Respiratory Protection FAQs
How do I choose among a half-mask respirator, PAPR and SAR?
Start with the specific respiratory hazards, exposure levels and required protection. Half-mask respirators are compact and fit under many welding helmets. Powered air-purifying respirators (PAPRs) use a blower to deliver filtered ambient air. Supplied-air respirators (SARs) provide breathing air from an independent source but may limit mobility because of the air hose.
Do welding respirators require fit testing?
Fit testing depends on the facepiece. Tight-fitting respirators require fit testing before initial use, when changing facepieces and at least annually. This includes tight-fitting PAPR and SAR configurations. Loose-fitting helmets and hoods generally do not require fit testing. Tight-fitting respirators also require a user seal check each time they are worn.
What does Assigned Protection Factor mean?
Assigned Protection Factor (APF) is the level of workplace respiratory protection a respirator is expected to provide when used correctly as part of an effective respiratory protection program. APF varies based on the respirator type, facepiece and operating mode. A hazard assessment can help determine the level of protection required.
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