Pellet Fuels Institute Standards
TABLE 1 PFI FUEL Grade Requirements
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Residential/Commercial Density Fuel Standards |
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Fuel Property |
PFI Super Premium |
PFI Premium |
PFI Standard |
PFI Utility |
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|
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|
|
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Bulk Density, lbs/cubic foot |
40.0 - 46.0 |
40.0 - 46.0 |
38.0 - 46.0 |
38.0 - 46.0 |
|
Diameter, inches |
0.250 - 0.285 |
0.250 - 0.285 |
0.250 - 0.285 |
0.250 - 0.285 |
|
Diameter, mm |
6.35 - 7.25 |
6.35 - 7.25 |
6.35 - 7.25 |
6.35 - 7.25 |
|
Pellet Durability Index |
>97.5 |
>97.5 |
>95.0 |
>95.0 |
|
Fines, % (at the mill gate) |
<0.50 |
<0.50 |
<0.50 |
<0.50 |
|
Inorganic Ash, % |
<0.50 |
<1.0 |
<2.0 |
<6.0 |
|
Length, % greater than 1.50 inches |
<1.0 |
<1.0 |
<1.0 |
<1.0 |
|
Moisture, % |
<6.0 |
<8.0 |
<8.0 |
<10.0 |
|
Chloride, ppm |
<300 |
<300 |
<300 |
<300 |
|
Heating Value |
As-Rec +/- 2SD |
As-Rec +/- 2SD |
As-Rec +/- 2SD |
As-Rec +/- 2SD |
Source:http://www.pelletheat.org/2/StandardSpecificationWithCopyright%20.pdf
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