Welding Fume Exposure Limits (2026 Guide)
Welding fume has no single limit — OSHA regulates it substance by substance: hexavalent chromium at 5 micrograms, manganese at a never-exceed ceiling, iron oxide at 10 milligrams. This guide maps the numbers, the arc processes ranked by fume, OSHA's ventilation-first control ladder, and a worked stainless-shop compliance example.