10.20 Oct 30, 2026
ISO
ISO/TC 156
International Standard
This document specifies an inspection method for classifying the appearance of rust formed on unpainted weathering steel structures into five levels. It covers visual observation, lighting and photographic recording, a supplementary tape peel test, judgment by evaluators, and the minimum contents of the inspection report.
PROJECT
ISO/NP 27237-2
10.20
New project ballot initiated
Oct 30, 2026