BS EN 12021:1999 pdf download

BS EN 12021:1999 pdf download.Respiratory protective devices – Compressed air for breathing apparatus.
BS EN 12021was approved by CEN on 4 December 1998. CEN members are botuid to comply with the CEN/CENELEC thternal Regulations
which stipulate the conditions for giving this European Starldar(l the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.
BS EN 12021 exists in three official versions (English, French, Genuan). A version in any other language made by translation tinder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
CEN members are BS EN 12021 bodies of Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, freland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
United Kmgdom.
This European Stafl(lard specifics requirenwnts for the quality of compressed air supplied for use with the following types of equ1)meflt.
a) Respiratory pr0teCt1V( (k’VlCCS — SClf-cOflt(lifl(’d open-circuit coflipressed air l)reatlung apparatus and open-circuit conipressed air underwater breathing apparatus (SCUBA).
b) Respiratory protective (leVices — compressed air line breathing apparatus an(I compressed airline breathing apparatus for use wider water.
c) Respiratory protective devices for escape — self—contained open—circuit comj )ressed air breathing apparatus Inclu(hng full face mask or mouthpiece assembly or hoods.
The stan(lar(l also applies tL) synthetic air. Account is taken of the use of air at normal ambient iressures and increased I)r(’ssLmns. Maximum al lowal )lC concentrations of iml)urlty for eornpresSe(I air arc quoted as values calculated at normal atmospheric pressure.
BS EN 12021 does not apply t.o compressed air used for me(hcal purposes, for underwater breathirig apparatus specially designed to be used for diving in water and other fluids when the hydrostatic preui exceeds 6 bar absolute or for breathing apparatus designed for use at high altitudes.
2 Normative references
BS EN 12021 incorporates, by dated or undated reference, provisions from other publications. These nonnative 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, Respinhto?y IT0t((1V’ derices — Definilkms
exceed 0,5 mg/rn3. Where synthetic lubricants are present, 6.2.1 applies.
6.2.3 Odour and taste
The air shall be without. significant odour or taste.
6.2.4 Carbon dioxide content
The carbon dioxide content shall not exceed 500 mI/rn3 (500 ppm).
6.2.5 Carbon monoxide content
The carbon monoxide content shall be as low as possible but not exceed 15 nWm1 (15 ppm).
6.3 Water content
6.3.1 There shall be no free liquid water.
6.3.2 Air for compressed air line breathing apparatus shall have a dewpoint sufficiently low to prevent condensation and freezing. Where the apparatus is used and stored at a known temperature the pressure dewpoint shall be at. least 5 °C below the likely 1owest temperature. Where the conditions of usage and storage of the compressed air supply is not known the.BS-EN-12021-1999

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