Graham Bostock: ISO Test Methods

Report
Graham Bostock
Convenor
ISO TC94/SC15/WG1/PG4
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ISO
TC94 – Technical Committee: PPE
SC15 – Sub-Committee: Respiratory
Protection
WG1 – Working Group 1: General
PG4 – Project Group 4: Test Methods
◦ CD: Committee Draft
◦ DIS: Draft International Standard
◦ FDIS: Final Draft International Standard
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Part
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1
2
3
4
5
6
7
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Inward Leakage
Breathing Resistance
Particle Filter Penetration
Gas and Vapour Filter Testing
Tools
Mechanical Tests
Practical Performance
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Part
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8 – Flow Measurement
9 – Rebreathed Carbon Dioxide
10 – Flame and Heat
11 – Field of Vision
12 – Work of Breathing
13 – Regenerating Breathing Apparatus
14 – Sound
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NaCl, Corn Oil or SF6 challenges.
Panel of 25 test subjects selected by facial
dimensions.
Extended exercise regime to include:
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Reaching up and down.
Squatting.
Hands and knees.
18 minutes duration
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First part to be published.
Needs to be revised / updated.
◦ Uses EN headform.
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NaCl and Paraffin Oil mist challenges.
Flame photometry and scattered light
detectors.
Flow rates 85 l/min and 135 l/min.
Exposure to 150 mg of the challenge aerosol.
 ISO
F1
F2
F3
F4
F5
EN
20%
5%
1%
0.1%
0.01%
FFP1/P1
FFP2/P2
FFP3
TH3
P3
20%
6%
1%
0.2%
0.05%
Sodium Chloride Aerosol
 the number median of particle size
distribution is between 0,06 µm and 0,10 µm
electromobility diameter, with a geometric
standard deviation between 1,4 and 1,8;
 the aerosol concentration is within the range
8 mg/m3 to 35 mg/m3;
Paraffin Oil Mist
 The number median of particle size
distribution is between 0,16 µm and 0,21 µm
electromobility diameter, with a geometric
standard deviation between 1,4 and 1,8;
 the aerosol concentration is within the range
15 mg/m3 to 35 mg/m3;
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Gas capacity test – 30 l/min
Gas filter validation test at specified flow
rates
◦ Gas and combined filters are exposed to a defined
test gas under enhanced flow rates to evaluate
whether breakthrough time exceeds a specified
minimum.
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Migration and Desorption tests
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Extended range of test gases.
◦ OV, OG, AC, BC, NOX
 AC: SO2/Cl2/H2S
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Low capacity class 1
◦ OV challenges
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300 ppm
1000 ppm
3000 ppm
6000 (9000) ppm
High and low humidities.
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Head forms.
Torso
Breathing machines / Metabolic simulators.
◦ Required performance parameters.
◦ Sinusoidal.
◦ Fixed displacements of 1.0, 1.5, 2.0, 2.5 and 3.0
litres.
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Bending
Crushing
Kinking
Drop
Tensile
Rough handling
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Walk
Crawl
Climb
Shovel
Lift
Roll
Read
Communicate
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Assisted Filtering Devices.
◦ Sensitive to back pressure.
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Zero back pressure method.
◦ Plastic bag.
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Interactive Flow Rate.
◦ Flow varies with breathing pattern.
◦ Measure pressure drop across the filter as a
function of flow.
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3 Test Methods
◦ Method 1 similar to present EN. Main and auxiliary
cylinders.
◦ Single breathing tube / ISO headform
• Measure at 10 l/min as worst case.
◦ To be resolved
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Retain single and six burner tests.
Hot wire test.
◦ Penetration by hot particles.
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Radiant heat test.
◦ Levels 1 and 2 extended arrays.
◦ Level 3 Manikin test based on ISO 13506.
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Flame engulfment.
◦ Extended burners.
Pressure
 Displacement
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Also known as closed circuit breathing
apparatus.
Specifies setting for measuring performance
◦ Tidal volume and frequency: to be changed during
the test.
◦ Carbon dioxide supply
◦ Oxygen consumption
◦ Temperature
◦ Humidity
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Measurement of unwanted sound – Noise.
Measurement of wanted sound – Warning
device.
Use a head form
◦ Higher value but more repeatable.
◦ Small microphones mounted in flat “ear”.
Questions?

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