NS EN 138 : 1ED 1994

Cooperating organizations
National foreword
Foreword
Specification
Introduction
1 Scope
2 Normative references
3 Definitions and nomenclature
4 Description
5 Classification
6 Requirements
7 Testing
8 Marking
9 Instructions for use
Tables
1 Classification of apparatus
2 Strength of breathing hose connections
3 Breathing resistance
4 Testing schedule
Figures
1 Measurement of strength of couplings
2 Wooden blocks as used in practical performance test
3 Schematic diagram of flammability test apparatus
4 Measurement of collapse of air supply hose
5 Arrangement of apparatus for assessment of
    resistance to kinking
6 Arrangement to assess strength of air supply hose
7 Box for testing exhalation valve leakage
8 Measurement of exhalation valve leakage using a
    single cylinder breathing machine
9 Measurement of exhalation valve leakage using a twin
    cylinder breathing machine
National annexes
NA (informative) Committees responsible
NB (informative) Cross-references

Specifies minimum requirements for fresh air hose breathing apparatus for use with a full face mask, a half mask or a mouthpiece assembly as a respiratory protective device. Coverage includes: description, classification, marking, and definitions and nomenclature. Also gives detailed tables and diagrams.