Wood pellets ENplus Grade

 
 

New Calorife Value
Ash Content      
Moisture Content
A1
≥4,040 Kcal/Kg
≤0.7% 
≤10%
A2
>4,040 Kcal/Kg 
≤1.5% 
≤10%
B
>4,040 Kcal/Kg
≤3%
≤10%

PELLET QUALITY
2.1 Quality Classes The ENplus certification program covers three pellet quality classes with different demands on the used raw material as well as the wood pellet characteristics. They correspond to the classes of the EN 14961-2 and are named: ƒ
ENplus-A1 ƒ ENplus-A2 ƒ EN-B
The pellet properties have to comply with EN 14961-2. Inspection and testing bodies have to follow the testing procedures described in EN 14961-2. Table 1 provides an overview of the most important pellet properties and their threshold values.
Table 1  Threshold values of the most important pellet parameters. More parameters can be found in EN 14961-2.


Property

Unit

ENplus-A1

ENplus-A2  

EN-B

Testing standard

Diameter

mm

6 or 8

EN 16127

Length

mm

3.15 ≤ L  ≤

EN 16127

Moisture Content

≤10

EN 14774-1

Ash Content

≤0.7

≤1.5

≤3.0

EN 14775(550°C)

Mechanical Durability

≥97.

≥96.

EN 15210-1

Fines (<3.15 mm)

<1

EN 15210-1

Net Calorific Value

16,5≤Q≤19

16,3≤Q≤19

16,0≤Q≤19

EN 14918

Bulk Density

≥600

EN 15103

Nitrogen Content

≤0.3

≤0.5

≤0.1

EN 15104

Sulfur Content

≤0.03

≤.04

EN 15289

Chlorine Content

≤0.02

≤0.03

EN 15289

Ash Melting Behavior

◦c

≥12000

≥11000

EN 15289

1) As received    2) Dry basis    3) A maximum  of 1 w-% of  the pellets may be longer than 40 mm, no pellets > 45 mm allowed 4) Deformation temperature, sample preparation at  815 °C

The ENplus requirements go beyond EN 14961-2 in the following points:  ƒ

  • Mandatory requirements on ash melting behavior (EN 14961-2 is voluntary) ƒ
  • ENplus-A1 requires an ash deformation temperature of ≥ 1200 °C.  ƒ
  • ENplus-A2 and EN-B require an ash deformation temperature of 1100 °C ƒ
  • The ash used for analyses is produced at 815 °C. ƒ
  • For EN-B, no chemically treated wood is allowed as raw material (see 2.2).
 

 


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