Emerson OXYMITTER 4000 - Manual (Page 28)

Instruction Manual
IB-106-340 Rev. 3.0
December 2003
P-20 Rosemount Analytical Inc. A Division of Emerson Process Management
Oxymitter 4000
SECTION IX. SPECIAL PRECAUTIONS
PRECAUTIONS TO BE TAKEN IN HANDLING AND STORING
General cleanliness should be followed.
The Toxicology data indicate that ceramic fiber should be handled with caution. The handling practices described in this
MSDS must be strictly followed. In particular, when handling refractory ceramic fiber in any application, special cau-
tion should be taken to avoid unnecessary cutting and tearing of the material to minimize generation of airborne dust.
It is recommended that full body clothing be worn to reduce the potential for skin irritation. Washable or disposable
clothing may be used. Do not take unwashed work clothing home. Work clothes should be washed separately from
other clothing. Rinse washing machine thoroughly after use. If clothing is to be laundered by someone else, inform
launderer of proper procedure. Work clothes and street clothes should be kept separate to prevent contamination.
Product which has been in service at elevated temperatures (greater than 1800ºF/982ºC) may undergo partial conversion
to cristobalite, a form of crystalline silica. This reaction occurs at the furnace lining hot face. As a consequence, this
material becomes more friable; special caution must be taken to minimize generation of airborne dust. The amount of
cristobalite present will depend on the temperature and length in service.
IARC has recently reviewed the animal, human, and other relevant experimental data on silica in order to critically
evaluate and classify the cancer causing potential. Based on its review, IARC classified crystalline silica as a group 2A
carcinogen (probable human carcinogen).
The OSHA permissible exposure limit (PEL for cristobalite is 0.05 mg/m
3 (respirable dust). The ACGIH threshold limit
value (TLV) for cristobalite is 0.05 mg/m 3 (respirable dust) (ACGIH 1991-92). Use NIOSH or MSHA approved equip-
ment when airborne exposure limits may be exceeded. The minimum respiratory protection recommended for given air-
borne fiber or cristobalite concentrations are:
CONCENTRATION
0-1 fiber/cc or 0-0.05 mg/m 3 cristobalite Optional disposable dust respirator (e.g. 3M 9970
(the OSHA PEL) or equivalent).
Up to 5 fibers/cc or up to 10 times the Half face, air-purifying respirator equipped with high
OSHA PEL for cristobalite efficiency particulate air (HEPA) filter cartridges
(e.g. 3M 6000 series with 2040 filter or equivalent).
Up to 25 fibers/cc or 50 times the OSHA Full face, air-purifying respirator with high efficiency
PEL for cristobalite (2.5 mg/m 3 ) particulate air (HEPA) filter cartridges (e.g. 3M 7800S
with 7255 filters or equivalent) or powered air -purifying
respirator (PARR) equipped with HEPA filter cartridges
(e.g. 3M W3265S with W3267 filters or equivalent).
Greater than 25 fibers/cc or 50 times the Full face, positive pressure supplied air respirator
OSHA PEL for cristobalite (2.5 mg/m 3 ) (e.g. 3M 7800S with W9435 hose & W3196 low
pressure regulator kit connected to clean air supply
or equivalent).
If airborne fiber or cristobalite concentrations are not known, as minimum protection, use NIOSH/MSHA approved half
face, air-purifying respirator with HEPA filter cartridges.