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sklademVydáno: 2021-03-23
BS ISO 23431:2021
Measurement of road tunnel air quality
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| Označení normy: | BS ISO 23431:2021 |
| Počet stran: | 40 |
| Vydáno: | 2021-03-23 |
| ISBN: | 978 0 539 02111 0 |
| Status: | Standard |
DESCRIPTION
BS ISO 23431:2021
This standard BS ISO 23431:2021 Measurement of road tunnel air quality is classified in these ICS categories:
- 93.060 Tunnel construction
- 13.040.20 Ambient atmospheres
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.