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 Certifications of pellet

Certifications of pellet


A certified pellet responds to parameters dictated by the certifying body.
Certification standards change from country to country:

  • Austria: Önorm M7135
  • Germany: DIN 51731 and DIN Plus
  • Great Britain: The British Biogen Code of Practice for Biofuel
  • United States of America: Standard Regulations & Standards for pellet in the US (The PFI)
  • Switzerland: SN 166000
  • Sweden: SS 187120....


Currently there are no pellet quality standards in Ukraine and Russia.
However, the products mainly focus on the German Din Plus standard.


From 1 January 2010 the new EN 14961-2 quality standards are valid in Europe, which are confirmed by the international EN Plus certificate.


According to this international system there are three quality classes:

  1. EN Plus A1
  2. EN Plus A2
  3. EN Plus-B


In any quality class the material is not allowed to be chemically treated.
In addition, according to ISO 17020 and ISO 17025, external controls on production sites are carried out once a year by accredited testing institutes. Further checks are planned, if is necessary.


Let's examine the various certifications ...


DIN Plus

This standard prescribes that the pellet be produced with "virgin wood" starting material free from contaminants (glues, preservatives, preservatives).
In manufacturing, however, it is allowed to use non-chemically modified thermo-agglutinants (wheat, rye or starch flour) which, however, can not exceed 2% of the product.
The pellet can be light or dark. It is normally bagged on bags bearing the name of the manufacturer, the main characteristics and the words "Norma DIN Plus".


Önorm M7135


Also this standard, like the Din Plus, prescribes that the pellet be produced with starting material "virgin wood" devoid of contaminants (glues, preservatives, preservatives).
In manufacturing, however, it is allowed to use non-chemically modified thermo-agglutinants (wheat, rye or starch flour) which, however, can not exceed 2% of the product.
The pellet can be light or dark. It is normally bagged on bags bearing the name of the manufacturer, the main characteristics and the words "Önorm M7135".
The pellet producer has to stipulate a "surveillance contract" with an accredited testing institute that will perform an initial check and, subsequently, a check without warning once a year.
Furthermore, the manufacturer must regularly carry out weekly self-tests of the specific gravity, of the water content and of the rubbing residue and also keep a register of the agglutinants used.


SN 166000


The current legislation in Switzerland, which contains all the criteria for the production of pellets, is SN 166000.
This standard is identical to the antecedent DIN 51731.


DIN 51731


The DIN 51731 regulations judge the quality and suitability of the pellets only in part, compared to other more stringent regulations.
The limit values are very large and therefore leave a wide spectrum of individual parameters available to the producer.
In this case, there are no external controls on the pellets.

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