This standard BS EN ISO 21645:2021 Solid recovered fuels. Methods for sampling is classified in these ICS categories:
75.160.40 Biofuels
75.160.10 Solid fuels
This document specifies methods for taking samples of solid recovered fuels for example from production plants, from deliveries or from stock. It includes manual and mechanical methods.
It is not applicable to solid recovered fuels that are formed by liquid or sludge, but it includes dewatered sludge.