The answer depends on what you are welding, not just that you are welding. Mild steel TIG or MIG in open air requires a P100 particulate filter at minimum. Welding galvanized steel, coated metals, or stainless in a confined space adds gas-phase hazards — ozone, hexavalent chromium, phosgene from…
OSHA mandates a minimum of NIOSH-certified P100 filtration for lead abatement operations under 29 CFR 1926.62 (construction) and 29 CFR 1910.1025 (general industry). P100 filters are rated at 99.97% efficiency against oil and non-oil aerosols — the highest particulate class NIOSH issues. A standard…
Not all cartridges are created equal — and for spray painting, the wrong choice is a regulatory violation and a health hazard. Spray coatings that contain isocyanates (polyurethane, two-part primers, automotive basecoats) require a combination OV+AG+P100 cartridge. Organic-vapor-only cartridges…
