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STANDARD
SIST EN 1827:1999+A1:2009
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1827:1999+A1
June 2009 ICS 13.340.30 Supersedes EN 1827:1999English Version
Respiratory protective devices - Half masks without inhalation valves and with separable filters to protect against gases or gases and particles or particles only - Requirements, testing, marking
Appareils de protection respiratoire - Demi-masques sans soupape inspiratoire et avec filtres démontables, contre les gaz, contre les gaz et les particules, ou contre les particules uniquement - Exigences, essais, marquage
Atemschutzgeräte - Halbmasken ohne Einatemventile und mit trennbaren Filtern zum Schutz gegen Gase, Gase und Partikeln oder nur Partikeln - Anforderungen, Prüfung, Kennzeichnung This European Standard was approved by CEN on 26 December 1998 and includes Amendment 1 approved by CEN on 1st May 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 worldwide for CEN national Members. Ref. No. EN 1827:1999+A1:2009: ESIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
2 Contents
Foreword 3Introduction 41
Scope 42
Normative references 43
Terms and definitions 54
Description 55
Classification 56
Designation 67
Requirements 67.1
General 67.2
Nominal values and tolerances 77.3
Visual inspection 77.4
Materials 77.5
Flammability 77.6
Cleaning and disinfecting 77.7
Filter material 77.8
Finish of parts 77.9
Demountable parts 77.10
Head harness 87.11
Connections 87.12
Exhalation valves 87.13
Packaging 87.14
Mass 97.15
Gas filter capacity 97.16
Particle filter penetration 117.17
Clogging (Optional) 117.18
Compatibility with skin 127.19
Carbon dioxide content of inhalation air 127.20
Breathing resistance without clogging 137.21
Inward leakage 157.22
Field of vision 157.23
Practical performance 158
Testing 158.1
General 158.2
Conditioning 158.3
Visual inspection 188.4
Flammability 188.5
Cleaning and disinfecting 198.6
Exhalation valves (if fitted) 198.7
Gas filter capacity 218.8
Particle filter penetration 218.9
Clogging 218.10
Carbon dioxide content of inhalation air 218.11
Breathing resistance 258.12
Inward leakage 268.13
Practical performance 369
Marking 389.1
Packaging 389.2
Half mask 399.3
Filters 3910
Information supplied by the manufacturer 40Table 8 -
Summary of requirements and tests 41Annex A (informative)
Marking 43Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or other provisions of EU Directives 44
SIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
3
Foreword
This document (EN 1827:1999+A1:2009) has been prepared by Technical Committee CEN/TC 79 "Respiratory protective devices", 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 December 2009, and conflicting national standards shall be withdrawn at the latest by December 2009.
This European Standard supersedes EN 1827:1999.
This document includes Amendment 1, approved by CEN on 2009-05-01.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard.
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.
SIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
4
Introduction
A given respiratory protective device can only be approved when the individual components satisfy the requirements of the test specification which may be a complete standard or part of a standard, and practical performance tests have been carried out successfully on complete apparatus where specified in the appropriate standard. If for any reason a complete apparatus is not tested then simulation of the apparatus is permitted provided the respiratory characteristics and weight distribution are similar to those of the complete apparatus.
1
Scope
This European Standard specifies performance requirements, test methods and marking requirements for half masks (re-usable) without inhalation valves and with separable filters (designed for a maximum of single shift use) to protect against gases or gases and particles or particles only. It does not cover devices designed for use in circumstances where there is or might be an oxygen deficiency (oxygen less than 17 % by volume) or for escape purposes. Laboratory and practical performance tests are included for the assessment of compliance with the requirements.
