I.S. EN 141:2000

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Description
5 Classification
   5.1 Introduction
   5.2 Types of filters
        5.2.1 Gas filters
        5.2.2 Multi-type gas filters
        5.2.3 Combined filters
        5.2.4 Special filters
   5.3 Classes of filters
6 Designation
7 Requirements
   7.1 General
   7.2 Nominal values and tolerances
   7.3 Visual inspection
   7.4 Connection
   7.5 Mass
   7.6 Multiple filters
   7.7 Material
   7.8 Packaging
   7.9 Mechanical strength (M.S.)
   7.10 Temperature conditioning (T.C.)
   7.11 Breathing resistance
   7.12 Gas capacity
   7.13 Combined filters
        7.13.1 General
        7.13.2 Filter penetration
   7.14 Clogging (optional)
        7.14.1 General
        7.14.2 Filter penetration
        7.14.3 Breathing resistance
8 Testing
   8.1 General
   8.2 Visual inspection
   8.3 Mechanical strength (M.S.)
        8.3.1 Test equipment
        8.3.2 Test procedure
   8.4 Temperature conditioning (T.C.)
   8.5 Test flow conditions
        8.5.1 General
        8.5.2 Multiple filters
   8.6 Breathing resistance
   8.7 Gas capacity
        8.7.1 General
        8.7.2 Filters Type A, B, E and K
        8.7.3 Special filters
   8.8 Filter penetration
9 Marking
   9.1 General
   9.2 Filters
   9.3 Special markings
   9.4 Filter package
10 Information supplied by the manufacturer
Annex ZA (informative) Clauses of this European Standard
         addressing essential requirements or other
         provisions of EU Directive

Refers to gas filters and combined filters for use as components in unassisted respiratory protective devices with the exception of escape apparatus and filtering facepieces.