Transcription of Abrasive Blasting Operations, Engineering Control and Work ...
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ABRASIVEBLASTINGOPERATIONSE ngineeringControlandWorkPracticesManualE nviro-Management&Research, , "DEPARTMENTOFHEALTH,EDUCATION,ANDWELFARE P ublicHealthServiceCenterforDisceseContro lNationalInstituteforOccupationalSafetya ndHealthDivisionofPhysicalSciencesandEng ineeringCincinnati,Ohio45226 March1976 ForalllebytheSuperintendentofDocuments, , , , , , (NIOSH)76-179iiACKNOWLEDGDAENTSW eacknowledgewithgratefulappreciationthea ssistanceprovidedbytheAmericanFoundrymen 'sSocietyandTheAmericanIronandSteelInsti tute,a l'OUSmanufacturersofabrasl'veblastl'ngeq ul'pment, ,v rEngineeringBranch,DivisionofPhysicalSci encesandEngineering, ~~ ~itsinblastcleaningroomsHand-operatedcab inettypeblastcleaningmachinesAutomaticbl astcleaningmachLTlesWeiblastcleanL~ ~ . 2 SpecificmhC~ ') ,000abrasiveblastersareexposedtosilicadu st,inhalationofwhichcanleadtosilicosis, ; blast. mach. type 107 Generalsafetycontrols125involved;methods toidentifyhazards; , **vi** ,Education,andWelfare'sNationalInstitute forOccupationalSafetyandHealth(NIOSH) , , ,ontheaverage, (ThresholdLimitValue) ,suchasopen-airabrasiveblasting, ;thepotentialsafetyandhealthhazardsinvol vedinthesepractices; :Abrasiveblastingcanbedefinedasaprocesso fcleaningfu~dfinishingofmaterialsbyforce fuldirectionofanabrasivemediaappliedeith erdryorsuspendedinaliquidmedium, **CURRENTMETHODSANDOPERATIONS cleanasurfacebyremovingunwantedrust,scal e,paint,etc.
vessel) into a blast hose, as shown in Figure 11-2. The compressed air line is piped to both the blast hose &id upper portion of the pressure vessel. Air pressure (usually 80 to 90 psi) to both the hose and pressure vessel are equal thus permitting the free fall of the abrasive through an aperture (feed point) at the bottom of the pressure vessel.
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