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." EN 132 Respiratory protective devices – Definitions of terms and pictograms
EN 134 Respiratory protective devices – Nomenclature of components
!deleted text"
!EN 143" Respiratory protective devices – Particle filters – Requirements, testing, marking
EN 148-1 Respiratory protective devices – Threads for facepieces – Part 1: Standard thread connection
EN 148-2 Respiratory protective devices – Threads for facepieces – Part 2: Centre thread connection
EN 148-3 Respiratory protective devices – Threads for facepieces – Part 3: Thread connection M 45 x 3
!EN 149" Respiratory protective devices – Filtering half masks to protect against particles – Requirements, testing, marking
!deleted text"
!EN 13274-7:2008,
Respiratory protective devices – Methods of test – Part 7: Determination of particle filter penetration"
!EN 14387:2004,
Respiratory protective devices – Gas filter(s) and combined filter(s) - Requirements, testing, marking"
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EN 1827:1999+A1:2009 (E)
5
!ISO 6941" Textile fabrics – Burning behaviour – Measurement of flame spread properties of vertically oriented specimens
3
Terms and definitions
For the purposes of this European Standard the definitions in EN 132 and the nomenclature from EN 134 apply.
Gas filters remove specified gases. Combined filters remove dispersed solid and/or liquid particles and specified gases. The term "gases" is taken to include vapours.
Particle filters remove solid and/or liquid particles.
A solid aerosol is defined as a dispersion of solid particles in air. A liquid aerosol is defined as a dispersion of liquid particles in air.
4
Description
A half mask without inhalation valves covers the nose and mouth and the chin, has no inhalation valves and may or may not have exhalation valves. It comprises a facepiece and separable and replaceable filters. It provides adequate sealing for the intended use on the face of the wearer against the ambient atmosphere, when the skin is dry or moist and when the head is moved.
Inhalation air enters through the filter and passes directly to the nose and mouth area of the device. Exhaled air passes through the filter and an exhalation valve (if fitted) to the ambient atmosphere.
In addition to providing protection against gases these devices can be designed to protect against both solid and liquid aerosols.
5
Classification
5.1
General
Half masks shall be classified according to the types and classes of filters used.
5.2
Filter types
Type FM A - for use against certain organic gases and vapours with a boiling point higher than 65 °C as specified by the manufacturer.
Type FM B - for use against certain inorganic gases and vapours as specified by the manufacturer (excluding carbon monoxide).
Type FM E - for use against sulfur dioxide and other acid gases and vapours as specified by the manufacturer.
Type FM K - for use against ammonia and organic ammonia derivatives as specified by the manufacturer.
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EN 1827:1999+A1:2009 (E)
6 Type FM AX - for use against certain low boiling organic compounds as specified by the manufacturer.
Type FM SX - for use against specific named gases and vapours.
!Type FM P NR - for single shift use against particles."
Any combination of these types is permitted.
5.3
Filter classes
5.3.1 Gas filter classes
Class 1 - low capacity (Gas 1).
Class 2 - medium capacity (Gas 2).
The protection provided by class 2 devices includes that provided by the corresponding class 1 device of the same type.
FM AX and FM SX filters are not classified.
5.3.2 Particle filter classes
!Class 1 low filtering efficiency (FM P1 NR).
Class 2 medium filtering efficiency (FM P2 NR).
Class 3 high filtering efficiency (FM P3 NR).
The protection provided by a FM P2 NR - or FM P3 NR - filter also includes that provided by the corresponding filter of lower class or classes."
6
Designation
Respiratory protective devices meeting the requirements of this European Standard shall be designated as follows:
!Half mask without inhalation valve EN 1827, year of publication, type, classification, option (where "D" is an option for a non re-useable half mask without inhalation valves and mandatory for a re-useable half mask without inhalation valves).
EXAMPLE Half mask without inhalation valve EN 1827:1999 FM E1 P2 NR D."
7
Requirements
7.1
General
In all tests, all test samples shall meet the requirements. SIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
7
7.2
Nominal values and tolerances
Unless otherwise specified, the values stated in this European Standard are expressed as nominal values. Except for temperature limits, values which are not stated as maxima or minima shall be subject to a tolerance of ± 5 %. Unless otherwise specified, the ambient temperature for testing shall be (24 ± 8) °C, and the temperature limits shall be subject to an accuracy of ± 1 °C.
7.3
Visual inspection
The visual inspection shall include the marking and the information supplied by the manufacturer.
Testing shall be done in accordance with 8.3.
7.4
Materials
Materials used shall be suitable to withstand handling and wear over the period for which the half mask is designed to be used. After testing in accordance with 8.2.4, 8.12 and 8.13 none of the devices shall have suffered mechanical failure of the facepiece body, straps or filter elements.
