Document 1pqgYZvxxdbj8rrkR5BeX1wq

m \) Q* ?* | Occupational Hazards of Pipe Insulators r i*H.'. c V *< 4r+ '' *.*: I- r* $, ! . nuux T.UA.VX MS. AMI M1TCKSU- . ZAVON. XID. CINCINNATI I THE DEATH of a member of the Inter- Rei-iewr of Literature Concerning Class aational Association of Heat and Frost Fibers.--Class fiber materials were first de Insulators and Asbestos Workers, resulting veloped by Owens-Coming Fiberglat Corpo from a Bacillus antkracis infection, focused ration in 1935, and in 1938 this company aRation on the potential occupational opened the first plant in the world for the baaards of this trade. An investigation of production of fibrous glass. the work which these men perform aod the Glass fibers are silicates and have the materials with which they come in contact following general composition: as undertaken in order to determine the nature of the hazard, if any, of this trade. To initiate the study, alt materials used by union members in the Cincinnati area were first reviewed and evaluated. These materials **ve divided into five major categories (A 10 E) according to their chemical composi te. Each of these will be dealt with indi vidually. An analysis of the job indicated that the tedling of fibrous glass, magnesium carbon* *tr and calcium silicate materials contain ** *'bestos fibers, adhesives, and cements uwvpies 80% to 90% of the average insuter'i wurking time. Accordingly, these rea- jtels were of particular interest and have *** reviewed in detail within the frsune- "i tin- major category in which thev reside. ' Silicon dioxide (SiOi) Oxides ot aluminum Calcium (Cal Magnesium (Mg) Boron _ ' M-c-'r ]-Irrr O il'", 0- i'r O-UVr Others additives: sodium Xa i. j>hcf>honu (P). iron (Fe), barium i.BaV titanium (TO. A phenol formaldehyde resin is applied to the glass fibers to bond and hold them in boards, mats, or wool-like masses. The resin is bonded securely to the glass fiber by heating to temperatures ranging from -aOF to 550 F. in order to prevent its removal from the glass and vice versa. Thus, the resin is not an airborne hazard in itself. .Glass fiber insulating materials have the following properties; they are incombustible and resistant to high temperature# i.UV t> TOO C): they are nonhvgroscopic. imputresei- ble, and do not deteriorate: they are stable, Chsi Insulating Materials not attacked by oils, corrosive fumes and The ir-..) giu, hu traditionally been tel. t m*inds of' men, with lace rations iorms of physical injury. In ad* ru"' ti, such physical insulu, there is reason "* rw-.cerned with the possible effects ***? te ingestion and inhalation of airborne r<les uf glass, since glass insulating ma- *r produced in forms that may give .. to airborne fibers and flakes of glass. ' te'l? roMktltai Ass *. 1HI ikiwJ S* Hi?Kmewf LaWuwr, Uwwrwtr Cmond * fit" m. GscmaL ,,,, . mSE* nrxai n Kmm* Utartar*. HTj^JSa tad Brttadi AmM CiaciaaU 4UIS acids (except hydrofluriel; they are not attacked by parasites, inites. termites, or rodents; they are resistant to traction, but are not elastic and have little resistance to friction and impact. Glass fibers commer cially serve as thermal, electrical, and acoustical insulators. Under the influence of sufficient friction or impact, the insulating material shatters into small glass fibers of varying lengths with jagged ends. Some of these fibers are of sufficiently small size to remain air borne for appreciable periods of tinte. thus Arch Enirot Healthi-I'M U. Aw H66 M VA. 8004 0031 HFM -011692 SCF-FA-5860