RESPIRATORY PROTECTION EN Standards • EN136:1998 Full Face Mask Facepieces Class 1: Light Duty Class 2: General Use Class 3: Special Use (Heavy Duty/Firefighters) • EN140:1998 Half Face Mask Facepieces • EN14387:2008 Gas Filters and Combination Filters A: Organic gases and vapors with a boiling point >65°C B: Inorganic gases and vapors E: Sulfur dioxide and other acid gases and vapors K: Ammonia and organic ammonia derivatives Main Gas Filter Types: Class 1: Low capacity, up to 1000ppm Class 2: Medium capacity, up to 5000rpm Class 3: High capacity, up to 10,000pm • EN143:2007:Particulate Filters P1: Low Filter Performance (80% efficiency) P2: Medium Filter Performance (94% efficiency) P3: High Filter Performance (99.5% efficiency) Particulate Filter Classes: • EN148-1:Standard Threads for Facepieces • EN450:2001+A1:2009 Valved Filtering Half Mask with Fixed Gas Filters and/or Particulates Filters • EN149:2001+A1:2009 Respiratory Protective Devices- Filtering Half Masks To Protect Against Particles This European Standard covers particle filtering half masks i.e., disposable dust masks. With the A1:2009 amendment, these are now classified as either not reusable (NR) beyond a single working shift, or reusable for more than 1 shift(R). Disposable Mask Selection FFP3 FFP2 FFP1 Minimum Filtration % 99% 94% 80% Total Inward Leakage (TIL) 2% 8% 22% Nominal Protection Factor (NPF) 50 x WEL 12 x WEL 4 x WEL Assigned Protection Factor (APF) 20 x WEL 10 x WEL 4 x WEL TERMINOLOGY WEL: Workplace Exposure Limit Maximum contaminant concentration to which the user may be exposed without adverse health effects. TIL: Total Inward Leakage Combined leakage of the ambient atmosphere into the face piece via the filter media, valve, and face seal. NPF: Nominal Protection Factor Nominal level of protection given by respiratory PPE (in laboratory conditions) APF: Assigned Protection Factor Level of protection that can realistically be expected under real workplace conditions. DOLOMITE TEST (D): Clogging test under EN149 using dolomite dust. Respirators that pass the dolomite test are proven to provide a more comfortable breathing level and longer-lasting filtration performance. Such respirators are marked with the letter “D”. Dolomite testing is optional for single-use “NR” respirators and mandatory for reusable “R” respirators. 31
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