prEN 15051-1

SLOVENSKI STANDARD
01-julij-2024
Izpostavljenost na delovnem mestu - Meritve prašnosti razsutih materialov - 1. del:
Zahteve in izbira preskusnih metod
Workplace exposure - Measurement of the dustiness of bulk materials - Part 1:
Requirements and choice of test methods
Exposition am Arbeitsplatz Messung des Staubungsverhaltens von Schüttgütern - Teil 1:
Anforderungen und Auswahl der Prüfverfahren
Exposition sur les lieux de travail - Mesurage du pouvoir de resuspension des matériaux
pulvérulents en vrac - Partie 2 : Méthode du tambour rotatif
Ta slovenski standard je istoveten z: prEN 15051-1
ICS:
13.040.30 Kakovost zraka na delovnem Workplace atmospheres
mestu
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2024
ICS 13.040.30 Will supersede EN 15051-1:2013
English Version
Workplace exposure - Measurement of the dustiness of
bulk materials - Part 1: Requirements and choice of test
methods
Exposition sur les lieux de travail - Mesurage du Exposition am Arbeitsplatz Messung des
pouvoir de resuspension des matériaux pulvérulents Staubungsverhaltens von Schüttgütern - Teil 1:
en vrac - Partie 2 : Méthode du tambour rotatif Anforderungen und Auswahl der Prüfverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 137.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15051-1:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principles . 7
5 General Procedures . 7
5.1 Schematic overview of the procedure . 7
5.2 Conditioning of the bulk material . 9
5.2.1 As-received condition. 9
5.2.2 Conditioning specifications . 9
5.3 Sample and environmental control . 9
5.4 Taking samples from the bulk material . 9
5.5 Moisture content . 10
5.6 Bulk density . 10
5.7 Test procedure . 10
5.8 Replicate tests . 10
5.9 In-house / test powder . 10
5.10 Reporting . 10
6 Choice of test methods . 10
6.1 General. 10
6.2 Selection of the most appropriate test method. 11
7 Evaluation of dustiness . 11
8 Test report . 12
Annex A (normative) Determination of moisture content . 13
Annex B (normative) Determination of bulk density of the test material . 15
Annex C (informative) Spheriglass 5000 CP00 – An example of a suitable powder for quality
purposes . 16
Bibliography . 17

European foreword
This document (prEN 15051-1:2024) has been prepared by Technical Committee CEN/TC 137
“Assessment of workplace exposure to chemical and biological agents”, the secretariat of which is held
by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15051-1:2013.
EN 15051-1:2013:
— The introduction was revised to better explain the purpose of dustiness testing;
— Clause 5.1: a schematic overview of the test procedure has been added;
— Clause 5.8: information about an in-house / test powder has been added;
— Annex C: an example of a suitable powder for quality purposes (Spheriglass 5000 CP00) has been
added.
EN 15051 Workplace exposure – Measurement of the dustiness of bulk materials consists of the following
parts:
— Part 1: Requirements and choice of test methods;
— Part 2: Rotating drum method;
— Part 3: Continuous drop method.
EN 15051-2 and EN 15051-3 give details of two test apparatus and test methods for the reproducible
production of dust from a bulk material under standard conditions, and the measurement of the
inhalable, thoracic and respirable fractions of this dust, with reference to the existing European
Standards, where relevant (see Clause 6).
Introduction
The control of dust emissions during the handling and transportation of bulk materials is an important
consideration in the design and operation of many industrial processes. Excessive airborne dust levels in
workplaces are undesirable for several reasons:
— they can cause adverse health effects to the workers;
— their control can involve the use of costly ventilation and filtration systems;
— they can contaminate machinery and products;
— they can be costly in terms of product losses.
It is therefore advantageous for occupational hygienists and process engineers to have relevant
information about the propensity of bulk materials to release airborne particles (i.e. dust) (the
“dustiness” of the bulk material) so that risks can be evaluated, controlled and minimized.
Dustiness testing measures the propensity of a bulk materials e.g. powder to become airborne in response
to a mechanical stimulus. Dustiness is a relative term and the measurement obtained will depend on
defined method parameters including: the test apparatus used (design and volume), the mechanical
stimulus and energy level applied, the condition and properties of the tested bulk material, the amount
of bulk material tested (volume or mass), the sampling duration or volume of air sampled and various
environmental variables (e.g. relative humidity, temperature and electrostatic effects). If one changes the
extent of one or more method parameters then the outcome (e.g. dustiness values) can change
significantly. The test and the variables therefore need to be closely specified to ensure reproducibility.
A single method of dustiness testing is unlikely to represent and reproduce the many types of processing
and handling used in industry. This has meant that a number of bespoke methods have been developed
and used in some industry sectors but are limited in their scope and application and were not designed
to measure and express results in terms of the health-related fractions: i.e. inhalable, thoracic and
respirable, as defined in EN 481. Therefore, a clear need for a standard was presented and EN 15051-1
was published in 2013. The standard series included two test methods; EN 15051-2 (rotating drum test)
and EN 15051-3 (continuous drop test), to simulate two of the main handling methods: small-scale
repeated discreet handling (e.g. shovelling, dispensing, batch preparation and weighing etc.) and larger
scale conveyancing of bulk dust into silos and hoppers. EN 15051-2 separates the airborne dust into the
three health related fractions using porous foams and EN 15051-3 measures the respirable fraction using
a well-characterized cyclone sampler.
This document was originally developed based on the results of the European project SMT4-CT96-
2074 Development of a Method for Dustiness Testing (see [1]). This project investigated the dustiness of
12 bulk materials, with the intention to test as wide a range of bulk materials as possible, i.e. magnitude
of dustiness, industrial sectors, chemical composition and particle size distribution. The first revision
considered important comments from industrial users of the standard (e.g. Industrial Minerals
Association), a number of research papers (for example, [2] and [3]) and the potential influence of the
expanding database of dustiness results. In this revised version, the performance and characteristics of
the metal foams for the sampling of the respirable fraction and important comments from industrial users
of the standard have been taken into account.
The level of the dustiness generally depends on material-specific and process-specific parameters. The
most important material-specific parameters are:
— the particle size distribution of the bulk material;
— its bulk density;
— its moisture content (“bulk material moisture content”);
— its chemical composition;
— physical characteristics like electrostatic charge distribution.
Process-specific parameters are mainly determined by the type of handling and are essentially
determined by:
— the type and level of energy that leads to dust release;
— the duration of the energy effect.
For a specific chemical substance in a powder form, it is important to understand that its particle size
distribution cannot predict its dustiness behaviour and respectively its dustiness values cannot predict
the size distribution of this substance.
The format and calculation of the dustiness test results are expressed in terms of the ratio of the mass of
dust released of specific health-related fractions (mg) / mass of material tested (kg) for defined method
parameters. They are relative values, so a specific scale for dustiness has been derived for each method,
which enables a categorization of the powder into: very low, low, medium and high dustiness categories,
for the applicable health-related fraction/s measured. The scale is specific to the dustiness method
selected and for the defined method parameters.
The dustiness values of a specific method can be used for comparing and ranking powders and assess
whether the current controls are adequate. The information also supports risk and safe by design
assessments. The results provide users (e.g. manufacturers, producers, occupational hygienists and
workers) with information on the potential for dust emissions, when the bulk material is handled or
processed in workplaces. It provides the manufacturers of bulk materials with information that can help
to improve their products. It allo
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