Overview - ISO 9828-1:2025 (Railway fire protection, Part 1: General)
ISO 9828-1:2025 sets out the general framework for fire protection on railway vehicles. It establishes the Operation Categories, Design Categories, high-level fire safety objectives, and the general requirements that apply across the ISO 9828 series. The standard applies to railway vehicles defined in ISO 25711 and explicitly excludes freight transportation vehicles.
Key purposes:
- Minimize probability of ignition (accidental, arson, technical faults)
- Control fire development and spread
- Reduce heat, smoke and toxic combustion products affecting passengers and staff
- Define classification rules that determine applicable requirements
Key topics and technical requirements
- Operation Categories (OC 1–6) - classify vehicles by service and infrastructure (e.g., short tunnels, side evacuation availability, running-time to place of safety). These categories determine fire-safety expectations for a route or operation.
- Design Categories (A, D, S, N) - classify vehicles by design features (e.g., automatic trains without emergency staff, double-deck, sleeping/couchette, standard vehicles).
- Fire safety objectives - prevention, detection, containment, suppression, evacuation support, and enabling emergency response.
- Ignition models - the standard considers a range of ignition scenarios, from small public-access sources (newspapers, cigarettes, lighters) to technical faults (arcs, high temperatures) and larger fire models; these inform material and system requirements.
- General requirements - include use of low‑reaction-to-fire materials, fire barriers, fire detection and alarm systems, suppression and energy shut-down measures, emergency lighting and wayfinding, evacuation capability and vehicle running capability to reach safe areas.
- Maintenance and refurbishment - replacement parts must conform to the document or be equivalent in fire performance; testing laboratories should meet ISO/IEC 17025.
Practical applications and users
Who uses ISO 9828-1:2025:
- Rolling stock designers and manufacturers (vehicle layout, material selection)
- Railway operators and infrastructure managers (route OC assignment, procurement)
- Safety and fire engineers (risk assessment, specification of detection/suppression)
- Procurement teams (specifying vehicle classification like “2–N”)
- Maintenance teams and refurbishment contractors (component compliance)
- Test laboratories (material testing per referenced standards)
Practical uses:
- Define vehicle procurement specifications and contractual requirements
- Inform interior material selection, fire barriers, and evacuation design
- Guide operational rules for routes with tunnels or limited evacuation
- Support conformity assessment and maintenance policies
Related standards
- ISO 25711 - vocabulary for fire safety of rolling stock (normative reference)
- ISO/IEC 17025 - laboratory competence for material and product fire testing
- Other parts of the ISO 9828 series - provide detailed, part-specific fire protection measures and tests
Keywords: ISO 9828-1:2025, railway fire protection, fire safety for railway vehicles, operation categories, design categories, rolling stock fire protection, fire detection and suppression.
