Document e5qrn55O8e153abn39Oe6gMwE

Preliminary Dust Surrey for Asbestos Textile Institute, June, 1947. 7 msTiwo post cowrooL amcncEs The following discussion of Aunt control practices in tbs industry is merely an outline. 7b be useful to those vho are responsible for the engineering in each plant, they vill seed to be set forth in the fom of detailed, specificstiana describing details of construction, speclflcatione for sheet metal contractors, for purchase of ftae of proper capacity and for design and operation of dust collectors. Preparation Highly variable practices prevail in different plants and the bis-' collarsous character of operations vlthin a single plant mates it Impractical to formulate mny general statements. EovB-rer, It may be said that such con trol ee is realized results from the use of modem equipment that is veil en closed vhlch usually incorporates pneumatic conveyors vith celling con densers . large movement of air Involved in piy'catle transport serves the . .. - useful additional purpose of preventing the escape of dost Area the primary equipment. Discharge of stock frem celling ccndoneors into bins, stock boras, ' or feed hoppers is a dust usually not under control. The blending operation la another source vhlch is often not satisfactorily controlled. With the ex ception of these tiro ccoaon operations, most of the dust control procedures re quired vill be more or lees specific for each plant. Carding As has been noted, reduction of dustiness in carding to concentra tions of three million or less Is easily attained by good enclosure of the machine and carefully designed exhaust. Moreover, experience of several t