What safety standards apply to flame-retardant canvas outdoor chairs?

Flame-retardant canvas outdoor chairs must meet specific safety standards to ensure they resist ignition and slow fire spread. Key standards include:

1. CPSC Guidelines (U.S.): The Consumer Product Safety Commission regulates flammability requirements for outdoor furniture, ensuring materials self-extinguish when exposed to flames.

2. EN 1021 (Europe): Tests upholstered furniture for ignition resistance, including outdoor canvas chairs.

3. NFPA 701 (U.S.): Certifies flame-retardant fabrics used in public spaces, often applied to commercial outdoor furniture.

4. CAL 117 (California): Strict flammability standards for upholstered items, including outdoor seating.

5. ISO 5660: Measures heat release and smoke production during combustion.

Manufacturers often treat canvas with chemical coatings (e.g., ammonium sulfate) or use inherently fire-resistant fibers. Look for labels like "FR-treated" or certifications from independent labs (e.g., UL, SGS). Always verify compliance with local regulations for residential or commercial use.