Products

Products traded in the Exchange shall be defined as combinations of biomass types and delivery periods.

Technical specifications of wood chip products since 2017-01-01

Code SM1 SM1W SM2 SM3
Moisture content (min. – max.), % as received 20 % – 45 % 35 % – 55 % 35 % – 55 % 35 % – 60 %
Ash content, % of dry basis up to 2 % up to 2 % up to 3 % up to 5 %
Main fraction, mm (min quantity, %)7 3.15 ≤ P ≤ 63
(min 80%)
3.15 ≤ P ≤ 63
(min 80%)
3.15 ≤ P ≤ 63

(min 70%)

3.15 ≤ P ≤ 63

(min 60%)

Allowable quantity of the small particles fraction (<3.15 mm), % Up to 2% Up to 5% Up to 10% Up to 25%
Large fraction (max cross-section 6 cm2), mm (max quantity, %)7 > 100
(up to 10% of weight)
> 100
(up to 10% of weight)
> 100
(up to 10% of weight)
> 100
(up to 10% of weight)
Maximum allowable length, mm7  <1505  <1505  <1505  <2205
Chlorine content (% of dry matter)4 <0.02% <0.02% <0.02% <0.03%
Raw material (table 1) 1 1; 2.1; 2.2 1; 2; 3; 4.1 All
Allowable admixtures Dry leaves, dry needles4 Leaves, needles (both dry and not dry)

ADDITIONAL MANDATORY PROVISIONS:

  1. In case of a dispute concerning the compliance of delivered biomass with the fraction size requirements, the fraction distribution test shall be performed by means of sieves according to the requirements of LST EN ISO 17827-1. The main fraction quantity shall be determined based on the biomass quantity that goes through the 63 mm sieve. The small particles fraction quantity shall be determined based on the biomass quantity that goes through the 3.15 mm sieve.
  2. For products SM1 and SM1W, the bark and sawdust naturally produced during production shall only be allowed (no additional bark or sawdust may be added to biomass).
  3. For products SM2 and SM3, additional bark and/or sawdust may be added to biomass, but the satisfaction of the set quality parameters (including the main fraction and small particles quantities) must be ensured in all cases.
  4. In case of disputes as to whether the leaves and/or needles present in the delivered biomass are dry or not, the dispute shall be settled by analyzing chlorine content at a laboratory.
  5. The 10 (ten) litre sample may consist of 2 pieces of wood chips with the length greater than the maximum allowable length, provided that the area of the cross-section of such a particle is smaller than 0.5 cm2.
  6. Chemically treated wood may not be used as a raw material for any one product. Chemically treated wood shall, inter alia, include, dyed, lacquered, glued, impregnated wood and/or wood that has undergone any other chemical treatment.
  7. For contracts according to the non-standard trade condition “Small fraction”, the following fraction size requirements shall apply:
    1. Main fraction, mm: 3.15 ≤ P ≤ 16;
    2. Large fraction, mm: P > 31.5;
    3. Maximum allowable length, mm: 90;
    4. In case of a dispute concerning the compliance of delivered biomass with the fraction size requirements, the fraction distribution test shall be performed by means of sieves according to the requirements of LST EN ISO 17827-1. The main fraction quantity shall be determined based on the biomass quantity that goes through the 31.5 mm sieves. The small particles fraction quantity shall be determined based on the biomass quantity that goes through the 3.15 mm sieve.
    5. The remaining requirements of the specifications shall be as stipulated in the standard specification for the respective product.

