EN ISO 18135:2017

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principle
6 Establishing a sampling scheme (sampling plan)
7 Visual inspection
8 Number of increments
9 Calculation of the size of increment
10 Combined sample - Calculation of the volume of the
   combined sample
11 Sampling equipment
12 Sampling in practice
13 Sample generation for combined samples and laboratory
   samples
14 Performance characteristics
15 Handling and storage of samples
16 Sampling certificates
Annex A (informative) - Model sampling plan and sampling certificate
Annex B (informative) - Sampling from large stockpiles
Annex C (informative) - Bulk densities of solid biofuels
Annex D (informative) - Reference values for V[i] and V[PT]
Annex E (informative) - Guidelines for the number of increments
        to be taken
Annex F (informative) - Quality parameters for various solid
        biofuels in BIONORM projects and large shipments of
        wood pellets
Annex G (informative) - Single delivery sampling
Annex H (informative) - Continuous delivery sampling
Bibliography

ISO 18135:2017 describes methods for preparing sampling plans and certificates, as well as taking samples of solid biofuels, for example, from the place where the raw materials grow, from production plant, from deliveries, e.g. lorry loads, or from stock. It includes both manual and mechanical methods, and is applicable to solid biofuels that are either:- fine (particle sizes up to about 10 mm) and regularly shaped particulate materials that can be sampled using a scoop or pipe, for example, sawdust, olive stones and wood pellets;- coarse or irregularly shaped particulate materials (particle sizes up to about 200 mm) that can be sampled using a fork or shovel, for example, wood chips and nut shells, forest residue chips, and straw;- baled materials, for example, baled straw or grass;- large pieces (particle sizes above 200 mm) that are either picked manually or automatically;- vegetable waste, fibrous waste from virgin pulp production and from production of paper from pulp that has been dewatered;- thermally treated and densified biomass materials;- roundwood.ISO 18135:2017 is not applicable to airborne dust from solid biofuels. It may be possible to use this document for other solid biofuels.The methods described in this document may be used, for example, when the samples are to be tested for moisture content, ash content, calorific value, bulk density, durability, particle size distribution, ash melting behaviour and chemical composition.