Improperwelding,burning,andcuttingcanbedangerous,buttheycanbedonesafelybyfollowingsetofprocedures.Thisguideincludesalistofpotentialhazardsassociatedwiththesetasksandrulesbywhichthehazardscanbecontrolled.Thefollowinginformationisintendedforuseonmanydifferenttypesofconstructionprojectsandisverygeneralinnature.Specificjobrulesmaydictatemorestringentrequirementsorspecialprocedures.INDUSTRIALHYGIENEWelding,burning,&cuttingWelding,burning,&cuttingApril2012IndustrialHygieneWelding,burning&cuttingwww.saif.com©SAIFCorporationPage2of17IndustrialHygieneWelding,burning&cuttingApril2012WeldingGeneralweldingprecautions1.Electrodeholdersshouldbeingoodrepairandratedforthemaximumcapacityofequipmentused.2.Allcablesandconnectorsshouldbeingoodrepair,tightlyattached,fullyinsulated,andratedforthemaximumcapacityofthework.3.Theweldingleadwillhaveasafecurrentcapacityequalto,orgreaterthan,thespecifiedmaximumoutputofthearcweldingorcuttingunitwhichitserves.4.Whenasingleworkleadservicesmorethanoneunit,itssafecurrentcarryingcapacityshouldequalorexceedthetotalspecifiedmaximumoutputcapacitiesofalltheunitswhichitservices.5.Allelectricalequipment(weldingmachines)andworkshouldbeproperlygrounded.Theweldingleadisnotagroundlead.Itisusedonlytocompletetheelectricalcircuit.Aseparateconnectionmayberequiredtogroundtheworkpiece.Donotmistaketheworkleadforground.6.Pipelinescontaininggasesorflammableliquids,orconduitscontainingelectricalcircuits,shouldnotbeusedasaground.7.Whenelectrodeholdersaretobeleftunattended,theelectrodeshouldberemovedandtheholdersplacedorprotectedsothattheycannotmakeelectricalcontactwithpersonnelorconductingobjects.Alwaysputstubendsinpropercontainers,notonthefloor.8.Donotweldwhilestandinginwater,orifclothingandglovesarewet.9.Inspectequipmentforlooseconnectionsorbareordamagedwires.Donotusefaultyequipment.10.Haveworkersturnofftheweldingmachineattheendoftheshiftorwhentheywillnotbeusingitforanextendedperiod.IndustrialHygieneWelding,burning&cuttingwww.saif.com©SAIFCorporationPage3of17IndustrialHygieneWelding,burning&cuttingApril2012Fire1.Sparksorspatterfromweldingorarcgougingmayigniteburnableitemsinthearea.Alwaysbesurehotworkareashaveaminimum35-footclearareafreeofcombustiblematerials.2.Burnablematerialsshouldberemovedfromtheareawhereweldingorarcgougingistotakeplaceorprotectedwithflame-retardantmaterials.Useafirewatchasappropriate.3.Whenweldingondecks,walls,oroverhead,besuretotakethenecessaryprecautionstopreventfireorheatdamageinadjacentrooms.Useafirewatchintheotheraffectedroom(s)whenappropriate.4.Sparksandspatterfromarcgougingtravelconsiderabledistances.Wheneverpossible,orientthesparkstreamtominimizeconcernforfireordamageresultingfromthesparkstream.Usefire-retardantshieldingand/orfirewatchasappropriate.5.Besuretohavefullknowledgeofthelocationanduseofallfireextinguishingequipmentinthearea.Explosions1.Donotweldorusearcgougingequipmentwhenthesmellofpropane,acetylene,oranyotherfuelorgasispresent.Determinethecauseoftheleakandgetitcorrected.2.Donotperformany“hotwork”(electricorgaswelding,cutting,andbrazingorsimilarflame-producingoperationsandgrinding)in,oron,atankorcontainerunlessitisproperlyvented.3.Donotperformany“hotwork”in,oron,anyvessel,tank,orcontainerwhichcarries,orhascarried,flammablematerials,liquids,orgasesuntilthecontainerhasbeencleanedandtestedanddeclaredsafefor“hotwork”bythejobsafety...
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