Overview
ISO 26261-2:2017 - Fireworks - Category 4 - Part 2: Requirements specifies construction, performance and protective packaging requirements for Category 4 fireworks (as defined in ISO 26261‑1). The document sets mandatory checks for integrity, ignition protection, performance parameters, type testing and batch testing, and labelling. It excludes articles containing highly hazardous substances (e.g., arsenic, lead compounds except igniters, mercury compounds, white phosphorus, picrates) and theatrical pyrotechnics designed for stage or film use.
Key topics and technical requirements
- Scope & exclusions: Applies to Category 4 consumer/ professional fireworks; explicitly excludes pyrotechnic compositions containing certain toxic/explosive substances and theatrical stage articles.
- Pyrotechnic composition: No fixed NEC (net explosive content) limits are given; NEC affects safety distances and specialists must determine safe use (see ISO 26261‑4).
- Construction & integrity: Visual inspections verify case integrity (no holes, splits, dents or bulges), correct dimensions and gross mass per manufacturer declaration, and secure attachment of elements in combinations.
- Means of ignition: Must be clearly identifiable and suitably protected to prevent accidental ignition; conformity checked by visual examination.
- Performance testing:
- Limits on loose pyrotechnic composition after mechanical conditioning: maximum 3% of NEC and not more than 1 g per item (or whole loose material if inseparable).
- Functioning and stability during use (items must not behave erratically and must remain in position if instructed).
- Measured performance parameters (mandatory list in Annex A) recorded per test methods.
- Tolerances: Type test results ±20% relative to measured average (labelled value); batch tests ±30% relative to label. Sound pressure tolerance handled separately - maximum displayed on the label and batch must not exceed it.
- Extinguishing of flames, projection of debris, and burning/incandescent matter are assessed and labelled if applicable.
- Protective pack: Requirements for packaging to protect items during transport and handling are included.
- Conformity assessment: Detailed provisions for type testing, batch testing, sampling plans (ISO 2859‑1 referenced), nonconformity categories and test reporting.
Applications - who uses it
- Fireworks manufacturers and importers (product design, production controls, labelling)
- Test laboratories conducting type tests and batch tests
- Safety specialists and event professionals responsible for Category 4 fireworks deployment
- Regulators and conformity assessors verifying compliance and sampling plans
Related standards
Keywords: ISO 26261-2, Category 4 fireworks, fireworks safety, protective packaging, type testing, batch testing, pyrotechnic composition, performance parameters, labelling.
