for Safer Welding

18Respiratory protectionRespiratory filter guideRemarksH = The chemical can be absorbed through the skin.Suggested Filter TypeK = The chemical can be cancer-inducing.S = The chemical can be a sensitizer.Chemical Particle GasCompressedAirRemarksCode Type of filterE. . Acid gases.A. . Organic gases, boiling point > 65 °C.AX Organic gases, boiling point < 65 °C.P Particle filter.B . . Inorganic gases.1) Argon and helium are inert gases which are not generallyabsorbed by canister type filters. These gases are not inthemselves hazardous but can displace oxygen from theair when present in confined spaces.2) Ozone is not readily filtered by absorption type filters,however, ozone reverts back to normal oxygen uponcontact with solid surfaces. The use of Speedglas orClearVisor with Adflo particle filter will reduce ozoneexposure (for further information please contact 3MTechnical service at your local 3M office)3) Chemical constituents of the welding fume with very lowOccupational Exposure Limits can pose special hazardsand are sometimes best protected against by use of theCompressed Air Respiratory System. If in doubt alwaysseek professional advice from your Safety Engineer.Occupational Exposure Limits (OELs) are given in theindividual countries national safety requirements.Get information for the UK on www.hse.gov.ukAluminiumPArgon Comp. Air 1)Beryllium P Comp. Air K, S 3)BromineBCadmium P KCarbon DioxideComp. AirCarbon MonoxideComp. AirChlorine B HChlorine DioxideBChromium Hexavalent P KChromium Trivalent PCopperPFluoridesPFluorineComp. AirHelium Comp. Air 1)Isocyanates Comp. Air SHydrogen Chloride B Comp. Air 3)Hydrogen Cyanide B Comp. Air H3)Hydrogen Fluoride B Comp. Air 3)Hydorgen SulphideBIron OxidePLeadPMagnesiumPManganesePNickel P SNitrogen DioxideComp. AirNitric OxideComp. AirOzone P ABE 2)Phosgene Comp. Air 3)PhosphineComp. AirSilicon DioxidePSulphur DioxideETrichloroethylene A KVanadium OxidePWhite SpiritAZincZinc ChlorideZinc OxidePPP