Respiratory protective devices for use against chemical, biological, radiological and nuclear (CBRN) agents - Self-contained open-circuit compressed air breathing apparatus incorporating a hood for escape. Specification

Tank manufacturers

This application will not necessarily require all tests

and aerodynamic origin

Published Document (PD) 6689 gives guidance on the use of BS EN 12271 and BS EN 12273 in the United Kingdom

ensure cleanliness and prevent transmission of any infectious disease

This standard may not apply to all batch control applications

It is also applicable in assessing the leachability in hot or boiling water of metals from non-metallic products and the extraction from such products of substances that may be of concern to public health

Molecular mass has been changed to molecular weight according to the IUPAC rule

in accordance with the Performance Standards for Daylight Signalling Lamps [IMO Resolution MSC

This part of BS EN ISO 11137 gives guidance to these requirements

BS ISO 8178-5 may be applied to engines used

The items of chemical analysis described in ISO 21068