Refractory Ceramic Fibers Osha

Provides an alphabetical listing of chemicals that have either a validated or partially validated osha method.

Refractory ceramic fibers osha. Synthetic vitreous fibers continuous filament glass fibers sampling and analytical methods. Rcfs belong to the class of synthetic vitreous fibers svfs materials that also include fibers of glass wool rock wool slag wool and specialty glass. Rcfs are amorphous synthetic fibers produced by the melting and blowing or spinning of calcined kaolin clay or a combination of alumina silica and other oxides. New pel for rcf in the workplace the state of california passed a permissible exposure limit of 0 2 f cc for refractory ceramic fiber rcf on february 3 2010 effective august 3 2010 enforcement of california s occupational health standards is the responsibility of the division of occupational safety and health dosh.

Fiberglass glass wool and glass filament mineral wool rock wool and slag wool and refractory ceramic fibers rcf. They typically are made of alumina silica and other metal oxides or less commonly of nonoxide materials such as silicon carbide. 2 refractory ceramic fibre rcf as used for insulation particularly in kilns and furnaces is a form of man made vitreous silicate fibre mmvf and consists of alumino silicate fibres which can cause irritation of the skin eyes and upper respiratory tract many being fine enough to be inhaled and deposited in the lungs. Rcf are a sub category of man made vitreous fibres mmvf manufactured for high temperature high performance thermal insulation applications and used mostly to line.

These fibers are classified into three general groups. 1 2 what are refractory ceramic fibres and high biopersistence fibres. Synthetic mineral fibers are fibrous inorganic substances made primarily from rock clay slag or glass. Ceramic fibers comprise a wide range of amorphous or crystalline synthetic mineral fibers characterized by their refractory properties i e stability at high temperatures iarc 1988.

The term hazardous is defined in the osha hazard communication standard 29 cfr 1910 1200 and does not necessarily imply the existence of any hazard. For fibers with diameters 1 μm polarizing light microscopy as in niosh method 7403 may be used to identify and eliminate interfering non crystalline fibers 6. They are used in commercial applications requiring lightweight insulation that is capable of withstanding high temperatures such as furnace and kiln insulation. Refractory ceramic fibers rcfi aluminosilicate 142844 00 6 5 mg m3 r 15 mg m3 t nej0 2 f cc 60 100 notes.

Exposed to synthetic mineral fibers in manufacturing and end use applications. Many workers in the u s. This method can be used in conjunction with electron microscopy e g method 7402 for assistance in identification of fibers. For additional information see osha s sampling and analysis safety and health topics page.