|
Originally issued by Ministry of Labour Notification No. 19 of March
30, 1988
Latest Amendments: Ministry of Labour Notification No. 120 of December
25, 2000 |
| Test particulate |
Particulate |
Sodium
chloride (NaCl) |
Dioctyl
phthalate (DOP) |
| Particulate size |
From
0.06µm
to 0.1µm |
From
0.15µm to 0.25µm |
| Concentration |
Lower
than 50mg/m3 |
Lower than 100mg/m3 |
| Flow rate |
|
85LPM |
85LPM |
| Particulate filtering efficiency
(the particulate
filtering efficiency of the respirator
through the test duration shall exceed the
value described each in the right column
of the Table on the right, according to the
type of the respirator described in the left
column of the same Table). |
|
In case where
the test particulate
is sodium chloride, filtering
efficiency is measured
until the cumulative sodium
chloride supplied to the respirator
reaches at 100mg. |
In case where the test particulate
is dioctyl phthalate, filtering
efficiency is measured until
the cumulative dioctyl phthalate
supplied to the respirator
reaches at 200mg. |
| Replaceable particulate
respirator |
RS1 |
Over 80.0% |
RL1 |
Over 80.0% |
RS2 |
Over 95.0% |
RL2 |
Over 95.0% |
RS3 |
Over 99.9% |
RL3 |
Over 99.9% |
| Disposable particulate
respirator |
DS1 |
Over 80.0% |
DL1 |
Over 80.0% |
DS2 |
Over 95.0% |
DL2 |
Over 95.0% |
DS3 |
Over 99.9% |
DL3 |
Over 99.9% |
|
| |
Test
of inhalation resistance
(Flow rate at 40LPM) |
Replaceable particulate
respirator |
Disposable particulate
respirator |
RS1 RL1 |
Below 70Pa |
DS1 DL1 |
Below 60Pa (below 45Pa) |
RS2 RL2 |
Below
80Pa |
DS2 DL2 |
Below 70Pa (below 50Pa) |
RS3 RL3 |
Below
160Pa |
DS3
DL3 |
Below150Pa
(below 100Pa) |
|
( ) denotes those without exhalation valve |
Test
of exhalation resistance
(Flow rate at 40LPM) |
Replaceable
particulate respirator
|
Disposable
particulate respirator
|
RS1
RL1
|
Below
70Pa
|
DS1
DL1
|
Below
60Pa (below 45Pa)
|
RS2
RL2
|
Below
70Pa
|
DS2
DL2
|
Below
70Pa (below 50Pa)
|
RS3
RL3
|
Below
80Pa
|
DS3
DL3
|
Below
80Pa (below 100Pa)
|
|
( ) denotes those
without exhalation valve |
| Test of air tightness of
exhalation valve at work |
* The
inner pressure must quickly decrease when the inner air is
drawn.
*
The time required for the inner pressure to be restored up
to normal pressure must be
longer than 15 seconds. |
| Test of carbon dioxide concentration
increase in inspired air |
The difference
of carbon dioxide concentration in the inspired air between the
conditions with
and without the facepiece on the dummy head must be lower than
1.0%. |
| Dead space |
Value calculated from the
result of the test of carbon dioxide concentration increase in
inspired
air |
|
| Increased
value of inhalation resistance |
Test
particulate
|
Sodium
chloride (NaCl)
|
| Flow
rate |
After
test particulate is being accumulated on the respirator at a
flow rate of 85LPM, increased value of inhalation resistance
is measured at a flow rate of 40LPM. |
| Amount
of test particulate to be accumulated on the respirator prior
to measurement |
100mg |
|
Brief explanation on terminology |
Particulate Filtering Efficiency
The values, expressed
in percentage, show how much particulates the
respirator (filter) can capture. Generally speaking, filtering
performance
is better as the value increases, but inhalation resistance increases
at
the same time.
Inhalation Resistance
This is a criterion showing how easy the wearer can inhale while
donning
the respirator. Breathing is easier as the value decreases.
Exhalation Resistance
As opposed to inhalation resistance, this is a criterion showing
how
easy the wearer can exhale while donning the respirator. Breathing
is
easier as the value decreases.
Air Tightness of Exhalation Valve at Work
This is a test to confirm if the exhalation valve attaches firmly
on the exhalation
valve seat. As the inner pressure is negative, external air leaks
to the inside unless firmly attached. |
|
Carbon Dioxide Concentration Increase in Inspired
Air
This is a test to confirm if the difference of carbon dioxide concentration
in inspired air with the respirator installed on dummy head is
within 1%
compared to the one without the respirator.
Dead Space
This is the value calculated from the result of the test of carbon
dioxide
concentration increase in inspired air. The value also represents
effective
volume inside the respirator as it is being donned on face. As
the value
decreases (effective volume is smaller), concentration level of
carbon dioxide
decreases because air inside the respirator circulates more effectively.
Increased Value of Inhalation Resistance
The value shows how much inhalation resistance increases after
a
known amount of particulates is being captured by the filter. The
smaller
the value is, the longer the respirator can be used. |
|
| |
| Selection of particulate respirators appropriate for particulate
working environment |
Description of particulates and
corresponding works
|
Required
performance categories of particulate respirators |
Particulate respirators used in
the environment where there is a possibility of exposure to particulates,
such as dioxin,
during the work of waste material incineration.
Ordinance on Industrial Safety and Health, Article 592-5 |
Working environment without oil
mist |
RS3 RL3 |
| Working
environment with oil mist |
RL3 |
Particulate respirators used in the working
environment with a possibility of exposure to radioactive materials
due to
spillage or related emergency works.
Ordinance on Prevention of Ionizing Radiation Hazards, Article 38
|
Working
environment without oil mist |
RS3 RL3 |
| Working
environment with oil mist |
RL3 |
Particulate respirators used in the working
environment where metal fume (including
welding fume) diffuses.
Ordinance on Prevention of Lead Poisoning, Article 58
Ordinance on Prevention of Hazards Due to Specified Chemical Substance, Article
43
Ordinance on Prevention of Hazards Due to Dust, Article 27 |
Working
environment without oil mist |
RS2 RS3 DS2 DS3
RL2 RL3 DL2 DL3 |
| Working
environment with oil mist |
RL2 RL3 DL2 DL3 |
Particulate
respirators used in the working environment where particulates,
with the standard control concentration
level
of 0.1mg/m3 or less, diffuse.
Ordinance on Prevention of Lead Poisoning, Article 58
Ordinance on Prevention of Hazards Due to Specified Chemical Substance, Article
43 |
Working
environment without oil mist |
RS2 RS3 DS2 DS3
RL2 RL3 DL2 DL3 |
| Working
environment with oil mist |
RL2 RL3 DL2 DL3 |
| Particulate-related works except for the above. |
Working
environment without oil mist |
RS1 RS2 RS3 DS1 DS2 DS3
RL1 RL2 RL3 DL1 DL2 DL3 |
| Working
environment with oil mist |
RL1 RL2 RL3 DL1 DL2 DL3 |
|
| |
|
