Document nNpVe3kE9oQ4vYEDO48wjZwG

attachments such that the dust created is arrested at the source and collected in filter bags. Commercial devices ere available but normally firms with a sincere interest in pollution control, design and fabricate their own devices.' Two examples of such " devices are shown in Figures 6 and 7. These control hoods work on the high velocity, low volume principle and can be readily adapted to industrial vacuum cleaner systems. When arrest-at-the-source systems are not possible, tech niques similar to those employed by the asbestos spraying industry may be utilized. Rules which relate more specifically to fabrication of asbestos products may be found in such publi cations asr 1. . "Recommended Practices for Fabricating, Handling and Construction industries," Health and Safety Council-Asbestos Cement Products Association. 2. "Recommended Health Safety Practices for Handling and Applying Thermal Insulation Products Containing Asbestos." National insulation Manufacturers Association (NIMA). 3. The Asbestos Research Council -. Control and Safety Guides (London, England). 4. "Recommendations for Handling Asbestos," Engineering Equipment Users Association (EEUA). E.E.U.A. Hand book No. 33. 3.3.3 Friction Material Applications Typical friction materials contain 30 to 50% asbestos ana may., he jjp ho. 70%. -and the industry that Tnmml act urea these ma terials is ranked third (1969) in the consung>tion of asbestos fibers. Crysotile is the preferred variety because it has better frictional properties than amphibol asbestos and does not exert so much wear on the opposing surface. The major uses of asbestos-containing friction materials include brake linings, brake discs and clutch facings. These products have been applied to a wide variety of industrial and commercial products. IT RESEARCH INSTITUTE 22