BS EN 138:1994 : Respiratory protective devices — Fresh air hose breathing apparatus for use with full face mask, half mask or mouthpiece assembly — Requirements, testing, marking
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This European Standard specifies minimum
requirements for fresh air hose breathing apparatus
for use with a full face mask, a half mask or a
mouthpiece assembly as a respiratory protective
device. Two classes of apparatus are covered, the
differentiation resulting from mechanical
performance and not respiratory protection. Escape
and diving apparatus and that used in abrasive
blasting operations are not covered by this
standard.
Laboratory and practical performance tests are
included for the assessment of compliance with the
requirements.
BS EN 138:1994 : Respiratory protective devices — Fresh air hose breathing apparatus for use with full face mask, half mask or mouthpiece assembly — Requirements, testing, marking