GB 46520-2025

This standard specifies the fire safety performance requirements for thermal insulation materials and products used in building construction, including classification, test methods, and acceptance criteria for burning behavior. It is applied in the design, production, and quality inspection of insulation materials such as foam plastics, mineral wool, and aerogel blankets to ensure compliance with building fire codes. The standard is primarily used by manufacturers, construction engineers, and regulatory authorities in China to evaluate and certify the fire risk of insulation products in residential, commercial, and industrial buildings.