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Prepared by CPWR the Center for Construction Research and Training An Overview of Air-Purifying Respirators CPWR research project.

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Presentation on theme: "Prepared by CPWR the Center for Construction Research and Training An Overview of Air-Purifying Respirators CPWR research project."— Presentation transcript:

1 Prepared by CPWR the Center for Construction Research and Training An Overview of Air-Purifying Respirators CPWR research project

2 The hierarchy of controls has underpinned industrial hygiene control efforts for a long time EliminationSubstitutionModificationContainmentVentilationWork Practices PPE More reliance on workers

3 Is there an OSHA standard for respirators? Yes! Yes! General Industry 29 CFR Construction: 29 CFR Respiratory regulation may be contaminant specific

4 What is required in a written respiratory protection program? Respirator selection Medical evaluation Fit testing Proper procedures for routine and emergency use Proper inspection, cleaning, maintenance, and storing Training Program evaluation

5 Full-facehalf-face Respirators can be divided based on facial coverage

6 A key difference is the pressure inside the mask when inhaling Negative pressure Positive pressure

7 Powered air purifying respirators filter air, but keep a positive pressure in the face-piece PAPRs with tight fitting facepiece PAPR with loose fitting hood PAPR with loose fitting facepiece for welding

8 Air purifying respirators filter out dusts AND vapors Must have the correct color-coded cartridge and it must be NIOSH- approved

9 Cartridges to protect against silica exposures are magenta ColorTypeProtection against Magenta, purple High Efficiency Particulate Air (HEPA) Silica dust, asbestos fibers, lead particles Black Organic vaporSolvents Yellow Organic vapor and acid gases Brick cleaners

10 NIOSHs categories of particulate filters are based on oil mist degradation Not resistant N Resistant R Protective against P

11 Particulate filters are further classified base on efficiency 95 percent, designated percent, designated percent, designated 100 (HEPA filter)

12 This gives 9 categories of particulate respirators NRP

13 Method of particle capture Courtesy Roland Berry Ann, NIOSH

14 What is the most penetrating particle size? Particle diameter Efficiency Courtesy Roland Berry-Ann, NIOSH

15 OSHA requires that workers pass a fit test before wearing a respirator PortaCount Quantitative Fit Testing System Courtesy TSI, Inc. QuantitativeQualitative Allegro Complete Smoke Fit Test Kit Photo Courtesy Gemplers

16 User seal checks must be performed before each use Negative pressure checkPositive pressure check Image courtesy IUOE Hazmat Program and Robert Harrold

17 Storage and maintenance of respirators are often neglected

18 Follow manufacturers recommendations Use warm water and mild soap Air dry Cleaning is important and easy

19 Bruce Lippy, Ph.D., CIH, CSP CPWRs Director of Safety Research (direct line) Questions?


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