oSIST prEN 17242:2018
(Main)Recirculatory Filtration Fume Cupboards
Recirculatory Filtration Fume Cupboards
This document applies to Recirculatory Filtration Fume Cupboards (RFFC).
Recirculation Filtration Fume Cupboards are devices intended to protect their users by means of:
- the ability to contain potentially hazardous materials;
- the ability to remove potentially hazardous materials from air exhausted from within the fume cupboard by means of filtration before the air is recirculated (to the room in which the fume cupboard is located).
This document includes design and manufacturing requirements together with type testing procedures.
Umluft-Filter-Einhausung
Dieses Dokument gilt für Umluft-Filter-Einhausungen (en: Recirculatory Filtration Fume Cupboards, RFFC).
Umluft-Filter-Einhausungen sind Vorrichtungen, die dazu gedacht sind, ihre Anwender zu schützen durch:
- die Fähigkeit, potentiell gefährliche Materialien zurückzuhalten;
- die Fähigkeit, potentiell gefährliche Materialien aus der aus dem Abzugsinneren abgegebenen Luft durch Filtration zu entfernen, bevor die Luft umgewälzt wird (in den Raum, in welchem der Abzug steht).
Dieses Dokument beinhaltet Anforderungen an die Konstruktion und die Herstellung mitsamt Typprüfverfahren.
Sorbonnes à recirculation
Le présent document s'applique aux sorbonnes à recirculation (RFFC).
Les sorbonnes à recirculation sont des dispositifs destinés à protéger les utilisateurs grâce à :
- leur capacité à confiner des substances potentiellement dangereuses ;
- leur capacité à éliminer les matières potentiellement dangereuses de l'air extrait de l'intérieur de la sorbonne par filtration, avant qu'il ne recircule (dans la pièce où se trouve la sorbonne).
Le présent document contient des exigences de conception et de fabrication, en association avec des procédures d’essais de type.
Omare za recirkulacijsko filtriranje dima
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 17242:2018
01-junij-2018
Omare za recirkulacijsko filtriranje dima
Recirculatory Filtration Fume Cupboards
Umluft-Filter-Einhausung
Sorbonnes à recirculation
Ta slovenski standard je istoveten z: prEN 17242
ICS:
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
oSIST prEN 17242:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 17242:2018
DRAFT
EUROPEAN STANDARD
prEN 17242
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 71.040.10
English Version
Recirculatory Filtration Fume Cupboards
Sorbonnes à recirculation Umluft-Filter-Einhausung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 332.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17242:2018 E
worldwide for CEN national Members.
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Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Classification of Recirculatory Filtration Fume Cupboards . 5
5 Requirements of Recirculation Filtration Fume Cupboards . 6
5.1 General requirements . 6
5.2 Gas and vapour filtration . 6
5.3 Particulate filtration . 7
5.4 Filter monitoring arrangements . 7
6 Performance tests for Recirculation Filtration Fume Cupboards . 8
6.1 Test rooms and test conditions for filtration and containment test . 8
6.2 Filtration of gases and vapours . 8
6.3 Test of gas and vapour sensors . 14
6.4 Filtration for particulates . 15
7 Containment . 15
7.1 Test equipment . 15
7.2 Data recording . 16
7.3 Test condition . 16
7.4 Sampling probe grid . 16
7.5 Test procedure . 17
7.6 Data analysis and results . 18
8 Commissioning and routine testing of Recirculatory Filtration Fume Cupboards . 19
9 Marking . 19
10 Product manual . 19
Bibliography . 21
2
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European foreword
This document (prEN 17242:2018) has been prepared by Technical Committee CEN/TC 332
“Laboratory equipment”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
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1 Scope
This document applies to Recirculatory Filtration Fume Cupboards (RFFC).
Recirculation Filtration Fume Cupboards are devices intended to protect their users by means of:
— the ability to contain potentially hazardous materials;
— the ability to remove potentially hazardous materials from air exhausted from within the fume
cupboard by means of filtration before the air is recirculated (to the room in which the fume
cupboard is located).
This document includes design and manufacturing requirements together with type testing procedures.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN 14175-1, Fume cupboards — Part 1: Vocabulary
EN 14175-2, Fume cupboards — Part 2: Safety and performance requirements
EN 14175-3, Fume cupboards — Part 3: Type test methods
EN 14175-4, Fume cupboards — Part 4: On-site test methods
EN 14175-6, Fume cupboards — Part 6: Variable air volume fume cupboards
EN 1822-1, High efficiency air filters (EPA, HEPA and ULPA) — Part 1: Classification, performance testing,
marking
EN ISO 14644-3:2005, Cleanrooms and associated controlled environments — Part 3: Test methods (ISO
14644-3:2005)
EN ISO 14644-1, Cleanrooms and associated controlled environments — Part 1: Classification of air
cleanliness by particle concentration (ISO 14644-1)
3 Terms and definitions
For the purpose of this document, the terms and definitions given in EN 14175-1 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
filtration system
assembly of components that are used to remove/trap airborne contaminants
Note 1 to entry: It can be arranged to remove/trap particulates and/or gases/vapours by means of a single
filter or a combination of two or more filters.
