BS EN ISO 17225-4:2021

This standard BS EN ISO 17225-4:2021 Solid biofuels. Fuel specifications and classes is classified in these ICS categories:

• 75.160.40 Biofuels
• 27.190 Biological sources and alternative sources of energy

This document determines the fuel quality classes and specifications of graded wood chips. This document covers only wood chips produced from the following raw materials (see ISO 17225‑1:2021, Table 1):

• 1.1 Forest, plantation and other virgin wood;

• 1.2 By-products and residues from wood processing industry;

• 1.3.1 Chemically untreated used wood.

This document covers only wood chips, which are produced with sharp tools, and does not cover hog fuel, which is produced with blunt tools.