Page 7 - venus new 1

FAQs on Respiratory Protection
FAQs on Respiratory Protection

Common Definitions
Particles Visible to Human Eye
Common Definitions Particles Visible to Human Eye
Greater than or equal to 10 micron ( µ )
Greater than or equal to 10 micron ( µ )
100 µ 100 µ
80 µ 80 µ
Respiratory Protection Definitions
Respiratory Protection Definitions 60 µ 60 µ
(Reference - ISO / DIS 16972)
(Reference - ISO / DIS 16972) 40 µ 40 µ
Smoke
Identify the Hazard
Identify the Hazard 20 µ 20 µ
0 µ
0 µ
- Any atmosphere that is
Hazardous atmosphere
Hazardous atmosphere - Any atmosphere that is PM 10 PM 10 PM 2.5 PM 2.5
50-100 µ
50-100 µ
oxygen-deficient and/or the level of substances in
oxygen-deficient and/or the level of substances in Human hair Human hair Finest beach sand Finest beach sand Pollen 10-100 µ Pollen 10-100 µ
90 µ
90 µ
the atmosphere is at a concentration deemed to
the atmosphere is at a concentration deemed to
be hazardous
be hazardous
Aerosol - Suspension of solid, liquid or solid and liquid particles in a gaseous
Contaminant
- Undesirable solid, liquid or gaseous
Contaminant - Undesirable solid, liquid or gaseous Aerosol - Suspension of solid, liquid or solid and liquid particles in a gaseous
medium, having a negligible falling velocity (generally considered to be less
substance in the air
substance in the air medium, having a negligible falling velocity (generally considered to be less
than 0.25 m/s).
than 0.25 m/s).
- General term denoting finely distributed solid
- Gaseous phase of a substance which is liquid or solid at 20°C and
Mist Dust Dust - General term denoting finely distributed solid Vapour Vapour - Gaseous phase of a substance which is liquid or solid at 20°C and
100 kPa (absolute)
particles particles 100 kPa (absolute)
- Fluid that is in a gaseous state at standard temperature and pressure
Particle: Particle: Solid or liquid substances in the finely Gas Gas - Fluid that is in a gaseous state at standard temperature and pressure
Solid or liquid substances in the finely
that that
divided state
divided state expands to occupy the space or enclosure in which it is confined
expands to occupy the space or enclosure in which it is confined
FumeFume - Fine solid aerosol Mist Mist - General term denoting a liquid aerosol
- Fine solid aerosol
- General term denoting a liquid aerosol
Smoke Smoke - Aerosols generated by incomplete combustion consisting
- Aerosols generated by incomplete combustion consisting
of liquid and/or solid particles
of liquid and/or solid particles
Assess the hazard
Assess the hazard
Immediately Dangerous to Life or Health IDLH - Atmosphere that poses an
Immediately Dangerous to Life or Health IDLH - Atmosphere that poses an
immediate threat to life, would cause irreversible adverse health effects, or
immediate threat to life, would cause irreversible adverse health effects, or
would impair an individual's ability to escape from a hazardous atmosphere
would impair an individual's ability to escape from a hazardous atmosphere
- Maximum concentration of airborne
Occupational Exposure Limit (OEL)
Occupational Exposure Limit (OEL) - Maximum concentration of airborne
contaminants deemed to be acceptable, as defined by the authority having
contaminants deemed to be acceptable, as defined by the authority having Inhalable
Inhalable
jurisdiction
jurisdiction < 10µ < 10µ Thoracic
Thoracic
- Average concentration of a contaminant in
Time-Weighted Average (TWA)
Time-Weighted Average (TWA) - Average concentration of a contaminant in 5 -10µ 5 -10µ
air during a specific time period
air during a specific time period
Maximum Use Concentration (MUC)
Maximum Use Concentration (MUC) - Maximum atmospheric concentration
- Maximum atmospheric concentration
of hazardous substance from which the RPD wearer can be expected to be
of hazardous substance from which the RPD wearer can be expected to be
protected when wearing an RPD, and is determined by the Assigned Protection
protected when wearing an RPD, and is determined by the Assigned Protection
Factor of the respiratory protective device or class of respiratory protective
Factor of the respiratory protective device or class of respiratory protective
devices and the occupational exposure limit of the hazardous substance.
devices and the occupational exposure limit of the hazardous substance. Respirable
Respirable
0.3 - 5µ
Select the appropriate equipment
Select the appropriate equipment 0.3 - 5µ
- Protection level degree of respiratory protection allocated to
Protection level
Protection level - Protection level degree of respiratory protection allocated to
an RPD for purposes of selection and use that is expected to be provided to
an RPD for purposes of selection and use that is expected to be provided to
wearers when used within an effective RPD programme as described in ISO/TS
wearers when used within an effective RPD programme as described in ISO/TS
16975-1 and ISO/TS 16975-2
16975-1 and ISO/TS 16975-2
RPD RPD - Respiratory Protective Device
- Respiratory Protective Device
- Pressure inside the respiratory interface, hose etc. is higher
Positive pressure
Positive pressure - Pressure inside the respiratory interface, hose etc. is higher
(quantify) the amount of face-seal leakage into
than that of the ambient atmosphere
than that of the ambient atmosphere (quantify) the amount of face-seal leakage into
the RPD in order to assess the adequacy of its fit.
Negative pressure
- Pressure inside the respiratory interface, hose etc.
Negative pressure - Pressure inside the respiratory interface, hose etc. the RPD in order to assess the adequacy of its fit.
Qualitative fit test (QLFT)
- Pass/fail test method
that is lower than that of the ambient atmosphere
that is lower than that of the ambient atmosphere Qualitative fit test (QLFT) - Pass/fail test method
that relies on the subject's sensory response to
Training for use of the RPD
Training for use of the RPD that relies on the subject's sensory response to
detect a challenge agent in order to assess the
Fit test Fit test - Use of a specific protocol to qualitatively or quantitatively determine detect a challenge agent in order to assess the
- Use of a specific protocol to qualitatively or quantitatively determine
adequacy of RPD fit
an individual's ability to obtain an adequate seal with a specific make,
an individual's ability to obtain an adequate seal with a specific make, adequacy of RPD fit
- Leakage between the
Face seal leakage
model and size of a tight fitting respiratory interface
model and size of a tight fitting respiratory interface Face seal leakage - Leakage between the
wearer's face and the respiratory interface
Quantitative fit test (QNFT)
- Test method that
Quantitative fit test (QNFT) - Test method that wearer's face and the respiratory interface
uses an instrument to assess
uses an instrument to assess
7 7