Respiratory Protection Standards Disposable Masks
EN 149: 2001 +A1:2009 Respiratory Protective Devices – Filtering half masks to protect against particles
European Standard for filtering halfmasks. It contains laboratory tests to check the conformity with resistance to impacts, to cleansers and disinfectants, to temperature, to flame and with respiratory resistance. With A1:2009 amendment, filtering dust masks are now classied as either single use /single shift (NR) or reusable/more than 1 shift (R).
TLV: Contaminant concentration to which the user may be exposed without health effects.
TIL : Total INWARD LEAKAGE – Leakage of the ambient atmosphere into the respiratory interface.
NPF: Nominal Protection Factor – Nominal level of protection given by respiratory PPE (in Laboratory conditions).
APV: Assigned Protection Factor – Level of protection which can realistically be expected in the workplace conditions.
DOLOMITE TEST (D): Optional test under EN149 for clogging with dolomite dust. Respirators which pass the dolomite clogging test are proven to provide a more comfortable breathing level and longer lasting performances of filtration. These respirators are marked with “D” letter.