EN 143:2000 – Respiratory protective devices – Particle filters – Requirements, testing, marking

EN 143:2000

This European Standard specifies particle filters for use as components in unassisted respiratory protective
devices with the exception of escape apparatus and filtering facepieces.
Laboratory tests are included for the assessment of compliance with the requirements.
Some filters complying with this European Standard may also be suitable for use with other types of respiratory protective devices and, if so, shall be tested and marked according to the appropriate European Standard.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.
EN 132 Respiratory protective devices – Definitions of terms and pictograms.
EN 134 Respiratory protective devices – Nomenclature of components.
EN 148-1 Respiratory protective devices – Threads for facepieces – Part 1: Standard thread connection.
3 Definitions
For the purposes of this European Standard the definitions in EN 132 and the nomenclature given in EN 134 apply, together with the following:
Re-usable filter
Filter intended to be used for more than a single shift
4 Description
Air enters the particle filter(s) and passes to the facepiece after removal of particles.
5 Classification
Particle filters are classified according to their filtering efficiency. There are three classes of particle filters:
P1, P2 and P3 in ascending order of the filtering efficiency.
assified as single shift use only, or may be re-usable (more than one shift).
The protection provided by a P2- or P3-filter includes that provided by the filter of lower class or classes.
6 Designation
Particle filters meeting the requirements of this European Standard shall be designated in the following manner:
particle filter EN 143, filter type, class, option e.g. particle filter EN 143 P3 NR
7 Requirements
7.1 General
In all tests, all test samples shall meet the requirements.
7.2 Nominal values and tolerances
Unless otherwise specified, the values stated in this European Standard are expressed as nominal values. Except for temperature limits, values which are not stated as maximum or minimum shall be subject to a tolerance of ? 5 %. Unless otherwise specified, the ambient temperature for testing shall generally be (24 ? 8) ?C but for the mechanical tests (20 ? 1 0) ?C. Other temperature limits shall be subject to an accuracy of   1  C.
7.3 Visual inspecton
The visual inspection shall be carried out prior to laboratory tests and as specified elsewhere in this standard.
Testing shall be done in accordance with 8.2.
EN 143:2000 – Respiratory protective devices – Particle filters – Requirements, testing, marking

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