Codes & Standards - Purchase
ISO 23431:2021
Measurement of road tunnel air quality
SKU: iso_075571_176167
Published by ISO
Publication Year 2021
1 Edition
31 pages
Product Details
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.