ISO-23431 › Measurement of road tunnel air quality

ISO-23431 - 1ST EDITION - CURRENT


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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.

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13.040.20 (Ambient atmospheres Including indoor air)

93.060 (Tunnel construction)

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Document Number

ISO 23431:2021

Revision Level

1ST EDITION

Status

Current

Publication Date

March 1, 2021

Committee Number

ISO/TC 146/SC 3