ISO 18135:2017描述了准备取样计划和证书的方法，以及固体生物燃料的取样方法，例如，从原材料生长地、生产工厂、交付（例如卡车装载）或库存中取样。它包括手动和机械方法，适用于以下固体生物燃料: -细颗粒（粒径约10 mm）和规则形状的颗粒材料，可使用勺子或管道取样，例如锯末、橄榄石和木屑； -可使用叉子或铲子取样的粗糙或形状不规则的颗粒材料（粒径约为200 mm），例如木屑和坚果壳、森林残留物碎屑和稻草； -打捆的材料，例如打捆的稻草或草； -手动或自动拾取的大块（粒径大于200 mm）； -植物废物、原浆生产产生的纤维废物和脱水纸浆造纸产生的纤维废物； -热处理和致密化生物质材料； -圆木。 ISO 18135:2017不适用于固体生物燃料产生的空气粉尘。本文件可能用于其他固体生物燃料。 例如，当测试样品的水分含量、灰分含量、热值、体积密度、耐久性、粒度分布、灰分熔融行为和化学成分时，可使用本文件中描述的方法。

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.