Table 1. Categories of raw materials

1. Stemwood 1.1 Broad-leaved trees
1.2 Coniferous trees
1.3 Mixed
2. Residues from wood processing industry 2.1 Half logs
2.2 Timber offcuts
2.3 Sawdust (quantity subject to limitation)
2.4 Shavings (quantity subject to limitation)
3. Whole trees without roots 3.1 Broad-leaved trees
3.2 Coniferous trees
3.3 Short-rotation coppice
3.4 Mixed
4. Logging residues 4.1 Tree stumps
4.2 Tops
4.3 Branches
4.4 Bushes
4.5 Stems of small trees (diameter of less than 5 cm at the height of 1.3 m)
4.6 Offcuts (from forestry operation)
5. Non-forest wood 5.1 Park, garden, roadside maintenance

Technical specifications of wood chip products until 2016-12-31

Code SM1 SM2 SM3 SM3S
Moisture content (min. – max.), % as received 20 % – 45 % 35 % – 55 % 35 % – 60 % 30 % – 55 %
Ash content, % of dry basis up to 2 % up to 3 % up to 5 % up to 5 %
Fraction size
(length-widththickness), mm
average 50-50-20
at least 90 %
50-50-20
at least 80 %
50-50-20
at least 80 %
15-15-15
at least 90 %
max 150-60-20 150-60-20 150-60-203 452
Fines in biomass up to 1 % up to 5 % up to 10 % up to 10 %
Dominant primary material1 A B C C

Explanations:
1.
A. Dried firewood, wood scrap, only microparticles formed in the course of production are allowed.
B. Allowed: material marked A and additionally waste from wood industry companies, with the quantity of dry needles and dry leaves not exceeding 5% (in addition to the microparticle fraction).
C. Allowed: materials marked A and B and additionally woodcutting waste (bark, sawdust, chopped wood, wood pieces, etc.). The quantity of bark, needles and leaves may not exceed 20%.

2. SM3S maximum wood chip fraction may not exceed 45 mm (the longest side must be measured), and the sum of all sides may not exceed 90 mm.

3. SM3 wood chip fraction may exceed 150 mm (the longest side must be measured), but the quantity of wood chips with this fraction may not exceed 1% of the delivered gross weight.

Additional Information: Conditions of Trade in Biomass Products.

Technical specifications of wood pellet products

Code MG1 MG2 MG3
Type of biomass wood pellets wood pellets wood pellets
Diameter mm 6+-1 or 8+-1 6+-1 or 8+-1 6+-1 or 8+-1
Length mm 3,15 <= L <= 40* 3,15 <= L <= 40* 3,15 <= L <= 40*
Moisture % as received <= 10 <= 10 <= 10
Ash % dry basis <= 0,7 <= 1,2 <=2
Mechanical durability % as received >= 98,0 >= 97,5 >= 97,5
Fines in biomass (<3,15 mm) % as received < 1,0 < 1,0 < 1,0
Nitrogen % dry basis <= 0,3 <= 0,5 <= 1,0
Sulfur % dry basis <= 0,04 <= 0,05 <= 0,05
Chlorine % dry basis <= 0,02 <= 0,02 <= 0,03
Ash Deformation Temperature °C >= 1200 >= 1100 >= 1100

* – a maximum of 1% of the pellets may be longer than 40mm, no pellets longer than 45mm are allowed

All wood pellet products must also meet the following requirements:

  • The amount of additives in production shall be limited to 1,8 w-%, the amount of post-production additives (e.g. coating oils) shall be limited to 0,2 w-% of the pellets.
  • Bulk density (BD) (kg/m3): 600 <= BD <= 750;
  • Net Calorific Value: >= 4,6 kWh/kg;
  • Limit for the temperature of pellets at the loading point for end-user deliveries: 40 °C;
  • Arsenic, mg/kg dry basis: <= 1,0;
  • Cadmium, mg/kg dry basis: <= 0,5;
  • Chromium, mg/kg dry basis: <= 10,0;
  • Copper, mg/kg dry basis: <= 10,0;
  • Lead, mg/kg dry basis: <= 10,0;
  • Mercury, mg/kg dry basis: <= 0,1;
  • Nickel, mg/kg dry basis: <= 10,0;
  • Zinc, mg/kg dry basis: <= 100,0.

Additional Information: Conditions of Trade in Biomass Products.

Technical specifications of peat product

Code KD
Type of fuel peat Prepackaged milled peat
Fraction size mm 0 — 63
Moisture % as received <= 50
Ash % as received <= 8
Chlorine % as received <= 0,03
Sulfur % as received <= 0,3

Additional Information: Rules of Trade in Fuel Peat.