Testing shall be done in accordance with 8.3.
7.5
Flammability
Parts of a complete device that might be exposed to a flame during use shall not burn or continue to burn for more than 5 s after removal from the flame.
Testing shall be done in accordance with 8.3 and 8.4.
It is not required that the device still has to be useable after the test.
7.6
Cleaning and disinfecting
Any part of the device designed to be used for more than a single shift (single-use), shall withstand the cleaning and disinfecting agents and procedures recommended by the manufacturer.
Testing shall be done in accordance with 8.5.
7.7
Filter material
Any material of the filter media or any gaseous products that may be released by the air flow through the filter shall not constitute a hazard or nuisance for the wearer.
Testing shall be done in accordance with 8.3 and 8.13.
7.8
Finish of parts
Parts of the device likely to come into contact with the wearer shall have no sharp edges or burrs.
Testing shall be done in accordance with 8.3.
7.9
Demountable parts
All parts designed to be demountable shall be readily connected and secured, where possible by hand.
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EN 1827:1999+A1:2009 (E)
8 Testing shall be done in accordance with 8.3 and 8.13.
7.10
Head harness
7.10.1 The head harness shall be designed so that the device can be donned and removed easily.
Testing shall be done in accordance with 8.12 and 8.13.
7.10.2 The head harness shall be adjustable or self-adjusting and shall be sufficiently robust to hold the device firmly in position and be capable of maintaining inward leakage requirements for the device.
Testing shall be done in accordance with 8.12 and 8.13.
7.11
Connections
The connection between filter(s) and half mask shall be robust and reliable. The connection shall be achieved by use of a special connection. Threads specified in EN 148-1, EN 148-2 or EN 148-3 shall not be used. If a thread connection is used, it shall not be possible to connect this to the threads specified in EN 148-1, EN 148-2 or EN 148-3.
Testing shall be done in accordance with 8.3, 8.12 and 8.13.
7.12
Exhalation valves
7.12.1 Exhalation valve(s) (if fitted) shall function correctly in all orientations.
Testing shall be done in accordance with 8.12.
7.12.2 Exhalation valves (if fitted) shall be protected against or be resistant to dirt and mechanical damage. They may be shrouded or include any other device that may be necessary to comply with 7.21.
Testing shall be done in accordance with 8.3.
7.12.3 Exhalation valve(s) (if fitted) shall continue to operate correctly after a continuous flow of 300 l/min over a period of 30 s.
Testing shall be done in accordance with 8.6.1.
7.12.4 Where the exhalation valve housing is attached to the faceblank, the housing shall withstand axially a tensile force of 10 N applied for 10 s.
Testing shall be done in accordance with 8.6.2.
7.13
Packaging
The device and its replaceable parts shall be offered for sale packaged in such a way that they are protected against mechanical damage and contamination before use.
Gas and combined filters shall be factory sealed to protect the filter media against environmental influences in such a way, that the breaking of the factory sealing can be identified.
Testing shall be done in accordance with 8.3.
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EN 1827:1999+A1:2009 (E)
9 7.14
Mass
The total weight of filter(s) used in devices meeting the requirements of this European Standard shall not exceed 300 g.
Testing shall be done in accordance with 8.3.
7.15
Gas filter capacity
NOTE
The minimum breakthrough time is intended only for laboratory tests under standardized conditions. It does not give an indication of the possible service time in practical use. Possible service times can differ from the breakthrough times determined according to this European Standard in both directions, positive or negative, depending on the conditions of use.
7.15.1 The filters shall meet the requirements for minimum breakthrough times given in tables 1, 2 or 3.
Testing shall be done in accordance with 8.7.
7.15.2 Where the filter is designed for a combination of types of gases, it shall meet the requirements of each type separately.
