Document 93N2BREMb52nzyV4z5bpj5wbq

lotion of live! f rercxluie in:nd vrater used in. size and :!5f inerii rne *ilic* are most tosis. It involving hose inilies that r hazard vigilance `L It is, e vapor ! so that Mrr. Babbitt lx-aiing meta) contain- i: c .approximately 75 per .cent lead ii.ivr been encounleied. The <:ompoi- li.-it of voider mrtnl is variable and ilrjeidenl upon the purpose for which it is used, with ordinary soft v'ldrr containing a comparatively high percentage of lead. \ -sinning that die babbitt or solder coiit iins a significant amount of lead, the question then arises as to whether or r.ot employees worling with this material will become ill. Tin; answer (ull be given by a qualified indus trial hygienist after he bad seen the operation and considered such factor.-* a> the temperature to which the metal i* b ated, the method of removing ex- eesa solder, the length of exposure, and the effectiviiMM of thri rontrol me*ures provided, It is a well known fact that lead rau--es illness if ubiorUil in excessive amounts, and therefore operations where lead is used have received conidcrable study. Out rf thia experi ence certain practice* are Known to produce excessive exposure whereas other practices have b<en proved not to harmful. It in (generally con- ied.-d that excessive concentrations do not result from operations where solder is applied by incans of an elec tric soldering iron This is probably due to the small amounts of solder used and the comparatively low heat of the metal. When the iron in bailed in a small gas-fired furnace, the exposure may l*c of greater consequence. Solder which remains on the iron coining intii contact with the flame or heat is vulnerable for volatilization. Small nm.iunls of solder drop from the iron unto the hot floor of the furnace wlv-re it is readily volitilizcd or oxi diz'd. The oxidized material may be come airborne due disturbances created by the flame or by removing or placing the soldering iron in the furnace. >. Frequently industrial hygienists recommend tlint ventilation be pro vided for heating units of this type, thereby removing lesd fumes and du't from the environment. Thia is particularly true iu snail rooms or where many units are in use. \tmosphcric contamination occa sioned by the use of either gas or electrically heated pot* containing solder is dependent on a r umber of factors. With higher temperatures more volatilization will occur and the gr-ater will 1 the exposure. With the higlwr temperature the mctnl i more readily oxidi-ied to produce a Jro*a rnnlisting of a high pernla;;tj uf lead oxide. The dross may provide a protective coating to rc-ducc the vola tilization of the lead; liowrrcr. diturbance of lhi coating wiflVreatc an exposure. As a lifeguard against excowivc contamination, pot* containing noldrr or babbitt are usually ventilated. Wherever possible, it i* advisable to enclose the jrot a* completely a- posfblc and provide auilw ient air vol ume to overcome the thermal effects of tin:- inoilen metal. Attempt* have brn nude l<> ue palurul draft yen*' liblion sysletiu to control thoe fuiucs and in ihoac instances where the ducts were not of uf&cicnt dianirter the siftcii *aas inadequate. A preferable method is the use of mechanical systen*. Tin leiuoval of excesa solder with power-driven tools Mich as grinding wheels discs, or wire wheels, creates airborne dust which may contamin ate large ereas if the operation is extcisive. Diligent ne of abraaivc cloth will tl*o result in cxcetaive conccn- men mmm rmwe scale.. rpx fcfrAfeJ WORKERS ARE SAFER IN STJAHE S^fitlPROTIECTIVE GARMENTS Demit!Li*, burn* acid Injuries threatea worker*, not properly protected frx the mater(ala they use. StaSaf* Pro tective OanMiti ars declined to jire the worker maxlaim protection. Oils and Grease Acids and Caustics Tars and Creosote Paints and Lacquers Naphtha and Solvents Flame. Each of these represents a jwtcntial lost time accident Protect your workers against these ha7iards by standardizing on StaSafe Protective Garments. St<xk models scire many problems; Sta.iderd"t free daign service will develop a new model or modify tm easing one In solve your special nitty problem. . Write {or BnUetim No. 104 StaSafe Products are manufactured by \ STANDARD SAFETY EOU3FMENT COMPANY 232 Wc<* Oaterle Str*t, Chicago 10. IIIImU . N>V/ARK - - CUVIIAMP - * lO* AMOII IS