Presentation on theme: "Graham Bostock Convenor ISO TC94/SC15/WG1/PG4. ISO TC94 – Technical Committee: PPE SC15 – Sub-Committee: Respiratory Protection WG1 – Working Group 1:"— Presentation transcript:
Graham 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
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
NaCl, Corn Oil or SF 6 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
First part to be published. Needs to be revised / updated. Uses EN headform.
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.
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/m 3 to 35 mg/m 3 ;
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/m 3 to 35 mg/m 3 ;
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
Extended range of test gases. OV, OG, AC, BC, NOX AC: SO 2 /Cl 2 /H 2 S Low capacity class 1 OV challenges 300 ppm 1000 ppm 3000 ppm 6000 (9000) ppm High and low humidities.
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.
Bending Crushing Kinking Drop Tensile Rough handling
Walk Crawl Climb Shovel Lift Roll Read Communicate
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.
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
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 Flame engulfment. Extended burners.
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
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.