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In the vast majority of the countries, there are few or no laws written specifically for pellets. Often these come under the jurisdiction of only very general biomass laws.
Presently only few European countries like Austria , Sweden and Germany have official standards specifically for compacted biomass fuels. Other countries with significant pellet markets like Denmark and Finland have decided to wait for the completion of a common European pellet standard. Comprehensive work has been done on defining standard methods for analysing and classifying pellets and are defined in the report of CEN/TC 14961.
- Austria : ÖNORM M1735 (briquettes and pellets)
- Sweden : SS 187120 (pellets) and SS 187121 (briquettes)
- Germany : DIN 51731 (briquettes and pellets)
- Suggestion for European Classification: CEN/TS 14961 "Annex A" Examples of specifications for high quality classes of solid biofuels recommended for household usage
| Key Parameter |
Limits |
Category as per prCEN/TS 14961:2004 |
| Diameter |
As recommended by appliance Manufacturer usual size 6mm, 8mm |
D06, D08 |
| Average length |
L = 5 x diameter |
|
| Moisture content |
= 10.0% |
M 10 |
| Ash |
<0.5% |
A 0.5 |
| Sulphur |
<0.05% |
S 0.05 |
| Mechanical durability |
= 97.5% |
DU 97.5 |
| Amount of fines |
<1.0% |
F 1.0 |
| Additives |
None |
|
| Nitrogen |
= 0.3% |
N 0.3 |
| Net calorific value |
ca. 5,0 KWh/kg |
| Bulk density |
ca. 650 kg/m3 |
| Chlorine |
= 0.03% |
CL 0.03 |
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