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Facts e-H the FM Brasid
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Dnst? Wume .: and Mist ;
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What is the 9920?
The 3M Brand #9920 Dust, Fume, and Mist respirator is a
' NIOSH/MSHA approved half-mask respirator made from nonvvoven fibers designed for worker comfort and protection.
What SMJOSH/JViSBA approvals did the 9920 receive?
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-The #9920 Dust Fume and Mist Respirator was approved under , Subpart K of 30 CRF 11 CTC-21C-202, November 20,1978) for
respiratory protection against: ...
a) Dusts including but not limited to aluminum, flour, iron ore, free snica, coal, cadmium, chromium, lead and manganese..
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b) `Fumes of various metals including but not limited to alumi num, antimony, cadmium, chromium, copper, iron, lead,
" magnesium, manganese and zincs.
c) * Mists- produced by spray coating with vitreous enamels, - chromic add mist produced during chrommm plating, and
: other mists of materials whose liquid vehicle does not produce
. harmful gases or vapors.-
d) Radon daughters and radon daughters attached to dusts, ' fumes and mists.
e) Asbestos containing dusts and mists.
OCC 11054
Is the S920 classified as 3 HEPA
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No. HEPA refers to a high efficiency particulate filter. The HEPA filter must be at least 99..97% against 0.3 pm DOP particulates. The 9920 was tested against 0.4 to 0.6 pm silica partic ulates and against lead oxide fume particulates. In these tests, the 9920 is at least 99-9-r % efficient.
Doas iha 9920 OfJar
pwtsciion agelnsi
gases and vapors?
No. The 9920 offers protection against particulate materials only. Ho not use the 9920 for protection against gases cr vapors associ-
ated with spray paint
How long can .the 9920 be used?'
. The 9920 is designed* for use during a normal work period. It <-*ri
be used for longer periods provided that '
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a) breathing is not difficult, and b) therespirator is not physically damaged.
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Ian the 9920 be used for
protection against welding fumes?
Yes. The 9920 is approved for respiratory protection against metal fumes generated in welding operations for fumes of metals with a threshold limit value -- time weighted average (TLV-TWA) concentration greater than 0.05 mg/m3. The American Confer ence of Governmental Industrial Hygienists recommends a TLVTWA for welding fumes of 5 mg/m3 if no toxic elements are pres
ent in thewelding rod.
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In welding operations. No. The 9920 offers no protection against gases and vapors. How.
Wili She 9920 protect ' .ever, these gases are not normally at concent,ons tot wouid
against-the nitrogen. require resp.ratorypro.ect.on.
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oxides,carbon- ,. monoxide and 020ns that may be generated?
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Is Vnsre an GSHA standard or MIOSH recommendation on
welding?
No. Each contaminateis considered separately. The following is a table of metal fumes and gases that may be associated with weld ing operations.
OCC 11055
Maximum exposure Levels of Welding Fum as'and Gases
Material Fum
Arsenic (As)
Beryllium (Bo)
Cadmium Oxide (Cd)
Chromium ICr) PriVval* tC.n\
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Molybdenum {Mo) Nickel {Ni)
Zinc Oxide (ZnO) Welding fvmM Casas_________ ]_____ Carbon Dioxide (CO*) . Hydrogen Fluoride (HF)
Phosgene (COCI,)
Threshold Limit Valu**ia
Timfvnvvightad averages {TWA), mg/ms in S hours
ACGIH1* 10 0.5 .
OSHA a_ 05
NIOSH --
Short-tsrm
ts tSTELl,
mg/rrv* in 15 mirta
ACGIHb
20 05 .
OSHA -
NIOSH 0.002 '
0.002 0.05
0.002 0.1
0JQ4
0.025 0.15
0.005 03
0.005 1130 min)
0-2
1=
0.1' 0.2 2.5 5 0.15
1 10
5 5* 10f .
1
1.0=
0.1 0.1 2.5 10 0.2
15 _
5 I5f l;
0.001= O.025d
.-- 2-5
'- -- <0.05
0.015
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--- 10 0.45 -- -- 10" 20f --
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--------
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5
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0.03=
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10 io 0.05 5
5'
5 5
20 20 --
' 10
-- 0.1
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--, --
0.05 15
S.OpO
50 -3
5
0.1
: 0.1
5,000. ' 10,000
50 35 .3 2.5s
5 25 25
0.1 W r 0.T 0.1
15JDOO
400
--' -- 03
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--
-- --
30,000 (10 min)
200 59
1
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03
PauiblH*4lth Hazard WhenTLV IfExcs^d^d
Nuisance dust Lung 5 lymphatic cancer, respiratory irritant Lung cancer,pneumonitis
Lung and kidney effects, pulmonary edemv Lung cancer, skin ulcers, nasa?perforation Chemical pneumonitis Irritant, fume fever Kidney and bone effects Nuisance dust Systemic poisoning Fume few Nervous system disorders Respiratory irritant
Lung and nasa) cancer,'
skin effects
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Nuisance dust
Nuisance dust Eye, skin, and lung effects Fume fever
Depends on constituents
Respiratory effects
Asphyxiant Skin, eye irritation, - . bone effects / ' Airway effects Blood efteets Pulmonary edema Airway effects
> Threshold limit values for the measured element* and compounds, slven in VTM'**TM***'*TMTM'
in mg/m1 {milligrams per cubic metre) for particulate fumes and in ppm tp*r par million) for gases. ,. -
, ACCIHAmerican Conference of Governmental Industrial Hyg*enuw.
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listed . ",
Carcinogenic chromium. Moncarcinogenic chromium.
. . , ""
Soluble molybdenum,
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Insoluble molybdenum.
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Reported oemg/ms, milligrams of fluorine per cubic metre.
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forces WIOSH Research Report "Assessment of Selected Controlled Technology Techniques for Welding Fumes .
Report No. NIOSH 79*125.
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occ 11056