When should a respirator or PAPR be used in welding operations?

• A. When local ventilation is insufficient to meet exposure limits or in confined spaces where fumes/gases accumulate
• B. Never
• C. Only during grinding
• D. After completing work

Answer: (A)

Protecting workers from welding fumes relies on respiratory protection when engineering controls alone can’t keep exposure within safe limits. In welding, fumes and gases are produced as metal is heated, and local ventilation or fume extraction is the first line of defense. If that ventilation is not enough to meet exposure limits, or if work happens in confined spaces where fumes can accumulate, a respirator or a powered air-purifying respirator (PAPR) must be used to prevent inhalation of hazardous substances. This protection is needed during the actual welding process, not only after it’s finished, and it’s used in addition to, not as a substitute for, good ventilation and other controls. Choose respiratory protection only when exposure assessments show it’s necessary, and follow a proper respiratory protection program that includes selection, fit testing, training, and medical evaluation.