EN 148-3:1999

Foreword
1 Scope
2 Dimensions, designation
Annex ZA (informative) Clauses of this European Standard
         addressing essential requirements or other
         provisions of EU Directives

This European Standard is applicable to self-contained compressed air breathing apparatus designed as positive pressure breathing apparatus. This European Standard specifies a thread connection, M 45 x 3, which may optionally be used for facepieces for positive pressure breathing apparatus. This European Standard does not apply to negative pressure breathing apparatus, to closed-circuit breathing apparatus or to diving equipment.