ISO Test MethodsGraham Bostock

Convenor ISO TC94/SC15/WG1/PG4

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

Part 1 – Inward Leakage Part 2 – Breathing Resistance Part 3 – Particle Filter Penetration Part 4 – Gas and Vapour Filter Testing Part 5 – Tools Part 6 – Mechanical Tests Part 7 – Practical Performance

ISO 16900

Part 8 – Flow Measurement Part 9 – Rebreathed Carbon Dioxide Part 10 – Flame and Heat Part 11 – Field of Vision Part 12 – Work of Breathing Part 13 – Regenerating Breathing Apparatus Part 14 – Sound

ISO 16900

NaCl, Corn Oil or SF6 challenges. Panel of 25 test subjects selected by facial

dimensions. Extended exercise regime to include:

◦ Reaching up and down.◦ Squatting.◦ Hands and knees.◦ 18 minutes duration

Part 1: Inward Leakage

Part 1: Inward Leakage

First part to be published. Needs to be revised / updated.

◦ Uses EN headform.

Part 2: Breathing Resistance

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.

Part 3: Filter Penetration

ISO ENF1 20% FFP1/P1 20%F2 5% FFP2/P2 6%F3 1% FFP3 1%F4 0.1% TH3 0.2%F5 0.01% P3 0.05%

Part 3: Filter Penetration

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;

Part 3: Filter Penetration

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;

Part 3: Filter Penetration

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.

Migration and Desorption tests

Part 4: Gas and Vapour

Extended range of test gases.◦ OV, OG, AC, BC, NOX

AC: SO2/Cl2/H2S Low capacity class 1

◦ OV challenges 300 ppm 1000 ppm 3000 ppm 6000 (9000) ppm

High and low humidities.

Part 4: Gas and Vapour

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.

Part 5: Tools

Part 5: Tools

Bending Crushing Kinking Drop Tensile Rough handling

Part 6: Mechanical Tests

Walk Crawl Climb Shovel Lift Roll Read Communicate

Part 7: Practical Performance

Assisted Filtering Devices.◦ Sensitive to back pressure.

Zero back pressure method.◦ Plastic bag.

Interactive Flow Rate.◦ Flow varies with breathing pattern.◦ Measure pressure drop across the filter as a

function of flow.

Part 8: Flow

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

Part 9: Rebreathed Carbon Dioxide

Retain single and six burner tests. Hot wire test.

◦ Penetration by hot particles. Radiant heat test.

◦ Levels 1 and 2 extended arrays.◦ Level 3 Manikin test based on ISO 13506.

Flame engulfment.◦ Extended burners.

Part 10: Flame and Heat

Part 11: Field of Vision

Part 12: Work of Breathing

Displacement

Part 12: Work of Breathing

Pre

ssure

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

Part 13: Regenerating Apparatus

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”.

Part 14: Sound

Questions?