Overview
ISO 15791-1:2014 - Plastics - Development and use of intermediate-scale fire tests for plastics products - Part 1: General guidance - provides a practical framework for developing and using intermediate-scale fire tests for products made of or containing plastics. The standard describes typical plastic product applications, plausible fire scenarios (ignition, growth, large-room fires), and how to design intermediate-scale tests so results are relevant to real end-use conditions.
Key topics and requirements
- Scope and purpose: Framework guidance to ensure intermediate-scale tests reflect product end use (development, regulatory, quality control, pre‑selection).
- Types of plastics and composites: Thermoplastics, thermosets, elastomers, foams, fibre‑reinforced materials and laminated composites are covered.
- Fire scenarios: Definitions and examples for ignition stage, fire growth stage (including flashover characteristics such as high compartment temperatures and irradiance), and large‑room fires.
- Ignition source characterization: Guidance to choose ignition sources representative of end‑use hazards and to consider thermal characteristics and ventilation effects.
- Performance parameters: Emphasis on metrics such as ease of ignition, flame spread, rate of heat release, smoke generation and combustion product toxicity.
- Design and test guidance: Requirements for specimen orientation, end‑use conditions, and test design to ensure representative intermediate‑scale results.
- Reporting: Information expected in a test report to document relevance and reproducibility.
- Examples of tests: References to intermediate or medium scale methods used in practice (e.g., IEC 61034‑2 3 m cube, ISO 5658‑4 vertical flame spread, ISO 14696 ICAL, EN 13823 SBI, ISO 24473 open calorimetry, ISO 21367 medium scale).
Practical applications
ISO 15791-1 is intended to guide selection and development of test methods when small‑scale tests are insufficient and full‑scale tests are impractical. Typical applications include:
- Housings for electrical appliances and conduits
- Profiled sheets, roofing and panels
- Pipes and ventilation components (ships, trains, aircraft)
- Furniture, containers and waste bins
- Composite panels and structural mouldings
The guidance helps ensure test specimens, orientation and ignition sources reflect real operating and installation conditions so test results are meaningful for safety decisions.
Who should use this standard
- Fire safety engineers and researchers designing representative tests
- Product designers and manufacturers of plastic components and composites
- Test laboratories developing intermediate‑scale methods
- Regulators and certification bodies assessing fire performance evidence
- Quality and compliance teams performing product development and pre‑selection
Related standards and references
- ISO 13943 (Fire safety - Vocabulary)
- ISO/TR 13387‑2 (design fire concepts referenced)
- Practical test methods cited in the standard (EN, IEC, ISO test methods listed above)
Keywords: ISO 15791-1, intermediate-scale fire tests, plastics fire testing, fire scenarios, rate of heat release, flame spread, smoke generation, fire performance.