The following describes the NIOSH policy for respiratory protection against airborne exposures to crystalline silica. NIOSH recommends using half-facepiece particulate respirators with N95 or better filters for airborne exposure to crystalline silica at concentrations less than or equal to 0.5 mg/m3. The standard requires employers to ensure that no employee is exposed to an airborne silica concentration over the P.E.L. of 50 μg/m3, calculated as an 8-hour TWA. 29 C.F.R. § 1910.1053(c). It may take 20 or more years of exposure before a chest radiogram is positive for silicosis. Usually, there is little or no respiratory impairment associated with the early stages of simple silicosis. The silica content of the dust to which workers developing simple silicosis are exposed is often less than 30%. Because silicosis is caused by cumulative or repeated exposure to respirable crystalline silica, it makes sense that we would want to limit exposure as much as possible!
OSHA has set the Personal Exposure Limit (P.E.L.) at 50 micrograms per cubic meter of air, averaged over an 8-hour shift. The best options are N95/KN95 masks or respirators with P95 or P100 filters. This is. Also, OSHA requires the level of protection businesses provide employees if silica dust is present. How does the crystalline silica rule protect workers' health? The new rule requires that employers use engineering controls − such as ventilation and wet methods for cutting and sawing crystalline silica-containing materials − to reduce workers' exposure to silica dust. Silica Dust will float in the air for up to 12 days, give or take. The particles are very tiny. One spec of silica dust is almost 100 times smaller than a single grain of sand. Due to its size, silica dust stays suspended in the air longer than other dust particles. If you are looking for high quality, high purity, and cost-effective Fumed silica, or if you require the latest price of Fumed silica, please feel free to email contact mis-asia.
