International Standard
ISO 23431:2021
Measurement of road tunnel air quality
Reference number
ISO 23431:2021
Edition 1
2021-03
International Standard
Read sample
ISO 23431:2021
75571
Published (Edition 1, 2021)

ISO 23431:2021

ISO 23431:2021
75571
Language
Format
CHF 151
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Abstract

This document describes methods for determining air speed and flow direction, CO, NO and NO2 concentrations and visibility in road tunnels using direct-reading instruments. This document specifically excludes requirements relating to instrument conformance testing.

General information

  •  : Published
     : 2021-03
    : International Standard published [60.60]
  •  : 1
     : 31
  • ISO/TC 146/SC 3
    93.060  13.040.20 
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