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download between 0-24 hoursReleased: 2021
ISO 23431:2021
ISO 23431:2021-Measurement of road tunnel air quality
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180.00 EUR
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| Standard´s number: | ISO 23431:2021 |
| Pages: | 31 |
| Edition: | 1 |
| Released: | 2021 |
DESCRIPTION
ISO 23431:2021
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.