Standards and Marking

EN 149:2001 Standard

The breathing protection face masks are devices suitable to protect the user against all the external agents which, if inhalated, can be a risk for health or safety. The respirators in compliance with EN 149:2001 standard have been conceived to grant protection against aerosol both liquid and solid, that are:  

Dust:

little solid particles suspended in the air deriving from the crushing of solid material. Example: milling, grinding, smoothing and abrasive processes.  

Mist:

little droplets of liquid materials deriving from atomization process of liquid materials. Example: plating, blending or production of metal dust.  

Smoke:

very little solid particles deriving from vaporizing process and then condensation in solid material due to high heat. Example: foundry, welding and flame cutting processes.

 

Clogging test with dolomite dust  

Optional test provided by the standard EN 149 measuring the performances of clogging resistance of a mask. The conformity to this test (which can be noticed with the “D” marking on the mask) guarantees a good level of breathability even in extreme cases of highly concentrated dust.

LEVEL OF PROTECTION

FILTERING EFFICIENCY OF THE MASK

FFP1

78 %

FFP2

92 %

FFP3

98 %

The standard EN 149 provides for a test for determination of filtering efficiency which expresses the quantity of contaminant filtered by the masks in laboratory conditions.  

 

Maximum concentration of contaminant allowed in the work environment according to levels of protection

LEVEL OF PROTECTION

NPF

 

FFP1

4

 x TLV

FFP2

12

 x TLV

FFP3

50

 x TLV

 

To determine the maximum concentration of contaminant allowed in the work environment it is necessary to multiply the Nominal Protection Factor (NPF) by TLV. NPF is the quantity of contaminant filtered by the masks while TLV is the average concentration of dangerous substances which a worker can be exposed to without suffering any harm. For example, “12xTLV” means that the FFP2 mask is suitable to protect the user in environments with a high concentration of contaminant up to 12 times the allowed maximum threshold.

REUSABILITY

The dust filtering half masks are classified according to their reusability over time and have the following markings:
NR which means not reusable : masks to be used during only one work shift
R which means reusable : masks to be used during more work shifts.


 

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