risk assessment of the workplace. Evaluation of the parameters
defined in this International Standard leads to an evaluation of the performance of the machine and its
associated pollutant control system.
This International Standard can be used as a part of verification described in ISO 14123-2.
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INTERNATIONAL STANDARD ISO 29042-1:2008(E)

Safety of machinery — Evaluation of the emission of airborne
hazardous substances —
Part 1:
Selection of test methods
1 Scope
This part of ISO 29042 specifies parameters which can be used for the assessment of the emission of
pollutants from machines or the performance of the pollutant control systems integrated in machines. It gives
guidance on the selection of appropriate test methods according to their various fields of application and types
of machine including the effects of measures to reduce exposures to pollutants. The test methods are given in
other parts of this International Standard (see Table 1).
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 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100-1 and the following apply.
3.1
uncontrolled emission rate of a given pollutant
m&
u
mass of pollutant emitted from the machine into the space around the machine per unit of time
NOTE Any measures to reduce the air pollution around the machine (e.g. capture devices, containment equipment,
wetting process) should not be used or should be de-activated.
3.2
controlled emission rate of a given pollutant
&
m
k
mass of pollutant emitted from the machine into the space around the machine per unit of time, taking into
account the effects of measures to reduce the air pollution
NOTE Any measures to reduce the air pollution around the machine (e.g. capture devices, containment equipment,
wetting process) should be used or activated.
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ISO 29042-1:2008(E)
3.3
capture efficiency
η
c
〈pollutant control system〉 ratio of the mass flow rate of a given pollutant directly collected by the pollutant
control system to the uncontrolled mass flow rate of this pollutant emitted from the machine
NOTE 1 The capture efficiency, as a percentage, can be calculated by the following equation:
&&
mm−
uk
η=× 100 (1)
c
m&
u
&&
This equation is applicable only if mm− represents the pollutant mass flow rate directly captured. This parameter is not
uk
usable when the amount of emission is affected by the control system.
NOTE 2 Where the pollutant control system is an exhaust system and provided comparable discharge and flow
patterns of the real pollutant can be simulated by a tracer technique the equation becomes:
q
C
η=×100 (2)
c
q
E
where
q is the flow rate of tracer collected by the exhaust system during operation;
C
q is the flow rate of tracer emitted (measured by emitting the tracer directly into the exhaust system during the first
E
phase).
NOTE 3 For further details see ISO 29042-4:—, Clause 5.
3.4
separation efficiency by mass
η
s
〈air cleaning system〉 ratio of the mass of pollutant retained by the air cleaning system (m ) to the mass of
3
pollutant entering the air cleaning system (m ) during a given period
1
NOTE 1 For special applications the number of fibres or particles is measured instead of the mass.
NOTE 2 The separation efficiency of an air cleaning system, as a percent mass fraction, can be calculated by the
following equation:
m
3
η=×100 (3)
s
m
1
NOTE 3 In certain cases it can be necessary to consider only that part of pollutants (e.g. size of particles) which is
actually hazardous for exposed persons; e.g. separation efficiency of a separation system against hazardous dust is
measured as a function of particle size — otherwise the results will possibly not be reliable for health and safety purposes.
3.5
pollutant concentration parameter
P
c
the measured concentration of a given pollutant in defined position(s) near the machine
3.6
decontamination index
I
A
the average of the ratio, obtained at a number of specified locations in the surroundings, of the ambient air
quality improv
...