ISO 17225-5:2021
Solid biofuels — Fuel specifications and classes — Part 5: Graded firewood
This document determines the fuel quality classes and specifications of graded firewood. This document covers only firewood produced from the following raw materials (see ISO 17725‑1:2021, Table 1):
— 1.1.1 Whole trees without roots;
— 1.1.3 Stem wood;
— 1.1.4 Logging residues (thick branches, tops etc.);
— 1.2.1 Chemically untreated by-products and residues from wood processing industry.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Specification of graded firewood8
Annex A (informative) Comparison of moisture content as received and dry basis
Annex B (informative) Measurement of firewood
Annex C (informative) Calculation of energy density
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Specification of graded firewood8
Annex A (informative) Comparison of moisture content as received and dry basis
Annex B (informative) Measurement of firewood
Annex C (informative) Calculation of energy density
Bibliography