37-Welding Cutting & Hot Work.pdfVIP专享VIP免费原创优质

MidlandEngineeringCo.,Inc.SafetyManagementSystemDocNo:WELDHOTInitialIssueDate12/14/15RevisionDate:InitialVersionChapter37-Welding,Cutting&HotWorkRevisionNo.0NextReviewDate:Preparation:SafetyMgrAuthority:PresidentIssuingDept:SafetyPage:Page1of7-1-Page1of7Uncontrolledcopyifprinted.Validondayofprintingonly.Printedon:14December2015©MidlandEngineeringCo.,Inc.PURPOSEToprovideguidelinesforthesafeoperationofwelding,cuttingandhotworkofequipment,andtoitemizesomeofthefundamentalhazardsinherentwiththeuseofthisequipment.SCOPEThisprocedureappliestoalloperationsinvolvingMidlandEngineeringCo.,Inc.REFERENCES29CFR1926.350,.354,.556,.153,.406,and.102DEFINITIONSFuelGasses-Acetyleneisanunstablegaswhencompressedabove15psig.Acetylenecylindersarefilledwithaporousmaterialandsaturatedwithliquidacetone.Acetylene,whenpumpedintothecylinder,dissolvesintheacetoneandisheldinastablecondition.Iftheacetylenecylinderisstoredorusedinthehorizontalposition,theacetonemayleakout,leavinganexplosivemixtureofacetylene.Itisforthisreason,thatallacetylenecylindersbestoredandusedintheuprightorverticalposition.HotWork-OSHAdefinitionmeansriveting,welding,flamecuttingorotherfireorspark-producingoperation.IndustrialGases-Oxygen-Oxygenitselfisnotflammable,butthepresenceofpureoxygenacceleratesthecombustionreaction.Inthepresenceofoxygen,oilandgreasebecomehighlyexplosive.MAPPGas-isastabilizedmixtureofmethylacetylone,andhasconsiderablyfewertendenciestobackfirethanacetylene.Maximumallowableusepressureis94psiversus15psiforacetylene.MidlandEngineeringCo.,Inc.SafetyManagementSystemDocNo:WELDHOTInitialIssueDate12/14/15RevisionDate:InitialVersionChapter37-Welding,Cutting&HotWorkRevisionNo.0NextReviewDate:Preparation:SafetyMgrAuthority:PresidentIssuingDept:SafetyPage:Page2of7-2-Page2of7Uncontrolledcopyifprinted.Validondayofprintingonly.Printedon:14December2015©MidlandEngineeringCo.,Inc.GENERALSAFEWORKPRACTICEEquipmentmustbeindustrialrated,ingoodconditionandalwaysbeinspectedbeforeeachuse.Neveruseoilorgreaseonanyfittingsorapparatusincontactwithoxygen.Blowoutthecylindervalvesbeforeattachingtheregulatorstothecylinders.Releasetheadjustingscrewpriortoopeningthecylindervalves.Neverstanddirectlyinfrontoforinbackofaregulatorwhenopeningthecylindervalve;standsothatthecylindervalveisbetweenyouandtheregulator.Alwaysopenthecylindervalvesslowly.Ifawrenchisused,keepitonthevalve.Anacetylenecylindershouldneverbeopenedmorethanonefullturn.Alwayspurgetheoxygenandfuelpassagesseparatelybeforelightingthetorch.Lightthefuelgasfirstbeforeopeningtheoxygenvalveonthetorch.Donottakeshortcutsorusedefectiveequipment.Defectiveequipmentshallbereportedandremovedfromserviceuntilrepaired.Neverbeginanyweldingorcuttingwithouttheproperpermits.Alwayschecktoseethatyouhaveappropriatefireprotectionequipmentimmediatelyavailablebeforedoinganyweldingorcutting.Weldersmustnotwearanyflammableordisposabletypeclothing.Weldersmustwearheadandeyeprotectionthatisrequiredintheareainwhichtheyareworking.Heli-arcandMIGweldingoperationsemitintenseultra-violetradiationthatcanresultinthirddegreeburnstoexposedskinareasaswellaspainfulflashburnstotheeyes.Weldinghoodsmustbecheckedperiodicallytoinsurethattheyarelighttight.Arcgouginggenerallyproducesagreatdealofslagandhotmetalsparks.Additionalpersonalprotectiveequipmentsuchasboots,nomexsuitsandmini-gogglesmaybeappro...