SIST EN ISO 17828:2025 PDF

Overview - EN ISO 17828:2025 (Solid biofuels - Determination of bulk density)

EN ISO 17828:2025 / ISO 17828:2025 specifies a standardized laboratory method for determining the bulk density of pourable solid biofuels using defined measuring containers. The method applies to solid biofuels with a nominal top size up to 63 mm (maximum particle length 200 mm). For fuels with nominal top size larger than 63 mm, the standard prescribes an alternative procedure and a dedicated measuring container. The standard recognizes that bulk density is not absolute and standardizes test conditions so results are comparable across labs and supply chains.

Key topics and technical requirements

• Scope and materials: Pourable solid biofuels such as pellets, shavings, sawdust, wood chips and other biomass fractions that can flow in a continuous stream.
• Measuring containers:
  • Small standardized container (5 L) - typically used for pellets, fine fractions and kernels.
  • Standardized container (50 L) - for materials with nominal top size up to 63 mm.
  • Non-standard / large container (>1 m³) - for coarse biofuels with particle size >63 mm.
• Sample constraints: Maximum particle length limited to 200 mm for the main procedure.
• Apparatus: calibrated balances, standardized containers, scantlings, wooden board/impact surface; optional controlled shock exposure apparatus and spill-prevention aids.
• Procedure elements: determination of container volume, container selection, sample filling, optional controlled shock exposure (to reflect practical compaction during transport/storage), weighing and calculation.
• Calculations and reporting: bulk density reported as received (with optional dry-basis calculation), defined rounding rules and a revised test report clause.
• Performance characteristics: clauses on repeatability and reproducibility to support laboratory quality assurance.

Practical applications and users

• Where used: quality control labs, biomass producers, suppliers, transport operators, storage and logistics planners, heating plant operators and procurement teams.
• Why it matters: bulk density informs energy density (together with calorific value), determines transport and storage space requirements, supports invoicing and mass-volume conversions for deliveries, and helps assess compaction effects from vibration, shock, moisture changes, biodegradation and pressure.
• Beneficiaries: certification bodies, regulatory agencies, commercial buyers and sellers of solid biofuels, and research institutions studying biomass handling and logistics.

Related standards and context

• Supersedes EN ISO 17828:2015; developed by ISO/TC 238 in collaboration with CEN/TC 335.
• Useful alongside standards for moisture determination, particle size / grading, and calorific value when assessing overall fuel quality and energy content.

Keywords: EN ISO 17828:2025, ISO 17828:2025, solid biofuels, bulk density determination, measuring container, pellets, wood chips, biomass storage, biofuel quality.