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3.2
filtration fume cupboard
FFC
fume cupboard equipped to remove materials from the exhaust air stream
3.3
recirculation filtration fume cupboard
RFFC
fume cupboard equipped to remove materials from the exhaust air stream before recirculation to the
room in which it is located
3.4
gas and vapours filter
filter used to remove vapours or gases from an air stream
Note 1 to entry: It could for example, be an activated carbon filter.
3.5
particulate filter
filter used to remove particulates from an air stream
Note 1 to entry: It could for example, be HEPA filter.
3.6
pre-filter
intial stage of filtration used to remove particulates and/or gases/vapours prior to other components
(of a filtration system) having higher removal efficiencies
3.7
limit value
exposure limit of the challenge chemicals
3
−6
Note 1 to entry: Expressed in 10 (ppm V) or in mg/m .
Note 2 to entry: In this standard the value is the lowest published limit in GESTIS databases.
4 Classification of Recirculatory Filtration Fume Cupboards
The filtration fume cupboard of the present standard has the following 3-part classification:
X (general type of application) / Y (filters class) / Z (monitoring arrangements)
The details are set out below.
General type of application:
— Class A: RFFCs with integral filters;
— Class B: RFFCs with associated filters.
Filters:
— 1: particulate filter;
— 2: gas and vapour filter;
— 3: particulate and gas and vapour filters;
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— 4: other filtration devices or arrangements including those for FFCs having internal, filtered
recirculation.
Filter monitoring arrangements:
— 0: no filter condition monitoring arrangements;
— 1: in-built continuous filter condition monitoring arrangements.
EXAMPLE
Examples for the designation of a RFFC with integral particulate and chemical filters and continuous filter
conditioning monitoring would be:
Class A / 3 / 1 .
5 Requirements of Recirculation Filtration Fume Cupboards
5.1 General requirements
Filtration fume cupboards shall fulfil the requirements as given in EN 14175-2 with addition of the
following chapters.
NOTE In many cases the life and efficiency of filters can be extended by pre-treatment of the extracted air.
5.2 Gas and vapour filtration
The chemicals that can be removed by the filtration system shall be identified by a label carrying the
same information as that given to the operator in Clause9 Marking.
For filtration evaluation reference should be made to the GESTIS International Limit Values from which
the lowest limit values should be used. When a particular chemical under consideration is not in this
list, an individual risk assessment shall be carried out to establish the suitability of filtration fume
cupboard.
The filtration system of filtration fume cupboards shall be resistant to chemical agents allowed of being
used in the filtration fume cupboards.
The design of the filtration system shall be such that filters can be changed by someone suitably trained
without them requiring physical contact with the filter itself. Safe methods of changing filters shall be
fully described in the product manual.
The filter installation date and its latest projected replacement date shall be indicated on the front of the
FFC or in the fume cupboard log book attached to the fume cupboard manual.
NOTE Back-up gas and vapour filters, located after the primary gas and vapour filter can be requested by
regulations, guidelines or recommendation in some countries.
RFFCs of classes A or B shall be submitted to the following tests:
— in the case of filters designed to be used with volatile organic chemicals: two successive types tests
shall be made, one with cyclohexane (C H ; CAS n°110-82-7) and the other with isopropanol
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(C H O; CAS n° 67-63-0). Each test shall be performed with a new filter following the procedure
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described in 6.2;
— in the case of filters designed to be used with acid vapours: a type test will be carried out with
hydrochloric acid (HCl; CAS n° 7647-01-0) following the procedure described in 6.2;
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— in the case of filters designed to be used with amines: a type test will be carried out with ammonia
(NH ; CAS n° 7664-41-7) following the procedure described in 6.2;
3
— in the case of filters designed to be used with formaldehyde: a type test will be carried out with
formaldehyde (CH O; CAS n° 50-00-0) following the procedure described in 6.2.
2
The filtration system of RFFCs of classes A and B shall not have a release at the filter or filters exhaust of
more than 1 % of the exposure limit value within the adsorption or chemisorption of the minimum
quantities (LOW) of chemicals listed in 6.2.
5.3 Particulate filtration
RFFCs of classes A or B equipped with filter systems of type 1 or 3 shall have a particulates filter.
NOTE For example HEPA filters with efficiency H14 at least, as defined in EN 1822-1.
During the life of the filter its pressure drop will increase as it loads. This should be monitored to
ensure that manufacture's recommendations are not exceeded.
5.4 Filter monitoring arrangements
5.4.1 Fume cupboards without continuous filter monitoring
Fume cupboards without continuous filter monitoring shall have a procedure for checking the condition
of the filter. A sampling port shall be equipped on the fume cupboard in order to allow this routine
testing.
NOTE This can include an audible and visual alarm triggered by an adjustable hours run counter that informs
the user of the need to perform a routine test of the filters efficiency. The filter replacement interval time will
typically be set following a risk assessment.
Particulate filter saturation can be checked with, for example, a manometer or a flow sensor.
