BS EN 12941:1998+A2:2008

BS EN 12941:1998+A2:2008 Respiratory protective devices. Powered filtering devices incorporating a helmet or a hood. Requirements, testing, marking

BS EN 12941 specifies minimum requirements for powered filtering devices incorporating a helmet or a hood with gas, particle or combined filter(s) for respiratory protection. It does not cover devices designed for use in circumstances where there is or might be an oxygen deficiency (oxygen less than 17 % by volume). Also, it does not cover respiratory protective devices designed for escape purposes.

Laboratory and practical performance tests are included for the assessment of compliance with the requirements.

Contents of BS EN 12941:

• Foreword
• Introduction
• Scope
• Normative references
• Definitions and description
• Designation
• Classification
• Requirements
• Materials
• Resistance to temperature
• Helmets and hoods
• Inward leakage
• Breathing resistance
• Air supply
• Checking and warning facilities
• Clogging
• Electrical components
• Breathing hose
• Filters
• Noise level
• Carbon dioxide content of the inhalation air
• Resistance to flame
• Exhalation means
• Mass
• Practical performance
• Testing
• Conditioning
• Visual inspection
• Inward leakage
• Field of vision
• Visor robustness
• Breathing resistance
• Air supply flow rate
• Clogging
• Resistance to collapse of breathing hose
• Strength of hose and couplings and of connection between hood and breathing hose
• Mechanical strength of filters
• Filters
• Noise level
• Carbon dioxide content of the inhalation air
• Resistance to flame
• Practical performance
• Material porosity
• Marking
• Information supplied by the manufacturer
• Fitting procedure for hoods which seal around the neck and which mayor may not incorporate a head harness
• Marking
• Clauses of this European Standard addressing essential
• requirements or other provisions of EU Directives