BS EN 14387:2004 – Respiratory protective devices — Gas filter(s) and combined filter(s) — Requirements, testing, marking
1 Scope
This European Standard refers to gas filters and combined filters for use as components in unassisted respiratory protective devices.
Filters for use against CO are excluded from this standard.
Laboratory tests are included for the assessment of compliance with the requirements.
Some filters complying with this standard can also be suitable for use with assisted respiratory protective devices and if so they need to be tested 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 (including amendments).
EN 1 32:1 998, Respiratory protective devices – Definitions of terms and pictograms.
EN 1 34:1 998, Respiratory protective devices – Nomenclature of components.
EN 1 43, Respiratory protective devices – Particle Filters – Requirements, testing, marking.
EN 1 48-1 , Respiratory protective devices – Threads for facepieces – Part 1 : Standard thread connection.
EN 1 48-2, Respiratory protective devices – Threads for facepieces – Part 2: Centre thread connection.
EN 1 48-3, Respiratory protective devices – Threads for facepieces – Part 3: Thread connection M 45 x 3.
EN 1 3274-3, Respiratory protective devices – Methods of test – Part 3: Determination of breathing resistance.
EN 1 3274-5, Respiratory protective devices – Methods of test – Part 5: Climatic conditions.
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 1 32:1 998 and EN 1 34:1 998 apply.
4 Description
Air enters the gas or combined filter(s) and passes to the facepiece after removal of gases and vapours or gases, vapours and particles.
5 Classification
5.1 Types of filters
5.1.1 Gas filters
Gas filters are produced in one of the following types: Types A, B, E, K, AX and SX.
Type A
For use against certain organic gases and vapours with a boiling point > 65 °C as specified by the manufacturer.
Type B
For use against certain inorganic gases and vapours as specified by the manufacturer.
Type E
For use against sulphur dioxide and other acidic gases and vapours as specified by the manufacturer.
Type K
For use against ammonia and organic ammonia derivatives as specified by the manufacturer.
Type AX
For use against certain organic gases and vapours with a boiling point ≤ 65 °C as specified by the manufacturer. For single use only.
Type SX
For use against specific named gases and vapours as specified by the manufacturer.
5.1.2 Multi-type gas filters
Filters which are a combination of two or more of the above types excluding type SX and which meet the requirements of each type separately.
5.1.3 Combined filters
Gas or multi-type gas filters incorporating a particle filter according to EN 1 43.
5.1.4 Special filters
Special filters are:
Type NOP3
For use against nitrogen oxides, e.g. NO, NO 2 , NO X .
Type HgP3
For use against mercury.
BS EN 14387:2004 – Respiratory protective devices — Gas filter(s) and combined filter(s) — Requirements, testing, marking