Gas and vapour filters can be checked measuring the air quality at the filter exhaust using portable
detection equipment such as PID, FID, GC, Colorimetric tubes or similar devises.
5.4.2 Fume cupboards with continuous filter monitoring
Fume cupboards with continuous filter monitoring shall automatically and continuously measure the
efficiency of the filtering system.
In case of gas and vapour filters an audible and visual alarm shall inform the user when the
concentration at the filter exhaust reaches a level of 1 % of the exposure limit used in the RFFC. When
detectors are not able to achieve detection of 1 % of the exposure limit, manufacturer shall clearly
inform users about detection limits of embedded sensors in its documentation.
All sensors shall be calibrated to the manufacturer's requirements and recommendations.
EXAMPLE Saturation sensors are: Photoionization sensors; electrochemical sensors; metal oxide array
sensor.
In the case of particulates filters a continuous filter monitoring system that detects the degree of
loading of the filter shall be installed. The RFFC shall be capable of maintaining the specified design air
flow rate as filter element(s) load.
The particulate filter saturation level can be checked by measuring the face velocity at the working
opening. If it is lower than any critical value declared in the product manual the filter(s) should be
replaced.
NOTE Examples of sensors can include hot wire anemometers and differential manometers.
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6 Performance tests for Recirculation Filtration Fume Cupboards
6.1 Test rooms and test conditions for filtration and containment test
The room air temperature shall be (20 ± 2) °C.
The test zone boundary shall extend approx. 1,5 m in front of the fume cupboard and approx. 1,0 m
from the outer sidewalls of the cupboard over the full room height.
The air renewal in the test room shall be lower than 0,1 air change per hour during the test.
6.2 Filtration of gases and vapours
6.2.1 Filtration tests for gas and vapour
The RFFC to be tested shall be equipped with a new set of filters and placed into a test room of the
dimensions, layout, and, arrangements according to EN 14175-3 with the exception that the ventilation
system shall be turned off. Arrangements shall be put in place in order to avoid exposure of the
occupants to chemicals used during testing.
The challenge chemicals to be used for the test shall be evaporated within the RFFCs so as to obtain a
constant concentration during all operating phases of:
— 200 ppm for the isopropanol test;
— 200 ppm for the cyclohexane test;
— 100 ppm for the hydrochloric acid test;
— 100 ppm for the formaldehyde;
— 100 ppm for ammonia.
For the certified fume cupboard:
— when equipped with specific filter(s) characterised to trap organic solvents, it shall be tested with
isopropanol and cyclohexane;
— when equipped with specific filter(s) characterised to trap inorganic acids, it shall be tested with
hydrochloric acid;
— when equipped with specific filter(s) characterised to trap ammonia and/or amines, it shall be
tested with ammonia;
— when equipped with specific filter(s) characterised to trap formaldehyde and/or other aldehydes, it
shall be tested with formaldehyde.
When the tests are carried out they are not necessarily continuous. The test shall be of the minimum of
8 h and if stopped and subsequently restarted they shall be an interval of at least 12 h. This cycle shall
be repeated until a chemical breakthrough occurs.
NOTE The total duration of the test will vary, being dependent on the performance characteristics of
particular filters.
The chemical agent concentration at the filtration system exhaust shall be measured at least every
twenty minutes during the testing period of the RFFC and shall be expressed as ppm.
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6.2.2 Analysers and detectors
For gases and vapours the selected analyser shall be capable of resolving less than 1 % of the exposure
limit value of the challenge chemical.
NOTE The sampling procedure and analysing methods could be, for example, one of those or other essentially
equivalent methods:
— Hydrochloric Acid fume sampling is performed by gas bubbling a known volume of air to be taken
(flow rate known, sampling time known) in a buffered Na CO /NaHCO solution. The sample so prepared is then
2 3 3
analyzed by ionic chromatography (IC);
— Organic fume sampling (cyclohexane or isopropanol) is performed by trapping a known volume (flow
rate known, sampling time known) of air to be taken from an adsorbing cartridge (Tenax or activated carbon). The
prepared sample is then desorbed by a disulfide carbon solution (CS ) before it is analysed by a gas phase
2
chromatograph equipped with an appropriate detector;
— Ammonia: Air contaminated with ammonia can be sampled through solid sorbent tubes pre-treated by
sulfuric acid. The sample is desorbed by ammonia free deionized water, and then can be analysed by ionic
chromatography;
— Formaldehyde: The detection and analysis of very low concentrations of formaldehyde can present
difficulties. 2,4-dinitrophenyldydrazine (DNPH) is, however, known to react with aldehyde. It is therefore possible
to sample air contaminated by formaldehyde by passing it through a column of silica gel impregnated with DNPH.
After sampling, formaldehyde is desorbed by an acetonitrile/dichloromethane mixture. The final analysis is
performed by HPLC. It is highly important to maximize sampling time and flow rate of sampling in order to
achieve the requested sensitivity.
6.2.3 Test procedure
Tests shall be performed at a temperature of (20 ± 2) °C and at a relative humidity level between 40 %
and 70 %. The temperature and relative humidity of the test room shall be measured and recorded at
least ever
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