BS N 4:1974
Specification for full face mask assemblies for use in contaminated atmospheres

Standard No.

BS N 4:1974

Release Date

1974

Published By

British Standards Institution (BSI)

Status

Withdraw

Latest

BS N 4:1974

Scope

This British Standard contains minimum performance requirements for the manufacture of full face mask assemblies intended for use by aircraft flight personnel whilst dispelling the source of atmospheric contamination during flight. The mask assemblies are suitable for use with respirable air or oxygen supplied by demand, continuous flow or re-breathing systems.

BS N 4:1974 history

• 1974 BS N 4:1974 Specification for full face mask assemblies for use in contaminated atmospheres