Selection of Personal Protective Equipment
Selection Flow Chart of Respiratory Protective Devices
Be sure to check the oxygen concentration and concentration of contaminants so as to select respiratory protective devices that is suitable to the contamination conditions of the air in the working environment.
The oxygen concentration in the Selection Flow Chart meets NIOSH regulations.
NIOSH : National Institute for Occupational Safety and Health (USA)
- Zoom Out
- Zoom In
Refer to your own national regulations.
START
Is the oxygen concentration more than 19.5% ?
NORMAL 21%
Is the type of contaminants known ?
What is the form of the contaminants ?
-
A Solid / Liquid
Particulate matter
(dust, fumes, mist, etc.) -
- B Gas
- C Mixture (A+B)
From of Contaminants
- Zoom Out
- Zoom In
| Type | Form | Definition | Example | ||
|---|---|---|---|---|---|
| Gas | Liquid | Solid | |||
| Gas | ● | - | - | Gases are gaseous substances at room temperature and atmospheric pressure (25°C, 1 atm.). | Ammonia, hydrogen sulfide, chlorine |
| Vapor | ● | - | - | Liquid or solid substances that sublimate at room temperature and atmospheric pressure (25°C, 1 atm.). | Organic vapors |
| Mist | - | ● | - | Liquid particles suspended in an atmosphere. | Acid mist, oil mist, spray mist |
| Fumes | - | - | ● | Fumes are solid particles formed by condensation of vaporized solid materials under high temperature. | Welding fumes, metal fumes |
| Dust | - | - | ● | Small solid particles produced when solid bodies are crushed without any change in chemical composition. | Dust by crushed stone and drilling |
| Smoke | ● | ● | ● | Airborne particles, liquid particles or gaseous matter produced by combustion, heat decomposition or chemical reaction of organic substances. | Cigarette smoke, funnel smoke |
| Smog | ● | ● | ● | Dust or funnel smoke that has combined with moisture to become mist. | Polluted air (exhaust gas) |