Testing shall be done in accordance with 8.7. SIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
10
Table 1 - Minimum breakthrough times for gas filters of types FM A, FM B, FM E and FM K
Filter Test gas Test gas concentration in air Breakthrough concentration Minimum breakthrough time
Type and class
% by volume mg/l
ml/m³
min FM A1 Cyclohexane (C6H12) 0,1
3,5 10 70 FM B1 Chlorine (Cl2) 0,1
3,0
0,5 20
Hydrogen sulfide (H2S) 0,1
1,4 10 40
Hydrogen cyanide (HCN) 0,1
1,1
101) 25 FM E1 Sulfur dioxide (SO2) 0,1
2,7 5 20 FM K1 Ammonia (NH3) 0,1
0,7 25 50 FM A2 Cyclohexane (C6H12) 0,5 17,5 10 35 FM B2 Chlorine (Cl2) 0,5 15,0
0,5 20
Hydrogen sulfide (H2S) 0,5
7,1 10 40
Hydrogen cyanide (HCN) 0,5
5,6
101) 25 FM E2 Sulfur dioxide (SO2) 0,5 13,3 5 20 FM K2 Ammonia (NH3) 0,5
3,5 25 40 1) C2N2
can sometimes be present in the effluent air. The total concentration of (C2N2 + HCN) shall not exceed 10 ml/m³.
SIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
11 Table 2 - Minimum breakthrough times for gas filters of type FM AX
Filter
Test gas
Test gas concentration in air
Breakthrough concentration
Minimum breakthrough time
Type
% by volume
mg/l ml/m³ min
FM AX
Dimethylether (CH3OCH3)
Isobutane (C4H10)
0,05
0,25
0,95
6,0
5
5
50
50
Table 3 - Minimum breakthrough times for gas filters of type FM SX
Sorption
When tested in accordance with !7.8.5.1 of EN 14387:2004", FM SX filters shall have a breakthrough time of not less than 20 min
Desorption
When tested in accordance with !7.8.5.2 of EN 14387:2004", the effluent concentration from FM SX filters shall not exceed 5 ml/m³ of test gas
7.16
Particle filter penetration
The requirements for the maximum penetration of the test aerosol as specified in EN 143 for each class of particle filter shall be met.
Testing shall be done in accordance with 8.8.
7.17
Clogging (Optional)
7.17.1
General
!For single shift use separable particle filtering elements, the clogging test is an optional test." When such devices are claimed to meet clogging performance requirements they shall be subjected to the dolomite dust clogging procedure specified in EN 149.
7.17.2
Filter penetration
!After the clogging procedure, the filter penetration shall not exceed the values given in 7.16
Testing shall be done in accordance with 5.2 of EN13274-7:2008."
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EN 1827:1999+A1:2009 (E)
12 7.17.3
Breathing resistance
7.17.3.1
Devices with exhalation valves
a) the inhalation resistance shall not exceed the values given in table 4;
b) the exhalation resistance shall not exceed 3 mbar at 160 l/min continuous flow (table 4).
Testing shall be done in accordance with 8.11.
7.17.3.2
Devices without exhalation valves
The inhalation and exhalation resistance shall not exceed the values given in table 4.
Testing shall be done in accordance with 8.11.
Table 4 - Maximum breathing resistance after clogging
Devices with exhalation valves Devices without exhalation valves
Type
Class Maximum inhalation resistance at 95 l/min
mbar Maximum exhalation resistance at 160 l/min
mbar Maximum inhalation and exhalation resistance at 95 l/min
mbar FM P1 4,0 3,0 3,0 FM P2 FM P3 5,0 7,0 3,0 3,0 4,0 5,0 FM Gas1 P1 8,0 3,0 3,0 FM Gas1 P2 FM Gas1 P3 9,0 11,0 3,0 3,0 4,0 5,0 FM Gas2 P1 9,6 3,0 3,0 FM Gas2 P2 FM Gas2 P3 10,6 12,6 3,0 3,0 4,0 5,0 FM AX P1 9,6 3,0 3,0 FM AX P2 FM AX P3 10,6 12,6 3,0 3,0 4,0 5,0 FM SX P1 9,6 3,0 3,0 FM SX P2 FM SX P3 10,6 12,6 3,0 3,0 4,0 5,0
7.18
Compatibility with skin
Materials that can come into contact with the wearer's skin shall not be known to be likely to cause irritation or any other adverse effect to health.
Testing shall be done in accordance with 8.3.
7.19
Carbon dioxide content of inhalation air
The carbon dioxide content of the inhalation air (dead space) shall not exceed an average of 1,0 % by volume.
Testing shall be done in accordance with 8.10.
SIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
13 7.20
Breathing resistance without clogging
7.20.1 General
The breathing resistances of complete devices with the various combinations of filters shall meet the requirements of tables 5, 6 and 7 as appropriate.
7.20.2 Inhalation resistance
7.20.2.1 Half masks with gas filters
The inhalation resistance shall meet the requirements specified in table 5.
Testing shall be done in accordance with 8.11.
Table 5 - Inhalation resistance
Type
Class
Maximum resistance
mbar
30 l/min
95 l/min FM Gas1 1,0 4,0 FM Gas2 1,4 5,6 FM AX 1,4 5,6 FM SX 1,4 5,6
7.20.2.2 Half masks with combined filters
The inhalation resistance shall meet the requirements specified in table 6.
Testing shall be done in accordance with 8.11.
SIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
14 Table 6 - Inhalation resistance
Type
Class
Maximum resistance
mbar
30 l/min 95 l/min FM Gas1 P1 1,6 6,1 FM Gas1 P2 1,7 6,4 FM Gas1 P3 2,2 8,2 FM Gas2 P1 2,0 7,7 FM Gas2 P2 2,1 8,0 FM Gas2 P3 2,6 9,8 FM AX P1 2,0 7,7 FM AX P2 2,1 8,0 FM AX P3 2,6 9,8 FM SX P1 2,0 7,7 FM SX P2 2,1 8,0 FM SX P3 2,6 9,8
7.20.2.3 Half masks with particle filters
The inhalation resistance shall meet the requirements given in table 7.
Testing shall be done in accordance with 8.11.
Table 7 - Inhalation resistance
Type
Class
Maximum resistance
mbar
30 l/min
95 l/min
FM P1
0,6
2,1 FM P2 0,7 2,4 FM P3
1,2 4,2
7.20.3 Exhalation resistance
The exhalation resistance of the complete device shall not exceed 3 mbar.
Testing shall be done in accordance with 8.11.
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EN 1827:1999+A1:2009 (E)
15 7.21
Inward leakage
The values of inward leakage including valve leakage (if applicable) and filter connection leakage shall comply with the following:
For half masks fitted in accordance with the information supplied by the manufacturer, at least 46 out of the 50 individual results for the inward leakage over each of the exercise periods as defined in 8.12.7 (i.e. 10 subjects x 5 exercise periods) shall be not greater than 5 % and, in addition, at least 8 out of the 10 individual wearer arithmetic means (10 subjects) for the inward leakage, averaged over all exercise periods shall be not greater than 2 %.
Testing shall be done in accordance with 8.12.
7.22
Field of vision
The field of vision is acceptable if determined so in practical performance tests.
Testing shall be done in accordance with 8.13.
7.23
Practical performance
The device shall undergo practical performance tests under realistic conditions. These general tests serve the purpose of checking the equipment for imperfections that cannot be determined by the tests described elsewhere in this European Standard.
Where practical performance tests show the apparatus has imperfections related to wearer's acceptance, the test house shall provide full details of those parts of the practical performance tests which revealed these imperfections. This will enable other test houses to duplicate the tests and assess the results thereof.
Testing shall be done in accordance with 8.13.
8
Testing
8.1
General
Before performing tests involving human subjects account should be taken of any national regulations concerning the medical history, examination or supervision of the test subjects.
If no special measuring devices and methods are specified commonly used devices and methods shall be used.
8.2
Conditioning
8.2.1 General
Where conditioning is required before subsequent testing the procedures shall be one or more of those described in 8.2.2, 8.2.3 and 8.2.4 as specified in the relevant clauses.
8.2.2 Temperature conditioning (T.C.)
The complete device in the state as received shall be subjected to the following thermal cycle:
a) for 24 h to a dry atmosphere at (70 ± 3) °C;
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EN 1827:1999+A1:2009 (E)
16
b) for 24 h to a temperature of (-30 ± 3) °C,
and allowed to return to room temperature for at least 4 h between exposures and prior to subsequent testing.
The conditioning shall be carried out in a manner which ensures that no thermal shock occurs.
8.2.3
Mechanical strength (M.S.)
8.2.3.1
Apparatus The apparatus as shown schematically in figure 1, consists of a steel case (K) which is fixed on a vertically moving piston (S), capable of being lifted up to 20 mm by a rotating cam (N) and dropping down onto a steel plate (P) under its own mass as the cam rotates. The mass of the steel case shall be more than 10 kg. The mass of the steel plate onto which the steel case falls should be at least 10times the mass of the steel case. This may be achieved by bolting the steel plate to a hard floor without dampening elements. 8.2.3.2
Procedure The devices or filters shall be tested as received, removed from their packaging but still sealed. The devices shall be placed vertically in the case (K) so that the sealed packages do not touch each other during the test, allowing 6 mm horizontal movement and free vertical movement. The test apparatus shall be operated at the rate of approximately 100 rotations/min for approximately 20 min and a total of 2000 rotations. After the test, any loose material that may have been released from the device shall be removed prior to the performance testing. SIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
17
Dimensions in millimetres
Key
S Piston K Steel case P Steel plate N Cam
Figure 1 - Test equipment for test of mechanical strength
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EN 1827:1999+A1:2009 (E)
18
8.2.4 Simulated wearing (S.W.)
Conditioning by simulated wearing shall be carried out by the following process. A breathing machine is adjusted to 25 cycles/min and 2,0 l/stroke. The half mask is mounted on a Sheffield dummy head. For testing, a saturator is incorporated in the exhalation branch between the breathing machine and the dummy head, the saturator being set at a temperature in excess of 37 °C to allow for the cooling of the air before it reaches the mouth of the dummy head. The air shall be saturated at (37 ± 2) °C at the mouth of the dummy head. In order to prevent excess water spilling out of the dummy's mouth and contaminating the half mask the head shall be inclined so that the water runs away from the mouth and is collected in a trap.
The breathing machine is brought into operation, the saturator switched on and the test equipment allowed to stabilize. The half mask under test shall then be mounted on the dummy head. During the test time of 3 h in total at approximately 20 min intervals the half mask shall be completely removed from the dummy head and refitted such that during the test period it is fitted ten times to the dummy head.
8.3
Visual inspection
All samples are subject to visual inspection as specified elsewhere in this European Standard.
The visual inspection shall be carried out where appropriate by the test house prior to laboratory or practical performance tests.
8.4
Flammability
A total of four devices shall be tested: two in the state as received and two after temperature conditioning in accordance with 8.2.2.
The single burner test is carried out according to the following procedure.
The facepiece is put on a metallic dummy head which is motorized such that it describes a horizontal circle with a linear speed, measured at the tip of the nose, of (60 ± 5) mm/s.
The head is arranged to pass over a propane burner the position of which can be adjusted. By means of a suitable gauge, the distance between the top of the burner and the lowest part of the facepiece (when positioned directly over the burner) shall be set to (20 ± 2) mm.
A burner described in !ISO 6941" has been found suitable.
With the head turned away from the area adjacent to the burner, the propane gas is turned on, the pressure adjusted to between 0,2 bar and 0,3 bar and the gas ignited. By means of a needle valve and fine adjustments to the supply pressure, the flame height shall be set to (40 ± 4) mm. This is measured with a suitable gauge. The temperature of the flame measured at a height of (20 ± 2) mm above the burner tip by means of a 1,5 mm diameter mineral insulated thermocouple probe, shall be (800 ± 50) °C.
Failure to meet the temperature requirement indicates that a fault such as a partially blocked burner exists. This shall need to be rectified.
The head is set in motion and the effect of passing the facepiece once through the flame shall be noted.
SIST EN 1827:1999+A1:2009
EN 1827:1999+A1:2009 (E)
19 The test shall be repeated to enable an assessment to be made of all materials on the exterior of the device. Any one component shall be passed through the flame once only.
8.5
Cleaning and disinfecting
As many samples shall be cleaned and disinfected following the description in the information supplied by the manufacturer as are used for the inward leakage tests.
Compliance shall be assessed during the tests described in 8.12.
8.6
Exhalation valves (if fitted)
8.6.1 Exhalation valve (flow test)
A total of three samples shall be tested: one in the state as received and two temperature conditioned in accordance with 8.2.2.
8.6.2 Exhalation valve (pull test)
A total of three samples shall be
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